Indoor High Voltage Isolate Switch [Vacuum Circuit Breaker] Introduction: Indoor High Voltage Isolate Switch
GN30-12 Series Indoor High Voltage Isolate Switch (hereinafter refers to “isolate switch”) applies to AC 50Hz 12kV voltage power system for opening and closing the unload circuit.
The isolate switch has two types: with or without the ground switch.
Working & Environmental Conditions
1. Environmental temperature: maximum +40°C, minimum -30°C
2. Altitude: ≤1000m (if the altitude rises, the rated insulation level will correspondingly increase.)
3. Relative humidity: daily average value smaller than 95%, monthly average value smaller than 90%
4. No regular dramatic shake
5. Filthy rank: Ⅲ
6. No fire or explosion hazard, serious filthy or chemical corrosion.
Model Meaning
Table I
| Name | Unit | Data | ||
| Rated voltage | kV | 12 | ||
| Rated insulation level | 1min work frequency voltage tolerance | Towards the ground | 42 | |
| Fracture | 48 | |||
| Lightening impact voltage tolerance (peak value) | Towards the ground | 75 | ||
| Fracture | 85 | |||
| Rated current | A | 630；1000；1250；2000；3150；4000 | ||
| 4s rated thermal stable current (RMS) | kV | 20；31；5；40；50 | ||
| Rated dynamic stable voltage (peak value) | 50；80；100；125 | |||
Picture I MGN30-12D/630-1000 Rotary Upper Isolate Switch (point contact) 
Picture II 2GN30-20/2000-4000 Rotary Upper Isolate Switch (only 275MM distance for 4000A)
| Model | H | H1 | W | W1 |
| MGN30-12/2000~3150 | 400 | 725 | 665 | |
| MGN30-12/4000 | 435 | 770 | 705 | |
| MGN30-12D/2000~3150 | 400 | 725 | 330 | 470 |
| MGN30-12D/3000~3150 | 860 | 660 | 350 | 480 |
Complete set switchgear-Power Control System
