ZW8-12 Series outdoor high-voltage vacuum circuit breaker

Product description ZW8-12 series outdoor high-voltage vacuum circuit breaker is a kind of three-phase outdoor high-voltage switchgear of rated voltage 12kV and AC 50Hz.Its population structure is three-phase together box type. Three-phase vacuum arc

Published in2018-08-04

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Detailed description

Product description

ZW8-12 series outdoor high-voltage vacuum circuit breaker is a kind of three-phase outdoor high-voltage switchgear of rated voltage 12kV and AC 50Hz.
Its population structure is three-phase together box type. Three-phase vacuum arc-extinguish chamber palaces in a metal cabinet, using the SMC insulating material to insulate inter-phase and phase to earth, which is reliable in performance and high in insulating intensity.

ZW8-12G is combined with ZW8-12 circuit breaker and isolating sword, called combination circuit breaker and used as a section switch.

High-Voltage Vacuum Circuit Breaker (VCB ZW8-12, ZW8-12G)

Main technical data

Item			Unit	Parameter
Rated Voltage			kV	12
Rated Current			A	630
Rated Short-circuit Breaking Current			kA	6.3	12.5	20
Rated Short-circuit Making Current (Peak)			kA	16	31.5		50
Rated Peak Withstand Current			kA	16	31.5		50
Rated Short-time Withstand Current			kA	6.3	12.5		20
Rated Insulation Level	1min Power Frequency Withstand Voltage (Dry Test)		kV	42
	Lightning Impulse Withstand Voltage (Peak)		kV	75
Rated Operating Sequence				O-0.3s-C O-180s-CO
Mechanical Life			times	10000
Rated Short-circuit Current Breaking Times			times	30
Rated Closing Voltage of Operator			V	110, 220
Rated Opening Voltage of Operator			V	110, 220
Clearance Between Open Contacts			mm	11± 1
Over travel of Contacts			mm	3
Three-phase Opening/Closing Synchronization			ms	≤ 2
Closing Bouncing Time			ms	≤ 2
Average Opening Speed			m/s	1.0± 0.2
Average Closing Speed			m/s	0.7± 0.15
Opening Time		Highest Operating Voltage	s	0.015~0.05
		Lowest Operating Voltage	s	0.03~0.06
Closing Time			s	0.025~0.05
Main Loop Resistance of Each Phase			μ Ω	≤ 120
Total Thickness of Permissible Wear of Moving and Static Contacts			mm	3

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ZW8-12 Series outdoor high-voltage vacuum circuit breaker

Detailed description