Gold Member Since 2015
Audited Supplier

Mingde Electrical (Shanghai) Co., Ltd.

Vacuum Circuit Breaker, Switchgear, Earthing Switch manufacturer / supplier in China, offering Vmd 40.5 Kv -1250A Handcart Vacuum Breaker Embedded Pole Types, Pole Mounted 17.5kv-1250A 50Hz Vs1 Vacuum Circuit Breaker, Spout MD/250 with APG Technology and so on.

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Supplier Homepage Company Show Main Products ZW 32

Main Products

ZW 32 [Jan 15,2016]
ZW 32
Product Overview

1. Summary

        ZW32-24 type outdoor high voltage vacuum circuit breaker is three-phase AC,50(60)Hz outdoor power distribution equipment with the rated voltage of 24kv,Used to open and close the load current,over load current,and short circuit current in the electric power system. Also used to protect and control the circuit in substation,mining and industrial enterprises, and frequently used in the operation places such as rural power network. 

2. Using Environmental Condition 

A. The altitude above sea level does not over 2,000 meters; 
B. Surrounding air temperature: -40 ºC ~+40 ºC ; 
C. The wind speed is not bigger than 34m/s; 
D. The air filthy should be with in III degree
E. Installing places: Not flammable, the explosion hazard, chemistry corrode place; 
F. Does not have the regular fierce vibration

3. Technical Parameter


Table 1  Circuit Breaker's Main Technical Data
1Rated voltagekV1224
2Rated frequencyHz5050
3Rated currentA630/1250630/1250
4Rated short circuit breaking current kA20/2520/25
5Rated peak withstand current kA50/6350/63
6Rated short time withstand current/ lasting timekA/s20/4 ,25/420/4 ,25/4
7Rated short circuit closing current(peak) kA50/6350/63
8Rated operating sequence O-0.3s-CO-180s-CO
9Mechanical life 1000010000
10Rated short circuit breaking current breaking times 5020
111min power frequency withstand current(wet)kV34/3650/64
12Lightning impulse withstand voltage(peak)kV75/85125/145
13Secondary circuit power frequency withstand voltage (1min)V20002000

Table2 Circuit Breaker's Main Mechanical Data
1Clearance between contactsmm9±112±1
2Contact's overtravelmm2.5±0.53.5±1
3Open speedm/s1.4±0.21.4±0.2
4Closing speedm/s0.7±0.20.7±0.2
5Contact closing jumping time ms≤2≤2
6Pole center distancemm340±1.5380±1.5
7Three pole open/close non-simultaneity ms≤2≤2
8Each pole conducting circuit resistance μΩ≤70≤70
9Closing timems25-6025-60
10Open timems20-6020-60
11Motor's rated power w4040

4. Outline Dimension Drawing