Report of Type Test for 500kV LA

Quality Inspection and Test Center for Equipment (2006) No. 070 of Electric Power Inspection Report

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Quality Inspection and Test Center for Equipment of Electric Power (2002)Quality(Country)No(K0711) No. L1026 (2006) No.070

Inspection Report Address: 143 Luoyu Rd., Hongshan District, Wuhan, Hubei Postal Code: 430074 Telephone: (027)87445917, 87445905 Fax: (027)87445917 Website: www.whvri.com Email: [email protected]





1. Entrusting Company

Nanyang Jinguan Electric Co., Ltd. 2. Sample Description

Name: 500kV porcelain-housed metal oxide surge arrester without gaps for A.C. system Type: Y20W-444/1015 Manufacturer: Nanyang Jinguan Electric Co., Ltd. Sampling Method: Sampling Sample Quantity: 1 piece surge arrester (A1), 1 housing (B1), 16 pieces scale units (C1-C16) Varistor Type: Ф115/Ф42*21mm

3. Test Standard

IEC 99-4: Metal oxide surge arrester without gaps for A.C. system Technical Conditions of the Manufacturer: Outline test for 500kV metal oxide surge arrester without gaps for A.C. system

4. Inspection Type Type Test

5. Inspection Date 2006-06-28---2006-08-02

6. Period of Validity

Three years from issuing 7. Inspection Results

According to IEC 99-4 standards and requirements, we did the type test to porcelain-housed metal oxide surge arrester without gaps for A.C. system Y20W-444/1015, which offered by Nanyang Jinguan Electric Co., Ltd. The 12 test items fulfilled the requirements, eligible. Inspection and Testing: Li Ze, Jia Jinhu Checking: Li Ze Auditing: Approval: Date: 2006-08-04





8. Test Items & Results No. Test Item Standard Requirementd Test Results Conclusion

1 Continuous

current test

Sample: 1 surge arrester(A1)

Complete current: Ix≤5000μAr.m.s.

Resistance current: Ir≤800μAp

Ix: 2280μA r.m.s.

Ix: 350μAp

Fulfill the

requirement

s

2

Power

frequency

reference

voltage test


Under power frequency reference

current 1mA, U5mA A.C.≥444kV r.m.s.

U5mA A.C.: 447.8kV r.m.s.

Fulfill the

requirement

s

3 D.C. reference

voltage test


Under D.C. reference current 1mA,

597≤U1mA D.C.≤602kV

U1mA D.C: 601.0kV

Fulfill the

requirement

s

4

Current

leakage test

under

0.75U1mA D.C.


IL(0.75 U1mA D.C.) ≤50μA IL(0.75 U1mA D.C.): 22.0μA

Fulfill the

requirement

5

Partial

discharge test

& radio

interference

test


a. Apply Ur to arrester, lasting for 10s,

then turn down to 1.10 Ur, doing the

measurement. Partial discharge

≤10pC

b. Under 1.10 Ur, radio interference

voltage ≤500μV

a. first apply voltage 444kV, lasting for

10s, then turn down to 390.5kV,

measuring the partial discharge:

6.0pC

b. apply voltage 390.5kV, measuring the

radio interference voltage: 280μV

Fulfill the

requirement

s

6 Mechanical

load test

Sample: 1 surge arrester unit (down unit

of A1, including the base)

Surge arrester suitable for vertical

mounting, only carrying out anti-bending

load test.

Top of surge arrester should endure

horizontal pulls 5.75kN、10s, and should

no damage

Test was carried out on the unit with base,

converting according to the height:

Arrester total height 5.86m, height of the

unit with base 2.16m, height scale factor:

5.86/2.16=2.72, then should apply

horizontal pull 5.75*2.72=15.64kN to the

unit with base; In fact, applied 17.0kN,

converting to 6.25kN on the top of arrester,

withstanding 10s, housing the terminals no

abnormal phenomenon

Fulfill the

requirement

s

7 Sealing test

Sample: 1 surge arrester (A1, four scale

units)

Using helium leakage method: helium

leakage detector calibration, when

creating a vacuum to 26Pa, spraying

helium to each sealing surfaces, then

using helium leakage detector to

measure the leak rate and should not

exceed 6.65*10-5Pa·L/s

Creating a vacuum to 26Pa, spraying

helium to each sealing surfaces, using

helium leakage detector to measure the

leak rate of the sample:

Sample No. Leak Rate(Pa·L/s)

A1-1: <1.0*10-5

A1-2: <1.0*10-5

A1-3: <1.0*10-5

Fulfill the

requirement

s





8

Porcelai

n

housing

insulatin

g

withstan

d test

Sample: 1 surge arrester housing(B1)

(1) Power frequency withstand voltage:

(kV r.m.s.)

Dry: 890, withstanding time: 1min

Wet: 740, withstanding time: 10s

(2) Lightning impulse withstand voltage:

1675kVp

Anode and cathode both 15 times, sample

should no flashover phenomenon

(3) Switching impulse withstand

voltage(wet): 1250kVp

Anode and cathode both 15 times, sample

should no flashover phenomenon

Corrected to standard atmosphere conditions:

(1) Power frequency withstand voltage

Dry: 891.4kV r.m.s., withstanding time: 1min,

Passed

Wet: 740.3kV r.m.s., withstanding time: 10s,

Passed

(2) Lightning impulse withstand voltage:

1681.7kVp

Anode and cathode both 15 times, sample no

flashover phenomenon

(3) Switching impulse withstand voltage(wet):

1255.4kVp

Anode and cathode both 15 times, sample no

flashover phenomenon

Fulfill

the

require

ments

9

Residual

voltage

test

(1) Steep current impulse residual voltage

test

Sample: 3 Scale units(C1-C3)

Measuring the residual voltage under 1/5μs、

20kA steep current impulse, multiplying scale

factor, converting into residual voltage of the

complete surge arrester, the maximum value

defined to be the steep current impulse

residual voltage of the surge arrester. The

value should not large than 1106kVp

Scale unit U1mA D.C: (kV) Scale unit U20kA: (kVp)

4.32 4.32 4.32 7.76 7.77 7.82

Scale factor:

139.3 139.3 139.3

Surge arrester U20kA: (kVp)

1081.4 1082.8 1089.8

Steep current impulse residual voltage of the surge

arrester: 1090kVp

Fulfill

the

require

ments

(2) Lightning impulse residual voltage test

Sample: 3 scale units (C1-C3)

Measuring lightning impulse residual voltage

under 8/20μs 10kA、20kA、40kA, multiplying

scale factor, converting into residual voltage of

the complete surge arrester. Getting the

maximum value, drawing a relative curve

between the residual voltage and current.

From the curve, residual voltage that

corresponding 20kA is defined to be the

lightning impulse protection level of the surge

arrester. The value should not large than

1015kVp

Scale unit U1mA D.C: (kV) Scale unit U10kA: (kVp)

4.32 4.32 4.32 6.85 6.86 6.88

Scale unit U20kA: (kVp) Scale unit U40kA: (kVp)

7.23 7.22 7.25 7.88 7.86 7.90

597≤U1mA D.C.≤602kV

Scale factor:

139.3 139.3 139.3


954.6 956.0 958.8


1007.6 1006.2 1010.3


1098.1 1095.3 1100.9

According to residual voltage---current curve,

getting the lightning impulse protection level of the

surge arrester: 1013kVp





(3) Switching impulse residual voltage test

Sample: 3 scale units(C1-C3)

Measuring switching impulse residual voltage

under 30/80μs 2000A, multiplying scale factor,

converting into residual voltage of the complete

arrester. The maximum value defined to be the

switching impulse protection level of the surge

arrester. The value should not large than

856kVp

Scale unit U1mA D.C: (kV) Scale unit U2000A:

(kVp)

4.32 4.32 4.32 6.06 6.04

6.09

Scale factor: Surge arrester U2000A:

(kVp)

139.3 139.3 139.3 844.5 841.7

848.7

Switching impulse protection level of the surge

arrester: 849kVp

Fulfill

the

require

ments

1

0

Long

duration

current

impulse

withstand

test

a. Line discharge test:

Sample: 3 scale unit(C4-C6)

Line discharge class: 5

Test parameters:

Z- line wave impedance: 0.5Ur

UL-electrification voltage: 2.4Ur

T-lasting time: 3200μs

(1) Measuring 30/80μs 500A switching impulse

residual voltage Ures, getting the minimum

value. According to formula, calculating the

energy W that get across the sample

(2) When measuring the first time discharging,

sample energy capability W1 (W1 should be

90-100%W)

(3) When measuring the eighteenth

discharging, sample energy capability W18(W18

should be 100-110%W)

Pre and after test: change rate of residual

voltage should not large than 5%, sample

should no puncture 、 no flashover and no

damage phenomenon

Scale unit U1mA D.C: (kV) Scale unit Ur:

(kV)

8.58 8.58 8.58 6.38 6.38

6.38

U20kA pre-test: (kVp)

14.42 14.38 14.40

Z-3.19Ω UL=15.31kV

Actual measurement T: 3340μs

Discharging times: 18

(1) Ures(500A): (kVp)

11.48 11.43 11.46

W= Ures*( UL- Ures)*T/Z=46.67kJ

(2) First time discharging, energy capability

W1(kJ)

46.20 46.56 46.32

(3) Eighteenth discharging, energy capability

W18(kJ)

47.02 47.28 47.10

U20kA after test: (kVp)

14.50 14.45 14.46

Change rate of residual voltage: (%)

+0.70 +0.49 +0.42

Sample no puncture 、 no flashover and no

damage phenomenon

Fulfill

the

require

ments

b. Rectangular wave current impulse test


Rectangular wave current: 2000μs 2500A 18

times

Change rate of residual voltage for pre- and

after test: ≤5%

Sample should no puncture、no flashover and

no damage phenomenon

Test was carried out according to established

procedure and requirements of the entrusting

company

2120μs 2500-2520A 18 times

Passed

U20kA pre-test: (kVp) U20kA after test:

(kVp)

7.28 7.30 7.25 7.32 7.25 7.30




+0.55 -0.68 +0.69

sample no puncture、no flashover and no damage

phenomenon

1

1

Switching

impulse

operating

duty test


On electricity and heat capability, scale unit is

equal to the complete surge arrester.

(1) Varistors ageing accelerate test:

Scale unit U1mA D.C: (kV)

8.52 8.52 8.52

Scale unit Ur: (kV)

6.34 6.34 6.34





Confirm Kcr、Ur

＊、Uc

＊

(2) Preliminary test:

Under 1.2 Uc＊, apply 8/20μs、20kA impulse

current 20 times, then apply 4/10μs、100kA

impulse 2 times

(3) Switching impulse operating duty test:

Sample pre-heated to 60±3, applying

line discharge (Class 5) 2 times, then within

less time (no more than 100ms), applying

power frequency voltage. In this period,

change of voltage should not larger than 1%

1.0 Ur＊

10s

Uc＊

30min

Confirm second long line discharging,

energy capability that pre- and after test:

Change rate of residual voltage should no

more than 5%

Sample should no puncture、no flashover

and no damage phenomenon

Scale unit Uc: (kV)

5.07 5.07 5.07


14.38 14.36 14.39

Entrusting company provide varistors ageing factor:

Kcr=1.0(95% apparent chargeability)

1.0 Ur＊: (kV) 6.34 6.34 6.34

Withstanding time: 10s

Uc＊: (kV) 5.07 5.07 5.07

Lasting time: 30min


procedures.

Second long line discharging, energy capability(kJ):

46.58 46.80 46.50


14.33 14.40 14.36


-0.35 +0.29 -0.21

sample no puncture、no flashover and no damage

phenomenon

Fulfill

the

require

ments

1

2

Power

frequency

withstand

voltage

time

capability

test

Sample: 4 scale unit( C13-C16)

On electricity and heat capability, scale unit

is equal to the complete surge arrester.

Measuring the residual voltage before test

Sample pre-heated to 60±3, each

sample applied second line discharge (Class

5), then within less time (no more than

100ms), applying power frequency voltage.

In this period, change of voltage should not

larger than 1%

Power frequency withstanding value &

withstanding time:

(1) 1.20 Ur＊

1.0s

Uc＊

30min

(2) 1.15 Ur＊

10s

Uc＊

30min

(3) 1.10 Ur＊

100s

Uc＊

30min

Scale unit U1mA D.C: (kV)

8.48 8.48 8.48 8.48

Scale unit Ur: (kV)

6.31 6.31 6.31 6.31

Scale unit Uc: (kV)

5.04 5.04 5.04 5.04


14.25 14.28 14.24 14.27

varistors ageing factor: Kcr=1.0(95% apparent

chargeability)

Scale unit Ur＊: (kV)

6.31 6.31 6.31 6.31

Scale unit Uc＊: (kV)

5.04 5.04 5.04 5.04

Second time inserted energy(kJ): 14.72-14.88

(1) 1.20 Ur＊: 7.57kV

Withstanding time: 1.0s

Uc＊: 5.04kV

Lasting time: 30min

(2) 1.15 Ur＊: 7.26kV

Fulfill

the

require

ments





(4) ) 1.00 Ur

＊ 20min

Uc＊

30min

Measuring the residual voltage after test

Sample should no thermal runaway、 no

damage phenomenon


Uc＊: 5.04kV; Lasting time: 30min

(3) 1.10 Ur＊: 6.94kV



(4) 1.00 Ur＊: 6.31kV

Withstanding time: 20min



procedures.


14.29 14.25 14.28 14.30

Sample no thermal runaway、no damage.

Annex A、Sample Figuration Drawing





Annex B、Sample Main Specifications Rated Voltage Ur: 444kV Continuous Operating Voltage Uc: 355kV Nominal Discharge Current In: 20kA Lightning Impulse Residual Voltage Ures≤1015kV Annex C、Main Inspection & Test Equipments

No.

Equipment Name/Type

Equipment No.

Range Accuracy or Inaccuracy

Test Organization Period of Validity

1

2250kV power frequency high

voltage generator

/ 0-2250k

V /

National High-Voltage Measurement Station

2007-11-25

2 5400kV impulse

voltage generator

/ 0-5400k

V /


2007-08-24

3

1400kV power frequency high

voltage generator

SB201 0-1400k

V /


2007-05-08

4 2400kV D.C.

high voltage test instrument

SB203 0-2400k

V /


2007-05-10

5 8/20μs impulse

current generator

BL023 0-40kA /

Quality Inspection and Test Center for

Equipment of Electric Power

2008-05-15

6 4/10μs high

current impulse generator

BL025 0-150kA /



2008-05-14

7 Long duration

impulse current generator

BL024 0-2500A /



2008-05-25

8 D.C. reference voltage tester

0100 0-6kV Class 1 National High-Voltage Measurement Station

2007-06-09

9 LCD-4 resistive current tester

008 0-10mA 3% National High-Voltage Measurement Station

2007-04-05

10 TDS1002

oscilloscope C048918 0-300V 2%

Hubei Test Technology Academe

2006-08-23

11 HAEFELY64M

peak value voltmeter

080452-24-88

0-1600V Class 1 National High-Voltage Measurement Station

2007-06-01



12 JFD-2B partial

discharge tester 98020 / 0.5pC


2008-05-14



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