630 amps short circuit test

CPRI

TEST REPORT

Central Power Research Institute(A Govt. of India Society)

P.B.No. 8066, Sadashivanagar Post Office,Sir C.V. Raman Road,

Bangalore - 560 080 (INDIA)

CENTRAL POWER RESEARCH INSTITUTE(Member of STL)

Other than customer's representatives

Test subcontracted withaddress of the laboratory

Documents constituting this report (In words)Number of sheets FourNumber of oscillograms OneNumber of graphs NilNumber of photos FourNumber of test circuit diagrams OneNumber of drawings Ten

~Test Engineer

Test Report Number

Name & Address of the Customer

Name & Address of the Manufacturer

Particulars of sample tested

Condition of the sample on Receipt

TypeDesignationSerial Number (s)Number of samples testedDate (s) of test (s)CPRI sample code no(s).

Particulars of tests conductedTest in accordance withStandard / specification

Sampling planCustomer's requirementDeviations if any

Name of the witnessing persons

Customer's representative

CPRI

TEST REPORT

SC12491A Dated: 22nd November, 2012

M/s. Bharat Heavy Electricals Limited,Electra Porcelains Division, Opp IISc,Bangalore - 560 012.

M/s. Bharat Heavy Electricals Limited,Electra Porcelains Division, Opp IISc,Bangalore - 560012.

Low-voltage switchgear and contralgear assembly-415 V 630 A LT ACB & MCC Panels

Good

Indoor/Outdoor, Draw out

TYLT/1Ones" October, 2012DCCDHRT12S0068

Verification of the short-circuit withstand strength

Sub-clause 8.2.3 of IS 8623 (Part 1):1993/IEC Pub 439-1 (1985) (Reaffirmed 2004)Not applicable50 kA rms for 1.0 s & 105 kA peak on phase bus-barsNone

Mr. Rajkumar Pradhan - Engineer &Mr. Lakshmeesha, Sr. Addl. Engineer, Grade - INone

None

~(Swaraj Kumar Das)Joint Director

Sheet 1 of 4


CPRI

Test Report Number: SC12491A Dated: 22nd November, 2012

Description of sample tested (ratings as assigned by the manufacturer)

Test sample Low-voltage switchgear and controlgear assembly -LT ACB & MCC Panels

Type

Designation

Serial number

Rated voltage

Rated insulation voltage

Rated current

Rated frequency

Number of phases

Switching device detailsIncoming circuit

Indoor/Outdoor, Draw out

TYLT/1

415 V

660 V

630A

50 Hz

Three & neutral

ACB: 415 V, 800 A, 50/60 HzMake: L&T, Model :CN-CS 800C,Serial No : CV500678

Rated short-time withstand current& peak withstand current 50 kA rms for 1.0 s & 105 kA peak on phase bus-bars

30 kA rms for 1.0 s & 63 kA peak on neutral bus-bar

Oscillogram number(s)

Photo number(s)

Documents attached to this reportSC12491A.S001

SC12491A.PB1, SC12491A.PA1, SC12491A.PA2 &SC12491A.PA3

CRTLlSC/STC-04A

EPD-0630A-001 SHEET 1 OF 4 REV 00,EPD-0630A-001 SHEET 2 OF 4 REV 00,EPD-0630A-001 SHEET 3 OF 4 REV 00,EPD-0630A-001 SHEET 4 OF 4 REV 00,NO 50090 REV 00, NO 52002 REV 00, NO 52073 REV 00,NO 52094 REV 00, NO 52070 REV 00 & NO 52001 REV 00

Test circuit diagram number(s)

Drawing number(s)

Sheet 2 of 4

es on: e rea an onzon a PI ase us- ars 0 e pane InCu InQOscillogram Current (kA) Duration AmbientNumber

Peak(s) Temperature Observations

rms (QC)

R - 39.74During test: Flash overnoticed

SC12491A.S001109.47 Y-51.11 0.285* 28(B-phase) B - 39.92 After test: *

(4th cycle)


Test Report Number: SC12491ACPRI

Dated: 22nd November, 2012

SCHEDULE OF TESTS

VERIFICATION OF THE SHORT-CIRCUIT WITHSTAND STRENGTH (SUB-CLAUSE8.2.3)

TEST CONDITIONSSourcePhaseTest on phase bus-barsTest on neutral bus-bar

FrequencyTest sampleCondition before test

Short-circuit generator

ThreeSingle50 Hz

Body/Enclosure

In clean and good condition; incoming terminals (1F) connectedto source with ACB in circuit, ACB operable on no-load.2 mm thick MS sheet; isolated from earth and connected to thesource neutral through a fine-wire fuse (FWF) of diameter 0.1mm and length 50 mm in series with a 2.0 Ohms resistor.

Test detailsTest circuit drawing numberTest on phase bus-bars

Short-circuit appliedShort-circuit point

CRTLlSC/STC-04AOn the end of the vertical bus-bars(3F)Grounded

T tTest results

b b f th I I d ACBv rti I d H t I h

* Osilloqrarn shows open circuit In R-phase after 0.285 s & arcing In R-phase voltage. Further testdiscontinued

Physical InspectionBus-barsSupportsACB draw - out finger contacts

: Slight deformation noticed in 'B' & 'V' phases.: Intact: 'R' phase contacts melted(refer photograph no.SC12491.PA1 & SC12491.PA2)

Remarks: The sample tested does not comply complies with sub-clause of the standard referred to.

~

Sheet 3 of 4


CPRI

Test Report Number: SC12491A Dated: 22nd November, 2012

NOTE

a) The Test results relate only to the item(s) tested.b) Publication or reproduction of this report in any form other than by complete set of the

whole test report / Certificate and in the language written is not permitted without the writtenconsent of CPRI.

c) Any Corrections / erasure invalidate the test ReporUCertificate.d) NABL has Accredited this laboratory as per ISO 17025-2005 standard, vide

certificate no.T-0010 for the tests carried out.e) Any anomaly / discrepancy in the test report / Certificate should be brought to notice of CPRI

within 45 days from the date of issue.

Additional Information:This is not a certificate of rating. A certificate of rating is not issued as only limitedtests as requested by the customer were carried out.

CPRI issues following types of reports/certificates:

Test Report:The test report contains the record of the values of test parameters as obtained duringtesting, the physical condition of the sample during / after the test(s) and copy ofoscillogram(s). Test report is issued when partial tests are performed as against thecomplete test requirement for proving specific ratings.

Sealed Certificate:The sealed certificate is issued, on request and payment of the prescribed charges thereofonly when the sample of particular type and rating has satisfactorily passed all the specifiedtests in compliance with the condition stipulated in a published National/Internationalstandard.

CPRI issues the following type test certificates based generally on STL Guidelines:

I. Type test certificate of Short Circuit Performance.11. Type test certificate of Switching Performance.Ill. Type test certificate of Temperature Rise Performance.IV. Type test certificate of Dielectric Performance.V. Type test certificate of complete type test.

Sheet 4 of 4

r )

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-152530

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-530150

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-150521

>0 0.0

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-521

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I , I I ro 250 500 750 1000 mS

~ SC12491A.S001 Date: 05-0ct-2012


CPRI

Mounting arrangement (Before test)

SC12491A.PB1


CPRI

Condition of the sample (After test)

SC12491A.PA1

SHORT-CIRCUIT LABORATORYPS NO 8066, SADASHIVANAGAR POST OFFICE

SIR CV RAMAN ROAD, BANGALORE - 560 080 (INDIA)Phone: +~ (0) 80 - 23602662 Fax: +91 (0) 80 - 23601213



SC12491A.PA2

CPRI


CPRI


SC12491A.PA3

SHORT-CIRCUIT LABORATORYPB NO.8066, SADASHIVANAGAR POST OFFICE

SIR cv. RAMAN ROAD, BANGALORE - 560 080 (INDIA)Phone: +91 (O} 80 - 23602662 Fax: +91 (0) 80 - 23601213

CPRI

Schematic of main & measurement circuits - Three phase testCircuit Number: CRTUSC/STC-04A

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CUSTOMER M/s. RAICHUR POWER CORPORATION LTDPROJECT 2X800MW YERAMARAS STPP.

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b) SINGLE PHASE TEST THROUGH NEUTRAL & NEAREST

PHASE FOR 30KA rms FOR 1Sec. WITH 63KA PEAK

1. ALL DIMENSIONS ARE IN mm.________ 2.

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PANELS ARE MADE OF 2 mm. THICK CRCA SHEET.

RATING OF HORIZONTAL BUS - 600A. TPN.

RATING OF VERTICAL BUS IN MCC - 600A. TPN.

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BUSBAR ASSEMBLY AT SUPPORT(FOR VBB OF MCC)

CUSTOMER M/s. RAICHUR POWER CORPORATION LTDPROJECT 2X800MW YERAMARAS STPP.

DRN IPRADHAN I I ~ BHARAT HEAVY RfCTIIICALS lNTED~ ~ I:U:CTRO PORCElAINS IlIVISION.8ANGAlORE

~ I APPDI K S B I I TITLE:ARRANGEMENT OF 630A ACB & MCC PANELS FOR-- - - -- - -- JOB No: 6318 SHORT CIRCUIT TEST.

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