ZW43 Vacuum Circuit Breaker Series Model:
ZW43-12/630-12.5 ZW43-12/630-20 ZW43-12/1250-25 ZW43-12/T630-12.5 ZW43-12/T630-20 ZW43-12/T1250-25 ZW43-12G/630-12.5 ZW43-12G/630-20
ZW43-12G/1250-25

ZW43 vacuum circuit breaker model and meaning
ZW43 Vacuum Circuit Breaker Product Overview:
ZW43-12F column vacuum circuit breaker is an outdoor high-voltage switchgear with three-phase AC 50Hz and rated voltage of 12kV. Suitable for breaking and closing load current, overload current, and short-circuit current in urban or rural distribution systems. ZW32-24, ZW32-24G outdoor high-voltage vacuum circuit breaker ZW32-24/630-20 outdoor high-voltage vacuum column dry-type circuit breaker (hereinafter referred to as the circuit breaker) is a control and protection equipment in the rated voltage 24KV, 50HZ AC three-phase high-voltage distribution network. Mainly used for breaking and closing load current, overload current, and short-circuit current in power lines. Suitable for protection and control in power distribution systems of substations and industrial and mining enterprises. This circuit breaker adopts a column type, dry-type structure, with reliable insulation, long electrical life, and maintenance free, especially suitable for the requirements of frequent operating places. It is more suitable for installation and use in rural power grids with weak maintenance and repair capabilities. Complies with the requirements of GB1984 AC High Voltage Circuit Breakers, GB1985 AC High Voltage Disconnectors and Grounding Switches, DL/T402, DL/T4.3, and enterprise standard OHX.520.701.

Main technical parameters of ZW43 vacuum circuit breaker:
Rated voltage: 12KV
Rated frequency 50 Hz
3 rated current 630 A
4 rated short-circuit breaking current 20KA
5 rated peak withstand current peak value 㺲 KA
6 rated short-term durability withstand current of 20 KA
7 rated short-circuit closing current peak value 㺲 KA
8. Mechanical lifespan of 10000 time
9 rated short-circuit breaking current breaking times 30 times
10 power frequency withstand voltage for 1 minute: wet dry phase, ground/fracture 30/42/48 KV
11 Lightning impulse withstand current peak phase to phase, ground/fracture 75/85 KV
12 Secondary Circuit 1min Power Frequency Withstand Voltage 2KV

ZW43 Vacuum Circuit Breaker Serial Number Project Parameters:
1 contact opening distance ى ± 1 mm
2 contacts overtravel by 2 ± 0.5 mm
3. Opening speed 1.0 ± 0.2 m/s
4 Closing speed ـ. 6 ± 0.2 m/s
5 contact closing bounce time ≤ 2 ms
6-phase center distance 340 ± 1.5 mm
7 Three phase opening and closing asynchrony ≤ 2 ms


ZW43 vacuum circuit breaker operation:
1. The circuit breaker has undergone a new miniaturization design, adopting a fully enclosed structure and unique arc extinguishing chamber packaging technology, with good sealing performance, which helps to improve moisture resistance and condensation prevention
Performance, suitable for use in high temperature and humid areas.
2. The circuit breaker has stable and reliable breaking performance, with characteristics such as no combustion, safety, maintenance free, small size, light weight, and long service life.
3. The circuit breaker can be equipped with a two-phase CT to output two-phase current for functional control and information analysis, achieving overcurrent protection function.
4. The circuit breaker is equipped with a closing surge elimination device (composite controller), which can not only avoid misoperation caused by surge, but also release the current during normal operation
The coil is not charged, which may cause misoperation due to the shaking of the release device.
5. The circuit breaker can also be equipped with an intelligent switch controller, which has multiple protection functions such as three-stage current protection, zero sequence protection, reclosing, and quick break protection. It supports
Multiple communication protocols allow for the use of multiple communication methods to form a communication network, enabling local manual or remote control of switches, as well as remote control through the communication network
Fang remote control, if equipped with corresponding recloser or segmenter control devices, can be used as a recloser or segmenter.
6. The operating mechanism is sealed inside the switch box, which can effectively prevent the switch from rusting due to long-term outdoor environment.
7. The operating mechanism is novel, simple, reliable in operation, small in size, and has a mechanical lifespan of up to 10000 times.

Working principle of ZW43 vacuum circuit breaker
1. Energy storage process
Pull the manual energy storage pull ring of the mechanism, or provide an electric energy storage signal to the mechanism. The motor drives the energy storage lever to store energy in the energy storage spring, and the energy storage is maintained through the energy storage holding link
Hold onto this energy.
2. Closing process
When closing, pull the manual closing pull ring of the mechanism or give the mechanism an electric closing signal. The energy of the closing spring is released, and the output shaft of the mechanism rotates through the crank arm
The connecting rod drives the moving contact of the arc extinguishing chamber to move upward, coming into contact with the stationary contact and providing contact pressure. At the same time, it stores energy for the opening spring and maintains the ring through the closing of the mechanism
Connect the circuit breaker normally to keep it closed.
3. Opening process
Opening chamber, pull the mechanical manual opening pull ring or the mechanism electric opening signal, the closing button of the mechanism will be released, and the contact pressure spring and opening spring will be released
Under the action of, the output shaft of the mechanism rotates in the opposite direction, and through the connecting rod and crank arm, the contact of the arc extinguishing chamber moves downward, causing the static contact to separate and the circuit breaker to open. Open state
The opening spring of the state point switch remains.
4. Overcurrent protection process
Configure a circuit breaker with an electro-hydraulic transformer. When the current flowing through the main circuit of the circuit breaker exceeds the rated value of the transformer, a 5A current is output through the secondary side of the transformer to drive it
Internal overcurrent release and circuit breaker opening of the institution.