CKWF-12 Intelligent Outdoor Vacuum Load Switch-East Union Energy (Shenzhen) Technology Co., Ltd.

Performance Advantages

Safe & Reliable: The switch adopts vacuum arc extinction and zero-gauge-pressure SF₆ gas insulation, improving both breaking performance and the insulation and corrosion resistance of internal components. Both the arc-extinguishing and insulating media are oil-free. Even in the event of accidental internal faults, no high-temperature gas or splashes will leak or escape.
Stable Performance: Equipped with two internal breaks, including a disconnector and a vacuum interrupter, the switch meets the safe operation requirements of power utilities and greatly enhances operational safety. The main circuit and operating mechanism are hermetically sealed in an SF₆ gas-filled tank, making the product unaffected by external service environments and maintenance-free.
High Compatibility: The switch can be equipped with various built-in through-core current transformers for measurement, protection and metering. It also adopts high-grade fully sealed aviation connectors, providing highly reliable interfaces for distribution automation.
Rational Structure: The switch features a well-designed structure and flexible installation methods, supporting both pole-mounted suspension and base mounting. It supports electric and manual operation for flexible switching control. Its electromagnetic operating mechanism enables power-assisted closing, low-power electrical holding, and power-loss tripping, with a simple and reliable structure.

Technical Parameters

Item Name	Sub-item 1	Sub-item 2	Unit	Parameter
Rated Voltage			kV	12
Rated Insulation Level	1-min Power Frequency Withstand Voltage	Phase-to-Phase 、Phase-to-Ground	kV	42
		Break		48
	Lightning Impulse Withstand Voltage	Phase-to-Phase 、Phase-to-Ground		75
		Break		85
Rated Current			A	630
Rated Frequency			Hz	50
Rated Short-time Withstand Current			kA	20
Rated Peak Withstand Current (Peak Value)			kA	50
Operating Voltage			V	AC220V (85%~110%)
Rated Gauge Pressure of SF₆ Gas			MPa	0
Manual Force of Operating Handle			N	200
Main Circuit Resistance			μΩ	≤130 (Terminal Type) / ≤900 (Cable Type)
Closing Time			ms	120~180
Closing Current (Peak Value)			A	<17
Contact Closing Bounce Time			ms	<10
Holding Current			A	0.35-0.45
Minimum Closing Voltage			V	120~160
Opening Time			s	≤1.5
Contact Opening Non-synchronous Time			ms	≤3
Minimum Holding & Closing Voltage			V	65~85
Time Difference Between Opening/Closing of Isolation Break and Vacuum Interrupter			ms	>10
Power Loss			W	>10
Air-tightness Test (Leak Detection)			MPa	No air leakage at gauge pressure 0.02
Contact Gap of Vacuum Interrupter			mm	7~9
Contact Over-travel of Vacuum Interrupter			mm	2~4
Gap of Isolation Break			mm	20~30
Over-travel of Isolation Break			mm	2~4
Operating Mode			/	-
Net Weight			kg	185