Ring Main Unit Switchgear

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Products details

Publish time 2021-08-26 11:06

SF6 gas insulated ring main unit is integrating with SF6 infill cabinet which gather with LBS, Fuse, ES, DS, etc.

By the perfect integration of stationary type and flexible expansion,
SF6 gas-insulating compact close metal switchgear(Ring main unit) with the adoption of the modular
design, is suitable for end-user or network node, meanwhile meets the requirement of
all kinds of switching substations?cabinet-type transformer substations and cable
branch cabinets. It characters on its compact structure, safety and reliability,longevity
and maintenance free.
This product is in conformity with the standards of IEC60420,GB/T11022,GB3804,GB3906

Description		Unit	LBS unit	Switch-fuse unit	VCB unit
Rated voltage		kV	24	24	24
Power frequency withstand voltage (1min)	Phase to phase/earth	kV	50	50	50
Power frequency withstand voltage (1min)	Across the isolating distance	kV	60	60	60
Impulse withstand voltage	Phase to phase/earth	kV	125	125	125
Impulse withstand voltage	Across the isolating distance	kV	145	145	145
Rated frequency		Hz	50, 60	50, 60	50, 60
Rated current		A	630	125	630
Rated short circuit breaking current		kA		31.5	20
Rated short time withstand current		kA/s	20/3		20/3
Rated peak withstand current		kA	50		50
Rated short circuit making current		kA	50	80	50
Rated transfer current		A		1400
Rated active load breaking current		A	630
Rated closed loop breaking current		A	630
Mechanical lifetime		Ops.	5000	5000	10000
Annual leakage rate			＜0.02%