| Brand | Wone |
| Model NO. | ZF□-252 gas-insulated metal-enclosed switchgea |
| Rated voltage | 252KV |
| Rated normal current | 4000A |
| Rated frequency | 50（Hz） |
| Series | ZF□-252 |
Description
ZF□252 gas-insulated metal-enclosed switchgear (referred to as GIS) is used for three-phase AC 50HZ, 220KV power system. The product adopts a common-phase three-station isolated grounding switch structure and modular design, which can meet various wiring methods.
Industry applications
It is mainly used in power plants, substations, and large industrial and mining enterprises. Divide and combine no-load, load and fault currents, conversion loads, isolation lines, grounding protection and measurement of power transmission and transformation systems.
Features
The circuit breaker adopts horizontal arrangement, the arc extinguishing chamber adopts a single-break double-acting structure, and the self-energy arc extinguishing principle is equipped with a low-power spring operating mechanism, which effectively reduces mechanical stress, has high mechanical operation reliability, and has a mechanical life of 10,000 times.
Adopt three-station isolation grounding switch structure, mechanical interlocking between isolation and grounding, effectively avoid misoperation, high reliability, and mechanical life of 10,000 times.
Three-station isolation grounding switch and main bus adopt three-phase co-box structure. The sealing surface and bonding surface of SF6 gas are reduced, which greatly reduces the air leakage rate; The three-station isolated grounding switch has no complex external connecting rods and connectors, simple structure and excellent corrosion resistance.
The rated SF6 gas pressure is low, except for the circuit breaker, the other gas chambers are rated at 0.4MPa, which greatly reduces the use of SF6 gas and reduces the greenhouse effect.
Technical parameters
| Name | Unit | Technical parameters | |
| Rated voltage | KV |
252 |
|
| Current rating | A | 4000 |
|
| Rated frequency | Hz |
50 |
|
| The first polar factor | / | 1.3 |
|
| Rated short-circuit interrupting current | KA |
50 |
|
| Rated short-time withstand current (RMS) | KA/S | 50/3 | |
| Rated peak withstand current | KA |
125 |
|
| 1min rated power frequency withstand voltage | Interphase/Ground | KV |
460 |
| Fracture | 460（+146） |
||
| Rated lightning impulse withstand voltage | Interphase/Ground | 1050 |
|
| Fracture | 1050（+206） |
||
| Control and auxiliary circuits | 1min power frequency withstand voltage | V |
2000 |
| Motor voltage | V | DC220、AC220 |
|
| Control voltage | V | DC220/110、AC220/110 | |
| SF6 gas rated pressure (gauge pressure 20°C) | Circuit breaker air chamber | MPa | 0.60 |
| Other gas chambers | 0.40 |
||
| Partial discharge measurements | Whole intervals | PC |
<=5 |
| Individual insulators | µV | <=3 |
|
| Radio interference voltage | <=500 |
||
| Noise level | dB | <=90 |
|
| Annual leakage rate of SF6 gas | % | <=0.5 |
|
| Design life | year |
>=30 |
|
Dimension
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