RMU HV AC metal closed ring switch

RMU fixed metal closed switchgear is suitable for AC 50HZ, 10KV network as a breaking load and short circuit and close short circuit current.

General:

The ring cabinet is equipped with manual and electric spring mechanism to operate the vacuum circuit breaker switch, and the ground switch and isolation switch are equipped with manual operation mechanism.

Service Environment

The upper limit of the ambient temperature is +40℃ and the lower limit is -25℃
The altitude cannot exceed 1000m
The daily average relative humidity of air is less than 95%, and the monthly average is less than 90%. The daily mean value of water vapor is not greater than the monthly mean value
The surrounding air is not significantly polluted by corrosion or flammable gases and water vapor
No frequent violent vibration
Key Feature
The ring screen cabinet uses air as the insulating medium
The inlet and outlet cabinets are equipped with insulating protective partitions interlocked with ground switches
To meet the "five defense" requirements, the cabinet shell protection level is IP2X

Technical Data

Name				Unit	Data
Rated voltage/Maximum operating voltage				KV	10/12
Rated current				A	1250
Main bus current	Incoming cabinet			A	1250
	Outlet cabinet				1250
Rated short-time withstand current				KA	31.5
Rated short-circuit duration				S	4
Rated peak withstand current				KA	50
Rated short-circuit closed current				KA	50
Rated active load breaking current				A	1250
closed-loop breaking current				A	1250
Rated cable charging current				KA	31.5
Rated short-circuit withstand current of the grounding switch				KA	31.5
Rated short-circuit duration of the ground switch				S	4（2）
Rated peak withstand current of the ground switch				KA	50
Rated short-circuit closing current of the ground switch				KA	50
Rated 1min power frequency withstand voltage	Phase to phase、phase to earth、Vacuum load switch contact			KA	42
	Disconnecting switch contact				48
Rated lightning impulse withstand voltage		Phase to phase、phase to earth、Vacuum load switch contact		KA	75
		Disconnecting switch contact			85
Mechanism life			Vacuum load switch	Times	10000
			earthing switch（knife）、Disconnecting switch（knife）		2000
				A	3150