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Vacuum Circuit Breakers (ZN12-12, ZN■ -40.5 type indoor)
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Summarize
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ZN12-12 series type indoor vacuum circuit breaker is HV indoor switchgear with rated 12Kv, Tri-phase AC50Hz, and product is introduced the Germany technology.
Circuit breaker is easy in structure; closing ability is strong, with long life, convenient for maintenance, explosion-proof, available for operating function, which is applicable to controlling and protecting switch of power plant and substation, in particular, suitable for place of closing important load and frequent
operation.
The product conforms to GB1984-89standard. |
Main technical specifications:
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Type
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Unit
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Type
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l
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ll
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lll
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l
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ll
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Rated voltage
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kV
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12
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12
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12
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40.5
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40.5
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Rated current
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A
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1250
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1600
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2000
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1600
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2000
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Rated short circuit breaking current
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kA
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31.5
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31.5
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31.5
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25
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31.5
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Dynamic stable current (peak value)
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kA
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100
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100
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100
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4S thermal stable current(50kAis 3s)
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kA
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31.5
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31.5
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31.5
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25
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25
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Rated short circuit closing current
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kA
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100
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100
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100
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80
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80
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Rated short circuit current breaking time
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Time
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50
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20
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Rated operating sequence
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Break-0.3s-close and break-180s-close and break
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Lighting shock withstand voltage (absolute wave)
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kV
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75
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185
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Rated short time P>F withstand voltage(1min)
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kV
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42
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95
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Switch-off time
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ms
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≤75
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50~85
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Swi tch-on time
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ms
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≤60(50)
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40~85
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Mechanical life
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Time
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20000(1~1V)10000(V~X)
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120000
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Rated short circuit current breaking time
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Time
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20000(1~1V)10000(V~X)
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20
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Energy storing motor power
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W
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~275
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275
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Energy storing motor rated voltage
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V
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~110,220
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~110,220
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Energy storing time
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s
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≤15
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≤15
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Switch-on electro-magnet rated voltage
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V
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=110,220
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~110,220
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Switch-off electro-magnet rated voltage
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V
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=110,220
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~110,220
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Energy storing activated unlocking device rated voltage
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V
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~110,220
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~110,220
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Switch-on interlock devicer ated voltage
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V
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~110,220
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~110,220
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Voltage-loss interlock devicerated voltage
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V
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~110,220
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~110,220
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Over current interlock devicerated current
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A
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5
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5
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Auxiliary switch rated current
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A
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AC10DC5
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DC10
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Travel of contact
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mm
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11+1
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20+2
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Over travel of contact
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mm
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8+2
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5+1
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Switch-on speed
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m/s
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0.6~1.8
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0.8~1.4
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Switch-off speed
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m/s
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1.0~1.8
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1.1~1.8
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Bounce time of contact switch-on
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ms
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≤2
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≤3
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Central distance of poles
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mm
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210 1.5(280+1.5)
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350+1.5
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Same period of three phase switch-off on
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ms
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≤2
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≤2
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Each phase primary feedback circuit resistance
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μΩ
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≤35
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≤45
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