Outdoor High Voltage PM Vacuum Circuit Breaker
Introduction - Outdoor High Voltage PM Vacuum Circuit BreakerZW32 -12/M630-20 Outdoor High Voltage PM Vacuum Circuit Breaker is an outdoor high voltage power distribution device for three-phase AC 50Hz 630A~1250A rated current 16KA~20KA short circuit current. It is mainly used in opening and closing the load current, overload current and short circuit current of the power system. It suits for industrial mining enterprises power distribution system for protection and control as well as rural network and other frequently operated places. It has kept al the reasonable parts of the former ZW32 structure and all its excellent performances, which multiplies the overall mechanical life span including the arc chamber. It can be used for sixty thousand times and thirty times free of maintenance.
Working & Environmental Conditions - Vacuum Circuit Breaker
1. Surrounding air temperature: -40°C~+55°C, daily temperature difference: 25°C
2. Altitude: lower than 2000m
3. Wind pressure: smaller than 700Pa (equals to wind speed 35m/s)
4. No regular dramatic shake, earthquake intensity should smaller than 8 degree.
5. No strong corrosion gas or medium (such as acids, alkali and heavy smoke )
6. Anti-filthy rank: Ⅳ
Model Meaning
Main Technical Parameters - High Voltage PM Vacuum Circuit Breaker Table I
| Order | Name | Unit | Parameter | ||
| 1 | Rated voltage | KV | 12 | ||
| 2 | Rated current | A | 630/1250 | ||
| 3 | Rated frequency | Hz | 50 | ||
| 4 | Imin work frequency voltage tolerance | Dry test | KV | 42/49 | |
| Wet test | 30 | ||||
| 5 | Lightening impact current tolerance (peak value) alternated, towards the ground/fracture | KV | 75/85 | ||
| 6 | Rated short circuit breaking current | KA | 20 | ||
| 7 | Rated short circuit closing current (peak value) | KA | 50 | ||
| 8 | Rated peak value current tolerance | KA | 50 | ||
| 9 | 4S short term current tolerance | KA | 20 | ||
| 10 | Rated operation cycle | Open-0.3s-slose-open-180s-close-open | |||
| 11 | Rated times of short circuit breaking current | Times | 30 | ||
| 12 | Mechanical life span | Times | 50000 | ||
| 13 | Secondary circuit I min work frequency voltage tolerance | KV | 2 | ||
| 14 | Protection CT | Ratio | A | 5 | |
| Capacity | VA | 15 | |||
| 15 | Weight | Kg | 100 | ||
| Order | Name | Unit | Parameter |
| 1 | Contact openness size | Mm | 11±1 |
| 2 | Contact excess travel | Mm | 3+1.0-0.3 |
| 3 | Average Switch closing speed | M/s | 0.65±0.15 |
| 4 | Average Switch opening speed | M/s | 1.1±0.2 |
| 5 | Differences of three-phase Switch opening at the same period | Ms | ≤2 |
| 6 | Switch closing and bouncing time | Ms | ≤2 |
| 7 | Switch closing time | Ms | ≤60 |
| 8 | Switch opening time | Ms | ≤70 |
| 9 | DC resistance of each phase circuit | µΩ | ≤200 |
| 10 | Dynamic, static contacts allowed accumulated attrition thickness | Mm | 3 |
Picture I ZW32-12/M630-20 Contour & Installation Dimensions
1 Insulate cover cylinder
2 Vacuum arc chamber (inside the cover tube)
3 Hoist ring
4 Switch opening and closing handle
5 Energy storage handle
6 The box
7 PM (inside the box)
8 Switch opening and closing instruction
9 Aviation plug
10 Electric sensor
Picture II MZW32-12G/M630-20 (with isolate switch) Contour & Installation Dimensions1 Isolate knife
2 Insulate pull bar
3 Insulator
4 Static contact
5 isolate switch support
6 Isolate switch operation handle
7 Isolate switch support
8 Interlock bar
Back
Complete set switchgear-Power Control System
