Vacuum Circuit Breakers

KEY WORDS:High pressure vacuum switch



ZW58-12/24 model outdoor AC vacuum circuit breaker is used to make and break
load current, overload current and short-circuit current in 12/24kV, 50/60Hz power
system. It is applicable for substations, industry and mining,
urban and rural electricity power networks, especially for occasions with frequent
operation and automatic power distribution network. It accords with the standard of
IEC622 71-100 & GB1984: AC high voltage circuit breaker, IEC60694 & GB/T11022:
HV General technical requirement of switch and control apparatus
1. Strong breaking capability.
2. High level of insulation.
3. Long service life time.
4. Good pollution resistance.
Techincal data:

N0. Test Item Unit Data
1 Rated voltage kV 12 24
2 Rated current A 630/1250 630/1250
3 Rated frequency Hz 50/60 50/60
4 Rated short-time withstand current kA 25 25
5 Rated short-circuit duration s 4 4
6 Rated active load breaking current A 630/1250 630/1250
7 Rated loop breaking current A 630/1250 630/1250
10 Rated short-circuit making current kA 50 50
12 power frequency withstand voltage against the earth, between phases kV rms 40 65
13 power frequency withstand voltage against the isolating distance kV rms 48 79
14 Lightning impulse withstand voltage against the earth, between phases (peak) kV 75 125
15 Lightning impulse withstand voltage against the air gap(peak) kV 85 145
16 Mechanical life Times 10000 10000

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