1. Model
K---------------------------------------metal-clad
Y---------------------------------------withdrawable
N---------------------------------------Indoor
10--------------------------------------design No.
40.5-------------------------------------rated voltage (KV).
2. General
KYN10-40.5 drawout metal-clad switchgear is a state product. It is widely used in the single bus power system of three-phase, 50HZ, AC rated voltage 40.5KV to receive and distribute power in the power plants, power substation and the mining and industrial enterprise. And it controls, protects, and monitors the circuit. The switch cabinet is not only widely used in the normal power system but also used in the frequently operated power circuit.
The frame of the cabinet is metal-clad and metal-enclosed, and the cabinet applies the high-quality welding plate. The shell protection level is IP3X. The switch cabinet is single side and not against wall installation. The inner is with high performance of SF6 or vacuum circuit breaker. The main circuit applies the heat shrinkable insulating bus bushing, the layer and contactors are good insulated and small-sized, and the handcart is with feed mechanism and reliable positioning device. The inner has the reliable five-defense mechanical interlocking device to ensure the safe and reliable operation. The switch cabinet complies with the standard of GB3906 and IEC-298.
3. Technical parameters
Item | Unit | Value |
Rated voltage | KV | 40.5 |
Rated insulation level | 1 min power frequency withstand voltage | KV | Phase-phase Phase-earth | Isolation fracture |
95 | 118 |
Rated lightning impulse withstand voltage | 185 | 215 |
Rated short-time withstand current (4S) | KA | 20, 25, 31.5 |
Specified short circuit drop-out current | KA | 20, 25, 31.5 |
Rated withstand current (peak) | KA | 50, 63, 80 |
Rated short circuit making current | KA | 50, 63, 80 |
Rated current | A | 1250-2500 |
