GW7-252 OUTDOOR HIGH VOLTAGE AC DISCONNECTING SWITCHES
Product Overview
GW7-252 disconnecting switch is a three-phase AC 50Hz outdoor high-voltage AC electrical appliance, used in a 220kV power system with a rated voltage. It is used for high-voltage lines to switch lines under no current-carrying conditions, and for the maintenance of high- voltage buses, circuit breakers and other electrical equipment and live High-voltage lines are electrically isolated to provide a visible insulation distance that meets the requirements for the equipment and maintenance personnel to be inspected to ensure the safety of maintenance personnel.
The product complies with GB1985 and IEC62271- 102 standards
Working Environment
1. The altitude does not exceed: 2000m
2. Ambient temperature: -40℃ ~+40℃
3.Maximum wind speed: 34m/s
4. Anti-seismic ability: horizontal acceleration: 0.250g; vertical：0.125g acceleration: 0.125g
5. The thickness of icing does not exceed 10mm
6. Insulator pollution level: Ⅲ (25mm/kV), Ⅳ (31mm/kV)
7. There should be no flammable, explosive,chemical corrosion and
Main Technical Parameters
| No. | Item | Unit | Data | ||
| 1 | Rated voltage | kV | 252 | ||
| 2 | Rated current | A | 5000 | ||
| 3 | Rated peak withstand current (peak) | kA | 160 | ||
| 4 | 3s rated short-time withstand current (valid value) | kA | 63 | ||
| 5 | Rated frequency | Hz | 50 | ||
| 6 | Grounding switch | Rated peak withstand current (peak) | kA | 160 | |
| 3s rated short-time withstand current (valid value) | kA | 63 | |||
| 7 | Terminal rated pull force | Longitudinal | N | 1500 | |
| Horizontal | N | 1000 | |||
| Vertical | N | 1250 | |||
| 8 | Rated insulation level | Rated short-time withstand current (valid value) | To earth | kV | 460 |
| Fracture | kV | 460+145 | |||
| Lightning impulse withstand voltage (peak) | earth | kV | 1050 | ||
| racture | kV | 1050+200 | |||
| 9 | Grounding switch induced currentswitching capability test | Electromagnetic coupling | Rated inductive current | A | 80 |
| Rated inductive voltage | kV | 2 | |||
| Electrostatic coupling | Rated inductive current | A | 3 | ||
| Rated inductive voltage | kV | 12 | |||
| 10 | Post insulator creeping ratio distance | Ⅲ | mm/kV | 25 | |
| Ⅳ | mm/kV | 31 | |||
| 11 | Mechanical life | Times | 3000 | ||
| 12 | Disconnecting Switch Circuit Resistance | μΩ | 50 | ||
| 13 | Open and close bus conversion current | A | 1600 | ||
| 14 | Single pole weight | kg | 1020 | ||
Appearance And Installation Dimensions
