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N-2919 ENGLISH 12 / 2011

PROPERTY OF PETROBRAS 85 pages, 1 form and WG

Three-Phase Induction or Synchronous Electrical Motors

Procedure

The CONTEC - Authoring Subcommittee provides guidance on the interpretation of this Standard when questions arise regarding its contents. The Department of PETROBRAS that uses this Standard is responsible for adopting and applying the sections, subsections and enumerates thereof.

CONTEC Comisso de Normalizao

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Technical Requirement: A provision established as the most adequate and which shall be used strictly in accordance with this Standard. If a decision is taken not to follow the requirement (non-conformity to this Standard) it shall be based on well-founded economic and management reasons, and be approved and registered by the Department of PETROBRAS that uses this Standard. It is characterized by imperative nature.

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Recommended Practice: A provision that may be adopted under the conditions of this Standard, but which admits (and draws attention to) the possibility of there being a more adequate alternative (not written in this Standard) to the particular application. The alternative adopted shall be approved and registered by the Department of PETROBRAS that uses this Standard. It is characterized by verbs of a nonmandatory nature. It is indicated by the expression: [Recommended Practice]. Copies of the registered non-conformities to this Standard that may contribute to the improvement thereof shall be submitted to the CONTEC - Authoring Subcommittee.

Electricity Proposed revisions to this Standard shall be submitted to the CONTEC - Authoring Subcommittee, indicating the alphanumeric identification and revision of the Standard, the section, subsection and enumerate to be revised, the proposed text, and technical/economic justification for revision. The proposals are evaluated during the work for alteration of this Standard.

This Standard is exclusive property of Petrleo Brasileiro S. A. - PETROBRAS, internal application and PETROBRAS Subsidiaries and shall be used by its suppliers of goods and services under contracts or similar under the conditions established in Bidding, Contract, Agreement or similar. The use of this Standard by other companies / organizations / government agencies and individuals is the sole responsibility of the users.

Introduction

PETROBRAS Technical Standards are prepared by Working Groups - WG (consisting specialized of Technical Collaborators from Company and its Subsidiaries), are commented by Company Units and its Subsidiaries, are approved by the Authoring Subcommittees - SCs (consisting of technicians from the same specialty, representing the various Company Units and its Subsidiaries), and ratified by the Executive Nucleus (consisting of representatives of the Company Units and its Subsidiaries). A PETROBRAS Technical Standard is subject to revision at any time by its Authoring Subcommittee and shall be reviewed every 5 years to be revalidated, revised or cancelled. PETROBRAS Technical Standards are prepared in accordance with PETROBRAS Technical Standard N-1. For complete information about PETROBRAS Technical Standards see PETROBRAS Technical Standards Catalog.

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Summary

Foreword .................................................................................................................................................. 5

1 Scope ................................................................................................................................................... 5

2 Normative References ......................................................................................................................... 5

3 Terms and Definitions .......................................................................................................................... 9

4 General Requirements of the Motor .................................................................................................. 10

5 Electrical Characteristics of the Motor ............................................................................................... 11

5.1 Operating Characteristics ..................................................................................................... 11

5.2 Starting, Torque and Locked Rotor Characteristics ............................................................. 11

5.3 Performance and Energy Efficiency Requirements ............................................................. 13

6 Motor Mechanical and Thermal Characteristics ................................................................................ 15

6.1 Paint Protection System for Installation in Industrial and Marine Environments ................. 15

6.2 Degree of Protection (IP Code) of the Housing and Terminal Boxes .................................. 16

6.3 Cooling Methods - IC Codes and Requirements for Fans ................................................... 17

6.4 Acceptable Noise Levels ...................................................................................................... 18

6.5 Power and Control Terminals Boxes .................................................................................... 18

6.6 Requirements for Anti-condensation Heating Resistors ...................................................... 19

6.7 Terminals and Connectors for Power, Control and Grounding Circuit Cables .................... 20

6.8 Rating, Identification and Safety Warning Plates ................................................................. 20

6.9 Acceptable Vibration Levels ................................................................................................. 21

6.10 Bearing Requirements and Types ...................................................................................... 22

6.11 Bearing Lubrication Requirements ..................................................................................... 22

6.12 Requirements for Tubular Heat Exchanger ....................................................................... 23

6.12.1 Requirements for Air/Air Tubular Heat Exchanger .................................................... 23

6.12.2 Requirements for Air/Water Tubular Heat Exchanger ............................................... 24

6.13 Motor Thermal Characteristics Requirements ................................................................... 25

6.14 Requirements for Instruments and Sensors for Monitoring and Measurements ............... 26

7 Selection of the "Ex" Protection Type, EPL and Construction and Performance Requirements of Motor for Installation in Classified Areas .......................................................................................... 28

8 Specific Requirements for Synchronous Motors and Excitation Digital Systems .............................. 31

9 Requirements for Inspection, Factory Acceptance Test (FAT), Field Acceptance Test (CAT) and IPT37

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10 Technical Documentation to be Submitted by the Manufacturer .................................................... 45

10.1 Technical Documentation to be Submitted Along With the Proposal ................................ 45

10.2 Technical Documentation to be Submitted After the Purchase Order Placement ............. 47

10.3 Manuals of Transportation, Preservation, Installation, Operation, Inspection, Maintenance and Repair ......................................................................................................................... 50

10.3.1 Instructions for Transportation, Preservation and Installation (Section 1 of the Manual)...................................................................................................................... 50

10.3.2 Operating Instructions (Section 2 of the Manual) ...................................................... 51

10.3.3 Instructions for Inspection, Maintenance, Assembly and Disassembly (Section 3 of the Manual) ............................................................................................................... 51

10.3.4 Instructions for Repairs, Recovery and Revision (Section 4 of the Manual) ............. 51

10.3.5 Dimensional Drawings, Electromechanical Drawings, Connections Diagrams and Lists of Components in "Certified" Character (Section 5 of the Manual) .................. 52

10.3.6 Routine, Type and Special Tests Reports (Section 6 of the Manual) ........................ 52

10.3.7 Certificates of Conformity and Miscellaneous Documents (Section 7 of the Manual) 52

10.4 Requirements on the Data-Books of the Motor, Auxiliary Systems and Excitation System52

11 Lists of Documents to be Submitted in the Proposal and for Approval after the PO Placement .... 52

12 Standard Forms for Data Sheets ...................................................................................................... 53

Figure

Figure 1 - Simplified Block Diagram of Excitation Digital System, Indicating the Power, Metering, Protection, Control and Data Communication Networks Basic Circuits .............................. 37

Tables

Table 1 -Selection Criteria of "Ex" Protection Type and EPL for Direct Online Motor for Installation in Flammable Gas Classified Area............................................................................................. 29

Table 2 -Selection Criteria of "Ex" Protection Type and EPL for Motor for Installation in Combustible Dust Classified Area ............................................................................................................... 30

Table 3 -Selection Criteria of "Ex" Protection Type and EPL for Motor Controlled by Frequency Converter for Installation in Flammable Gas Classified Area ................................................ 31

Table 4 - List of Applicable Tests to Motors of Induction and Synchronous Types .............................. 41

Table 5 - List of Applicable Tests Only for Motors of Induction Type .................................................... 43

Table 6 - List of Applicable Tests Only for Motors of Synchronous Type ............................................. 43

Table 7 - List of Tests for Set of Motor and Driven Machine (String-test) ............................................. 44

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Table 8 - Technical Documentation to be Submitted Along With the Proposal .................................... 46

Table 9 -Additional Documentation to be Submitted Along With the Proposal for Synchronous Motors, "Brushless" Exciter and Excitation Digital Systems ............................................................... 47

Table 10 - Documentation to be Submitted after the PO Placement .................................................... 47

Table 11 - Additional Documentation to be Supplied After the PO Placement to Synchronous Motors, Brushless Exciter and Excitation Digital Systems ............................................................... 50

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Foreword This Standard is the English version (issued in 11/2013) of PETROBRAS N-2919 12/2011. In case of doubt, the Portuguese version, which is the valid document for all intents and purposes, shall be used. 1 Scope 1.1 This Standard establishes the requirements for the acquisition of three-phase electric motors, low and medium voltage and induction or synchronous types, to be used at PETROBRAS facilities. 1.2 This Standard provides in its Annexes the standardized forms to the Data Sheet of three-phase electric motors of induction and synchronous types. 1.3 The application of this Standard does not exempt the compliance with the regulations of public agencies for which the equipment, services and facilities shall meet. It may be cited as examples of regulations from government agencies the Regulatory Norms of the Ministry of Labour and Employment and Ministerial Ordinances specified by the National Institute of Metrology, Quality and Technology (INMETRO), containing the Conformity Assessment Requirements (RAC) for electrical equipment for explosive atmospheres, in the conditions of flammable gases and vapours and combustible dusts or minimum levels of performance and energy efficiency of low voltage electric motors. 1.4 This Standard applies to projects started from the date of its publication. 1.5 This Standard contains only Technical Requirements. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document applies.

ABNT NBR IEC 60034-5 - Mquinas Eltricas Girantes - Parte 5: Graus de Proteo Proporcionados pelo Projeto Integral de Mquinas Eltricas Girantes (Cdigos IP) - Classificao; ABNT NBR IEC 60034-9 - Mquinas Eltricas Girantes - Parte 9: Limites de Rudo; ABNT NBR IEC 60034-14 - Mquinas Eltricas Girantes - Parte 14: Medio, Avaliao e Limites da Severidade de Vibrao Mecnica de Mquinas com Altura de Eixo Igual ou Superior a 56 mm; ABNT NBR IEC 60079-0 - Atmosferas Explosivas - Parte 0: Equipamentos - Requisitos Gerais; ABNT NBR IEC 60079-1 - Atmosferas Explosivas - Parte 1: Proteo de Equipamentos por Invlucros Prova de Exploso d; ABNT NBR IEC 60079-2 - Atmosferas Explosivas - Parte 2: Proteo de Equipamento por Invlucro Pressurizado p; ABNT NBR IEC 60079-7 - Atmosferas Explosivas - Parte 7: Proteo de Equipamentos por Segurana Aumentada e;

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IEC 60034-30 - Rotating Electrical Machines - Part 30: Efficiency Classes of Single-Speed, Three-Phase, Cage-Induction Motors (IE-Code); IEC 60034-31 - Rotating Electrical Machines - Part 31: Selection of Energy-Efficient Motors Including Variable Speed Applications - Application Guide; IEC 60050-411 - International Electrotechnical Vocabulary - Chapter 411: Rotating Machinery; IEC 60068-2-30 - Environmental Testing, Part 2-30: Tests - Test Db: Damp heat, Cyclic (12 h + 12 h Cycle); IEC 60072-1 - Dimensions and Output Series for Rotating Electrical Machines - Part 1 - Frame Numbers 56 to 400 and Flange Numbers 55 to 1080; IEC 60085 - Electrical Insulation - Thermal Evaluation and Designation; IEC 60270 - High-Voltage Test Techniques - Partial Discharge Measurements; IEC 60664-3 - Insulation Coordination for Equipment Within Low-voltage Systems - Part 3: Use of Coating, Potting or Moulding for Protection Against Pollution; IEC 60751 - Industrial Platinum Resistance Thermometers and Platinum Temperature Sensors; IEC 61086-1 - Coatings for Loaded Printed Wire Boards (Conformal Coatings) - Part 1: Definitions, Classification and General Requirements; IEC 61086-2 - Coatings for Loaded Printed Wire Boards (Conformal Coatings) - Part 2: Methods of Test; IEC 61131-1 - Programmable Controllers - Part 1: General Information; IEC 61131-2 - Programmable Controllers - Part 2: Equipment Requirements and Tests; IEC 61131-3 - Programmable Controllers - Part 3: Programming Languages; IEC 61892-3 - Mobile and Fixed Offshore Units - Electrical Installations - Part 3: Equipment; IEC TR 60034-16-2 - Rotating Electrical Machines - Part 16: Excitation Systems for Synchronous Machines - Chapter 2: Models for Power System Studies; IEC TR 60034-16-3 - Rotating Electrical Machines - Part 16: Excitation Systems for Synchronous Machines - Section 3: Dynamic Performance; IEC TS 60034-17 - Rotating Electrical Machines - Part 17: Cage Induction Motors when Fed from Converters - Application Guide; IEC TS 60034-18-41 - Rotating Electrical Machines - Part 18-41: Qualification and Type Tests for Type I Electrical Insulation Systems used in Rotating Electrical Machines Fed From Voltage Converters; IEC TS 60034-18-42 - Rotating Electrical Machines - Part 18-42: Qualification and Acceptance Tests for Partial Discharge Resistant Electrical Insulation Systems (Type II) Used in Rotating Electrical Machines Fed from Voltage Converters; IEC TS 60034-25 - Rotating Electrical Machines - Part 25: Guidance for the Design and Performance of a.c. Motors Specifically Designed for Converter Supply; IEC TR 60894 - Guide for a Test Procedure for the Measurement of Loss Tangent of Coils and Bars for Machine Windings;

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IEEE STD 112 - Standard Test Procedure for Polyphase Induction Motors and Generators; IEEE STD 1434 - Guide to the Measurement of Partial Discharges in Rotating Machinery; NEMA MG-1 - Motors and Generators.

NOTE For documents referred in this Standard and for which only the Portuguese version is available, the PETROBRAS department that uses this Standard should be consulted for any information required for the specific application.

3 Terms and Definitions For purposes of this document it is applied the following terms and definitions of Electrotechnical International Vocabulary (IEV) on rotating electrical machines, as specified in IEC 60050-411 and as follows. 3.1 degree of protection (IP Code) coding system for the designation of constructional requirements that the motor housing and its accessories shall meet for protection against the inlet of dust and water, according to the requirements specified in ABNT NBR IEC 60034-5 3.2 cooling method (IC Code) coding system for the designation of constructional requirements of the motor, refrigerant fluids and primary and secondary cooling circuits, in accordance with the requirements specified in IEC 60034-6 3.3 constructive form (IM Code) coding system for the designation of constructional requirements of the motor housing, flange and feet, related to the alternative forms of manufacturing and assembling, according to the requirements specified in IEC 60034-7 3.4 efficiency class (IE Code) classes of energy efficiency (IE1, IE2, IE3 or IE4) for three-phase induction motors, with one single rotation to the nominal frequency of 50 Hz or 60 Hz, rated voltage up to 1.0 kV, with 2, 4 or 6 poles and rated power between 0.75 kW and 375 kW, in accordance with the requirements specified in IEC 60034-30 3.5 protection types for explosive atmospheres (Ex) specific protection measures applied to an electric motor or components of its auxiliary systems to avoid causing the ignition of explosive atmospheres of flammable gas or combustible dust around them, according to the requirements specified in ABNT NBR IEC 60079-0 3.6 Equipment Protection Level (EPL) protection level specified by an "Ex" equipment certified for installation in classified areas as, for instance, Ga, Gb, Gc, Da, Db or Dc, in accordance with the requirements specified in ABNT NBR IEC 60079-0 and ABNT NBR IEC 60079-14

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4 General Requirements of the Motor 4.1 Electric motors specified in this Standard shall meet the requirements of Technical Standards specified in Section 2, supplemented by the requirements and technical specifications specified in this Standard. 4.2 Data Sheets receive specific identification for each motor. They are partially filled by PETROBRAS, wherein the manufacturer shall fully complete its fulfilment, whose form is standardized in Annexes B, C, D and E. 4.3 The supplier shall list, in the Data Sheet, the Technical Standards applied to the motor manufacturing and testing, complementing the relationship presented in Section 2 (see Table 8). 4.4 For motors used in marine facilities, if required in the Data Sheet, it shall also be met the requirements specified in IEC 61892-3. 4.5 The fields of the Data Sheet filled out by the manufacturer are considered as "guaranteed values", admitting only the tolerances specified in IEC 60034-1. 4.6 When there is a divergence between the Data Sheet and this Standard, the information contained in the Data Sheet shall prevail. 4.7 If the proposal submitted by the supplier or manufacturer show any differences or alternatives related to the requirements specified in this Standard, in the Data Sheet or Request Material (RM) of the motor, these deviations or alternatives shall be listed in a specific section entitled "List of Proposal Deviations" to be evaluated in the purchasing process. The requirements and purchasing specifications not listed in this "List of Proposal Deviations" by the supplier or manufacturer are considered met. 4.8 The values or requirements indicated in the Data Sheet are considered the minimum requirements to be met. The supplier or manufacturer can indicate in its proposal those values or requirements that are better or superior in performance to the values first indicated in the Data Sheet, such as the degree of protection, temperature class or EPL, since they are listed in the "List of Proposal Deviations" and are accepted by the user. 4.9 The technical specification to be considered for the beginning of the purchasing process are those ones that had been presented for the user or supplier in the proposal, as well as resulting from the process of technical advice and proposal review, done during the quotation process and proposal equalization and approval by the user, including the assessment of the "List of Proposal Deviations". 4.10 All type and special tests required in the Data Sheet shall be individually discriminated in the proposal and specified in the corresponding Inspection and Testing Plan (ITP) to be submitted for approval.

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4.11 The final technical specifications to be considered at the stage of the Factory Acceptance Tests (FAT) and ITP are those that were initially approved in the purchasing process, and any changes and agreements between the supplier or manufacturer and the user, during the purchasing process. These possible changes include those made and agreed during the analysis stage of the documentation submitted for comment and approval and indicated on documentation on certified character, which shall be checked in the inspection and acceptance tests stages in factory or in field. 5 Electrical Characteristics of the Motor 5.1 Operating Characteristics 5.1.1 The motor shall operate in order to meet its primary function, under the operation rated load condition without reducing the electrical insulation lifetime, continuously within the range of variation of voltage and frequency indicated on the Zone A in IEC 60034-1. The motor shall also be able to operate satisfactorily within the limits of Zone B, in accordance with the requirements given in IEC 60034-1. 5.1.2 The motor and its auxiliary systems shall be designed and manufactured taking into account a minimum lifetime of 20 years. They shall also be considered in the equipment sizing, periods of continuous operation with a minimum of 3 years. In these periods of life it is considered the performance of maintenance procedures recommended by the manufacturer. 5.1.3 The motor shall be sized in terms of rated power for driving the load and taking into account any possible additions of the required powers by the process in any operational situation. The motor rated power shall incorporate these possible additions, without any reference to any service factors, which are not considered in this Standard or the standards of IEC 60034 series. The motor manufacturer shall ensure the starting and the operation considering the torque versus rotation curve of the driven machine. 5.1.4 It shall be indicated in the Data Sheet the duty type (S Code), according to the requirements specified in IEC 60034-1. Besides the indication of the duty type, it shall be indicated, where applicable, details of the duty, such as cycle duration factor (%), moment of inertia of the motor (JM) and moment of inertia of the load (JEXT). 5.1.5 Unless otherwise specified in the Data Sheet or required by the driven load, motors with rated voltage up to 1.0 kV, with direct online starting and S1 duty type, shall be category N according to IEC 60034-12. 5.2 Starting, Torque and Locked Rotor Characteristics 5.2.1 The motor shall be sized to start, according to the characteristics of the driven machine and its process operating conditions, with the minimum available voltage value indicated in the Data Sheet.

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5.2.2 Unless otherwise specified in the Data Sheet, the motor shall withstand at least two successive starts from the cold condition, coasting to rest between starts, or one hot start after having operated under rated conditions. The motor shall also withstand an additional start if its temperature before starting does not exceed the thermal equilibrium temperature under rated load. 5.2.2.1 The waiting time required for releasing a third cold start or a second hot direct online start shall be specified by the manufacturer in the Data Sheet. 5.2.2.2 If requested by the user, the maximum waiting time shall be as indicated in the Data Sheet. NOTE The calculation of the waiting times shall take into account the characteristics of the driven

machine, indicated in the respective Data Sheet, completed by its manufacturer. Among these characteristics it shall be considered: speed versus torque curve of the driven machine, inertia of the set, starting time, locked rotor time, driven machine rated rotation (including rotation gearbox ratio where applicable) and the motor temperature.

5.2.3 The relationship between the apparent power absorbed with the locked rotor (kVA START) and the motor rated power (kW RATED) shall not exceed the value specified in the Data Sheet. 5.2.4 Unless otherwise specified in the Data Sheet, the motors with rated voltage up to 1,0 kV, with direct online starting, shall submit the following values of the relationship between initial start-up current (IA) and rated current (IN), at rated voltage:

For three-phase motors with rated power up to 55 kW: IA/IN 8,0; For three-phase motors with rated power from 55 kW up to 150 kW: IA/IN 7,5; For three-phase motors with rated power over 150 kW up to 375 kW: I IA/IN 7,0.

5.2.5 Unless otherwise specified in the Data Sheet, the motors with rated voltage equal or higher than 1,0 kV, with direct online starting, shall submit, at rated voltage, a relationship between initial starting current (IA) and rated current (IN) equal or lower than 6,0. NOTE The tolerances of the indicated values shall be in accordance with the requirements

specified in IEC 60034-1. 5.2.6 Considering the specified rated voltage at the motor terminals and the load torque curve applied to the shaft, the hot locked rotor time shall be, at least, greater than 150 % from the starting time of the driven machine (TLR 1,5 TS) or 5 s greater than the starting time (TLR TS + 5 s), whichever is greater. 5.2.6.1 Considering the lowest starting voltage available in the Data Sheet and torque curve of the load applied to the shaft, the hot locked rotor time shall be at least 2 s greater than the starting time of the driven machine, in this voltage condition (TRB TS + 2 s).

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5.4 Requirements for Motor Driven Frequency Converter 5.4.1 Motor driven by the frequency converter shall have constructive characteristics that allow its use with the specific type of converter adopted, within the range of frequency variation specified in the motor and in the frequency converter Data Sheets. 5.4.2 The motors to be driven by frequency converters shall meet the requirements of IEC TS 60034-17 and IEC TS 60034-25, if required in the Data Sheet. 5.4.3 The motor manufacturer shall provide along with the proposal, the curve of permissible torque versus feed frequency that supports the motor within the range of rotation specified in the motor and in the frequency converter Data Sheets, taking into account the effects of heating caused by variations in the frequency, decreasing in the capacity and auto ventilation as well as the type of frequency converter to be used. 5.4.3.1 The maximum temperature rise of the motor in operating conditions with the converter, throughout the rotation range indicated in the Data Sheet, shall meet the requirements specified in 6.13. The maximum surface temperature of the motor, under the most unfavourable operating with the converter shall meet the temperature class for which the motor was certified. 5.4.3.2 The maximum value of allowable outlet of the motor, to be specified in the Data Sheet, shall consider continuous operation with the frequency control range specified in the Data Sheet, the type of converter and the torque characteristic of the driven load. 5.4.4 Unless otherwise indicated in the Data Sheet, motor driven by frequency converter, with rated power greater than 37 kW shall have Resistance Temperature Detector (RTD") of PT 100 type (100 @ 0 C) in the stator winding. It shall be specified at least a sensor in each phase of the winding or as specified in the Data Sheet. 5.4.5 Motor driven by the frequency converter or soft starting device shall not have capacitors and/or lightning rod for voltage surge protection or power factor correction. 5.4.6 It shall be specified the installation of the grounding terminal inside the motor terminal box, to connect the cables mesh or shielding. 5.4.7 Motors driven by frequency converters with frame size greater than 280 (IEC 60072-1) shall have isolated type bearing on non-drive end or have a suitable method for shaft grounding, to be specified by the manufacturer. 5.4.7.1 Motors driven by the frequency converter certified with a protection type for explosive atmospheres shall consider in their certification process, the method of rotor grounding, if used.

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5.4.8 Unless otherwise specified in the Data Sheet, motors driven by frequency converters with rated power up to 1 200 kW, rated voltage up to 6,0 kV and up to 6 poles, that drive loads with variable torque characteristics of the parabolic or quadratic type, shall be the self-cooled type, with a cooling method IC411 (IEC 60034-6). 5.4.9 For motors with rated voltage up to 1,0 kV, fed by frequency converters, designed to drive loads with constant or linear torque, unless specified unlike in the Data Sheet, a self-cooled type cooling method (IEC 60034-6) shall be specified. NOTE If specified in the Data Sheet motor with cooling method using independent forced

ventilation, the manufacturer shall provide the solution to be adopted, without considering to motor over-sizing.

6 Motor Mechanical and Thermal Characteristics 6.1 Paint Protection System for Installation in Industrial and Marine Environments 6.1.1 The motor shall have protective paint system and constructive characteristics in order to be suitable for installation in industrial and aggressive environments, typical of petroleum facilities and petrochemical industry, with attacks by acid gas containing sulphur compounds, including marine facilities and installation in environments with atmospheric corrosion by particulate material and corrosive compounds. 6.1.2 The constructive characteristics of the motor shall have adequate performance related to resistance to corrosion caused by environmental characteristics and/or special conditions of service at the place where it shall be installed as specified in the Data Sheet. 6.1.3 Unless otherwise specified in the Data Sheet, the motor protection painting system shall be suitable for the following categories of atmospheric corrosivity ("Corrosivity category") in accordance with the requirements specified in ISO 12944-2:

Category C5-I - Very high corrosivity (industrial environment); Category C5-M - Very high corrosivity (marine environment);

6.1.4 Preparation by abrasive blasting of the surfaces to be painted, of the housing, of the bearing caps and protective cap of the fan (deflecting cover), shall meet the degree Sa 2 1/2, in accordance with the requirements of ISO 12944-4. 6.1.5 The paint system used for the motor, including specification of the inks and thicknesses of dried films ("Dry Film Thickness" - DFT) of the inks for the background ("primer"), intermediate and finishing ("topcoat") shall comply with the requirements specified in ISO 12944-5.

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6.1.6 Unless otherwise indicated in the Data Sheet, the durability class ("durability range ") and performance evaluation of the paint system needed to meet the requirements of the corrosivity category C5-I/C5-M indicated in ISO 12944-2, shall meet the requirements durability "M" ("Medium") specified in ISO 12944-5, referring to a minimum durability between 5 and 15 years. 6.1.6.1 This durability requirement shall be met by the motor protection paint systems for housing, end shields and protective fan cover (deflective cover). 6.1.6.2 For motors for marine application ("offshore"), with corrosivity category C5-M it shall also meet the requirements specified in ISO 20340. 6.1.7 The performance checking tests for motor protection paint system shall be performed in accordance with the requirements specified in ISO 12944-6. 6.1.7.1 Unless otherwise indicated in the Data Sheet, the performance test results shall demonstrate compliance with the requirements of Class "M" durability for atmospheric corrosivity category C5-I and C5-M. 6.1.7.2 It shall be submitted, at least, results of the tests (ISO 4624) of blistering, oxidation (rust), cracks, flaking and corrosion after risk. 6.1.8 The final colour of the motor finishing paint shall be as specified in the Data Sheet. Among the possible colours, it can be specified as follows: code Munsell N 6.5 or RAL 7042 (Light gray) for cases of general application or code Munsell 5 R 4 / 14 or RAL 3000 (red security) for motors applying in safety systems. 6.1.9 For additional requirements on the film thickness limitations of the paint applied to the motors for classified areas, refer to 7.5 about requirements for limiting the accumulation of electrostatic charges in non-metallic materials. 6.1.10 The protection painting system specification to be applied in all the components of the motor, as well as the respective test result reports (according to the standards requirements of Series ISO 12944), shall be submitted by the manufacturer along with the proposal for PETROBRAS approval. Technical specifications shall be submitted for the housing, the end shields and protective fan cover (deflective cover), in cases of specific paint systems to each of these parts of the motor. 6.2 Degree of Protection (IP Code) of the Housing and Terminal Boxes 6.2.1 The motor shall have a degree of protection (IP Code) for the housing and the power and control terminal boxes as specified in the Data Sheet, in accordance with the requirements of ABNT NBR IEC 60034-5.

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6.3.7 Unless otherwise specified, the degree of balancing of the rotating set shall comply with the requirements specified in ISO 1940-1 6.4 Acceptable Noise Levels 6.4.1 Unless otherwise specified in the Data Sheet, the maximum sound power (weighted, on the scale "A") produced by the motor shall be conform to the values indicated in ABNT NBR IEC 60034-9, using the test methodology and measurement indicated in that standard. 6.4.2 Unless otherwise specified in the Data Sheet, the noise limit of the motor shall be considered without any load. For cases of motors to be tested with a load, this requirement shall be indicated in the Data Sheet, and shall be met in this case, the noise levels indicated under this condition. 6.4.3 If requested in the Data Sheet, it shall be performed to test the noise level, according to the requirements specified in ABNT NBR IEC 60034-9. 6.4.4 If the motor in its original design of a certified manufacturing line fails to meet the noise requirements specified in this standard, the motor shall be specified with noise baffles or another solution to be proposed by the manufacturer and subject to approval by PETROBRAS. If applicable, the use of baffles or other solution proposed by the manufacturer shall be considered in such certificate of compliance for installation in potentially explosive atmospheres. 6.4.5 In the case of motor driven by a frequency converter and unable to meet the maximum noise limit specified in this standard, measured with a frequency converter, it shall be agreed a new limit between PETROBRAS and the motor manufacturer. 6.4.6 For motors driven by frequency converter, the noise level shall be measured in the frequencies of 15 Hz and 60 Hz, being registered the highest measured value. 6.4.7 For motors driven by frequency converter, with rated voltage up to 1,0 kV, the noise level of motor shall be the result of the motor and converter set test, done in the motor manufacturer installations. The characteristics of the converter used in the test shall be registered in the report. 6.4.8 For motors driven by frequency converter, with rated voltage above 1,0 kV, the motor noise level shall be the result of the motor and converter set test, with procedure to be proposed by the motor supplier and submitted to PETROBRAS approval. 6.5 Power and Control Terminals Boxes 6.5.1 The power and control terminal boxes shall have cable inlets through threaded holes for conduit or cable-glands, in quantities and dimensions as indicated in the Data Sheet. In the case of NPT threaded conical type inlets, they shall comply with the requirements of ANSI / ASME B.1.20.1.

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6.5.2 The construction, mounting and position of the motor terminal box (IM Code) shall be as indicated in the Data Sheet, in accordance with the requirements of IEC 60034-7. 6.5.3 The terminal box shall be properly sized for housing the power and control cables, monitoring and/or heating devices cables, according to the quantity of nominal sections specified in the Data Sheet. 6.5.4 There shall be independent terminal box for power cables and control cables for frame sizes 160 or above. 6.5.5 The terminals for cable connection of RTD for bearings, RTD for windings, anticondensation heater resistance and other accessories circuits may be in the same control terminal box. 6.5.6 The power terminal box of motor with rated voltage greater than 1,0 kV shall have suitable dimensions to contain the terminations of the power supply circuit cables, including the space needed to accommodate the high voltage relief cones (stress cone). Provisionshall also be made for a removable plate to allow motor removal for maintenance without having to undo the termination cones of the high voltage cables. 6.5.7 The power terminal boxes shall have a fixing mode so that it may be installed in any of the four positions (possibility of rotation of 90 to 90 ). This requirement does not need to be met for motors with Ex "de" protection type. NOTE This requirement does not apply to power terminal boxes containing other devices beyond

the power terminals, such as current transformers for differential protection, lightening rod and/or capacitors for protection against voltage surges and capacitors for measuring partial discharge (PD).

6.5.8 The motor power terminal box shall be supplied with support insulators manufactured in non-hygroscopic material. 6.5.9 Motors with enclosures Ex "d" shall have indirect cable inlet into the enclosure. It shall be installed Ex "d" sealed passage bushes in the cable inlet for inside the housing. These motors shall have power and control terminals boxes, as well as Ex "e" type with terminal borne. The motor shall have completed Ex "de" marking. 6.6 Requirements for Anti-condensation Heating Resistors 6.6.1 When asked in the Data Sheet, the anti-condensation heating resistors ("space-heaters") shall operate so that the internal temperature in any part of the motor is located above the condensing temperature and below the temperature referred to the motor insulation system class.

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6.6.2 The anti-condensation heating resistors shall be sized and distributed in inside the motor so that the internal temperature is kept stable with the motor off. 6.6.3 The sizing, quantity and location of the anti-condensation heating resistors inside the motor shall be made to ensure that, with the motor off, the internal temperature is always above the dew point temperature (dew point) on the installation area. This condition shall be met both during the day and during the night, especially in facilities with high levels of relative humidity as sites near the sea and marine facilities (offshore). 6.7 Terminals and Connectors for Power, Control and Grounding Circuit Cables 6.7.1 The motor shall be specified with grounding terminals installed on the outside of the housing, suitable for connection to copper cables with rated section specified in Data Sheet. The amount of grounding terminals on the outside of the housing shall be that one indicated in the Data Sheet. 6.7.2 Motor rated voltage above 1,0 kV (or motor with a voltage below or equal to 1,0 kV, when specified in the Data Sheet) shall have an additional terminal grounding connector inside the power terminal box. 6.7.3 All terminals installed in the power terminal box shall be specified with its connectors, suitable for rated sections of the cables specified in Data Sheet. 6.7.4 Unless otherwise specified in the Data Sheet, any motor with a rated voltage up to 1,0 kV shall be specified with three power terminals which shall connect to the rated voltage specified to the motor. 6.8 Rating, Identification and Safety Warning Plates 6.8.1 The motor data, identification and warning plates, both main and additional, as well as their attachment screws shall be manufactured of stainless steel series AISI 300. 6.8.2 It shall contain, in addition to the requirements in IEC 60034-1, the following data:

a) identification number or model or "part-number" of the bearings or hydrodynamic bearings;

b) maximum allowable time with locked rotor (TRB); c) cooling method designation (IC Code); d) duty type (S Code - IEC 60034-1); e) starting torque category, for S1 to 1,0 kV motor (IEC 60034-12); f) relationship between the locked-rotor current and rated current; g) marking of the protection type and "EPL", according to ABNT NBR IEC 60079-0 and

indicated in the Certificate of Compliance as Ex "nA" Ex "e" Ex "px" Ex "pz" Ex "de" Ex "pD" or Ex "t";

h) temperature class (Class T) according to ABNT NBR IEC 60079-0; i) the maximum temperature reached by the anticondensation heating resistor; j) in the case of motors with Ex "e" protection type the time tE, according to ABNT

NBR IEC 60079-7; k) PETRLEO BRASILEIRO S / A - PETROBRAS; l) name of the Operations Unit (UO) of PETROBRAS; m) PETROBRAS motor identification number (TAG); n) RM number; o) number of the Purchase Order (PO) or Request for Purchase of Goods and Services

(PCS), (In case of purchasing processes carried out directly by PETROBRAS).

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NOTE The information contained in the enumeration above shall be included on the main name plate or in additional plates, which shall also be made of stainless steel AISI 300 series.

6.8.3 The data, identification and warning plates of the motor shall be fixed in non- removable parts of the housing so that, during maintenance work, the exchange of plates will not occur between motor with equal housings. 6.8.4 In the case of motors for explosive atmospheres it shall be installed marking plates containing the marking and the number of the certificate of conformity and the warning plates specified in the standards of ABNT NBR IEC 60079 series for each type of protection "Ex" of the motor, its auxiliary systems and components. 6.8.5 For motors that do not have the serial number marked or printed in low relief on the housing, it shall be installed an additional data plate inside the power terminal box, containing the serial number data and, where applicable, the number of the certificate of conformity for motors certified for explosive atmospheres. This additional data plate shall be made of insulating non-metallic material. 6.8.6 Motors with one-way rotation direction shall have a specific platelet containing an indicative arrow this direction. These plates shall be installed on drive end side of the motor. The requirements of this plate shall meet the requirements specified in this Standard on data, identification and warning plates. 6.8.7 The data, identification and warning plates of the motor shall have their data printed in low relief. These plates and the system of printing or marking of used data or figures shall be resistant to chemical attack, specified environmental characteristics and shall remain legible throughout the expected life time of the motor. 6.8.8 When the data, identification and warning plates of the motor are in inaccessible places for reading, due to the driven equipment characteristics, the motor manufacturer shall provide additional plates to be fixed by the driven equipment. 6.8.9 Motors with rated voltage above 1,0 kV shall have warning plate as follows: "DANGER: HIGH VOLTAGE. DO NOT OPEN WHILE ENERGIZED". 6.9 Acceptable Vibration Levels 6.9.1 For vibration measurement tests performed at the factory with the motor uncoupled, the motor vibration amplitudes shall not exceed the values specified in ABNT NBR IEC 60034-14. The limits of vibration shall be indicated in ITP, as acceptance criteria of the tests. 6.9.2 For the vibration measurement tests performed in the field ("in-situ"), with the presence of "an active environment, "according to the requirements of ABNT NBR IEC 60034-14 in order to ensure integrity of the motors in operation, the limits of the unbound motor vibration shall not exceed values of 2,8 mm/s for Class I (motors with rated power up to 15 kW) and 4,5 mm/s for Class II and III, according to the requirements specified in ISO 10816-1. 6.9.3 When specified motor with cooling method IC611 (IEC 60034-6), the motor shall be built with access to both bearings, through the three conventional directions (horizontal, vertical and axial) allowing them to be performed in the field, after installation, vibration measurements using portable measurement instruments.

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6.10 Bearing Requirements and Types 6.10.1 Unless otherwise specified in the Data Sheet, it may be used roller bearings once the use of hydrodynamic bearings is not required, according to the requirements specified in 6.10.2. 6.10.2 Unless otherwise specified in the Data Sheet, hydrodynamic bearings shall be used in any of the following conditions:

a) when the N x dm product for roller bearings exceeds 500 000, where N corresponds to the rated motor speed in rpm, and dm to the average diameter of the bearing [(D + d) / 2] in millimetres;

b) when the roller bearings fail to meet the requirements of the theoretical life time L10h; c) when the product of the motor rated power (kW) for its rated rotation (rpm) is equal to or

greater than 4 000 000. NOTE The limit of theoretical life time L10h for roller bearings shall be in accordance with the

ISO 281, at least 25 000 h of continuous operation at rated loading conditions and of, at least, 16 000 h with maximum axial and radial loads and rated rotation.

6.10.3 Motor with hydrodynamic bearings for installation in non-classified areas, the distance of separation between the fan and its cover (axial gap) shall be at least 6,35 mm, operating with rated current. For motors certified for classified areas, it shall follow the requirements listed in the axial gap in ABNT NBR IEC 60079-0. NOTE The minimum axial gap is required to absorb expansion and displacement of driven

machines and couplings gaps, without causing axial displacements that may lead the rotor and the fan motor to rub with their stationary parts (fan cover, for instance).

6.10.4 To facilitate coupling of the motor with hydrodynamic bearings to its driven equipment, the motor manufacturer shall:

a) mark the position of the magnetic centre of the motor on the motor shaft; b) mark the axial gap limit on the motor shaft; c) inform in the dimensional drawings of the motor and in the Data Sheet, the value of the

axial displacement of the motor shaft (in mm). 6.11 Bearing Lubrication Requirements 6.11.1 For motor with bearings lubricated with grease, for frames higher than the size 160 (IEC 60072-1), the bearings shall be specified with re-lubrication system by greasing nipples, with a grease fitting prelude or device to output the natural drainage of grease excess. 6.11.2 When specified in the Data Sheet, motor with bearings lubricated with oil in a constant level, the motor shall be provided with automatic lubrication system (e.g., lubricating ring), i.e., oil reservation to maintain a constant level in the bearings. This reservation shall allow direct visual observation of the oil level. 6.11.3 Unless otherwise specified in the Data Sheet, motor with bearings lubricated with oil shall have RTDs for supervision of the bearing temperature. It shall be specified two RTDs for bearing with independent wells, when there is also no requirement for installation of a third sensor, for instance, a thermometer.

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NOTE Where there is an specific need for installation of two temperature sensors of RTD type and

a third temperature sensor (e.g., thermometer type), in the cap, it can be used a duplex RTD, of six wires in one of the wells, being the thermometer installed in another well of the cap.

6.11.4 If specified in the Data Sheet, motor with rated voltage greater than 1,0 kV shall have a provision for the installation of connection devices to the bearings lubrication system of "oil-mist" type. In this case, the motor shall have connection devices for external input pipes and lubricating oil output with NPT taper thread with a rated diameter of 1/2 inch. 6.11.5 When specified in the Data Sheet the installation of sealing devices in the bearing housings, these devices shall be of the labyrinth type, with static sealing (motor stopped) and dynamic (motor operating at rated rotation), ensuring a degree of protection required for the motor (IP Code). 6.11.6 In motors with rated voltage greater than 1,0 kV that drive flammable gas compressors, the lubrication system of the motor bearings shall not use or share the same system of oil used for sealing or lubrication of the gas compressor. 6.11.7 It shall be met the requirements for temperature measurement in bearings indicated in IEC 60034-1. 6.11.8 If specified in the Data Sheet the installation of a pressure switch in the forced lubrication, for monitoring the pressure of the lubricating oil system, in bearings with forced lubrication, it shall have output of solid-state type without sparking contacts. 6.12 Requirements for Tubular Heat Exchanger 6.12.1 Requirements for Air/Air Tubular Heat Exchanger The air/air heat exchanger, if required, shall meet the requirements specified in 6.12.1.1 to 6.12.1.5. 6.12.1.1 The heat exchangers shall be constructed or assembled in the motor housing in order to allow easy access for assembly and shall be specified with a thermometer fixing device in the exchanger air outlet. The connection of this thermometer shall have NPT conical taper thread, with diameter of 3/4 inch. 6.12.1.2 For motors with IC611 cooling method (IEC 60034-6) the tubes of the air/air heat exchanger shall be made of an aluminium alloy containing a maximum of 0.2 % copper. If required in the Data Sheet, the exchanger tubes shall be manufactured in stainless steel Series AISI 300 or copper alloy (brass). 6.12.1.3 In motor with air/air tubular heat exchanger, the cooling circuits shall be designed and constructed in order to not to produce high external pressure and internal low pressure regions next to the bearings, in order to prevent the entry of gases, dusts and humidity inside the motor housing. 6.12.1.4 For installations under the weather, motors with rated power above 1 200 kW shall have air/air heat exchangers according to the IC51X or IC61X cooling methods (X can be any movement method of 1 to 8), according to the requirements specified in IEC 60034-6.

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6.12.1.5 Air/air heat exchanger with mass above 25 kg shall have eyelets for lifting. 6.12.2 Requirements for Air/Water Tubular Heat Exchanger The air/water type heat exchanger, if required in the Data Sheet, shall meet the requirements specified in 6.12.2.1 to 6.12.2.17. 6.12.2.1 It shall be compatible with the specifications of the type, temperature and pressure at the entrance of water in the heat exchanger, indicated in the Data Sheet, especially with respect to requirements about corrosion resistance, depending on water quality and outdoor installation. 6.12.2.2 Unless otherwise specified in the Data Sheet, the pipes of the air/water heat exchanger shall be constructed of copper-nickel alloy, with 90-10 Cu-Ni composition. 6.12.2.3 In cases in which the equipment operates with seawater, the heads (covers) and mirrors shall be made of non-metallic materials, such as naval brass alloy 465. The fins shall be made of copper, so that it shall not to suffer galvanic corrosion process resulting from the dissimilarity of the materials (pipe/fin union). 6.12.2.4 The exchanger shall be constructed with characteristics and position to facilitate access and maintenance, i.e., the heads (covers) and the beam shall be removable type. All the tubes shall be easily accessible for cleaning and pipe, that may present any leaks, shall allow lock by plugs or sealing plugs. 6.12.2.5 The exchanger shall have safeguards that prevent, in case of leakage or tubes rupture, that the poured water gets in touch with the motor windings. Unless otherwise specified in the Data Sheet, protection against leaks shall be obtained through a double pipe. 6.12.2.6 The motor design shall forecast that the air/water exchanger return head is positioned out of the box, and a removable cover shall be specified in the box to any exchanger maintenance. 6.12.2.7 The heat exchanger shall be specified with leak detector in the water circuit. If using a double pipe this alarm system shall detect the leak between the internal and the external tube. 6.12.2.7.1 The detector shall be suitable for the area classification of the motor installation area and shall have the protection type "Ex" indicated on the motor Data Sheet. 6.12.2.7.2 In case of using leak detector with intrinsic safety protection type (e.g. "i"), the protective barriers shall be intrinsic safety type with galvanic insulation. These protective barriers shall be installed near the motor and shall have types of protection "Ex" suitable for the area classification of the motor installation area. The barriers protection shall not be installed inside explosion proof metal boxes that require sealing units or cable-press with Ex "d" protection type. 6.12.2.8 The motor with air/water heat exchanger shall have collection bins under the mirrors for drainage of any possible leakage, which shall be directed to the detector and to a drain visible on the outside of the motor. 6.12.2.9 The inner tubes of double pipe heat exchanger shall have a minimum outer diameter of 15 mm and a minimum wall thickness of 1,25 mm. The outer tubes of the double pipes shall have a minimum wall thickness of 1,05 mm.

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6.12.2.10 The loading loss between the water inlet and outlet of the heat exchanger does not exceed the value of 0,7 kgf/cm2 (84 kPa). 6.12.2.11 If specified in the Data Sheet, the exchanger shall be specified with thermometers for local indication of cooling water inlet and outlet temperatures. The connections of these thermometers shall have taper thread NPT type with a diameter of 3/4 inch. 6.12.2.12 If specified in the Data Sheet, the exchanger shall be specified with a pressure transmitter in order to monitor the pressure difference between water inlet and outlet of the heat exchanger. This differential pressure transmitter shall have a kind of "Ex" protection type appropriated to the area classification of the motor installation area. The connection of this transmitter shall be NPT threaded conical type with a diameter of 3/4 inch. 6.12.2.13 Unless otherwise required in the Data Sheet, air/water heat exchangers shall have connections to breathe ("vent") and drain with NPT taper thread type with a diameter of 3/4 inch. 6.12.2.14 All threaded connections shall be specified with metal pipe plugs, suitable for operating temperature and pressure. 6.12.2.15 The screws under pressure shall be in accordance with the applicable standards for specified operating pressure and temperature. Unless otherwise specified in the Data Sheet, bolts shall be made of stainless steel type A193-B8M (AISI 316). 6.12.2.16 It shall be installed on opposite sides of the motor housing, windows for heat exchanger visual inspection. 6.12.2.17 The connecting flanges of the outer inlet and outlet water tubes shall meet the technical requirements, dimensional, pressure class and flange, in accordance with the requirements specified in ASME B16.5 or standards required by classifiers entities. 6.13 Motor Thermal Characteristics Requirements 6.13.1 The motor electrical insulation system shall be Class F or higher thermal class according to the requirements specified in IEC 60085 and IEC 60034-18-1. 6.13.1.1 The motor insulation shall be Class F or higher, however, the motor temperature rise shall not exceed the limit temperature set for Class B (IEC 60034-1). This temperature rises shall be considered in the operation of the motor in conditions of rated voltage, current and frequency, and an ambient temperature of 40 C. 6.13.1.2 This temperature rise requirement shall also be observed in the condition of motor driven by frequency converter. In this case, the value of the temperature rise can be determined by calculations made by the motor manufacturer (using the standards referenced in Section 2 of this Standard) or by set test. 6.13.1.3 Closed water-cooled motors, using ICW (IEC 60034-6) cooling method that is cooled with air in the primary circuit and with water in the secondary circuit, shall be dimensioned so that the reference point for testing the temperature rise is the water temperature, at the inlet point of the heat exchanger according to the requirements and alternatives specified in the "Reference refrigerant fluid " of the IEC 60034-1.

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6.13.2 The motor shall be designed and sized to meet the requirements for thermal protection specified in IEC 60034-11. 6.13.3 The motor manufacturer shall inform the values of heating and cooling thermal time constants of the motor. 6.13.3.1 These values of thermal time constants ( in minutes) shall be indicated in the respective fields on the Data Sheet. 6.13.3.2 The values of heating and cooling thermal time constants of the motor shall be specified by the manufacturer considering the electric motor as a homogeneous body, modelled as a first order thermal system. 6.13.3.3 These values of thermal time constants shall provide adequate parameterization of protection functions such as thermal protection (Function 49) and re-start inhibition (Function 66) in its Intelligent Electronic Device (IED) of the motor, according to the ABNT NBR IEC 60255-8 requirements specified. 6.13.4 It shall be submitted on the same graph, the curves of thermal level limit ("current versus time") for damage to the stator (overload in operation) in the range of one to three times the motor rated current, and damage to the rotor (locked rotor), ranging from three to eight times the motor rated current. 6.13.4.1 The curves of thermal level limit shall be developed based on the value of the constant thermal time of the motor heating ( in minutes) specified by the manufacturer in the Data Sheet. 6.13.4.2 The curves of thermal level limit shall be specified for all motors with rated power above 55 kW. 6.13.5 If required in the Data Sheet, the motor shall be designed and sized to attend the effects of unbalanced voltages on the performance of three phase induction motors with squirrel cage, in accordance with requirements specified in IEC 60034-26. NOTE For motors with rated voltage up to 1,0 kV, with performance in the starting time category N

(IEC 60034-12), the design and dimensioning of the motor shall take into account the existence, in the motor power supply terminals, an unbalance three-phase voltage up to 1,0 % without derating, according to the requirements specified in IEC 60034-26. The motor shall be rated to withstand constant operating in nominal conditions, especially the additional heating of the rotor, depending on the negative sequence circulation of the currents and skin effect (skin-effect).

6.14 Requirements for Instruments and Sensors for Monitoring and Measurements 6.14.1 If specified in the Data Sheet the need of thermometers installation for monitoring of the bearing temperature or the air or water temperature at the inlet /outlet of the heat exchanger, this shall have dual-stage actuation (alarm and/or trip), and be the proximity inductive type without electrical sparking contacts.

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6.15.3 For motors designated by offshore applications, all the motors with a rated voltage equal to or higher than 4,0 kW shall have a stator winding sealing system so that they will be subject to the spray-test type, according to the procedures specified in the NEMA MG-1. 6.16 General Constructive Requirements of the Motor 6.16.1 Motors designed for installation in environment with a high corrosivity category (ISO 12944-2) shall have, at least, the following constructive characteristics:

a) the assembly and attachment elements shall be made of stainless steel AISI 316 or zinc or cadmium or bi-chromatized. It shall be used assembly elements with a combination of these four types of elements;

b) protective paint systems for the motor housing, bearing caps and external fan protection cover (deflective cover), appropriate to the environmental characteristics, as required in this Standard and specified in the Data Sheet;

c) sealing elements or labyrinths between the shaft and lids (including motor with Ex "de" protection type, where flame passage areas shall be in accordance with the requirements of ABNT NBR IEC 60079-1);

d) protection system or device in the passage area of power and control cables by the housing, so that it may prevent dust inlet in the windings region.

6.16.2 Motor with mass equals to or higher than 25 kg shall have eyelets for lifting. 6.16.3 At the end of the motor shaft there shall be an axial bore, internally threaded, aiming to facilitate the coupling installation process. 6.16.4 For motor with rated voltage equal to or higher than 11,0 kV shall be specified TCs for differential protection, surge protective capacitors and lightning rods. 6.16.5 When specified in the Data Sheet the need for installation of TC of window or bar type for differential protection, the set (TC and interconnection windings bars) shall be fully assembled in the terminal box, in the factory, according to the wiring diagrams specified by the motor manufacturer. 7 Selection of the "Ex" Protection Type, EPL and Construction and Performance

Requirements of Motor for Installation in Classified Areas 7.1 Motors with a "Ex" protection type certified for installation in classified areas with flammable gases or combustible dusts, shall have certification of compliance in accordance with the RAC indicated in the current legislation applicable in Brazil. 7.1.1 These "Ex" Certificates of Compliance shall have been issued by a Product Certification Body (OCP) accredited by INMETRO for both motor manufactured in the country and for motor manufactured abroad, according to the requirements specified in the current legislation applicable in Brazil. 7.1.2 "Ex" Certificates of Compliance shall be provided with their respective attachments. They shall have a validity period on the submission date. These certificates shall be supplied complete, including title page, other sheets and attachments, in electronic files with PDF format.

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7.1.3 If the motor certified for installation in classified area has special installation and safe operation conditions, the certificate of conformity shall have the symbol "X," in accordance with the requirements indicated in ABNT NBR IEC 60079-0. 7.1.4 It shall be observed the requirements and restrictions on importation and installation of "Ex" equipments without national certification as indicated in the current legislation in Brazil about the assessment of the conformity of equipments for explosive atmospheres. 7.1.5 In the case of high voltage motors, where it is not available the submission of certificates of conformity of the production line at the proposal stage, this certification shall be submitted after the manufacturing process, testing, evaluation and certification of the motors, their components and other auxiliary systems. In these cases, the final approval and release of the motor purchasing process is also conditioned to the approval of the certification process. 7.2 The "Ex" protection type and the EPL required for motor for installation in classified areas shall be selected and specified in accordance with the general requirements specified in ABNT NBR IEC 60079-14. 7.2.1 Unless otherwise specified in the Data Sheet, selecting the "Ex" protection type and the EPL of the motor shall conform to the requirements specified in Tables 1 and 2. 7.2.2 The selection of the required "Ex" protection type and the EPL refers to motors with direct online starting and operation at rated frequency. Table 1 - Selection Criteria of "Ex" Protection Type and EPL for Direct Online Motor

for Installation in Flammable Gas Classified Area

Rated Voltage (UN) (kV)

Area classification of flammable gas

Zone 1 Zone 2

Protection type EPL Protection type EPL

PN 1,0 Ex e or Ex de

(See 7.2.3) Gb

Ex e Gb

Ex nA Gc

1,0 < PN 6,0 Ex e or Ex px Gb

Ex e Gb

Ex pz Gc Ex nA

(See 7.2.4)

PN 6,0 Ex px Gb Ex pz Gc 7.2.3 Unless otherwise specified in the Data Sheet, for motors with voltage below 1,0 kV, in cases of classified areas as Zone 1 type - IIC Group, motors shall be supplied with Ex "e" protection type (ABNT NBR IEC 60079-7). 7.2.4 Unless otherwise specified in the Data Sheet, in the general case of application in classified areas as flammable Zone 2 type, requiring equipment with EPL Gc, for motors with rated voltage greater than 1,0 kV to 6,0 kV, the motors shall have Ex "nA" protection type (ABNT NBR IEC 60079-15).

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Table 2 - Selection Criteria of "Ex" Protection Type and EPL for Motor for Installation

in Combustible Dust Classified Area

Rated Voltage (UN) (kV)

Area classification of combustible dust

Zone 21 Zone 22

Protection type EPL Protection type EPL PN 1,0 Ex tb Db Ex tc Dc

1,0 < PN 6,0 Ex pD or Ex tb Db Ex pD Db Ex tc

(See 7.2.5) Dc

PN 6,0 Ex px Gb Ex pD Dc 7.2.5 Unless otherwise specified in the Data Sheet, in general application cases, in combustible dust classified areas of the Zone 22 type, that require equipment with EPL Dc, for motors with voltage rated greater than 1,0 kV to 6,0 kV, the motors shall have Ex "tc" protection type (ABNT NBR IEC 60079-31). 7.3 Assessment of Ignition Risk Factors Due to Potential Discharge in the Stator Windings and

Sparks in the Air Gap when Starting Motors with Ex "e" and Ex "nA" Protection Types 7.3.1 Motors with Ex "e" and Ex "nA" protection types shall be specified taking into consideration the requirements of "Evaluation of potential risk of sparking in the air gap Ignition risk Factors, in cases indicated in ABNT NBR IEC 60079-7 and ABNT NBR IEC 60079-15. 7.3.2 For motors with Ex "e" or Ex "de protection types, with voltage above 1,0 kV, shall be indicated by the user in the Data Sheet the risk factor for potential discharge ignition in the stator windings, according to the requirements specified in ABNT NBR IEC 60079-14. 7.3.3 Motor with Ex "e" (ABNT NBR IEC 60079-7) or Ex "nA" (ABNT NBR IEC 60079-15) protection type shall have a prototype (rotor or stator representative or motor) previously submitted to the test with gases, corresponding to the group from the installation area. This prototype test procedure shall be applied to ensure the motor operation without the need for special protection measures when starting, including pre-purge system. 7.4 Requirements for Motors with "Ex" Protection Type Driven by Frequency Converter or Soft-Starter

(Soft Start Devices) 7.4.1 "Ex" motors shall be manufactured to meet the requirements specified in ABNT NBR IEC 60079-14 for operation with frequency converters or soft-starters. 7.4.2 Motors for installation in classified areas to be driven by frequency converters or soft-starters shall have "Ex" protection type and EPL for explosive atmospheres of flammable gases indicated in Table 3.

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Table 3 - Selection Criteria of "Ex" Protection Type and EPL for Motor Controlled by

Frequency Converter for Installation in Flammable Gas Classified Area

Rated Voltage (UN) (kV)

Area Classification of Flammable Gas

Zone 1 Zone 2

Protection type EPL Protection type EPL

PN 1,0 Ex de or Ex e Gb Ex nA Gc

1,0 < PN 6,0 Ex px Gb Ex nA or Ex pz Gc

PN 6,0 Ex px Gb Ex pz Gc 7.4.3 Motors with rated power up to 375 kW and rated voltage up to 1,0 kV shall be certified together with a frequency converter or a "soft-starter." The technical characteristics of the frequency converter or the soft-starter used for the motor certification shall be described in the certificate of conformity or the manufacturer's technical documentation, referenced in the motor certificate. 7.4.4 The certification of compliance of the motor shall cover actual operating conditions regarding to the rotation range, torque type and the frequency converter technical characteristics used in the type tests for the motor certification, indicated in the certificate of compliance or in the motor manufacturer documentation referenced in the certificate. NOTE The certificate of conformity or the manufacturer's documentation referenced in the "Ex" motor

certificate apt to be driven by frequency converter or soft-starter shall indicate the minimum technical specifications required to enable the acquisition of the converter or the soft-starter separately from the motor.

7.4.5 Motors with rated power over 375 kW and rated voltage up to 1,0 kV or motors with rated voltage over 1.0 kV shall have certificate of conformity showing that these are suitable to operate with the same type of frequency converter or soft-starter. NOTE It shall be considered that the frequency converter or soft-starter that drives the "Ex"

motor is installed in a non-classified area or within a building or a protected environment by an artificial pressurization (ABNT NBR IEC 60079-13).

7.5 Motors for installation in classified areas shall meet the requirements specified in ABNT NBR IEC 60079-0 about accumulation limiting of electrostatic loads. These limitations are applied to the maximum values normalized to surface areas of the non-metallic parts, fan peripheral speeds and maximum film thickness of painting systems to external surfaces of the enclosures, based on non-metallic materials. 8 Specific Requirements for Synchronous Motors and Excitation Digital Systems In this Section the specific requirements applicable to synchronous motors and respective excitation digital systems are indicated. The other requirements presented in this Standard apply to induction and synchronous motors, where applicable or indicated in the respective Data Sheet or RM.

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8.6.6.2 Local signalling of alarms and failures of the system and the motor:

a) programmable digital outputs; b) storage of at least 100 past events; c) programming and configuration menu with reprogrammable password; d) date and time for time stamping of events and faults (Real Time Clock).

8.6.6.3 The excitation system shall have field contactor and associated suppression devices, protection for all electronic and digital modules, as well as means of identification of failure circuits and electronic modules. 8.6.6.4 The excitation digital system shall perform time synchronization for continuous adjustment of the controller internal clock. The standard signals for synchronization through an external time device (GPS), added to the excitation digital system, shall be indicated in the Data Sheet. 8.6.6.5 The excitation digital system shall allow the user to close a control loop with the equipment itself. For this, the user shall be able to enter the parameters of the motor in the simulation by the graphical interface and put the system in simulation mode. This system shall be suitable to be used in the steps of commissioning, equipment testing and verification and for the staff training of the operation, maintenance and engineering areas. 8.6.6.6 If requested in the Data Sheet, the excitation system shall have protection from defects to ground of the excitation circuit, in two levels: alarm and trip. 8.6.6.7 The excitation system shall have control modes of the "auto/manual" type and have protection from voltage proportional to the frequency. 8.6.6.8 Unless otherwise specified in the Data Sheet, the static excitation digital system shall have power, control, monitoring and redundant protection circuits. The control circuit shall be specified with a high performance microprocessor, two independent mono-channel systems, auto transfer between the channels due to failure conditions or external command, "automatic" and "manual" control modes on each channel, with a follower circuit with auto equalization of the reference value. The two channels shall have the ability to operate in "master" condition. 8.6.6.9 The transfer from the control mode (automatic/manual) and of the operating mode (Local/Remote) shall be possible under any operating condition, without the occurrence of voltage and load variations. If requested redundant channel operation, the same applies to the transfer between the operation channels. 8.6.6.10 The operation through the manual channel shall not inhibit any of the functions and characteristics of the auto channel. 8.6.6.11 In the event of any defect in an operation channel, the transfer to the other channel or the manual mode shall occur automatically, taking this one to the same previously established operating point (tracking). 8.6.6.12 The operating modes shall be deployed by independent channels (measurement, control, protection, monitoring, operation and alarm electronic systems, auxiliary systems and power supplies), with automatic transfer to manual, in case of failure of the automatic channel, without disturbances (bumpless or bounceless characteristic).

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8.6.6.13 Each single channel power source shall be independent, to avoid failures in common mode. 8.6.6.14 The excitation system shall have interface with data protocol communication as required in the Data Sheet. Through this interface, the excitation system shall be able to provide the main system internal variables, as well as data about the events and diagnoses records, to a complete monitoring of the panel. 8.6.6.15 The command, control and monitoring functions of the excitation system shall be locally available on the excitation system panel and remotely in the control system of the plant. All digital and analogue (4 mA to 20 mA) inputs and for setting, starting and control, alarms and signals shall be available for interfacing with these control digital systems. 8.6.6.16 The "auto/manual", "local/remote" and "on/off" select commands shall be also available by wire (hardwired). 8.6.6.17 The excitation system operating functions, including "auto/manual" control mode and "local/remote" operating mode shall be accomplished without the need for opening the panel. 8.6.6.18 If requested in the Data Sheet, the excitation digital system shall contain an integrated power system stabilizer module (PSS). 8.6.6.19 Equipments, electronic components and printed circuit boards used in the excitation digital system shall have protection against attacks by aggressive agents or corrosive gases present on the oil industry (such as H2S, SO2, NO2, CL2, NH3, dust, air salinity, etc.) and the simultaneous presence of high levels of air relative humidity and ambient temperature. In these cases, these electronic components shall have "conformal coating" type specific treatment. The printed circuit boards shall meet, in these applications, the requirements specified in IEC 60664-3, IEC 60068-2-30, IEC 61086-1 and IEC 61086-2. 8.6.6.20 The excitation digital system shall store the set-point data, configuration parameters, readings and measurement in the non-volatile memories. 8.6.6.21 The power factor controller shall allow settings of upper and lower current limits in the motor and in the field. The TCs and TPs for the measurement of line currents and voltages of the motor are supply scope of the manufacturer of the motor power panel. The excitation panel manufacturer shall inform the technical data required of these measurement TCs and TPs, including the transformation ratio, precision and required load. 8.6.6.22 The excitation control panel shall have a front "display" to indicate the analogue and digital system variables, at least alarms, protections, signals and measurements, according to the required in this Standard. 8.6.6.23 The excitation system shall have a serial port dedicated for the local configuration, suitable for connecting with a laptop computer. 8.6.6.24 All system settings shall be accessible to the user. In the event of settings to be made using proprietary software, there shall be no lockout requiring PETROBRAS to pay for the license for the software use. The configuration software shall be part of the supply scope, be active in the supply process and have a valid license for an indefinite period. The software shall be compatible with the operating systems approved by PETROBRAS.

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8.6.6.25 The excitation system shall be sized so that it may provide a maximum continuous current value of not less than 110 % of the excitation current required by the motor, when operating at full load, with an overvoltage of 5 % and unity power factor. 8.6.6.26 The excitation system shall provide maximum excitation voltage not less than 160 % ("Ceiling voltage") in relation to the nominal value at rated power with response time less than 0,5 s. 8.6.6.27 The excitation system shall maintain its output voltage within the range of + / - 1 % of the adjusted value for variations in the ambient temperature in a range of 0 C to 70 C including field heating effects for stabilized operating conditions, from the no-load condition to the rated power, with unity power factor. 8.6.6.28 The system operation shall be continuous, with no dead zone, compensated and stabilized, with enough gain to keep the motor terminal voltage within the range of 0,5 % of the reference voltage in steady state. 8.6.6.29 Unless otherwise specified in the Data Sheet, the excitation system shall incorporate, at least, the following monitoring, alarm, control and protection functions:

a) protection against over-excitation (Function 24); b) under-voltage Protection (Function 27); c) monitoring and alarm functions (Functions 30/74); d) protection against field or excitation loss (Function 40); e) incomplete sequence protection (Function 48); f) thermal overload protection (Function 49); g) grounding fault protection of the DC system for powering of the "Brushless" exciter

(Function 50 GS); h) inverse-time overcurrent protection (Function 51); i) excitation checking protection (Function 53); j) protection function by power factor (Function 55); k) supervision function of the field application failure ("Field Application Relay" - FAR)

(Function 56); l) monitoring of rotating diodes failure (Function 58); m) overvoltage protection (Function 59).

8.6.7 Requirements for the Field Pre-Excitation and De-excitation:

a) the de-excitation system shall ensure the discharge of all the energy stored when opening the field contactor in the most critical condition. Over-voltages that may occur shall not cause damage to any part of the equipment;

b) the field contactor shall be able to interrupt the field current during transitory abnormalities, supporting the maximum voltage and energy from the resulting arc;

c) the field contactor shall have auxiliary contacts available for interlock with the protection and control system of the synchronous motor;

d) in case of failure in the pre-excitation, there shall be a signalling corresponding to this defect.

8.6.8 Command, control and supervision signals to be sent or received through the serial interface:

a) automatic/manual control mode indication; b) local/remote operation mode indication; c) field current and voltage indication; d) automatic/manual control mode selection; e) "status" indication of the field contactor (open/closed); f) power factor setting;

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g) thyristor failure indication; h) defects summary alarm; i) activation of the power factor automatic controller (Automatic Power Factor Regulator -

APFR); j) automatic/manual and local/remote control; k) watchdog-type timer; l) incomplete starting sequence; m) current under-excitation; n) current over-excitation; o) rotating diodes failure; p) rotor grounding failure alarm; q) synchronism failure; r) excitation system overload; s) excitation system under-voltage; t) general protection failure; u) fuses failure; v) feed-back failure of the controller; w) power factor controller failure; x) protection unlock (reset), with the possibility of local unlocking only; y) excitation voltage measurement; z) excitation current measurement.

8.6.9 Requirements for Excitation System and Power Factor Automatic Control (APFR) Panels 8.6.9.1 The panels shall have degree of protection (IP Code, according to the ABNT NBR IEC 60529), according to the required in the Data Sheet. 8.6.9.2 Unless otherwise required in the Data Sheet, the panels of the excitation digital system shall be suitable for indoor installation in a non-classified area. 8.6.9.3 If it is required in the Data Sheet that the excitation digital system panels have to be installed in classified areas, they shall have Ex "pz" Gc protection type (ABNT NBR IEC 60079-2) for installation in Zone 2 or Ex "px" Gb type (ABNT NBR IEC 60079-2), for installation in Zone 1 or Ex "pD" Db type (ABNT NBR IEC 61241-4) for installation in areas of Zone 22 or Zone 21 types. 8.6.9.4 The panels shall have protective paint system in accordance with the requirements specified in the standards of ISO 12944 series related to the corrosiveness in the typical environment of oil industry facilities and its performance required for this level of corrosiveness. 8.6.9.5 Unless otherwise specified in the Data Sheet, the finishing colour of the excitation system panels shall be light gray, Munsell code N 6.5 or RAL 7042. 8.6.10 Supply Scope of Spare Parts for Excitation Digital System and Rotor Rotary Diodes:

a) it is part of the supply scope materials and components needed to replacement during the system commissioning phase;

b) the technical and commercial proposal shall provide a list of operation spare components for the excitation digital system panel, including and electrical, electronic and digital components and devices installed in the panel;

c) the technical and commercial proposal shall include a list of electric spares for the motors, including electronic components fixed to the rotor and its fixation devices such as diodes, thyristors and field discharge rotary resistors installed in the synchronous motor shaft;

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d) it shall be presented in the commercial proposal the discriminated unit prices for each item, piece, part, device or component. It is PETROBRAS over discretion the acquisition or not, of all or part of the operating spare materials of the list specified in the proposal.

8.6.11 In Figure 1 it is shown a simplified block diagram representing an excitation digital system, indicating the power, measurement, protection, control and data communication network basic circuits. In this simplified figure it is presented a system with redundant architecture and configuration of control and power electronic systems.

transformerExcitation

voltage

current

failure supervisorRotary diode

Brushlessexciter

overvoltageDeexcitation and

protection

limiters,values,

of actualDetection

trip circuit,auto / manual

values,of actualDetection

APFR 1

Protectionpanel

Human-machineinterface

Internal link

linkCommunication

channel channel

limiters,trip circuit,

auto / manual

Synchronousmotor

Power panel

power factorExcitation and

control system

Motor

Motor

PLC / SDCD

Figure 1 - Simplified Block Diagram of Excitation Digital System, Indicating the

Power, Metering, Protection, Control and Data Communication Networks Basic Circuits

9 Requirements for Inspection, Factory Acceptance Test (FAT), Field Acceptance Test

(CAT) and IPT The motor inspection activities, FAT and CAT, shall check, at least, the points specified in this Section. For the case of motors for marine installation, the tests required by the respective Classification Society shall also be performed. 9.1 The existence of the technical documentation, related to this supplying, certified by the manufacturer and approved by the PETROBRAS project body or by the designer in charge of the project (drawings, diagrams, manuals, certificates and catalogues of accessories). 9.2 The existence of the instruments calibration certificates to be used in the tests, issued by bodies such as the Brazilian Calibration Network (RBC) in Brazil or equivalent overseas and within their expiry dates.

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9.11.2 The execution of partial discharges tests shall be part of the IPT and the FAT. 9.11.3 If requested in the Data Sheet, the partial discharges test reports shall contain the information specified in IEC 60034-27, including:

a) information of the motor under test; b) information of the motor user; c) information on the motor operation; d) information about the test circuit and equipment; e) information about the test conditions; f) info