JCZR Series Indoor High Vacuum Contactor-Fuse Combination Electric Appliance
Vacuum contactor cart (draw out type vacuum contactor)
This combination electric appliance may install in the switch cabinet to form the F-C loop, use with the integrated protection device. It is used for loading of the switching on and switching off the power pant as well as the industry and mining enterprise, dropout AC high-tension motor, the transformer, capacitor and so on, and it has overload, short circuit protection function. This combination electric appliance may use in AC 50 HZ three-phase power systems.
1. Main Technical Parameter see Table 1.
Rated insulation level 1min power frequency withstand voltage phase to phase, to earth, the fracture impact withstand voltage(fracture)
Fuse rated current
Prospective short circuit breaking current
Prospective short circuit making current(peak value)
Prospective short circuit withstand current( peak value)
Rated short time withstand current( effective value)
Rated short circuit duration
Rated making current
Rated breaking current
Limit breaking current
Contactor distance between fixed and moving contact
2. Closing/open coil technical data see Table 2
Rated operation voltage(V)
Normal work voltage range
85%-110% rated voltage
85%-110% rated voltage
60Z%-120% rated voltage
Requirement for service condition
a) Ambient temperature: +40℃~-15℃, average temperature in 24h limited below +35℃
b) Altitude: Model JCZR-7.2J(D)
When used in rated voltage 7.2kv system, not over 1000m
When used in rated voltage 3.6kv system, not over 3000m
When used in rated voltage 12kv system, not over 1000m
When used in rated voltage 7.2kv system, not over 3000m.
c) The surrounding air free from the pollution of dust, smoke, caustic gas, steam or salt mist.
Relative humidity: The daily average not over 95%m the monthly average not over 90%;
Steam pressure: The daily average not over 2.2Kpa, the monthly average not over 1.8Kpa.
e) The external vibration and earth movement of switch device and control device can be neglected.
In secondary system, the amplitude value of electromagnet interference does not surpass 1.6KV.
Main Structure and Working Principle
4.1 Main structure
4.1.1 The fuse and contactor in the contactor-fuses association electrical apparatus is distributed vertically, and installed on the bottom plate together.
4.1.2 Fuses are installed next to the power of contactor.
4.1.3 After operating the fuse impinges causes the contactor switches off electrically, and cut the switch on loop.
4.1.4 The entering and exit of cart uses the feed screw mechanism that may realize closing operation.
4.1.5 Complete interlock functions and reasonable design.
7.2kv dimensions (the dimensions in brackets is for 12kv)