Item |
Standard |
Test Category |
Product Category |
48/66kV |
64/110kV |
127/220kV |
Porcelain Sleeve Terminal |
Composite Sleeve Terminal |
GIS terminal |
Straight / Insulated Joint |
flexible terminal |
Sealing Fittings, Porcelain, Composite Sleeves |
0.25±0.01MPa/1h, no leakage |
R |
yes |
yes |
yes |
- |
- |
Epoxy Sleeve |
0.6~0.7MPa/1h, no leakage |
Partial discharge of prefabricated parts |
72kV |
96kV |
190kV |
R |
yes |
yes |
yes |
yes |
yes |
Detects no more than background discharge |
Frequency withstand voltage of prefabricated parts |
120kV |
160kV |
318kV |
R |
yes |
yes |
yes |
yes |
yes |
30min,no flashover, no breakdown |
Partial discharge at room temperature |
72kV |
96kV |
190kV |
T |
yes |
yes |
yes |
yes |
yes |
Detects no more than background discharge |
Thermal cycling voltage test |
96kV |
128kV |
254kV |
T |
yes |
yes |
yes |
yes |
yes |
20 cycles, no flashover, no breakdown |
Partial discharge test at high temperature |
72kV |
96kV |
190kV |
T |
yes |
yes |
yes |
yes |
yes |
Detects no more than background discharge |
Lightning impact test and subsequent frequency withstand voltage test |
450kV |
550kV |
1050kV |
T |
yes |
yes |
yes |
yes |
yes |
10 times for each positive and negative polarity |
120kV |
160kV |
318kV |
15min, no flashover, no breakdown |
Directly buried joint outer protective layer immersion voltage test |
Two ends impact among the 60/75kV,an end of hit 30/37.5kV |
Two ends impact among the 60/95kV,an end of hit 30/47.5kV |
T |
- |
- |
- |
yes |
- |
Sealing test after assembly of accessories |
0.25±0.01MPa/1h, no leakage |
T |
yes |
yes |
yes |
yes |
yes |
Outdoor terminal rain frequency voltage test |
140kV |
185kV |
460kV |
T |
yes |
yes |
- |
- |
yes |
1min, no flashover, no breakdown |
Pillar insulator voltage test |
20kV/1min, no flashover, no breakdown |
T |
yes |
yes |
- |
- |
- |
Radio interference test for outdoor terminals |
61kV |
81kV |
140kV |
A |
yes |
yes |
- |
- |
yes |
1MHz radio interference, voltage ≤ 450μV |
1MHz radio interference, voltage ≤ 500μV |
Accessory specimen test |
Visual inspection of accessory systems containing cables with no signs of deterioration that could affect the normal operation of the system |
T |
yes |
yes |
yes |
yes |
yes |
DC voltage test |
/ |
No breakdown between conductor and metal shield in connector, 20kV/1min. |
T |
- |
- |
- |
yes |
- |
Performance test of crimped connectors for conductor connecting rods |
The total area after crimping is not more than 1.2 times the resistance of an equal length of conductor of the same cross-section. |
T |
yes |
yes |
yes |
yes |
yes |