ZW32-24G Column mounted Vacuum Circuit Breaker Product Overview:
ZW32-24G outdoor high-voltage column vacuum circuit breaker is suitable for three-phase AC 50Hz, rated voltage 12KV and below power distribution systems. It is mainly used for breaking and closing load current, overload current and short-circuit current of lines. It can also be used as a section switch for rural and small power systems. It is an upgraded product for oil-free transformation of urban and rural power grids. It has the characteristics of small size, light weight, anti condensation, and maintenance free, and can adapt to low and harsh weather conditions and polluted environments.

ZW32-24G column mounted vacuum circuit breaker environmental usage conditions:
1. Altitude not exceeding 2000 meters;
2. Surrounding air temperature: -45 ℃~+65 ℃; Daily temperature difference: Daily variation of 25 ℃;
3. Wind speed not exceeding 35m/s;
4. A place without flammability, baozha hazard, chemical corrosion, and severe vibration.

Structural characteristics of ZW32-24G column mounted vacuum circuit breaker:
The circuit breaker consists of a three-phase support and a mechanism box, with a simple and clear structure. The three-phase pillars and current transformers are insulated with outdoor epoxy solid or silicone rubber, which has the advantages of high and low temperature resistance, UV resistance, aging resistance, etc; Adopting a miniaturized spring operated mechanism, the energy consumption for opening and closing is low. The transmission output of the mechanism adopts a spindle sliding mode, with no torque loss, fewer opening and closing transmission components, and high reliability; The current transformer is installed on the outgoing line of the moving end, and the secondary adopts a plug-in structure for easy maintenance and replacement.

Installation, use and maintenance of ZW32-24G column mounted vacuum circuit breaker:
3.1 After opening the box, check whether the insulation cover of the circuit breaker on the column is damaged, and whether the product nameplate and certificate of conformity match the actual product.
Before putting the column mounted circuit breaker into operation, carefully check whether the rated voltage and current of each operating component match the actual situation. And conduct trial operation using the closing and opening methods possessed by the institution to check whether all indicators are correct.
3.3 Circuit breakers can be installed on single poles or double poles (as shown in Figures 2, 3, 4, and 5).
3.4 The circuit breaker on this column ensures long-term maintenance free use for users due to its special design structure.
3.5 Users are not allowed to replace or use electrical components that are inconsistent with the original model specifications at will.
3.6 Operators should have a preliminary understanding of the performance, installation, adjustment, and maintenance knowledge of the mechanism. Any problems encountered during operation should be recorded and the manufacturer should be notified if necessary.

Mechanical characteristics of ZW32-24G column mounted vacuum circuit breaker:
Number Project Unit Value
1. Contact opening distance mm ى ± 1
2 contact overtravel mm ق ± 0.5
3 opening speed m/s ف. 2 ± 0.2
4 Closing speed m/s ـ. 8 ± 0.2
5 contact closing bounce time ms ≤ 2
6-phase Chinese distance mm 𧉔 ± 2
7. Three phase opening and closing asynchrony ms ≤ 2
8. The resistance of each phase's conductive circuit is υΩ≤ 80
The resistance of the conductive circuit of each phase with 9 isolation switches is υΩ≤ 150
10 closing time ms 㺞 -60
11 opening time (excitation trip) ms 㺔 -40
12. Rated power of energy storage motor W 㺨
Main technical parameters of ZW32-12 column mounted vacuum circuit breaker:
ZW32-12 column vacuum circuit breaker model and meaning:

6. Operating principle of ZW32-24G vacuum circuit breaker
6.1 Operating principle of manual mechanism
Closing operation: First, pull the energy storage handle to store energy, and the applied operating torque increases from small to large. When the closing spring passes through the center, the closing spring releases energy, causing the energy storage system to rotate counterclockwise and drive the crank arm to rotate, driving the transmission shaft to close the circuit breaker. At the same time, the opening crank arm buckles the opening half shaft, making the circuit breaker in the closing state; When the mechanism is in the closed state, the cam disengages from the rotating shaft sleeve and the mechanism cannot be closed again.
Opening operation: After the circuit breaker is closed, pulling the opening handle or driving the overcurrent coil when the line current exceeds the set value of the anti surge device causes the opening half shaft to rotate, the opening lever to release, and the transmission rod to open the circuit breaker under the drive of the opening spring.
6.2 Operating principle of electric mechanism
Energy storage operation: Pull the energy storage handle or rotate the energy storage motor, and the cam rotates under the drive of the transmission gear. The closing spring is gradually elongated. When the spring passes through the center, the cam is held by the positioning piece and no longer rotates, and the circuit breaker is in a ready to close state; At the same time, the cam disengages from the drive shaft, preventing the mechanism from storing energy again.
Closing operation: After energy storage is completed, pull the manual closing handle or apply voltage to the closing coil to rotate the closing half shaft, release the closing lever from the closing half shaft, release energy from the closing spring, drive the transmission shaft to close the circuit breaker, and store energy in the opening spring. When the mechanism is in the closed state, the energy storage operation is carried out again, and the closing spring is stretched again. After the spring passes through the center, the closing half shaft is locked by the interlocking device to prevent the mechanism from closing incorrectly. In the closed and stored energy state, the mechanism is in the reclosing state and can achieve a reclosing operation of "O-0.3S-CO" once.
Opening operation: After the circuit breaker is closed, pulling the opening handle or applying voltage to the opening coil or driving the overcurrent coil when the line current exceeds the set value of the anti surge device causes the opening half shaft to rotate, the opening lever to release, and the transmission rod to open the circuit breaker under the drive of the opening spring.
Note: The overcurrent coil of the operating mechanism operates on a short-term working system and cannot pass current for a long time.