Testes Transformadores Auxiiares PEC90. . .BB0050.E

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Project name CTE 720 MW UTE PECEM

PO no. 7500013313

Requisition no. & Issue M006-NN-MR-21-IS02

Doc. titleINSPECTION TESTS LIST ANDPROCEDURE (IN WORKSHOP)

Issue no Issue date 02 24 / 03 / 2010

Equipment name DRY POWER TRANSFORMERS

Equipment ID no. / Tag no.

10BFT01 to 10BFT06

20BFT01 to 20BFT0690BHT01 to 90BHT05

Client / End user doc. no.

CREA Number

02 Revised According To Comments Walmir Arago Roberto 24/03/2010

01 First Issue Walmir Arago Roberto 25/02/2010

ISSUE DESCRIPTION ISSUED BY CHECKED APPROVED DATE

ContractorID.Code / _Is. M006-NN-VD-021-0021

Doc. Status

Code

Checked /

Signature

Department Date

Doc. Status Code:1 Accepted 2 Accepted as noted 3 Not acceptedMabes acceptance of this document does in no way relieve the supplier of hiscontractual obligations.

This document is MABEs property, and cannot be used by others for any purpose, without prior written consent

REVIEWED WITH COMMENTS

The document shall be completed with recommended tests to be performed

at site after erection and before voltage application


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ZILMER INELTEC CONSTRUES ELTRICAS LTDA.Rua So Joo Clmaco, 315 - So Joo Clmaco - So Paulo - SP - CEP 04255-000

PABX (011) 2148-7121 / Fax (011) 2148-7111

[email protected] /www.zilmer.com.br

PLAN INSPECTIONS AND TESTS

LOW VOLTAGE DRY TRANSFORMERS - MODEL TAM

ITENS STANDARD

1. ROUTINE TESTS

1.1. Material and accessories reports Aplicable standards

1.2. Visual inspection Approved drawings

1.3. Painting check (color and thickness), where applicable Painting procedure

1.4. Dimensional inspection Approved drawings

1.5. Insulation resistance measurement between windings and eachwindings and earth 2,5 kV for 60

1.6. Measurement of winding resistance IEC 60076-1Par.10.2

1.7. Measurement of voltage ratio and check of phase displacement IEC 60076-1Par.10.3

1.8. Measurement of short-circuit impedance and load loss IEC 60076-1Par.10.4

1.9. Measurement of no-load loss and current IEC 60076-1Par.10.5

1.10.Separate-source voltage withstand test IEC 60076-11 Par.19IEC 60076-3 Par.11

1.11.Induced AC withstand voltage test IEC 60076-11 Par.20IEC 60076-3 Par.12.2.1

1.12.Partial discharge Measurement

IEC 60076-11 Par. 22IEC 60270

IEC 60076-3 Ann. A

1.13.Measurement of sound level IEC 60076-10

1.14.Operation accessories check Approved drawings

2. TYPE TESTS (PERFORMED ON ONE SAMPLE EACH RATING)

2.1. Lighting impulse test: full waveIEC 60076-11 Par.21IEC 60076-3 Par.13

2.2. Temperature rise testIEC 60072-11 Par.23

IEC 60076-2

3. SPECIAL TESTS

3.1. Measurement of the harmonics on the no-load current IEC 60076-1

4. REPORT OF TESTS

Elaborate by: Walmir Pazini Date: 25/03/2010.



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Code Review Date Page

PQZ - 010 2 25/03/2010 1 de 7

This document is the property of Zilmer Ineltec Construction Electrical Ltda., Reproduction is prohibited without our prior permission.Copy valid only in electronic format. Printed copies of this document are only valid with the stamp "Copy Controlled".

FINAL TESTING OFTRANSFORMERS

PROCEDURE

RECORD REVIEWS:

2 25/03/2010 Revised According To Comments Walmir Arago

1 24/02/2010 First Issue Walmir Arago

Rev. Date Description Issued By Approved



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1. OBJECTIVEThis policy document provides a systematic method for conducting the tests carried out withelectrical transformers, describing the sequence of activities and issuing the reports apply.

2. ADDITIONAL DOCUMENTS2.1. PQZ - 001 Control of Non Conformities and Non Conforming Products

2.2. IEC 60076-1

2.3. IEC 60076-11

2.4. IEC 60076-3

2.5. IEC 60270

2.6. IEC 60076-10

3. DEFINITIONS3.1. Not applicable

4. RESPONSIBILITIES

4.1. Sector Electrical Testinga) Testing the electrical equipment manufactured and preparation of reports;b) Maintain equipment properly identified as to the status of inspection and testing;c) Notify the Quality Control non conformities occurred;

4.2. Sector Engineeringa) Check and approve test reports carried out electrical;

b) Check the values obtained for the test, the guaranteed values (where applicable).

4.3. Generala) For the tests described in this procedure, the measuring instruments and tests used must be

calibrated as the Program Calibration Instruments.b) Where non-compliances must be requested from Quality Control to issue a RNC - Non

Conformity report according with PQZ - 001 Control of Non Conformities and Non ConformingProducts.

c) During the execution of tests, access to industry tests should be closed and the transformerunder test properly grounded in order to avoid accidents.

d) The tests required are specified in ODF - Order Manufacturing.e) Type tests should be performed only after the completion of test reports, and compliance.



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5. ROUTINE TESTS

5.1. Insulation resistance (item 1.5)

For this test should be used a Mega-Ohmmeter of at least 1000 V. Shorting to the terminals of

each winding of the transformer under test (H1 H2 H3 and X1 X2 X3) is due to make the followingmeasurements:a) High voltage and low voltage against earth;b) Low voltage from high voltage and earth;c) High voltage low voltage.

The values found and the temperature of the test shall be recorded in the Report.

5.2. Electrical resistance of the windings (item 1.6)

The measurement is performed by the method of the Wheatstone bridge where the windingresistance is less than 1 OHM, it is higher, the measurement of electrical windings is performed bythe method voltmeter, ammeter.

Measurements made:

H1-H2 / H1-H3 / H2-H3 - X1-X2 / X1-X3 / X2-X3

You must record the temperature of the winding.

5.3. Value transformation (item 1.7)

For this test, we use a specially built equipment, which incorporates a variable ratio transformerand an indicator of stress. The range of equipment (TTR) indicates the stress ratio when thevoltage indicator indicates zero deflection.

Measurements made:

H1H3 - X1X0 / H2H1 - X2X0 / H3H2 - X3X0 - for transformer connection with Yo with DYn1.

Using this device, there is also the polarity and the angular displacement.

Note:The first letters of each sequence are the polarities

5.4. Short-circuit impedance and Load losses (item 1.8)

To perform this test, it connects one of the windings of the transformer short-circuit (preferably thelow voltage). Then applied to the other winding, a voltage at rated frequency and amount sufficientto circulate rated current. This is the transformer short-circuit of winding. The drivers used forshort-circuit the transformer section shall be equal to or superior to their terminals and short aspossible. Measurements should be performed as soon as possible, so no elevations in

temperature of the windings, with consequent errors in reading. It is the simultaneous readings ofcurrent, voltage and power absorbed by the transformer short circuit. You must record thetemperature of the winding during the test.



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5.5. No-load loss and excitation current (item 1.9)

The no-load losses and excitation current are measured with voltage transformer, fed, preferablyby low voltage, voltage and rated frequency.

Simultaneously, it is the reading of power and average current, using a Wattmeter, Ammeter andVoltmeter of effective values respectively. It is also the reading of the voltmeter average.

5.6. Applied voltage (item 1.10)

All external terminals of the winding under test shall be connected to the terminal of the test. Allother external terminals of other windings, core and tank must be earthed.

5.7. Voltage induced (item 1.11)

Should be applied to the terminals of the transformer windings, double the rated voltage for 7200cycles with minimum frequency of 120 Hz and up to 480 Hz.

5.8. Partial Discharges (item 1.12)

5.8.1. The measurement of PD should be performed after the execution of all tests dielectrics.

5.8.2. The low voltage winding must be excited by a source or single-phase.

5.8.3. The voltage should be as sinusoidal as possible and frequency should be increasedappropriately, on the face, to avoid excessive excitation current during the test.

5.8.4. For testing three-phase Transformers

Windings for connection to systems solidly grounded or low impedance. Must be induced initiallywith phase to ground voltage equal to (excitation voltage):

Where:A = maximum voltage winding for 10 seconds.

Then, without interruption, decreases the voltage phase to ground equal to (voltage reading):

For 3 minutes, during which it shall be measured the level of PD.

5.8.5. Windings for connection to the isolated or grounded through a high impedance, eg areactor suspension arc. Should be induced initially a two-phase equal to 1.5 A for 30 sec. With aline terminal grounded. Then, without interruption, for phase-phase voltage equal to al, Lum for 3min. they are to be measured the level of P.D.This test should be repeated with another line terminal grounded.

5.9. Test of Noise Level (Item 1.13)

The test of noise level should not exceed the limits specified in the Standards IEC 60076-10.

For the test to measure the level of ambient noise and immediately after you must put the voltagein the windings of the transformer empty.

Always maintaining a distance of 1m., is performed to measure the noise level of the processorand keeping the device perpendicular to the face where you want the reading achievement of dB.



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6. TYPE TESTS

6.1. Lighting Impulse Test: Full Wave (item 2.1)

In conformity with IEC 60076-11 Par.21 and IEC 60076-3 Par.13.

6.2. High Temperature of Windings (item 2.2)

This test is to obtain the temperature of the windings on the temperature of the external cooling,referred to the voltage, current and rated frequency. Should be made for all the windings available.

The test is performed by the method of excitation and load independent losses in order to obtainthe temperature rises of the windings in two independent tests, one with application of load lossesand another with the no-load losses.

Identical procedures - items 5.5. and 5.4., respectively, until reaching the stabilization of thetemperature of the transformer coils (indicated by thermal sensors installed for the test).

After stabilizing the temperature, the transformer is switched off and is immediately performed tomeasure the ohmic resistance of the windings, according to item 5.2, noting the resistance valueand time of each measurement (using as reference the time when the transformer was off).

7. TYPE TESTS

7.1. Measurement of the harmonics on the no-load current (item 3.1)

In conformity with IEC 60076-1.

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Testes Transformadores Auxiiares PEC90. . .BB0050.E

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