1_1_1

Low voltage air circuit-breakers

SACE Emax

ABB SACE L.V.

Technical catalogue

604019/011 enMarch '99

690 V 800-6300 A 40-150 kA (380/415 V)

IntroductionTechnology and innovationfor advanced plantengineering requirements 2

More efficient, saferinstallations 4

Intelligent design 6

Design tools 8

Compact switchboards 9

Optimal warehousemanagement 10

A design dedicatedto Quality and respectfor the environment 12

Standards, approvals,certifications andcompany Quality System 14

Main characteristicsElectrical specifications 18

Constructioncharacteristics 20

Identification of circuit-breakers 26

Versions andconnections 27

SACE PR111 and PR112microprocessor-basedovercurrent releases 28

Derived versions 32

Special versions 35

Accessories 36

Ordering codesSACE Emax E1Circuit-breaker 128

SACE Emax E2Circuit-breaker 131




SACE Emax E1/MSSwitch-disconnector 150





SACE Emax CSIsolating truck 162

SACE Emax MTPEarthing switch 163

SACE Emax MTEarthing truck 164

SACE Emax PFFixed parts 165

Circuit-breaker andfixed part accessories 167

Microprocessor-basedreleases and currenttransformer 172

Conversion kit forfixed circuit-breakeror fixed parts 173

GENERAL INDEX

Installation inswitchboardsInstallation inswitchboards 38

Change in the rateduninterrupted currentin relation totemperature 42

Derating in altitude 48

Current-limiting andspecific let-throughenergy curves for circuit-breakers E2L - E3L 49

Overcurrentreleases andrelative accessoriesOvercurrent protectionwith SACE PR111microprocessor-basedreleases 52

Trip curves of circuit-breakers with SACEPR111 releases 56

Overcurrent protectionwith SACE PR112microprocessor-basedrelease 58

Trip curves of circuit-breaker with SACEPR112 releases 62

SACE PR010/Ksignalling unit 67

SACE PR010/Tconfiguration test unit 68

AccessoriesCircuit-breaker andfixed part accessories 70

Spare parts andretrofitting 84

Applications of thecircuit-breakerPrimary and secondarydistribution 86

Selectivity tables 90

Earth fault protection 91

Switching and protectionof transformers 96

Protection of lines 97

Switching and protectionof generators 98

Switching and protectionof asynchronousmotors 100

Switching and protectionof capacitors 102

Overall dimensionsFixed circuit-breaker 104

Withdrawable circuit-breaker 108

Mechanical interlock 113

Circuit-breakeraccessories 114

Electrical circuitdiagramsOperating state shown 118

Circuit diagramsymbols 119

Electrical circuitdiagrams 120

Introduction

Characteristics

Installation in switchboards

Accessories

Applications of thecircuit-breaker

Overall dimensions

Circuit diagrams

Releases

Ordering codes

2Technology and innovationfor advanced plant engineering requirements

The constant increase in the technological and functional com-plexity of electrical installations makes it essential for everycomponent - particularly those such as protection circuit-breaker s which are crucial to safety - to offer the highest lev-els of continuity of service and reliability combined with mini-mal maintenance requirements.

ABB SACE L.V. has designed the new generation of SACE Emaxlow voltage air circuit-breakers in line with these advancedplant engineering requirements, and featuring high resistanceto mechanical, electrical and thermal stresses.

SACE Emax circuit-breakers represent the logical functionalcomplement to SACE Isomax S moulded case circuit-breakersand have, like them, been designed for integration and perfectco-ordination with the different lines of ABB low voltage prod-ucts.

The design and manufacture of the new circuit-breakers fol-low advanced ergonimical criteria, in line with the solutionsadopted for selection and use of SACE Isomax S switchgear -entirely to the benefit of all catagories of customers and users.

Two aspects received particular attention during design: themodular versatility and physical dimensions of the differentsizes, reduced from the six of the SACE Megamax series tofour.

SACE Emax circuit-breakers are available in five different models:E1, E2, E3, E4 and E6, each of which benefits from the inter-changeability of the various different versions of moving parts(with different breaking and rated current capacities) for thesame fixed part. The rated uninterrupted currents range from800 to 6300 A.

The breaking capacities, which have been improved in rela-tion to the previous series, range from 40 kA to 150 kA (380/415 V a.c.).

The new serieshas been designedin accordance withthe most modernergonomical criteria,and the evidencefor this can be seen in theprize awarded to thecircuit-breakers at theHanover Forum Design.

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The principal benefits of thenew SACE Emax circuit-breakers are as follows:

Smaller overall dimensions Dimensions (height and

depth) the same across theentire series

Common accessories forthe entire range

The same service releasesfor a.c./d.c. applications

Shared components - e.g.the opening and closingreleases are the same

Easy assembly of the cur-rent transformers (CT)

Accessories fitted withoutneed for cabling, reducingstock levels and optimisinglogistical costs

Distances from exposedconductive parts to be re-spected zero for withdraw-able circuit-breakers

Simplified construction ofelectrical switchboards.

Briefly, high safety, quality,and rational design charac-teristics combined with com-pact dimensions are the re-sults of the totally innovativedesign criteria which lie be-hind SACE Emax circuit-breakers.

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More efficient, safer installations

SACE Emax circuit-breakers not only ensure the high level ofreliability needed to achieve the necessary service continuity,but also offer a high level of safety for everyone operating onthe installation, both during functional customisation andduring inspection and maintenance.

The risk of carrying out incorrect and dangerous sequencesof operations is impeded by the presence of suitable locks.

Each sequence is only enabled if all the conditions which en-sure it can be carried out safely and correctly have been re-spected.

In any case, the state of the switchgear is automatically takento the highest safety level for the operator performing theoperation.

Accessories are installed from the front of the circuit-breakerwithout cabling and the accessories section is separate fromthe power circuit.

Going into greater detail, the main solutions adopted to pro-tect operators in the various different operating conditions areas follows:

Double insulation, to ensure total segregation of the seatingsfor accessories from the power circuit.

Key locks or padlock devices, to control enabling of open-ing and closing operations and/or racking in and out

Racking out with the door closed, to enable the circuit-breaker to be racked out and into its fixed part with the switch-board door closed.

Anti-insertion locks, to prevent mobile parts being insertedin fixed parts with different rated currents or when the cir-cuit-breaker is closed.

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SACE Emax circuit-breakersoffer outstanding reliability interms of both mechanicaland electrical life, and in thefield of low voltage appara-tus up to 6300A, represent

the maximum in terms of per-formance, whilst with regardto their structural character-istics, their indices allow ahigh level of sturdiness to beachieved.

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Intelligent design

Electrical installation designers choosing the new SACE Emaxcircuit-breakers can offer a vast range of solutions that enablethem to satisfy the specific demands of every user withoutobliging them to adapt their needs to the switchgear avail-able.

When looking through the detailed SACE Emax catalogue ofthe complete and highly specialised range, the versatility andpossibility of optimal sizing become immediately apparent.The rated current and breaking capacity levels have beenstudied to ensure optimal sizing in all plant configurations. Inaddition to this, the designer and end user benefit from a fur-ther important performance feature: the possibility of integrat-ing SACE Emax circuit-breakers in intelligent control and su-pervision systems.

The need to optimise the management of electrical installa-tions is increasingly being recognised today, particularly wherepower consumption, control, monitoring, diagnostics and, con-sequently, maintenance operations are concerned.

Benefiting from the know-how acquired with its other series ofcircuit-breakers, ABB SACE L.V. has specially designed and

manufactured a family of microprocessor-based releases,called SACE PR111 and PR112, that are able to provide awide range of important dedicated functions for SACE Emaxcircuit-breakers.

The SACE PR112 release, in particular, features a 16 bit micro-processor and 12 bit analogue to digital converter, making itsperformance even more accurate.

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SD-P2 SD-P2 SD-P2

PR512PR112

PR211PR1

PR211

SD-D1 / SD-D2

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The circuit-breakers fitted with microprocessor-based releasesoffer load control, self-test and information transmission ca-pabilities in addition to the traditional protection functions, ena-bling them to be interfaced with centralised control and su-pervision systems. ABB SACE L.V. offers all the componentsneeded to build systems that are tailored to each installation,from field units to front ends (with standard communicationprotocols), from actuators to control systems.

As a result, the work of specifiers and designers is consider-ably simplified when it comes to choosing the technical char-acteristics and performance required.

All this is thanks to the fact that the selection criteria are com-mon to several families of circuit-breakers and use intuitiveand easy-to-read codes and symbols.

The new circuit-breakers build on the successful experienceacquired with the SACE Isomax S family, continuing a traditionof switchgear designed and manufactured paying particularattention to use and user interface-related aspects, with obvi-ous advantages in terms of ergonomics, clarity and speed ofidentification.

Optic fibre

Copper cable

Personal Computerfor supervision and control

electro-optical converters 4 max

MV SWITCHBOARD LV SWITCHBOARDRange of Emax, Megamax,

Isomax S and LV circuit-breakersnot provided with

microprocessor units

Level 2

Level 3

Level 1

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Design tools

Three highly useful work tools are avail-able for designing and sizing electricalinstallations (DOC software, slide rule kit,guide to L.V. installations) which facilitatecalculations, ensure the installation con-forms to the relevant standards and de-crease the risks of errors. They includeinformation on different low voltage prod-ucts such as: air circuit-breakers,moulded case circuit-breakers, modularcircuit-breakers, contactors, thermal re-lays, fuse switch-disconnectors.

The two main software products devel-oped by ABB SACE L.V., called D.O.C.and C.A.T.s, have been put together on asingle CD-Rom.

D.O.C. (Design Optimization & Compu-tation) is an optimized sizing system forlow voltage industrial installations and isable to recommend the best design se-lections for cables, busbars and protec-tion devices. It allows the design engineerto develop clear and complete designdocumentation rapidly in compliance withthe most recent standards.The C.A.T.s (Computer Aided Technicalselection) is both an electronic catalogueand a technical instrument for helping toselect and add accessories to each sin-gle circuit-breaker. By means of guidedpaths, the most suitable apparatus for therequirements of individual installations canbe selected, configured and ordered. De-tailed documentation is also available, con-taining the instruction, maintenance andinstallation manual and the technical con-struction drawings for each product.There are some utility programs which

also allow generation of orthogonal views,configured in Autocad format, as well asdrawing of the trip curves of the variousreleases.

Four different coloured slide rules formthe ABB kit, enabling rapid electrical in-stallation sizing calculations. They can beused to calculate:

The sizing of cables and calculation ofshort-circuit currents (yellow slide rule)

Verification of cable protection againstdirect contact and short-circuits (orangeslide rule)

Selective and back-up co-ordination(green slide rule)

The sizing of motor lines and transformeroutgoing feeders (blue slide rule).

The calculation methods and data on theslide rules have been obtained from theCEI, IEC and NFC Standards in force andfrom plant engineering practice.

The guide to low voltage installationsis a summary of the legal and technicalregulations based on current standardsregarding the design, sizing and instal-lation of electrical systems. The guideconsiders the user installation startingfrom the power supply (MV/LV substa-tion) in category 1 systems.

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Compact switchboards

The need to build increasingly compactswitchboards to satisfy the architecturaland technical requirements of modernbuildings while simultaneously rationalis-ing the related construction process is fullymet by the new SACE Emax circuit-break-ers which have a constant depth and heightfrom 800 through to 6300 A.

The new ABB SACE L.V. air circuit-breaker makes it possible to standardisethe support structures for the circuit-break-ers, considerably facilitating constructionof the switchboards themselves.

The reduced width of the circuit-breakeroffers the benefit of more rational use ofthe space available and makes it possibleto build compact switchboards both in thecase of standard 400 mm (up to 2000 A)and standard 1000 mm columns.

Moreover, the fact that a wide range of ter-minals is available for the entire seriesmakes it possible to build switchboardsmounted against walls or switchboardswhich can be accessed from behind withrear connections.

Fixed418 mm

Withdrawable461 mm

Fixed 302 mmWithdrawable 396.5 mm

W Fixed Withdrawable3/4 POLI 3/4 POLI

E1 - E2 296 / 386 324 / 414

E3 404 / 530 432 / 558

E4 566 / 656 594 / 684

E6 782 / 908 810 / 936

W

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Optimal warehouse management

A single range of accessories serves theentire SACE Emax series of circuit-break-ers. This standardisation enables optimalwarehouse management while simultane-ously ensuring every solution possiblecan be customised. Electrical distributorsand every customer who has to managemaintenance and spare parts for largeinstallations consequently benefits fromsimpler warehouse management.

The ease with which accessories are in-stalled makes modular fitting operationsfast and safe, allowing even the end cus-tomer to carry out the customising re-quired in each different phase of the lifeof an installation.

The designers job is made much easiersince the switchgear can be chosen wellin advance, preventing any overlappingwith the phase for finalising the construc-tion details.

The current transformers for the differentrated currents of the releases are verysimple to change, meaning the end cus-tomer can also carry out this operation.

SACE PR111 and PR112 microproces-sor-based releases are, likewise, easyto change and are also interchangeable.

Moreover, conversion kits are availablefor the different terminal solutions and ver-sions of the circuit-breaker, allowing avery high level of warehouse rationalisa-tion.

The fixed parts for withdrawable circuit-breakers are common to each model, ir-respective of the rated current and break-ing capacity.

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The new circuit-breakers have been de-veloped in an environment where qual-ity research has always been an over-riding commitment. A commitment thatinvolves every company function at ABBSACE L.V. and has made it possible to

A design dedicated to Qualityand respect for the environment

the most prestigious international certi-fication bodies, and conforms to the ISO9001 Standard, while the ABB SACE L.V.test laboratory has been accredited bySINAL.

Commitment to care for the environmentis another priority at ABB, confirmed bythe fact that the Frosinone factorys en-vironmental management system hasbeen certified by RINA.

ABB SACE L.V., the first industrial com-pany in the electro-mechanical sector inItaly to obtain this, thanks to an ecology-centred revision of its manufacturingprocess, has been able to reduce its rawmaterial consumption and machiningscrap by 20%.

obtain prestigious international marks ofrecognition.

The Company Quality System has beencertified by RINA (Registro ItalianoNavale - Italian Naval Register), one of

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ABB SACE L.V.s commitment to protect-ing the environment can also be seen inthe product Life Cycle Assessments(LCA) carried out in its Research Centre.The materials, processes and packag-ing used are chosen with a view to opti-mising the real environmental impact ofeach product, including its energy effi-ciency and recyclability.

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Standards, approvals, certificationsand company Quality System

SACE Emax circuit-breakersand their accessories con-form to the InternationalStandards IEC 947, EN60947 (harmonised in the 17CENELEC countries), CEI EN60947 and IEC 1000, andconform to the relevant CEdirectives:

Low Voltage Directives(LVD) No. 73/23 EEC

Electromagnetic compat-ibility Directive (EMC) No.89/336 EEC.

The apparatus complies withthe specifications of the regu-lations for on-board installa-tions and is approved by thefollowing Naval Registers:

RINA (Italian Naval Regis-ter)

Det Norske Veritas

Bureau Veritas

Germanischer Lloyd

Loyds Register of Shipping

Polskj Reiestr Statkow

The certification of conformity with the above-mentioned productStandards is carried out following European Standard EN 45011by the Italian certification body ACAE (Associazione per laCertificazione delle Apparecchiature Elettriche - Associationfor the Certification of Electric Appliances), recognised by theEuropean body LOVAG (Low Voltage Agreement Group).

The ABB SACE L.V. Quality System conforms to the Interna-tional Standard ISO 9001 (quality assurance model for design,development, manufacture, installation and service) and theequivalent European Standard EN ISO 9001 and Italian StandardUNI EN ISO 9001.

The third party certifying body is RINA-QUACER.

ABB SACE gained its first certification, valid for three years, in1990 and has now received certification for the third time.

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ISO 9001

17

Electrical specifications 18

Construction characteristics 20

Identification of circuit-breakers 26

Versions and connections 27

SACE PR111 and PR112 microprocessor-basedovercurrent releases 28

Derived versions 32

Special versions 35

Accessories 36

INDEX

Main characteristics

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E1 E2

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Specifications common to the entire rangeVoltagesRated service voltage Ue 690 ~ / 250 [V]Rated insulation voltage Ui 1000 [V]Rated impulse withstand voltage Uimp 12 [kV]Service temperature -5 +70 [C]Storage temperature -40 +70 [C]Frequency f 50-60 [Hz]Number of poles 3-4Versions Fixed - Withdrawable

Electrical specifications

Circuit-breaker model

Performance level B B N LCurrentsRated uninterrupted current IuIuIuIuIu [A] 800 1600 1250 1250(at 40 C) [A] 1250 2000 1600 1600

[A] 2000[A]

[A]

Capacity of neutral pole on four-pole circuit-breakers [%Iu] 100 100 100 100

Rated ultimate short-circuit Icu 220/230/380/400/415 V~ [kA] 40 40 65 130breaking capacity 440 V ~ [kA] 40 40 65 110

500/660/690 V ~ [kA] 36 40 55 85

250 V [kA] 36 40 55

Rated service short-circuit Ics 220/230/380/400/415 V~ [kA] 40 40 65 130breaking capacity 440 V ~ [kA] 40 40 65 110

500/660/690 V ~ [kA] 36 40 55 65

250 V [kA] 36 40 55

Rated short-time (1s) Icw (1 s) [kA] 36 40 55 10withstand current Icw (3 s) [kA] 40 40

Rated short-circuit making Icm 220/230/380/400/415 V~ [kA] 84 84 143 286capacity (peak value) 440 V ~ [kA] 84 84 143 242

500/660/690 V ~ [kA] 75,6 84 121 187

Utilisation category (in accordance with CEI EN 60947-2) B B B AIsolation behaviour (in accordance with CEI EN 60947-2) Overcurrent protectionMicroprocessor-based releases for a.c. applications

Operating timesClosing time (max) [ms] 80 80 80 80

Break time for IIcw (max) [ms] 30 30 30 12

Overall dimensionsFixed: H = 418 mm - D = 302 mm L (3/4 poles) [mm] 296/386 296/386

Withdrawable : H = 461 mm - D = 396.5 mm L (3/4 poles) [mm] 324/414 324/414

Weights (c.breaker complete with releases and CT, excluding accessoires)Fixed 3/4 Poles [kg] 42/50 46/55 46/55 45/53

Withdrawable 3/4 Poles (including fixed part) [kg] 65/80 72/89 72/89 70/87

E1 B E2 B-N E2 LRated uninterrupted current (at 40 C), Iu [A][A][A][A][A] 800 1250 1250 1600 2000 1250 1600Mechanical lifewith regular routine maintenance [No. operations x 1000] 25 25 25 25 25 20 20

Frequency [Operations per hour] 60 60 60 60 60 60 60

Electrical life (440 V ~) [No. operations x 1000] 10 10 15 12 10 4 3Frequency [Operations per hour] 30 30 30 30 30 20 20

(1) without intentional delays

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E3 E4 E6

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N S H L S H H V

2500 1250 1250 2000 4000 3200 5000 32003200 1600 1600 2500 4000 6300 4000

2000 2000 50002500 2500 63003200 3200

100 100 100 100 50 50 50 50

65 75 100 130 75 100 100 150

65 75 100 110 75 100 100 150

65 75 85 85 75 85 (*) 100 100

65 75 75 75 100 100 100

65 75 85 130 75 100 100 125

65 75 85 110 75 100 100 125

65 75 85 65 75 85 (*) 100 100

65 75 75 75 100 100 100

65 75 75 15 75 100 100 10065 65 65 65 65

143 165 220 286 165 220 220 330

143 165 220 242 165 220 220 330

143 165 187 187 165 187 165 187

B B B A B B B B

80 80 80 80 80 80 80 80

70 70 70 70 70 70 70 70

30 30 30 12 30 30 30 30

404/530 566/656 782/908

432/558 594/684 810/936

68/80 68/80 68/80 67/79 95/115 95/115 140/170 140/170

100/125 100/125 100/125 100/120 147/190 147/190 210/260 210/260

E3 N-S-H E3 L E4 S-H E6 H-V1250 1600 2000 2500 3200 2000 2500 3200 4000 3200 4000 5000 6300

20 20 20 20 20 15 15 15 15 12 12 12 12

60 60 60 60 60 60 60 60 60 60 60 60 60

12 10 9 8 6 2 1,8 7 5 5 4 3 2

20 20 20 20 20 20 20 10 10 10 10 10 10

(*) The performance at 500 V is 100 kA

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Construction characteristics

StructureThe structure of the circuit-breaker, whichis made out of sheet steel, is extremelycompact and allows the dimensions tobe significantly reduced. Safety is in-creased by adopting double insulation

for the live parts and total segregationbetween the phases.

The dimensions are characterised byhaving the same height and depth forall the circuit-breakers in each version.

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The depth of the withdrawable versionis suitable for installation in 500 mm deepswitchboards. The width of 324 mm (upto 2000 A) for the withdrawable versionallows the switchgear to be used inswitchboard compartments 400 mm

wide. These compact dimensions alsoallow them to replace any models of aircircuit-breakers from earlier series.

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9

10

11

1

3

2

5b

4

6b785a

6a

9

10

11

1

3

2

5

4

678

GSE

M00

98G

SEM

0099


1 Sheet steel supporting structure2 Current transformer for protection release3 Pole group insulating box4 Horizontal rear terminals

5-5a Plates for fixed main contacts5b Plates for fixed arc-breaking contacts6-6a Plates for moving main contacts6b Plates for moving arc-breaking contacts7 Arcing chamber8 Terminal box for fixed version - Sliding contacts for

withdrawable version9 Protection release

10 Closing and opening control of circuit-breaker11 Closing springs

Utilisation category (selective or current-limiting circuit-breakers)The selective (not current-limiting) circuit-breakers are classi-fied in class B. It is important to know their Icw values in rela-tion to any possible delayed operations in the event of short-circuits.

Current-limiting circuit-breakers E2L and E3L belong to classA. The short-time current Icw is not very important for thesecircuit-breakers and is necessarily low due to the operatingprinciple on which they are based. The fact that they belong toclass A does not preclude the possibility of obtaining the nec-essary selectivity (e.g. current-type or time-type selectivity)within the Icw rated short-time withstand current thresholds.

The special features of current-limiting circuit-breakers are alsoworthy of emphasis. In fact, they allow:

significant reduction of the peak current in relation to theprospective value;

drastic limitation of the specific let-through energy (see thecurves on page 49).

The resultant benefits are:

a reduction in electrodynamic stresses;

a reduction in thermal stresses;

savings in the sizing of cables and busbars;

the possibility of coordination with other circuit-breakers inthe series for back-up protection or selectivity.

Selective circuit-breakerE1 B, E2 B-N, E3 N-S-H, E4 S-H, E6 H-VE1 B, E2 B-N, E3 N-S-H, E4 S-H, E6 H-VE1 B, E2 B-N, E3 N-S-H, E4 S-H, E6 H-VE1 B, E2 B-N, E3 N-S-H, E4 S-H, E6 H-VE1 B, E2 B-N, E3 N-S-H, E4 S-H, E6 H-V

Current-limiting circuit-breakerE2 L, E3 LE2 L, E3 LE2 L, E3 LE2 L, E3 LE2 L, E3 L

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4

5

6

2

3

1

7

9

8

Fixed parts ofwithdrawablecircuit-breakersThe fixed parts of withdraw-able circuit-breakers haveshutters for segregating thefixed contacts when the cir-cuit-breaker is withdrawnfrom the compartment.These can be locked in theirclosed position using pad-lock devices.

1 Sheet steel supportingstructure

2 Single earthing pliersmounted on the left for E1,E2 and E3, double earthingpliers for E4 and E6.

3 Safety shutters (degree ofprotection IP20)

4 Terminal supportinginsulating base

5 Terminals (rear, front orflat)

6 Contacts signallingconnected, isolated,isolated for test (to order)

7 Sliding contacts8 Padlock device for safety

shutters (to order)9 Fixing points (4 for E1, E2,

E3 and 6 for E4, E6)

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O

I

O

I

O

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Operating mechanismThe operating mechanism is of the stored energy type, oper-ated using pre-charged springs.

The springs are charged manually by operating the frontlever or using a geared motor, supplied on request.

The opening springs are charged automatically during the clos-ing operation.

With the operating mechanism fitted with shunt closing andopening releases and the geared motor for charging thesprings, the circuit-breaker can be operated by remote con-trol and, if required, co-ordinated by a supervision and controlsystem.

The following operating cycles are possible without recharg-ing the springs:

starting with the circuit-breaker open and the springscharged: closing-opening

starting with the circuit-breaker closed and the springscharged: opening-closing-opening.

The same operating mechanism is used for the entire seriesand is fitted with a mechanical and electrical anti-pumpingdevice.


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10

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6

4

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5

3

1

2

7

10

8

6

4

9

5

11

1

2

7

13

3

12

14

15

1 Trade-mark and model of circuit-breakers

2 SACE PR111 or PR112 release

3 Pushbutton for manual openingoperation

4 Pushbutton for manual closingoperation

5 Lever for manual closing springcharging

6 Electrical rating plate

7 Mechanical signalling device for circuit-breaker open O and closed I

8 Signal for springs charged ordischarged

9 Mechanical signal for protectionrelease tripped

10 Operation counter

11 Key lock in open position

12 Key lock and padlock in isolated-withdrawn position

13 Devices for the racking-in/racking-outoperations

14 Terminal box (only for fixed version)15 Sliding contacts (only for withdrawable

version)

Operating and signallingparts

Fixed version

Withdrawable version

26

800 A

1250 A

1600 A

2000 A

2500 A

3200 A

4000 A

5000 A

6300 A

08

12

16

20

25

32

40

50

63

EEB

N

S

H

V

L

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Emax

0349

GSE

M00

05x

Identification of circuit-breakers

Where the dimensions of the circuit-breakersare concerned, they are divided into foursizes, each with the same external dimen-sions. There is one model in each size, with

For example, code SACE E3 N 25 identifies a circuit-breaker in series E withthe following electrical specifications:Model 3, Icu = 65 kA, Iu = 2500 A.

Series Model Rated ultimate short-circuitbreaking capacity (480V a.c.)

Rated uninterruptedcurrent

the exception of size 1, which has two sizeswith different electrical specifications.The circuit-breakers are identified using thefollowing code:

40 kA / selective

65 kA / selective

75 kA / selective

100 kA / selective

150 kA / selective

130 kA / limiting

27

GSE

M00

06

GSE

M00

07

GSE

M00

08

GSE

M00

09

GSE

M00

10

GSE

M00

11

GSE

M00

12

HORIZONTAL REARTERMINALS

VERTICAL REARTERMINALS

FRONTTERMINALS

FLATTERMINALS

Versions and connections

All the circuit-breakers are available in fixed and withdrawablethree and four-pole versions.

Each model of circuit-breaker has terminals made of silver-plated copper bars which have the same dimensions irrespec-tive of the rated currents of the circuit-breakers.

The fixed parts of each model of withdrawable circuit-break-ers are the same for every rated current and breaking capac-ity of the related moving parts.

A solution with gold-plated terminals is available for specialneeds involving the use of the circuit-breakers in corrosiveenvironments. The fact that different types of terminals areavailable makes it possible to build switchboards that can bemounted against walls or accessed from the rear with rearconnections.

The circuit-breakers can be fitted with different combinationsof top and bottom terminals to meet special installation needs.

HORIZONTAL REARTERMINALS

VERTICAL REARTERMINALS

FRONTTERMINALS

WITHDRAWABLE CIRCUIT-BREAKERS

FIXED CIRCUIT-BREAKERS

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0359

SACE PR111 and PR112 microprocessor-basedovercurrent releases

The overcurrent protection for alternat-ing current installations is provided bytwo types of microprocessor-based re-leases in the SACE PR111 and PR112series which can be installed as alter-natives on SACE Emax circuit-breakers:

SACE PR111 with protection functionsonly

SACE PR112 with protection, currentmeasuring and dialogue functions.

The protection units can be three-phaseor three-phase with neutral dependingon the type of circuit-breaker used (threepole, three-pole with external neutral orfour pole).

The protection unit comprises:

3 or 4 current transformers (CT) de-pending on the number of circuit-breaker poles; the fourth CT may beexternal

one protection unit which can be ei-ther a SACE PR111/P or PR112/P

an opening solenoid which acts di-rectly on the circuit-breaker operatingmechanism (always supplied with theprotection unit).

The SACE PR112 release is availablewith a dialogue unit, to be specified onordering, for remote control and commu-nication with a centralised system. Theprotection and dialogue unit thus takesthe code SACE PR112/PD.

The main characteristics of these micro-processor-based releases are:

operation without the need for an ex-ternal power supply

microprocessor technology (8 bit forSACE PR111 and 16 bit for SACEPR112)

high precision sensitive to the true r.m.s. value of the

current

neutral normally set to 50% of the set-ting for the phases, with the possibil-ity of setting it to 100% (to order onE1, E2, E3 and E4 only).

The main performances which distin-guish the releases are indicated in thefollowing table.

29

SACE PR112SACE PR111

Min

i035

1

Min

i035

0

Protection functions

Overload protection with inverselong time-delay trip

Selective short-circuit protection with inverseor definite short time-delay trip

Instantaneous short-circuit protection withadjustable trip current setting

Residual

Source ground return

Thermal memory for functions L and S

Currents (in phases, in neutral, of earth fault)

Events marked with moment when they occur

Events stored in chronological order

Counting of number of operations and contact wear

Remote setting of protection function, unit configurationand communication parametersTransmission of measurements, states and alarms fromcircuit-breaker to systemTransmission of events and maintenance data fromcircuit-breaker to system

Alarm and release due to release temperature riseAlarm due to microprocessor fault

Parameters set using DIP switchesParameters set using keys and liquid crystal display

Alarm signals for functions L and SComplete management of pre-alarms and alarms forall protection and self-monitoring functionsEnabling key for use in READ (consultation) or EDIT (consultation and setting) mode

Connection-disconnection of loads in relation to the current passingthrough the circuit-breaker

Can be activated for protection functions S and G

Self-test

Measurements

Event marking and data storage

User interface

Load control (with auxiliary unit)

Zone selectivity

Earth fault protection

Communication with centralised supervisionand control system (using dialogue unit)

30

Emax

0327

Min

i035

1M

ini0

350

Versions available

Overcurrent releaseSACE PR111

PR111/P PR111/P PR111/P

SACE PR112PR112/P PR112/P PR112/PD PR112/PD

SACE PR111 and PR112 microprocessor-basedovercurrent releases

31

E1B 800 A

1250 A

E2B 1600 A

2000 A

E2N 1250 A

1600 A

2000 A

E2L 1250 A

1600 A

E3N 2500 A3200 A

E3S 1250 A

E3H 1600 A2000 A

2500 A

3200 A

E3L 2000 A2500 A

E4S 4000 A

E4H 3200 A

4000 A

E6H 5000 A6300 A

E6V 3200 A4000 A

5000 A

6300 A

CURRENT TRANSFORMER SETTINGS (In)C.Breaker Ratedtype current (Iu) R250 R400 R800 R1250 R1600 R2000 R2500 R3200 R4000 R5000 R6300

32

MS CS MTP MT

Emax

0296

Emax

0328

Emax

0329

Emax

0330

E1 E1 B/MS E1/CS 12 E1/MTP E1/MT

E2 E2 B-N/MS E2/CS 20 E2/MTP E2/MT

E3 E3 N-S/MS E3/CS 32 E3/MTP E3/MT

E4 E4 S-H/MS E4/CS 40 E4/MTP E4/MT

E6 E6 H/MS E6/CS 63 E6/MTP E6/MT

Derived versions

The derived versions are available for all the circuit-breakermodels. They are identified by the code of the circuit-breakerfrom which they are derived, completed with the code for theirrelated versions.The dimensions are the same as those of the circuit-breakerson which they are based.

Code of derived version

Switch- Isolating Earthing switch Earthingdisconnector truck with making capacity truck

33

Emax

0335

This version differs from its relatedautomatic circuit-breaker solely in nothaving an overcurrent release fitted.

The switch-disconnectors are availableboth in fixed and withdrawable versions.The electrical characteristics of theswitch-disconnectors are shown in thetable below (to IEC standards 947-3).

E1 B E2 B E2 N E3 N E3 S E4 S E4 H E6 HMS MS MS MS MS MS MS MS

Rated current Iu (40 C) [A] 800 1600 1250 2500 1250 4000 3200 50001250 2000 1600 3200 1600 4000 6300

2000 200025003200

Rated service Ue 50-60 Hz [V~] 690 690 690 690 690 690 690 690voltage [V ] 250 250 250 250 250 250 250 250Rated insulation Ui [V~] 1000 1000 1000 1000 1000 1000 1000 1000voltageRated impulse Uimp [kV] 12 12 12 12 12 12 12 12withstand voltageRatedshort-time Icw (1 s) [kA] 36 40 55 65 75 75 100 100withstand current (3 s) [kA] 40 40 65 65 65 65 Rated making Icm 220440V~ [kA] 75,6 84 121 143 165 165 220 220capacity 500690V~ [kA] 75,6 84 121 143 165 165 187 187(peak value)

Switch-disconnector MS

34

Emax

0355

Emax

035 6

Emax

0357

This version is derived from the relatedwithdrawable circuit-breaker, with all the

The earthing circuit is sized for a short-time current equal to 60% of the maxi-mum Icw of the circuit-breaker it isbased on (IEC 439-1).

The truck is temporarily racked into thefixed part of a withdrawable circuit-breaker to earth the top or bottom termi-nals before carrying out maintenanceoperations on the external circuit when

no residual voltages are envisaged.

breaking and operating mechanismparts replaced by simple connectionsbetween the top and bottom contacts.

It is used as a no-load isolator in caseswhere this use is envisaged in the instal-lation.

Isolating truck - CS

This version is based on the moving partof the corresponding withdrawable cir-cuit-breaker without the overcurrent re-leases and with the top or bottom isolat-ing contacts replaced by connectionsthat short circuit the phases through thecircuit-breaker to earth. The earthingswitch with making capacity is availablewith top or bottom isolating contacts.

The earthing circuit is sized for a short-time current equal to 60% of the maxi-mum Icw of the circuit-breaker on whichit is based (IEC 439-1).

The earthing switch is inserted in thefixed part of a withdrawable circuit-breaker to earth the top or bottom termi-nals before carrying out inspection ormaintenance operations on the externalcircuit in safe conditions. It should beused in cases where earthing of instal-lations with residual or recovery voltagescould occur.

Earthing switch with making capacity - MTP

This version is similar to the isolatingtruck, with the exception that the bottomor top isolating contacts are replacedwith connections that are connected ina short circuit and earthed. The earth-ing truck is available with bottom or topisolating contacts to suit the fixed partof the model.

Earthing truck - MT

Derived versions

35

Emax

0358

Interruttore E2B/E E2N/E E3H/E E4H/ERated uninterrupted Iu [A] 1600 2000 1250 1600 2000 1250 1600 2000 2500 3200 3200 4000current

Rated service Ue [V] 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000voltage

Rated ultimate breakingcapacity under short-circuit Icu [kA] 20 20 30 30 30 50 50 50 50 50 65 65

Rated service breakingcapacity under short-circuit Ics [kA] 20 20 30 30 30 50 50 50 50 50 65 65

Rated short-timewithstand current Icw [kA] 20 20 30 30 30 50 50 50 50 50 65 65

Special versions

SACE Emax circuit-breakers can be sup-plied, in the special version, for ratedservice voltages up to 1000V in alternat-ing current.The circuit-breakers in this version are

three-pole and four-pole version.SACE Emax/E circuit-breakers are par-ticularly suitable for installation in mines,petrochemical plants and for traction.The table below shows the electricalcharacteristics of the range.

SACE Emax circuit-breakers for voltages up to 1000V in alternating currentdefined with the abbreviation of thestandard range (rated service voltage upto 690V a.c.) plus /E and are derivedfrom the corresponding standard SACEEmax circuit-breakers of which they keepthe versions and accessories.The range of SACE Emax circuit-break-ers for applications up to 1000V in alter-nating current is available in the fixedand withdrawable version, both in the

Other versionsOn request, SACE Emax circuit-break-ers can be provided in special versionssuitable for particularly aggressiveambients (SO2/H2S) and for anti-seismicinstallations.

36

Emax

0264

Emax

0267

Emax

0266

Emax

0269

AccessoriesE1 E6 E1 E6

Automatic circuit-breaker Switch-disconnector

Version Fixed Withdrawable Fixed WithdrawableShunt opening/closing release

SOR Test Unit

Undervoltage release

Delay device for undervoltage release

Geared motor for automatic chargingof closing springsMechanical signalof overcurrent releasesMechanical and electrical signalof overcurrent releases trippedElectrical signal for circuit-breakeropen/closedElectrical signal for circuit-breakerconnected/isolated for test/isolatedContact for signallingclosing springs chargedContact for signallingundervoltage release energisedCurrent transformer for the circuit-breakerexternal neutral conductorHomopolar toroid for the earthing conductorof the main power supply Terminal box for fixed version circuit-breaker

Sliding contacts for withdrawableversion circuit-breakerMechanical operation counter

Key lock or padlock devices in open position

Circuit-breaker lock in connected-isolatedfor test-isolated positionAnti-insertion lock for circuit-breakersof different modelsPadlock devices for fixed part shutters

Compartment door mechanical lock

Protection for opening andclosing pushbuttonsIP54 door protection

Interlock between circuit-breakers

Lifting plate

Racking out crank handle

Flange for compartment door

= accessory supplied as standard= optional

37

Installation in switchboards 38

Change in the rated uninterrupted currentin relation to temperature 42

Derating in altitude 48

Current-limiting and specific let-through energycurves for circuit-breakers E2L - E3L 49

CONTENTS


38

Emax

0334


Modular designThe circuit-breakers in the SACE Emax series have been madefollowing modular design criteria to facilitate their installationand integration in L.V. electrical switchboards, giving them thesame depth and height for every model while simultaneouslyachieving a significant reduction in their overall installation di-mensions.

Furthermore, the front metal shield of the circuit-breaker is iden-tical for the entire series. This simplifies the construction of the

switchboard doors since only one type of drilling is requiredand makes the front of the switchboard the same for all sizes.

SACE Emax circuit-breakers are suitable for Power Centreswitchboards and make it easy to comply with the segregationrequirements of the IEC 439-1 and CEI EN 60439-1 Stand-ards.

39

L1 L2 L3PENSA

CE P

R111

-PR1

12

L1 L2 L3PE

SACE

PR1

11-P

R112

N L1 L2 L3PE

SACE

PR1

11-P

R112

N L1 L2 L3PE

SACE

PR1

11-P

R112

Emax

0331

Choosing the type of circuit-breakerNumber of polesThe choice of the number of poles for circuit-breakers whichsimultaneously provide switching, protection and isolation func-tions in three phase installations depends on the type of elec-trical system (TT, TN-S, TN-C, IT) and the type of user or, moregenerally, whether it features a distributed or non-distributedneutral.

THREE-POLECIRCUIT-BREAKERS

For users that do not use theneutral (e.g.: asynchronousmotors) and, generally, forlines without neutral (non-dis-tributed neutral).

In all other cases, with ex-ceptions for the IT system(see CEI Standards 64-8/473.3.2.2).

Current transformers can beinstalled on the external neu-tral of five-wire systems (TN-S) with 3-pole circuit-break-ers

THREE-POLE CIRCUIT-BREAKERS WITH EXTERNALNEUTRAL

Fixed or withdrawableversionThe fixed version of the cir-cuit-breaker has more com-pact dimensions than thewithdrawable version. It isrecommended for installa-tions that can tolerate serv-ice interruptions in the eventof faults or routine mainte-nance.

The withdrawable version ofthe circuit-breaker is recom-mended for:

applications that can onlytolerate brief interruptionsdue to faults or routinemaintenance:

dual lines, one of which isa standby for the other, witha single circuit-breaker foreach pair.

For TN-C systems (interrup-tion of the neutral is not ad-missible because it also actsas the protection conductor).

FOUR-POLE CIRCUIT-BREAKERS

40

ASEM

0031

ASEM

0032

ASEM

0033

ASEM

0034

Emax

0338

Front terminals - For switchboardsmounted on walls with access fromthe front only

Horizontal rear terminals - For switch-boards with access from the rear

Vertical rear terminals - For switch-boards with access from the rear

Flat rear (only withdrawable version)- For switchboards with access fromthe rear

Connecting the main circuit-breaker circuitsWhen designing switchboards, one mustalways bear in mind the problem of mak-ing the most rational connections be-tween the circuit-breaker and mainbusbar system and the busbars to theusers. The SACE Emax series offersswitchboard experts a range of optionsto satisfy different circuit-breaker con-nection requirements.

The figures at the side show a numberof indications for terminal selection.


Degrees of protectionA number of solutions have beenadopted on SACE Emax circuit-break-ers to achieve degree of protection IP22for fixed or withdrawable circuit-break-ers excluding their terminals, and IP30for their front parts using a flange. Auto-matic shutters have been designed forthe fixed parts of withdrawable circuit-breakers which can be locked usingpadlock devices to allow maintenanceof the load side or power-supply side ofthe fixed part.

In addition, a transparent protectivecover is available on request, whichcompletely segregates the front part ofthe circuit-breaker, taking the degree ofprotection to IP54 while still leaving thefront panel and protection release withits related indications fully visible.

IP22 Fixed or withdrawable circuit-breaker, excluding terminals.

IP30 Front parts of circuit-breakers (us-ing flange).

IP54 Fixed or withdrawable circuit-breaker fitted with transparent pro-tective cover to be fixed on the frontof the switchboard (on request).

41

Emax

0342

Power lossThe IEC 439-1 and CEI EN 60439-1 Standards prescribe cal-culations for determining the heat dissipation of ANS (non-standard) switchboards which require the designer to considerthe following:

the overall dimensions

the rated current of the busbars and connections and theirrelated power loss values

the power loss of the switchgear fitted in the switchboard.

The following table provides information on the circuit-break-ers. Where other equipment is concerned, please consult thecatalogues of the relative manufacturers.

Power lossC.-breaker Iu Fixed Withdrawable

3/4 Poles 3/4 Poles[A] [W] [W]

E1 B 800 65 951250 150 230

E2 B-N 1250 70 1301600 115 2152000 180 330

E2 L 1250 105 1651600 170 265

E3 N-S-H 1250 60 901600 85 1502000 130 2252500 205 3503200 330 570

E3 L 2000 215 3302500 335 515

E4 S-H 3200 235 4254000 360 660

E6 H-V 3200 170 2904000 265 4455000 415 7006300 650 1100

NoteThe same Standards prescribe type tests for ASswitchboards (standard factory-manufacturedswitchgear), including those for maximumtemperature rise.

42

SACE Emax E1

10 20 30 35 40 45 50 55 60 65 70

Iu [A]

T [C]

E1 1250

E1 800

1400

1200

1000

800

600

400

200

0

Change in the rated uninterrupted currentin relation to temperature

Temperature derating of SACE Emax seriesThe circuit-breakers can operate at higher temperatures thantheir reference temperature (40 C) in certain installation con-ditions. In these cases the current-carrying capacity of theswitchgear should be reduced.

The SACE Emax series of air circuit-breakers uses microproc-essor-based electronic releases that offer the benefit of greatoperating stability when subjected to temperature changes.

The tables below show the current-carrying capacities of thecircuit-breakers (as absolute values and percentage values)in relation to their rated values at T = 40 C.

Temperature E1 800 E1 1250[C] % [A] % [A]10 100% 800 100% 125020 100% 800 100% 125030 100% 800 100% 125035 100% 800 100% 125040 100% 800 100% 125045 100% 800 100% 125050 100% 800 100% 125055 100% 800 97% 120760 100% 800 93% 116365 100% 800 89% 111870 100% 800 86% 1075

43

SACE Emax E2

10 20 30 35 40 45 50 55 60 65 70

Iu [A]

T [C]

3500

3000

2500

2000

1500

1000

500

0

E2 1600

E2 1250

E2 2000

Temperature E2 1250 E2 1600 E2 2000[C] % [A] % [A] % [A]10 100% 1250 100% 1600 100% 200020 100% 1250 100% 1600 100% 200030 100% 1250 100% 1600 100% 200035 100% 1250 100% 1600 100% 200040 100% 1250 100% 1600 100% 200045 100% 1250 100% 1600 100% 200050 100% 1250 100% 1600 96% 192055 100% 1250 99% 1580 92% 184060 100% 1250 98% 1560 88% 176065 100% 1250 96% 1538 84% 168070 100% 1250 95% 1515 80% 1600

44

SACE Emax E3

10 20 30 35 40 45 50 55 60 65 70

Iu [A]

T [C]

3500

3000

2500

2000

1500

1000

500

0

E3 3200

E3 2000

E3 2500

E3 1600

E3 1250


Temperature E3 1250 E3 1600 E3 2000 E3 2500 E3 3200[C] % [A] % [A] % [A] % [A] % [A]10 100% 1250 100% 1600 100% 2000 100% 2500 100% 320020 100% 1250 100% 1600 100% 2000 100% 2500 100% 320030 100% 1250 100% 1600 100% 2000 100% 2500 100% 320035 100% 1250 100% 1600 100% 2000 100% 2500 100% 320040 100% 1250 100% 1600 100% 2000 100% 2500 100% 320045 100% 1250 100% 1600 100% 2000 100% 2500 100% 320050 100% 1250 100% 1600 100% 2000 100% 2500 96% 306655 100% 1250 100% 1600 100% 1990 98% 2450 92% 293260 100% 1250 100% 1600 99% 1980 96% 2400 87% 279865 100% 1250 100% 1600 98% 1965 93% 2320 83% 266470 100% 1250 100% 1600 98% 1950 90% 2240 79% 2528

45

SACE Emax E4

10 20 30 35 40 45 50 55 60 65 70

Iu [A]

T [C]

7000

6000

5000

4000

3000

2000

1000

0

E4 3200

E4 4000

Temperature E4 3200 E4 4000[C] % [A] % [A]10 100% 3200 100% 400020 100% 3200 100% 400030 100% 3200 100% 400035 100% 3200 100% 400040 100% 3200 100% 400045 100% 3200 100% 400050 98% 3130 96% 382455 96% 3060 91% 364860 93% 2990 87% 347265 91% 2915 82% 329670 89% 2840 78% 3120

46

SACE Emax E6

10 20 30 35 40 45 50 55 60 65 70

Iu [A]

T [C]

7000

6000

5000

4000

3000

2000

1000

0

E6 6300

E6 3200

E6 5000

E6 4000

Temperature E6 3200 E6 4000 E6 5000 E6 6300[C] % [A] % [A] % [A] % [A]10 100% 3200 100% 4000 100% 5000 100% 630020 100% 3200 100% 4000 100% 5000 100% 630030 100% 3200 100% 4000 100% 5000 100% 630035 100% 3200 100% 4000 100% 5000 100% 630040 100% 3200 100% 4000 100% 5000 100% 630045 100% 3200 100% 4000 100% 5000 100% 630050 100% 3200 100% 4000 99% 4960 95% 601055 100% 3200 99% 3975 97% 4845 91% 572060 100% 3200 99% 3950 95% 4730 86% 543065 100% 3200 98% 3915 92% 4620 82% 514070 100% 3200 97% 3880 90% 4510 77% 4851


47

[A] [% di Iu] [mm2] [% di Iu] [mm2]

E1B08 800 100 1x(60x10) 100 1x(60x10)

E1B12 1250 100 1x(80x10) 100 2x(60x8)

E2N12 1250 100 1x(60x10) 100 1x(60x10)

E2B/N16 1600 100 2x(60x10) 100 2x(60x10)

E2B/N20 2000 100 3x(60x10) 93 3x(60x10)

E2L12 1250 100 1x(60x10) 100 1x(60x10)

E2L16 1600 100 2x(60x10) 100 2x(60x10)

E3S/H12 1250 100 1x(60x10) 100 1x(60x10)

E3S/H16 1600 100 1x(100x10) 100 1x(100x10)

E3S/H20 2000 100 2x(100x10) 100 2x(100x10)

E3N/S/H25 2500 100 2x(100x10) 97 2x(100x10)

E3N/S/H32 3200 95 3x(100x10) 90 3x(100x10)

E3L20 2000 100 2x(100x10) 100 2x(100x10)

E3L25 2500 100 2x(100x10) 95 2x(100x10)

E4H32 3200 100 3x(100x10) 100 3x(100x10)

E4S/H40 4000 95 4x(100x10) 90 6x(60x10)

E6V32 3200 100 3x(100x10) 100 3x(100x10)

E6V40 4000 100 4x(100x10) 100 4x(100x10)

E6H/V50 5000 100 6x(100x10) 97 6x(100x10)

E6H/V63 6300 93 7x(100x10) 6x(100x10)

As an example, the table below shows the referred values ofthe rated uninterrupted current at continuous current-carryingcapacity in a switchboard.

These values a given as an example and refer to apparatus inthe withdrawable version installed in a non-segregated switch-board with IP20 degree of protection.

Vertical Terminals Horizontal and Front Terminals

Type Iu Continuous current- Busbar Continuous current- Busbar carrying capacity cross-section carrying capacity cross-section

The values refer to a maximum temperature on the terminals of120 C.

For circuit-breakers with 6300 A rated current, the use of verti-cal rear terminals is recommended.

48

Altitude H [m]

49

Is [kA]

I2 t [A

2 s x

106

]

Is [kA]

Ip [k

A]GS

EM00

2GS

SC04

22

GSSC

0423

The current-limiting capacity of an automatic current-limitingcircuit-breaker indicates its level of ability to let through or makea current lower than the prospective fault current in short-cir-cuit conditions. This characteristic of an automatic current-lim-iting circuit-breaker is represented by two different curves whichindicate the following respectively:

the value of the specific energy I2t (in A2s) let through bythe circuit-breaker in relation to the uninterrupted symmetri-cal short-circuit current.

the peak value (in kA) of the limited current in relation to theuninterrupted symmetrical short-circuit current.

Current-limiting and specific let-through energycurves for circuit-breakers E2L and E3L

A Icc of limited peakB prospective Icc (peak value)

Current-limiting curvesSpecific let-through energy curves

ls prospective symmetrical short-circuit current

lp peak currentl2t specific let-through energy at the voltages indicated

A curves for maximum peak currents made (limited) at the voltages indicated

B prospective maximum peak current curve (not limited)

51

Overcurrent protection with SACE PR111microprocessor-based releases 52

Trip curves of circuit-breakers withSACE PR111 releases 56

Overcurrent protection with SACE PR112microprocessor-based release 58

Trip curves of circuit-breaker withSACE PR112 releases 62

SACE PR010/K signalling unit 67

SACE PR010/T configuration test unit 68

CONTENTS

Overcurrent releases and relativeaccessories

52

Emax

0351

5 114 9 14 18 17 1910

31 2 6 7 8 12 13 15 16 20

SACE PR111 releaseThis is the basic release for the SACE Emax series. The com-plete range of protection functions and the variety of thresh-olds and trip times offered make it suitable for protecting any

Overcurrent protection with SACE PR111microprocessor-based releases

Caption

1 Alarm signal LED for protection function L

2 DIP switches for setting current threshold I1

3 Indication of the DIP switch positions for the values of currentthresholds I1

4 DIP switches for setting trip time t1 (type of curve)5 Indication of the DIP switch positions for the time settings

6 Alarm signal LED for protection function S



9 DIP switches for setting trip time t2 (type of curve)10 DIP switches for setting inverse time or definite time

characteristic

11 Indication of DIP switch positions for time settings



14 Rating plate showing the rated current of the neutral CT and therelease serial number



17 DIP switches for setting trip time t4 (type of curve)18 Indication of DIP switch positions for time settings

19 Symbol diagram showing operation of function G

20 Connection module with external units for testing the release andsocket for connection to the trip test (SACE TT1 unit and SACEPR010/T unit)

type of alternating current installation. The release does nothave any additional functions over and above its protectionfunctions except some number signals.

53

t = k

GSE

M00

64

GSE

M00

65

t = kI2

Operation and protection functions

Power supplyThe release does not require an external power supply, beingself-powered using the current transformers installed on thecircuit-breaker. For it to operate, it is sufficient for at least onephase to be loaded at 18% of the rated current of the currenttransformers (In).

Protection functionsThe SACE PR111 release offers the following protection func-tions:

overload (L)

selective short-circuit (S)

instantaneous short-circuit (I)

earth fault (G).

See the following section for the range of settings available.

Overload (L)The inverse long time-delay trip overload protection L is of thetype I2t = k. Eight current thresholds and 4 curves indicated bythe letters A, B, C, D are available. Each curve is identified bythe trip time in relation to the current I = 6 x I1 (I1 = thresholdset).

Selective short-circuit (S)The inverse short time-delay trip or definite short time-delaytrip short-circuit protection S can be set with two different typesof curves with a trip time that is independent of the current(t=k) or with a constant specific let-through energy (t = k/I2).

Seven current thresholds and 4 curves indicated by the lettersA, B, C, D are available. Each curve is identified as follows:

for curves (t = k) by the trip time for I > I2

for curves t = k/I2 by the trip time for I = 8 x In (In = ratedcurrent of the current transformer).

The function can be excluded by setting the DIP switches tothe combination indicated by OFF.

Adjustable instantaneous short-circuit (I)Protection function I offers 7 tripping thresholds and can beexcluded (OFF position of the DIP switches).

Earth fault (G)The inverse short time-delay trip earth fault protection G (whichcan be excluded) offers 7 current thresholds and 4 curves in-dicated by the letters A, B, C, D. Each curve is identified bythe time t4 in relation to current I4 as shown in the diagram onthe front of the release (detail 19 on page 52)

54

Emax

0351

Emax

0352

Emax

0353

Emax

0413

Overcurrent protection with SACE PR111microprocessor-based release

Interface with theuserThe user communicates withthe release in the trip param-eter preparation stage bymeans of the dip switchesdescribed in the previousparagraph.

Two LEDs (detail 1 and 6 onpage 52) are also availablefor alarm signalling (start oftiming) for the L and S func-tions respectively.

Setting neutralProtection of the neutral isavailable at 50% in the stand-ard version or at 100% (ver-sion which can be suppliedon request for E1-E2-E3) ofthe rated current and of thephases.

Test functionThe Test function is carriedout by means of the pocket-sized SACE TT1 Trip Test unit,fitted with a two-pole polar-ised connector housed onthe bottom of the box, whichallows the device to be con-nected to the TEST inputsocket on the front of SACEPR111/P releases.

The SACE TT1 unit allows theSACE PR111/P release trip tobe checked and the openingsolenoid trip test.

The device is supplied bymeans of a 12V replaceablebattery.

A complete test of the SACEPR111/P microprocessor-based electronic release canbe carried out using the spe-cial SACE PR010/T appara-tus by applying it to the TESTconnector.

All the release functions canbe checked by means of thisunit.

Versions availableThe versions available are as follows:

55

Mini

0351

Function Current thresholds Trip time Can be excluded Relationt = f (I)

Overload I1 = 0.4 x In With current NO t = k/I2protection 0.5 x In I = 6 x I1:

0.6 x In t1 = 3 s (curve A)0.7 x In 6 s (curve B)0.8 x In 12 s (curve C)0.9 x In 18 s (curve D)0.95 x In1 x In

Selective I2 = 1 x In With current YES t = k/I2 (time-current curves I2t ON)short-circuit 2 x In I = 8 x Inprotection 3 x In t2 = 0.05 s (curve A)

4 x In 0.10 s (curve B)6 x In 0.25 s (curve C)8 x In 0.5 s (curve D)10 x In

I2 = 1 x In With current YES t = k (time-current curves I2t OFF)2 x In I > I23 x In t2 = 0.05 s (curve A)4 x In 0.10 s (curve B)6 x In 0.25 s (curve C)8 x In 0.5 s (curve D)10 x In

Instantaneous I3 = 1.5 x In Instantaneous YES t = kshort-circuit 2 x In tripprotection 4 x In

6 x In8 x In10 x In12 x In

Earth I4 = 0.2 x In With current I = 4 x I4 YES t = k/I2fault 0.3 x In t4 = 0.1 s (curve A)protection 0.4 x In 0.2 s (curve B)

0.6 x In 0.4 s (curve C)0.8 x In 0.8 s (curve D)0.9 x In1 x In

Protection functions and setting values of the SACE PR111 release

56

1

2

5

10

2030

0.01

0.02

0.04

0.06

0.1

0.2

0.4

20

0.6

1

2

4

6

10

20

40

60

102

2

4

6

103

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.91 21.2 1.5 3 4 5 6 7 8 9 10 12 15 20 25

D

C

B

A

0.70.6

0.5 0.8

0.4

1

A

B

CD

0.9

0.95

1.5 2 4 6 8 10 12

OSE

M00

106

OSE

M01

07

1

2

5

10

2030

0.01

0.02

0.04

0.06

0.1

0.2

0.4

20

0.6

1

2

4

6

10

20

40

60

102

2

4

6

103

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.91 21.2 1.5 3 4 5 6 7 8 9 10 12 15 20 25

I2t

ON

1

2 3 4 6 8 10

D

C

B

A

0.9

0.95

0.70.6

0.5 0.8

0.4

1.5 2 4 6 8 10 12

D

C

B

A

1

A

B

CD

t = KI2

Trip curves of circuit-breakers with SACE PR111 releases

Trip thresholdtolerancesL = release between

1.05 and 1.3 I1 (inconformity with IEC947-2 standards)

S = 10%;I = 20%;

Trip timetolerancesL = 10% ( 20% per

l>2 x ln);

S = 20%;I = 20%;

Captionln = Rated current of

current transformers

t = trip time

57

1

2

5

10

2030

0.01

0.02

0.04

0.06

0.1

0.2

0.4

20

0.6

1

2

4

6

10

20

40

60

102

2

4

6

103

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.91 21.2 1.5 3 4 5 6 7 8 9 10 12 15 20 25

0.2 0.3 0.4 0.6 0.8

0.9

1

D

C

B

A

1

2

5

10

2030

0.01

0.02

0.04

0.06

0.1

0.2

0.4

20

0.6

1

2

4

6

10

20

40

60

102

2

4

6

103

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.91 21.2 1.5 3 4 5 6 7 8 9 10 12 15 20 25

I

OFF

1

2 3 4 6 8 10

D

C

B

A

0.9

0.95

0.70.6

0.5 0.8

0.4

1.5 2 4 6 8 10 12

D

C

B

A

1

A

B

C

D

t = K

OSE

M00

108

OSE

M01

09


1.05 and 1.3 I1 (inconformity with IEC947-2 standards)

S = 10%;I = 20%;

G = 20%

Trip timetolerancesL = 10% ( 20% per

l>2 x ln);

S = 20%;I = 20%;

G = 20%


currenttransformers

t = trip time

58

Emax

0350

7 6 4 1

98 10 1411 12 13

35 2


SACE PR112 releaseThe SACE PR112 release is a sophisticated protection systemusing microprocessor technology. It comprises the SACEPR112/P protection unit and, on request, a dialogue unit. Inthis case it takes the code SACE PR112/PD.

The wide range of settings makes this protection unit ideal forgeneral use in any type of installation.

Consulting information and programming is extremely easy us-ing a keyboard and alphanumeric liquid crystal display.

An ammeter function and many additional functions are pro-vided over and above the protection functions. These addi-tional functions can be increased still further with the additionof the dialogue and signalling unit.

Caption

1 Programming keys (for selecting parameters)2 Liquid crystal display

3 Rating plate indicating the rated current of the CT and neutralplus the release serial number

4 Test pushbutton (TEST)5 Magnetic signalling devices showing protection functions

L, S, I, G tripped

6 Magnetic signalling device showing excessive release casetemperature rise (second threshold)

7 Key for resetting the magnetic signalling devices and protectiondevice tripped signalling contact (RESET)

8 Key-operated selector switch for choosing read only mode(READ) or setting mode (EDIT) for the parameters

9 Microprocessor fault LED signalling device

10 Auxiliary power supply LED signalling device

11 LED signalling devices showing communication in progressbetween dialogue unit and control centre.Not available for SACE PR112/P

12 Pre-alarm signalling device (dedicated message on display)13 Alarm signalling device (dedicated message on display)14 Connector for connecting to external units such as SACE

PR110/B and SACE PR010/T (additional functions).

59

GSE

M00

73

GSE

M00

74

t

I

t

I

t = kI2

t = k

t = kI2

t = k

Operation, protection functions and self-test

All the thresholds and trip curve delays of the protection func-tions are stored in special memories which retain the informa-tion even if no power is supplied.

Protection functionsThe SACE PR112 release offers the following protection func-tions:

overload (L)

selective short-circuit (S)

instantaneous short-circuit (I)

earth fault (G). (Residual or Source ground return) by meansof a toroid installed on the earthing connection of the mainpower supply.

self-protection against excessive temperature rises.

Neutral adjustmentThe neutral protection is 50% of the value set for the phaseprotection in the standard version. A version with the neutralprotection set to 100% is available on request (for E1, E2 andE3 only).

Power supplyThe SACE PR112 release does not normally require any exter-nal power supplies, being self-powered from the current trans-formers (CT). For the protection and ammeter functions to op-erate, it is sufficient for at least one phase to have a currentload equivalent to 35% of the rated current of the CTs (20% incases where two phases are powered). The unit ensures fulloperation with self-powering, but by supplying an auxiliarypower supply between 18 and 36 Vdc or between 18 and 25Vac, the unit can also be used with the circuit-breaker open orwith the circuit-breaker closed, but with a single-phase cur-rent load of less than 35% of the rated current of the CTs.

It is also possible to use an auxiliary power supply providedby the PR110/B portable battery unit (always supplied) whichallows the protection functions to be set when the circuit-breaker is not self-powered.

A wide range of setting options is available for the thresholdsand trip times of all the functions.

Functions S and G can operate with a time delay that is inde-pendent of the current (t = k) or with an inverse time delay(constant specific let-through energy: I2t = k), as required.

Protection against earth faults can also be obtained by con-necting the SACE PR112 to an external toroid located on theconductor which connects the transformer star centre to earth(homopolar toroid).

60

Min

i035

0


Notes:(1) 21 thresholds can be selected, i.e.: I2 = 0.6-0.8-1-1.5-2-2.5-3-3.5-4-4.5-5-5.5-6-6.5-7-7.5-8-8.5-9-9.5-10 x In(2) 15 thresholds can be selected, i.e.: I3 = 1.5-2-3-4-5-6-7-8-9-10-11-12-13-14-15 x In.

Function Limit Threshold Trip time Can be Relation Thermal Zonevalues steps adjustment (s) excluded t = f (I) memory selectivity

Overload I1 = 0,01xIn (With current I = 3xI1) NO t = k/I2 YES NOprotection 0.41xIn t1 = 3-6-12-24-36-48-72- (can be

108-144 excluded)

Selective I2 = (1) t2 = 0-0.05-0.07-0.1-0.14- YES t = k NO YES (can beshort-circuit 0.610 xIn 0.20-0.21-0.25-0.28- excluded)protection 0.30-0.35-0.40-0.50-

0.60-0.70-0.75

I2 = (1) (With current I=10xIn) YES t = k/I2 YES NO0.610 xIn t2 = 0.05-0.07-0.1-0.14- (can be

0.20-0.21-0.25-0.28- excluded)0.30-0.35-0.40-0.50-0.60-0.70-0.75

Instantaneous I3 = (2) Instantaneous YES t = k NO NOshort- 1.515 xIn tripcircuitprotection

Earth I4 = 0.02xIn t4= 0.1-0.2-0.3-0.4-0.5-0.6- YES t = k NO YES (can befault 0.21xIn 0.7-0.8-0.9-1 excluded)protection

I4 = 0.02xIn t4= 0.1-0.2-0.3-0.4-0.5-0.6- YES t = k/I2 NO NO0.21xIn 0.7-0.8-0.9-1

Protection functions and setting values of the SACE PR112 release

61

Emax

0350

x

4 14

In case of a temporary or continuous malfunction, the follow-ing two signals are activated:

lighting up of the P Fault LED (when the SACE PR112/PDunit is present, the P Communication Fault LED also lightsup)

when there is auxiliary power supply, closure of the P Faultcontact.

Test functionsFollowing enabling on the control menu, the TESTpushbutton on the front of the release (detail 4) allows correctoperation of the chain consisting of the microprocessor, open-ing solenoid and circuit-breaker to be checked.

Within the control menu there is also the possibility of testingcorrect operation of the display, signalling LEDs, magnetic sig-nals and electrical contacts supplied in all the versions of thePR112 release.

By means of the front multi-pin connector (detail 14), it is pos-sible to apply a Test unit called SACE PR010/T which allowsthe functions of the SACE PR111 and PR112 releases to betested and checked.

Protection against excessive temperatureThe range of SACE PR112 releases allows the presence ofabnormal temperatures which could cause temporary or con-tinuous malfunctions of the microprocessor to be signalled tothe user.

The user has the following signals or commands available:

lighting up of the Warning LED when the temperature ishigher than 70 C (temperature at which the microprocessoris still able to operate correctly)

lighting up of the Emergency LED when the temperatureis higher than 85 C (temperature above which the micro-processor can no longer guarantee correct operation) and,when decided during the unit configuration stage, simulta-neous opening of the circuit-breaker with change-over ofthe relative magnetic signal.

Microprocessor self-diagnosisThe range of SACE PR112 releases contains an electronic cir-cuit which checks operation of the microprocessor of the pro-tection unit in real time (an additional electronic circuit is pro-vided for the PR112/PD unit for checking the microprocessorof the dialogue unit).

62

1

2

5

10

2030

0.01

0.02

0.04

0.06

0.1

0.2

0.4

20

0.6

1

2

4

6

10

20

40

60

102

2

4

6

103

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.91 21.2 1.5 3 4 5 6 7 8 9 10 12 15 20

t=k/I2

1.5 2 3 4 5 6 7 1080.4 0.6 1

2 3 4 5 6 7 8 10 12 151.5

0,7 0,80,91 1,2 1,5 3 4 5 6 7 8 9 10 12 15 20

1

2

5

10

2030

0.01

0.02

0.04

0.06

0.1

0.2

0.4

20

0.6

1

2

4

6

10

20

40

60

102

2

4

6

103

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.91 21.2

1.5 2 3 4 5 6 7 1080.5

t = k

1

15121087654321.5

0.4

GSE

M00

110

GSE

M01

11


1.05 and 1.3 I1 (inconformity withIEC 947-2standards)

S = 10%;I = 15%;

Trip timetolerancesL = 10% ( 20% for

l>2 x ln);

S = 20%;I = 20%;


currenttransformers.

t = trip time.

Trip curves of circuit-breakers with SACE PR112 release

63

1

2

5

10

2030

0.01

0.02

0.04

0.06

0.1

0.2

0.4

20

0.6

1

2

4

6

10

20

40

60

102

2

4

6

103

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.91 21.2 1.5 3 4 5 6 7 8 9 10 12 15 20

t=k/I2

t = k

0.2 0.3 0.4 0.5 0.7

0.70.50.40.30.2 1

1

GSE

M00

112

Trip thresholdtolerancesG = 15%;

Trip timetolerancesG = 20%;


currenttransformers.

t = trip time.

64

Emax

0368

a


CommunicationThe SACE PR112 release with dialogue unit (PR112/PD) is ableto communicate with a monitoring and control system usingtwo different communication protocols: ABB Insum and LON.

Reception and transmission of informationThe SACE PR112/PD release is able to receive the openingand closing commands from the system and to actuate themusing the opening and closing releases. Furthermore, it alsoreceives and stores the unit configuration and programmingparameters: the protection function current thresholds; the protection function curves; the unit configuration parameters.

Note:While the communication parameters are necessary for remote operation,they can only be programmed locally.

All the information can be consulted both locally and using thesupervision system.

The SACE PR112 release fitted with dialogue unit is able totransmit the following information on the state of the circuit-breaker remotely:

protection parameters set

setting of the neutral protection (50% or 100%)

configuration setting

current values on the three phases, on the neutral and onthe PE conductor

state of the circuit-breaker (open/closed)

circuit-breaker condition connected/test/withdrawn

state of the operating mechanism springs (charged/dis-charged)

contact wear

number of circuit-breaker mechanical operations

last interrupted current

state of protection functions

size of current transformers

READ/EDIT key position and request for local control.

Event marking and storage function (with LONinterface only)The SACE PR112/PD release keeps its time base synchronisedwith the absolute system time. Thanks to the availability of theabsolute time, it is possible to time mark the events that occurin the circuit-breaker and in the SACE PR112 release itself. Bycollecting any such events which occur in the various devices

installed in the system, the supervision and control system canprocess a list of events that is important for control and analysisof the installation. Such an analysis can, for example, be par-ticularly useful for tracing the causes of a fault.

Events detected and time-marked:

all protection events;

all WARNING and ALARM signals;

all READ / EDIT change-overs;

all opening and closing operations.

The above information is stored locally (PR112/PD) and madeavailable to the supervision and control system.

Note:The function described is available when the LON communication protocolis being used. When the ABB Insum protocol is being used, it is onlypossible to send the above information to the central supervision andcontrol system.

Function for storing state informationWhen an auxiliary power supply is provided, the SACE PR112release is able to store the following information in a volatilememory, making it available for consultation:

information/data subsequent to last protection trip (currentsinterrupted, type of fault, etc.);

number of operations performed by the unit;

contact wear;

excessive temperature rise causing the circuit-breaker toopen.

This information can be read locally or sent by remote transfer.

65

Emax

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7

9 10 11

A further four LEDs (9, 10, 11) signal the following:

P Fault: indicates that the protection unit microprocessorhas a temporary (lit for a limited time) or permanent (lit for anunlimited time) fault

Vaux: indicates there is an auxiliary power supply

Communication NETWORK: indicates the communicationactivity between the dialogue unit and the remote supervi-sion unit

Communication P Fault: indicates that the communica-tion unit microprocessor has a temporary (lit for a limitedtime) or permanent (lit for an unlimited time) fault

Electrical signalling contactsThree clean contacts provided on all versions of the SACEPR112 release enable electrical signalling of the following:

(5 A / 240 V ac) overload alarm (I1>90%);

(0.5 A / 125 V ac) relay tripped (closes following tripping ofany of the protection functions - L, S, I, G and excessivetemperature rise);

microprocessor fault (can be used to directly close the cir-cuit which powers the circuit-breaker shunt opening release).

Note:The overload and microprocessor fault contacts to the microcontroller areavailable with an external auxiliary power supply.

User interfaceFour pushbuttons and an enabling key with two positions(READ and EDIT) are used to consult the information avail-able and the parameters set in the memory of the SACE PR112(READ mode) or to program and configure the unit (EDITmode) - all the choices are made using step-by-step menus.

Indication LEDsTwo LEDs on the front panel of the release are used to indicatepre-alarms (WARNING) and alarms (ALARM). A messageon the display always explicitly indicates the type of eventconcerned.

Events indicated by the WARNING LED:

unbalance between phases; pre-alarm for overload (I1>90%);

first temperature threshold exceeded (70 C);

distorted waveform; zone selectivity enabled and no Vaux;

contact wear exceeds 80%.

Events indicated by EMERGENCY LED:

overload (I>105% I1), function L under timing; function S under timing;

function G under timing;

second temperature threshold exceeded (85 C); contact wear 100%.

66

Emax

0375

Resetting trip signalsThe RESET pushbutton (detail 7 on page 65) allows localresetting of the protection trip signals (relay tripped contactand magnetic flags).

In the case of remote control, the resetting signal for the pro-tection trip signals can be transmitted by means of a dialogueunit (PR112/PD version) only for relay trip caused by exces-sive temperature and by overload (L). Resetting the trip sig-nals for the other functions (S, I and G) can only be carried outlocally. When the signal is not reset, actuation of the circuit-breaker closing command by the dialogue unit is prevented.

Load controlAccording to the relative trip threshold setting for overload (I1),the SACE PR112 unit allows two trip thresholds to be defined(fraction of I1) which, by using the SACE PR010/K signallingunit, can enable two clean contacts with electrical character-istics which allow one shunt closing or opening release of thecircuit-breaker to be piloted for any power supply voltage value.

These contacts make various applications possible, amongwhich load control, alarms, signals and electrical interlocks.

Within the sphere of load control, there are two possible con-figurations which can be selected by the user during the SACEPR112 parametrisation stage:

disconnection of two loads

connection and disconnection of a load

Measuring functionThe current measuring function (ammeter) is present on allversions of the SACE PR112 unit.

The display shows the currents of the three phases, of the neu-tral and of the earth fault.

The latter current value takes on two different meanings de-pending on whether the external toroidal transformer for theSource Ground Return function or the internal transformer(residual type) is connected.

The ammeter can operate either with self-supply or with auxil-iary power supply voltage.

Accuracy of the ammeter measuring chain (current transformer

plus ammeter) in the 30% - 120% current range of In comesunder class 5.

Versions available PR112/P (LSI)

PR112/P (LSIG)

PR112/PD (LSI)

PR112/PD (LSIG)


SACE PR110/B power supply accessoryThis accessory always supplied with the range of SACEPR112 releases makes it possible to read and configure theparameters of the unit whatever the state of the circuit-breaker(open-closed, in the test or connected position, with/withoutauxiliary power supply).

Inside it there is an electronic circuit which allows power sup-ply to the unit for about 3 h continuously to carry out just thereadout and data configuration operations.

Autonomy decreases proportionally to use if the PR110/B ac-cessory is also used to carry out the COMMAND menu func-tions (Trip test, Auto test, CB closing (*), CB opening (*)).

(*) only with SACE PR112/PD version

67

Emax

0376

The SACE PR010/K signalling unit is able to convert the digitalsignals supplied by the SACE PR112 unit (both in the P andPD version, with LSI or LSIG protection functions) into electri-cal signals by means of normally open electrical contacts.

An auxiliary power supply with a voltage stabilised at 24V d.c.(20% with maximum ripple 5%) and insulated from earth isrequired to operate the unit.

It is connected to the Internal Bus of the protection unit bymeans of a dedicated serial line accessible to the user, alongwhich all the information regarding the state of activation ofthe protection functions is transmitted on the basis of whichthe relative power contacts are closed.

The following are available in particular:

contact for signalling overload alarm (circulating currenthigher than 130% of I1)

contact for signalling protection L tripped

contact for signalling protection S tripped

contact for signalling protection I tripped

contact for signalling protection G tripped

contact for signalling second threshold for temperature toohigh exceeded (T>85C)

load control.

SACE PR010/K signalling unit

In particular, the contact for signalling that the second thresh-old for temperature too high has been exceeded can beconfigured by means of a dip switch on the unit, allowing sig-nalling no connection with the Internal Bus as an alternative.

Two contacts available on the SACE PR010/K unit (load con-trol) allow a circuit-breaker shunt opening or closing release tobe piloted whatever the power supply voltage of the release.These contacts make various applications possible, amongwhich load control, alarms, signals and electrical interlocks.

The alarm signal remains active for the whole duration of theoverload until eventual trip of the release.

The signals for protection trips remain active during the timingphase and stay like this even after the release trip.

A Reset pushbutton allows the state of all the signals to bereset.

There are also two LEDs available on the unit for visual signal-ling of the following information:

power ON: auxiliary power supply present

TX (Int BUS): flashing synchronised with communicationactivity with the Internal Bus

The table below shows the characteristics of the signallingrelays available on the SACE PR010/K unit.

Characteristics of the signalling relays

Auxiliary power supply 24 V c.c. 20%Maximum ripple 5%

Maximum interrupted current 5 A

Maximum interrupted voltage 250 V c.a. / 130 V c.c.

Resistive load breaking -capacity 50 W / 800 VA (48 V c.c. / 220 V c.a.)

Inductive load breakingcapacity 25 W / 500 VA (48 V c.c./ 220 V c.a.)

Contact/contact insulation 1000 V eff

Contact/coil insulation 2000 V eff

68

Emax

0378

SACE PR010/TTest and Configuration Unit

The SACE PR010/T unit is an instrument able to carry out theTest, programming and parameter readout functions for theprotection units which are fitted with SACE Emax low voltageair circuit-breakers.

In particular, the Test function regards the following units:

SACE PR112 (in all versions)

SACE PR111 (in all versions)

whereas the programming and parameter readout functionsregard the SACE PR112 range of releases.

All the functions mentioned can be carried out ON BOARD byconnecting the SACE PR010/T unit to the front multi-pin con-nector on the various protection units. Connection is ensuredby special interfacing cables supplied as standard with theun

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