capacitors laboratory diagnostic ... - shreem...

CAPACITORS LABORATORY DIAGNOSTIC, CABLES & CAPACITORS DIVISION

CENTRAL POWER RESEARCH INSTITU P.B.NO.8066, SADASHI VAN A G A R S U B P.O

PROF.S IR .C .V .RAMAN R O A D , B A N G A L O R E - 560 080, INDIA Phone: + 91 (0) 80-2360 4435 Fax: 080 - 23601213

CPRI TEST R E P O R T

NABL Accredited Laboratory

Cert.No.T- 0010

Sheet 1 of 13

Test Report Number Name & Address of the customer

Name & Address of the Manufacturer

Particulars of sample tested Condition of sample on Receipt Type Designation Description/Name Plate details

Serial Number Number of samples tested Date(s) of Test(s) CPRI sample code No(s). Particulars of tests conducted

DCCD -12156 dated: 15.07.2011 M/s. Shreem Electric Ltd., Gat No.311, Near Ratnappaanna Kumbhar, Market Yard Gate, Jaysingpur-416 144, Maharashtra Ref.: Letter No. Nil dated 16.04.2011 & Customer Request Form dated 19.04.2011 M/s. Shreem Electric Ltd., Gat No.311, Near Ratnappaanna Kumbhar, Market Yard Gate, Jaysingpur-416 144, Maharashtra L T M P P type capacitor New & Good F T M K P 440.3.25.00 LT M P P type Q N : 25 kvar U N : 4 4 0 V C N : 3 x 137.06 MFD Frequency: 50 Hz No. of phases: 3 Connection: A Temp. Category: - 40/D BIL: 3/15 kV IP: 20 Discharge device: ~" 1

Dielectric: M P P , SH (wavy cut) Impregnant: N P C B (Oil Filled) Over pressure disconnector: Provided Ref: IEC: 60831 Date of Mfg.: 04/2011 Brand: Shreem

SD-001 One 20.04.2011 to 12.07.2011 DCCDCAPL11S0032 The following Routine and Type tests were conducted: A) ROUTINE TESTS: a) Capacitance measurement and output calculation b) Measurement of the tangent of the loss angle

(tan 5) of the capacitor c) Voltage test between terminals d) Voltage test between terminals and container e) Test of the internal discharge device f) Sealing test

(T.BHAVANI SHANKER) TEST ENGINEER

(A.SUDHINDRA) ADDITIONAL DIRECTOR

CPRI


CENTRAL POWER RESEARCH INSTITU P.B.NO.8066, SADASHI VAN A G A R SUB P.O


T E S T R E P O R T


Cert.No.T- 0010

Sheet 2 of 13

Test Report No. DCCD - 12156 Date: 15.07.2011

Test in accordance with Standard/specification Sampling plan Customer's requirement

Deviations if any Name of the witnessing persons Customer's representatives Other than Customer's representatives Test subcontracted with address of the laboratory

Document consisting this report (in words) Number of Sheets Number of oscillogram/s Number of graphs Number of photos Number of test circuit diagrams Number of drawings

B) TYPE TESTS: a) Voltage test between terminals b) Voltage test between terminals and container c) Thermal stability test d) Measurement of the tangent of the loss angle (tan 5) of

the capacitor at elevated temperature e) Self-healing test f) Lightning Impulse Voltage test between terminals and

container g) Discharge test h) Ageing test i) Destruction test As per IEC: 60831-1:2002.-11 -Edition 2.1 & IEC: 60831-2:1995-12 Not applicable

1) All Routine & Type tests as per IEC 60831 2) Tan delta measurements to be carried out without

discharge device Nil

None None

None

Thirteen Two Nil One Nil One, Drawing No.SR-IEC-A4-N016-04-2011/A , Sheet 1 of 1, Rev.O dated 16.04.2011


(A.SUDHINDRA) ADDITIONAL DIRECTOR

CPRI


CENTRAL POWER RESEARCH INSTITU P.B.NO.8066, S A D A S H IVAN A G A R S U B P.O


T E S T R E P O R T


Cert.No.T- 0010

Sheet 3 of 13

Test Report No. DCCD - 12156 Date: 15.07.2011 T E S T R E S U L T S

SI. No. of the sample: SD-001 Capacity: 25 kvar

ROUTINE AND T Y P E T E S T S A S PER IEC : 60831-1:2002-11 -Edition 2.1

& IEC 60831-2:1995-12

A) ROUTINE T E S T S

1. Capacitance Measurement and output calculation (as per CI.7) Ambient: 29°C Frequency: 50Hz

Voltage Applied

(UN)

Measuring connection

Capacitance G*F)

Capacitance tolerance Ratio of maximum to minimum measured value of capacitance

Calculated Output

Voltage Applied

(UN)


Capacitance G*F)

Specified Observed Specified Observed

Calculated Output

440 V ac

Between terminals 1&2 206.92

- 5% to + 10%

+ 0.67% 1.08 (Max.) 1.00 25.16

kvar 440 V ac Between terminals 2&3

206.94 - 5% to + 10%

+ 0.67% 1.08 (Max.) 1.00 25.16

kvar 440 V ac

Between terminals 3&1

207.08

- 5% to + 10%

+ 0.67% 1.08 (Max.) 1.00 25.16

kvar

2. Measurement of tangent of loss angle (tan 5 ) of the capacitor (after voltage test between terminals) (as per CI. 8)

Ambient: 29°C Frequency: 50Hz

Measuring connection Test voltage (UN)

tan 5 (Absolute)

Between terminals 1 & 2 440 Volts ac

0.00039 Between terminals 2 & 3 440 Volts ac 0.00033 Between terminals 3 & 1

440 Volts ac 0.00032




P R O F . S I R . C . V . R A M A N R O A D , B A N G A L O R E - 560 080, INDIA Phone: + 91 (0) 80-2360 4435 Fax: 080 - 23601213

CPRI Test Report No. DCCD - 12156

T E S T R E P O R T

T E S T R E S U L T S

3. Voltage test between terminals (as per CI. 9.1)


Cert.No.T- 0010 Sheet 4 of 13

Date: 15.07.2011

Voltage Applied (Ut = 2.15 U N ac)

Voltage application Duration (Minimum)

Observation

946 V ac

Between terminals 1 & 2 (3 open)

2 seconds No permanent breakdown or flash over occurred

946 V ac Between terminals 2 & 3 (1 open)

2 seconds No permanent breakdown or flash over occurred

946 V ac


2 seconds

No permanent breakdown or flash over occurred

Result: Withstood.

4. Voltage test between terminals and container (as per CI. 10.1)

Measuring connection: ac voltage applied between terminals (joined together) and container of the capacitor.

Ambient temperature: 29°C Voltage Applied Duration Observation

3 kV ac 10 Seconds No flash over or puncture

occurred

Result: Withstood

5. Test for internal discharge device (as per CI.11 & 22)

The self-discharging rate of discharge device of the capacitor was measured by charging the capacitor to a voltage of 623 kV dc (V2 U N dc) and measuring the time taken by the discharge device from peak voltage to 75V dc.

Discharge time measured are given below: Voltage Applied

(V2 U N dc)

Between Terminals

Discharge time Measured

Specified time (Max)

622.25 = 623V dc

1 & 2 (3 open) 1 minute 54 seconds 3 Minutes 622.25 =

623V dc 2 & 3 (1 open) 1 minute 53 seconds 3 Minutes 622.25 =

623V dc 3 & 1 (2 open) 1 minute 54 seconds 3 Minutes



CENTRAL POWER RESEARCH INSTITU P.B.NO.8066, S A D A S H I V A N A G A R SUB P.O


CPRI

Test Report No. DCCD - 12156

6. Sealing Test (as per CI. 12)

TEST R E P O R T



Cert.No.T- 0010

Sheet 5 of 13

Date: 15.07.2011

B)

Test conditions: (a) Test temperature : 75°C (b) Test duration : 2 Hours

Test Result: No leakage of the impregnant was observed at the end of the test period.

T Y P E T E S T S

Voltage test between terminals (as per CI. 9.2)

Ambient temperature: 29°C

Voltage Applied (Ut = 2.15 U N ac)

Voltage application Duration Observation

946 V ac


10 seconds No permanent breakdown or flash-over occurred

946 V ac Between terminals 2 & 3 (1 open)

10 seconds No permanent breakdown or flash-over occurred

946 V ac


10 seconds

No permanent breakdown or flash-over occurred

Result: Withstood.

Voltage test between terminals and container (as per CI. 10.2)

Measuring connection: ac voltage applied between terminals (joined together) and container of the capacitor.


Voltage Applied Duration Observation

3 k V a c 1 Minute No flash over or puncture

occurred

Result: Withstood




PROF.S IR .C .V .RAMAN R O A D , B A N G A L O R E - 560 080, INDIA Phone: + 91 (0) 80-2360 4435 Fax: 0 8 0 - 2 3 6 0 1 2 1 3

Report No. DCCD - 12156

TEST R E P O R T



Cert.No.T- 0010 Sheet 6 of 13

Date: 15.07.2011

3(a). Thermal Stability Test (as per CI. 13)

Test arrangement: The test capacitor was placed between two dummy capacitors supplied by the capacitor manufacturer. All the three capacitors were energised to the test voltage of 527 Volts ac with a 3 0 voltage source.

Specified test conditions: (a) Ambient Air Temperature (b) Test voltage (c) Test duration

55 °C 527 V ac 48 hours

The temperature of the container near the top was measured during the last 6 hours of thermal stability test. Measured values are as follows:

Measurement at the end of

Temperature of the capacitor container (°C)

Increase in temperature rise of capacitor container Measurement

at the end of Temperature of the

capacitor container (°C) Observed Specified

(Max.)

43 r d hour 64°C

Nil 1°C

44 t h hour 64°C

Nil 1°C 45 t h hour 64°C

Nil 1°C 46 t h hour 64°C Nil 1°C

47 t h hour 64°C

Nil 1°C

48 t h hour 64°C

Nil 1°C

Difference between capacitor case temperature and cooling air temperature measured at the end of the thermal stability test: 9°C

3(b). Change in capacitance & tangent of loss angle (tan5) before & after thermal

Voltage Applied

(UN)


Change in Capacitance Change in capacitor loss tangent (tan8)

Voltage Applied

(UN)


Measured Specified (Max.)


440 V ac

Between terminals 1 & 2 - 0 . 1 9 %

2 % - 0 . 3 X 10"4

2 X 10' 4

440 V ac Between

terminals 2 & 3 - 0.07 % 2 %

+0.6 X 10"4

2 X 10' 4

440 V ac Between

terminals 3 & 1 -0 .10 %

2 %

+0.5 X 10"4

2 X 10' 4


CPRI




TEST REPORT


•ft «


Cert.No.T- 0010

Sheet 7 of 13

Date: 15.07.2011


Measurement of the tangent of loss angle (tan 5 ) of the capacitor at elevated temperature (as per CI. 14)

Voltage (thermal stability

test voltage)

Temperature (thermal stability test temperature)

Measuring connection Tan5 (Absolute)

527 V ac 55°C Between terminals 1 & 2 0.00032

527 V ac 55°C Between terminals 2 & 3 0.00035 527 V ac 55°C

Between terminals 3 & 1 0.00035

5(a). Self-healing Test (as per CI.18 of IEC: 60831 -1:2002-11 -Edition 2.1 & IEC: 60831-2:1995-12)

A test voltage of 946 volts ac (2.15 U N ) was applied between the terminals of the capacitor and maintained for a period of 10 seconds. Number of Self-healing breakdowns were counted. Since more than five breakdowns occurred, the test voltage was reduced to zero. The Capacitance was then measured at the rated voltage(1.0UN= 440 Vac) and at ambient temperature between terminals.

5(b). Change in capacitance (as per CI. 18 of IEC: 60831-2:1995-12]

The observed change in capacitance before and after self-healing test is as follows:

Voltage Applied

(U N)

Measuring connection Measured change in capacitance

»

440 V ac

Between terminals 1 & 2 + 0.07% 440 V

ac Between terminals 2 & 3 - 0.03% 440 V

ac Between terminals 3 & 1 - 0.04%



CENTRAL POWER RESEARCH INSTITU P.B.NO.8066, S A D A S H I V A N A G A R S U B P.O


•IN- •

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T E S T R E P O R T



Cert.No.T- 0010

Sheet 8 of 13

Date: 15.07.2011

6. Lightning Impulse Voltage Test between terminals and container (as per CI.15)

(a) Test connection : The impulse source output was connected to the shorted terminals of the capacitor and the grounded capacitor case

(b) Test voltage : 8 kV (peak) (c) Atmospheric conditions : (i) Dry temperature : 29°C

(ii) Wet temperature: 27°C (iii) Atmospheric Pressure: 685 mm of Hg

(d) No. of impulses

Polarity Observation Reference to

Oscillogram enclosed Positive Withstood Oscillogram No.1 Negative Withstood Oscillogram No.2

Test Result: Withstood

7a). Discharge test (as per CI. 16)

Capacitor was charged to 880 Volts dc (2 U N) between terminals 3 & 1 - 2 (Joined together) and discharged through a sphere gap. This constitutes one cycle. Five such charging and discharging operations were performed within 10 minutes.


7b). Voltage test between terminals after discharge test (as per Cl.9.1)

Ambient temperature: 29°C Frequency: 50 Hz Voltage Applied (Ut = 2 . 1 5 U N ac)

Voltage application Duration

(Minimum) Observation

946 V ac


2 seconds No permanent breakdown or flash over occurred 946 V ac Between terminals 2 & 3

(1 open) 2 seconds

No permanent breakdown or flash over occurred 946 V ac


2 seconds

No permanent breakdown or flash over occurred

Result: Withstood


CPRI


CENTRAL POWER RESEARCH INSTITU P.B.NO.8066, SAD A S H I V A N A G A R S U B P.O


T E S T R E P O R T


Cert.No.T- 0010

Sheet 9 of 13

Test Report No. DCCD - 12156 Date: 15.07.2011


7c). Change in capacitance before & after discharge test (as per CI.16)

Voltage applied (UN)

Measuring connection Measured Change in Capacitance

Voltage applied (UN)



440 V ac Between terminals 1 & 2 + 0.05%

2 % 440 V ac Between terminals 2 & 3 + 0.05% 2 % 440 V ac

Between terminals 3 & 1 + 0.05%

2 %

8. Ageing Test ( as per CI.17 of IEC 60831-1:2002-11-Edition 2.1 & IEC 60831-2-1995-12)

(i) Initial 750 hours of Ageing Test (CI.17.2(a) of IEC 60831-2-1995-12)

Ageing test was performed by placing the test capacitor inside an hot air oven. The test conditions were as follows:

a) Test Temperature : 54°C

For Ageing test, case temperature of the capacitor was maintained at 45°C which is the highest mean temperature in 24 hours,(as per Table 1 of IEC: 60831-1-2002-11) plus 9°C,which is the difference between the capacitor case temperature and the cooling air temperature recorded at the end of thermal stability test (refer to test at SI.No.3 (a) under Type tests).

b) Temperature tolerance : ± 2°C

c) Test voltage : 550 Volts ac (1.25UN)

All the three phases of the capacitor sample were energized with the help of of 3 0 voltage source by applying the test voltage of 550 volts ac after the container of the capacitor reached the test temperature of 54°C± 2°C.

d) Test duration : 750 hours



CENTRAL POWER RESEARCH INSTITU P.B.NO.8066, S A D A S H IVAN A G A R SUB P.O


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T E S T R E P O R T


Cert.No.T- 0010

Sheet 10 of 13

Date: 15.07.2011


(ii) Charge discharge Cycle test (as per Cl.17.2 (b) of IEC: 60831-2:1995-12)

After completing the ageing test on the sample for 750 hours, a test voltage of 880 V dc (2U N dc) was applied between terminals 1 & 3 (terminal 2 left unconnected) for 10 seconds and then discharged through an inductance of value 4.2 uH within 20 seconds. This constituted one cycle. The sample was subjected to 1000 such charge - discharge cycles. Through out the test, the temperature of the capacitor case was maintained at 54°C ± 2°C as per Cl.17.2 of IEC: 60831-2:1995-12. After 1000 charge - discharge cycles the sample was subjected to repeat ageing test.

(Mi) Repeat Ageing Test (Cl.17.2(c) of IEC 60831-2-1995-12)

The ageing test was repeated as in test at SI. No. 8 (i) after 1000 charge discharge cycles.

Test conditions: i) Test voltage : 550 Volts ac (1.25 U N )

ii) Test temperature : 54°C ± 2°C iii) Test duration : 750 hours

Test Result: 1) No permanent breakdown occurred. 2) No interruption or flashover occurred.

(iv) Change in capacitance before and after Ageing Test (as per 17.3 of IEC 60831-2-1995-12)

Observed change in capacitance before and after ageing test is as follows:


Voltage(U N) Between Terminals

Change in Capacitance Voltage(U N) Between Terminals Measured Specified

(Max.)

440 V 1 & 2 (3open) 0.04%

5% 440 V 2 & 3 (1 open) 0.03% 5% 440 V 3 & 1 (2 open) 0.01%

5% 440 V

Average 0.03% 3%




PROF.S IR .C .V .RAMAN R O A D , B A N G A L O R E - 560 080, INDIA Phone:+ 91 (0) 80-2360 4435 F a x : 0 8 0 - 2 3 6 0 1 2 1 3

CPRI


T E S T R E P O R T


^ Ii


Cert. No.T- 0010

Sheet 11 of 13

Date: 15.07.2011

(v) Voltage test between terminals and container (as per Cl.17.3 of IEC 60831-2-1995-12 & as per CI.10.1 of IEC 60831-1:2002-11-Edition 2.1)

Measuring connection: Voltage was applied between terminals (joined together) and container

Ambient temperature: 29°C Voltage Applied Duration Result Observations

3 kV ac 10 seconds Withstood Neither flash over nor puncture occurred


(vi) Sealing Test (as per Cl.17.3 of IEC 60831-2-1995-12 & as per CI. 12 of IEC 60831-1-2002-11)

Test conditions: (a) Test temperature (b) Test duration (c) Test Result

75°C 2 Hours No leakage of the impregnant was observed at the end of the test period.

9(a) Destruction Test (as per CI. 19 of IEC 60831-2-1995-12)

The capacitor sample was mounted in a circulating air oven maintained at a temperature of 55°C without energizing. After all the parts of the capacitor attained the test temperature, the destruction test was performed between terminals 3 and 1& 2 (joined together) as per CI. 19.1 of IEC 60831-2-1995-12).

The test voltages applied are as given below: a) A C voltage of 572 volts ac (1,3U N ac) b) DC voltage of 4.4 kV dc (10 U N dc)

After the capacitor current reduced to 66% of the initial current, the test procedure was interrupted.

Test Result: 1) Sample withstood the test 2) No escaping liquid material observed on the surface of the capacitor 3) The capacitor container not broken 4) No flame or fiery particles observed



CENTRAL POWER RESEARCH INSTITU P.B.NO.8066, S A D A S H I V A N A G A R S U B P.O


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T E S T R E P O R T



Cert.No.T- 0010

Sheet 12 of 13

Date: 15.07.2011

9 (b) Dielectric test between terminals and container (CI. 19.2 (d) of IEC 60831-2-1995-12)

Voltage was applied between terminals (joined together) and container.


Voltage Applied

Duration Observation

1.5 k V a c 10 seconds No flash over or puncture occurred


Note: 1) Tangent of loss angle (tan 5) measurements carried out are exclusive of discharge device of the capacitor.

2) Measurement was carried out with a cable of copper conductor of size 16 Sq mm and length of 450 mm connected to the terminals of the capacitor.

Test summary: The capacitor sample complies with the requirements of IEC 60831-1:2002-11-Edition 2.1 and IEC: 60831-2:1995-12 for Routine and Type tests Performed as above.



CENTRAL POWER RESEARCH INSTITU P.B.NO.8066, S A D A S H I V A N A G A R SUB P.O

PROF.S IR .C .V .RAMAN R O A D , B A N G A L O R E - 560 080, INDIA Phone: + 91 (0) 80-2360 4435 Fax: 080 -23601213

CPRI


Cert.No.T- 0010

TEST R E P O R T Sheet 13 of 13

Test Report No. DCCD - 12156 Date: 15.07.2011 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 report and in the language written, is not permitted without the written consent of CPRI.

c) Any correction/erasure invalidates the test report.

d) Any anomaly/discrepancy in the test report should be brought to our notice within 45 days froni the date of issue.





CPRI


Cert. No.T- 0010

Test Report Number: DCCD-12156 Date: 15.07.2011

Oscillogram No.1

Name & address of the customer M/s. Shreem Electric Ltd., Gat No.311, Near Ratnappaanna Kumbhar, Market Yard Gate, Jaysingpur-416 144, Maharashtra Ref.: Letter No. Nil dated 16.04.2011 & Customer Request Form dated 19.04.2011

Serial No. of the Sample S D - 0 0 1

CPRI Sample Code No. DCCDCAPL11S0032

Polarity Positive Test voltage (UP) : 8 kV (peak)

27.6 kV

20.7 kV

13.8 kV

6.9 kV — - — . ; . . _ . . . J . . .

0.00 kV ~

-6.9 kV

-13.8 kV

-20.7 kV

-27.6 kV

-10uS OuS 10uS 20u.S 30uS 40u.S 50u.S 60uS 70u.S 80uS 90p.S



CENTRAL POWER RESEARCH INSTITU P.B.NO.8066, SADASHIVANAGAR SUB P.O

PROF.S IR .C .V .RAMAN R O A D , B A N G A L O R E - 560 080, INDIA Phone. + 91 (0) 80-2360 4435 Fax: 080 - 23601213

CPRI

Test Report Number: DCCD-12156

Name & address of the customer


Cert.No.T- 0010

Date: 15.07.2011 Oscillogram No.2

M/s. Shreem Electric Ltd., Gat No.311, Near Ratnappaanna Kumbhar, Market Yard Gate, Jaysingpur-416 144, Maharashtra

Serial No. of the Sample

CPRI Sample Code No.

Polarity Test voltage (UP)

Negative 8 kV (peak)

Ref.: Letter No. Nil dated 16.04.2011 & Customer Request Form dated 19.04.2011

S D - 0 0 1

DCCDCAPL11S0032

10(iS OuS 10u.S 20u,S 30u.S 40u.S 50|aS 60p.S 70u.S 80p.S 90u.S



CENTRAL POWER RESEARCH INSTITUTE P.B.NO.8066, SADASHIVANAGAR SUB P.O

PROF.SIR.C.V.RAMAN ROAD,BANGALORE - 560 080, INDIA Phone: + 91 (0) 80-2360 4435 Fax: 080 - 23601213

CPRI


Cert.No.T-0010

TEST REPORT

Test Report No: DCCD-12156 Date: 15.07.2011

TOP VIEW

DRG-NOSR-IEC-

25 KVAR/440V / 3Ph LT M P P T Y P E CYLINDRICAL OIL FILLED CAPACITOR DIAGRAM

S C A L E : N. T. S.

ureem Mid B Y - S H R E E M E L E C T R I C L T D

J A Y S 1 N G P U R

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