Typical Description of AC/Partial Discharge Test System for High Voltage cables
This test system is mainly used to AC test and PD detection for XLPE cables 10-500KV and other apparatus.
A typical series resonant test system designed for HV/PD test e. g. for Power Cable testing is shown as below.
Technical Parameters of AC/Partial Discharge Test System for High Voltage cables
Technical Parameters of AC/Partial Discharge Test System for High Voltage cables
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Item
Rated voltage of
XLPE cable
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6/10,8.7/10KV,
XLPE
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21/35,26/35KV
XLPE(2.5Uo)
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21/35,26/35KV
XLPE(3.5Uo)
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63.5/110KV,
XLPE
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76.2/132KV,
XLPE
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127/220KV,
XLPE
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Rated output voltage﹠capacity
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35kv,350KVA
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75kv,750KVA
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120kv,1200KVA
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200kv,2000KVA
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250kv,2500KVA
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350kv,5000KVA
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Input voltage﹠capacity
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50Hz,380V,
20KVA
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50Hz,380V,
40KVA
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50Hz,380V,
60KVA
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50Hz,380V,
100KVA
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50Hz,380V,
175KVA
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50Hz,380V,
250KVA
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PD noise level pC
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Under 100% rated output voltage,＜2pC
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Measuring precision of voltage
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±1%
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Locating accuracy of PD faults
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Up to 1% of the cable length and can be reached ≤±1m
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Environmental temperature
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10℃~40℃
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Relative humidity/altitude/
indoor or outdoor
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≤95% /≤1000m altitude/indoor use
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Grounding for the test system
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One or two copper rod,the depth grounding resistance shall be less than 1Ω
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The insulation isolated resistance between the test area and surrounding
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＞1000MΩ measuring when water immerssion
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Design quality factorQ
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20
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Power supply for the test system
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10kv/0.4kv
20kvA Single transformer
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10kv/0.4kv
40kvA Single transformer
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10kv/0.4kv
60kvA Single transformer
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10kv/0.4kv
100kvA Single transformer
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10kv,175kvA Single Transformer
Supply from city grid
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10kv,250kvA Single Transformer
Supply from city grid
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HV reactor
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35kv/350kvA
Taps:35kv,20kv
Turning range:
35kv0.001-0.9μv
20kv0.021-2.7μv
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75kv/750kvA
Taps:75kv,40kv
Turning range:
75kv0.021-0.42μv
40kv0.039-1.5μv
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120kv/1200kvA
Taps:120kv,70kv
Turning range:
120kv0.012-0.27μv70kv0.022-1.0μv
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200kv/2000kvA
Taps:200,100,40kv
Turning range:
200kv 0.012-0.20μv
100kv 0.014-0.67μv
40kv0.19-3.9μv
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250kv/2500kvA
Taps:250,150,100k
Turning range:
250kv 0.008-0.318μv
150kv 0.024-0.49μv
100kv0.055-1.1μv
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350kv/5000kvA
Taps:350,250,150k
Turning range:
350kv 0.022-0.45μv
250kv 0.012-0.25μv
150kv0.035-0.7μv
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Excit transformer
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20kvA 1.75/1.0kv
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35kvA 3.5/2.0kv
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60kvA 6/3.5kv
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100kvA 10/5/2kv
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175kv12.5/7.5/5kv
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250kvA
35/17.5/8.75kv
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Double-shielded isolated transformer
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380v/380v,20kvA
~10dB
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380v/380v,35kvA
~10dB
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380v/380v,60kvA
~10dB
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380v/380v,100kvA
(10v/380v100kvA)
~10dB
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380v/380v,175kvA
(10v/380v175kvA)
~10dB
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10v/380v,250kvA
~10dB
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Regulater
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380v/0~380v
20kvA
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380v/0~380v
35kvA
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380v/0~380v
60kvA
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380v/0~380v
100kvA
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380v/0~380v
175kvA
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380v/0~380v
250kvA
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HV Divider
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35kv ±1%,＜2pC
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75kv ±1%,＜2pC
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120kv±1%,＜2pC
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200kv±1%,＜2pC
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250kv±1%,＜2pC
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350kv±1%,＜2pC
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LV Filter
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380v,50A ~20dB
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380v,90A ~20dB
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380v,160A ~20dB
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380v,263A ~20dB
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380v,460A ~20dB
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380v,657A ~20dB
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HV Filter
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35kv,18A,＜2pC,
＞40dB
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75kv18.75A＜2pC
＞40dB
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120kv,20A,＜2pC,
＞40dB
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200kv,20A,＜2pC,
＞40dB
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250kv,35A,＜2pC,
＞40dB
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350kv,33A,＜2pC,
＞40dB
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Calibration injected capacitor
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100pF,35kV,
＜2pC
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100pF,75kV,
＜2pC
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100pF,120kV,
＜2pC
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100pF,200kV,
＜2pC
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100pF,250kV,
＜2pC
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100pF,350kV,
＜2pC
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Test terminal
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Insulation
oil/Freon TE＜2pC
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Insulation
oil/Freon TE＜2pC
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Insulation
oil/Freon TE＜2pC
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Water termination
CTT 300
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Water termination
CTT 300
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Water termination
CTT 400
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PD Detector/Site Locator
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JFD series digital PD detector/site Locator
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Shielded room(m)
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6×4×4.5
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6×4×4.5
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8×5×4.5
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11×7×5
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11×7×5
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17×10×7
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Control room
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Inside or outside of shield room
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Special devices for locating the PD position closed the cable end
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Optional
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Rail trolley for tested cable drum
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Carring capacity:10/15/25/30T,the cable drum can be rotated(optional)
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