Outdoor Pole Mounted High Voltage Vacuum Load Switch
Introduction - High Voltage Vacuum Load Switch [Vacuum Circuit Breaker]FZW□-12G/T□, 630 Outdoor Pole Mounted High Voltage Load Switch adopts SF6 gas as the arc chamber and insulation media. It is mainly used in the AC 50 Hz 12 kV rated voltage transmission circuit for opening and closing the load current as well as the partition transformer, unload current and capacitor group current. It also can be used as partition switch. This load switch is configured with spring operation mechanism which can operate manually or electrically. It is applied to frequently used places.
Working & Environmental Conditions - High Voltage Vacuum Load Switch
1. Surrounding air temperature: +40°C~-30°C (below -45°C can be provide for special requirement)
2. Altitude lower than 1000m, 2000m, 3000m
3. Wind pressure smaller than 700Pa(equals to wind speed of 34m/s)
4. Filthy rank lower than IV
5. No regular dramatic shake and earthquake intensity smaller than 8 degree.
Model Meaning
Parameters - High Voltage Vacuum Load Switch [ Vacuum Circuit Breaker]Table One
| Order | Name | Unit | Parameter |
| 1 | Rated voltage | KV | 40.5 |
| 2 | Rated frequency | HZ | 50 |
| 3 | Rated current | A | 1250 |
| 4 | Rated load active breaking current | A | 1250 |
| 5 | Rated closed loop breaking current | A | 1250 |
| 6 | 5%rated active load breaking current | A | 62.5 |
| 7 | Rated cable charge breaking current | A | 25 |
| 8 | Imin work frequency voltage tolerance vacuum fracture/alternated towards the ground/isolated fracture | KV | 95/110 |
| 9 | Lightening impact current tolerance: alternated /towards the ground/isolated fracture | KV | 185/215 |
| 10 | Rated short term current tolerance (thermal stable) | KA | 25 |
| 11 | Rated short circuit duration time | S | 4 |
| 12 | Rated peak value current tolerance (dynamic stable) | KA | 63 |
| 13 | Rated short circuit closing current | KA | 63 |
| 14 | Mechanical life span | Times | 10000 |
| 15 | Vacuum arc chamber contact allowed accumulated attrition thickness | Mm | 0.6 |
| 16 | Manual operation torque | Nm | ≤300 |
| 17 | Weight | kg | 500 |
Table Two
| Order | Name | Unit | Parameter |
| 1 | Contact openness size | Mm | 13±1 |
| 2 | Average Switch opening speed | M/s | 1.4±0.2 |
| 3 | Different periods of three-phase Switch opening | Ms | ≤5 |
| 4 | Different periods of three-phase Switch closing | Ms | ≤2 |
| 5 | Inter and relative distances of charged objects | Mm | ≤420 |
| 6 | Auxiliary circuit resistance | µΩ | 400≥R≤1000 |
| Order | Name | Unit | Parameter |
| 1 | Isolate knife pressure | N | 500±50 |
| 2 | Distance between the final end of the contact knife and the static contact small fracture/large fracture | Mm | ≥180/420 |
| 3 | Resistance of the access and outlet terminals | µΩ | ≤150 |
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