Product overview
GND5-12 disconnector has a novel structure. The static contact is installed on the insulator at the top of the cabinet, and the horizontal bus bar is directly connected to the static contact through the installation box, and the moving contact is installed at the incoming end of the circuit breaker.
Model decoding:
GN: Indoor Disconnector.
D: Rotary Blade
5: Design serial number
12: Rated voltage (kV)
Core function
Safety isolation: establish visible fracture to ensure maintenance safety.
No arc extinguishing ability: it is forbidden to operate with load!
Typical application
Bus isolation of 12kV switchgear and overhaul isolation of transformer incoming side (suitable for cabinets such as KYN28A-12 and XGN2-12)
Technical paramete
Parameter | Unit | Standard value | High altitude type |
Rated voltage | kV | 12 | — |
Rated current | A | 630/1250 | 1600 |
Rated short-term withstand current (4s) | kA | 20/25/31.5 | 40 |
Rated peak withstand current | kA | 50/63/80 | 100 |
Dielectric level | |||
Power frequency withstand voltage (1min) | kV | 42 (to ground) / 48 (fracture) | — |
Lightning impulse withstand voltage (peak value) | kV | 75(to ground) / 85(fracture) | — |
Mechanical properties | |||
Closing torque | N·m | ≤150 | — |
Opening torque | N·m | ≤120 | — |
Mechanical life | Frequency | ≥2000 | — |
