Description
Conforming to GB3906 standard, the KGN-12 metal clad fixed switchgear is used in the three-phase AC single busbar or main - bus sectionalizing system with the rated voltage of 3.6 to 12 KV and the rated frequency of 50Hz. It is applicable to the power distribution in the substation, power plant, as well as industrial and mining enterprises.
| Item | Data | |
| Rated voltage (KV) | 3.6, 7.2, 12 | |
| Rated frequency (Hz) | 50 | |
| Rated current of main bus (A) | 630, 1250, 1600, 2000, 2500, 3150 | |
| Rated current of branch bus (A) | 630-3150 | |
| Power frequency withstand voltage (KV) | 42 (phase to phase, phase to ground) | 48 (fracture to fracture) |
| Lightning impulse withstand voltage (KV) | 75 (phase to phase, phase to ground) | 85 (fracture to fracture) |
| Auxiliary control circuit (V) | 2000 | |
| Rated breaking current (valid value) (KA) | 20, 25, 31.5, 40 | |
| Rated making current (peak) (KA) | 50, 63, 80, 100 | |
| Thermal stability current (KA/4s) | 20, 25, 31.5, 40 | |
| Protection grade | IP3X | |
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