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| Model | GM2-1250 | |||||
| Number of poles | 3 | 4 | ||||
| Control | Manual | Toggle | ■ | |||
| Connections | Fixed | Front connection | ■ | |||
| Rear connection | ■ | |||||
| Electrical characteristics as per IEC60947-2 and GB14048.2 | ||||||
| Rated current(A) | In | 50℃ | 1250 | |||
| 65℃ | 1000 | |||||
| Rated insulation voltage(V) | Ui | 750 | ||||
| Rated impulse withstand voltage(KV) | Uimp | 8 | ||||
| Rated operational voltage(V) | Ue | AC 50/60Hz | 690 | |||
| Type of circuit breaker | N | |||||
| Ultimate breaking capacity (KA rms) | Icu | AC 50/60Hz | 400V | 50 | ||
| Service breaking capacity | Ics | %Icu | 75% | |||
| Short-time withstand current (KA rms) V AC 50/60Hz | Icw | 0.5s | 25 | |||
| 1s | 17 | |||||
| Suitability for isolation | ■ | |||||
| Utilization category | B | |||||
| Max. demand current (C-O cycles) | Mechanical | 50000 | ||||
| Electrical | 440V | In/2 | 5000 | |||
| In | 4000 | |||||
| 690V | In/2 | 3000 | ||||
| In | 2000 | |||||
| Pollution degree | III | |||||
| Protection | ||||||
| Interchangeable control units | Electronic type(STK5.0) | |||||
| Overload protection | Long time | Ir(In×...) | ■ | |||
| Short-circuit protection | Short time | Isd (Ir×...) | ■ | |||
| Instantaneous | Ii(In×...) | ■ | ||||
| Control auxiliaries | ||||||
| Auxiliary switch | ■ | |||||
| MX shunt and MN undervoltage winding | ■ | |||||
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