Summarize
JDQXF-123/245W2 voltage transformer is single phase outdoor structure. It is combinative insulation which consist of SF6 gas and polyester film. It is mainly used to measure voltage, energy and for delay protection in solidly earthed system.It consists 4 windings including high voltage primary winding, measuring winding, protective winding and remain voltage winding in the low voltage side.This item is box type structure and it makes up of high voltage terminal, high strength bushing, base, porcelain shell and wire outlet secondary terminal box.
Main technical specification
1. Using environments
(1)Sea level altitude: not exceed 2000m
(2)Temperature: Max: +50oC/Min:-40oC;average temperature in the daytime not exceed 30oC
(3)Max relative humidity average per month: 90%
(4)Max average for wind speed within 10min: 35m/s
(5)Max thickness for the covered ice: 10mm
(6)Pollution level: III, IV class
2. Highest voltage for equipment: 110kVPT: 126kV
220kVPT: 252kV
3. Rated frequency: 50Hz
4. Rated voltage ratio: 110kV PT: kV
220kV PT: kV
5. Accuracy and rated output pls see below table, accuracy and restricted error limit are according to all stipulations in GB1207<Voltage transformer>:
|
Windings |
Accuracy class |
Rated output(VA) |
Other windings out put |
|
measuring winding |
0.2 |
100 |
protective class 150 |
|
Secondary windings of protective class |
0.5 |
150 |
measuring winding100 |
|
3P |
150 |
measuring winding 100 |
Remain voltage winding 300 |
|
250 |
measuring winding 100 |
Remain voltage winding 300 |
|
Remain voltage winding |
3P |
300 |
measuring winding 100 |
protective class 150 |
|
measuring winding 150 |
Protective class 150 |
|
measuring winding 150 |
protective class 250 |
6. Protective secondary winding terminal output: 2000VA
7. Rated insulation level is conforming with the stipulation in GB311.1
Short-time power frequency withstand voltage: 110kVPT: 200kV
220kVPT: 395kV
Full wave lightning impulse withstand voltage: 110kVPT: 480kV
220kVPT: 950kV
Chopped wave lightning impulse withstand voltage: 110 kVPT: 530kV
220 kVPT: 1050kV
8. Rated pressure of SF6 gas: 0.4Mpa (20oC)
Rated supplementary gas pressure of SF6 gas: 0.35Mpa (20oC)
9. Airproof capability: Annual gas leakage: not exceeding 0.1% when the temperature is 20oC and SF6 gas is filled inside of the product at he rated pressure.
10. Partial discharge level: under 1.2 times of the max equipment working voltage not exceeding 5Pc
Zero gauge pressure withstand voltage: 110kVPT: 95kV
220kVPT: 190kV
11. Water content in the SF6 gas: not exceeding 150 * 10-6 (V/V)
12. Water content in the SF6 gas: not exceeding 150 * 10-6 (V/V)
13. Radio interference level: under 1.2 rated phase voltage < 500*10-6V, in the sunshine evening under the max equipment working voltage we can't see the corona phenomenon.
14. External insulation ratio of the creepage distance: Min(25mm/kV)
15. Static allowable load of the primary outlet terminal: 4000N
16. Total max weight: 110kVCT: 500kgs (gas weight 5kgs)
220kVCT: 1200kgs (gas weight 20kgs)
17. The transformer is capacitive,no ferro-resonance under overage voltage
18. Other structure characteristics is the same as the instructions for CT.
Products
Gas-insulated voltage transfomers
