Indoor high voltage vacuum load switch fuse combination appliance

Vacuum load switch and composite apparatus, suitable for three-phase AC 50Hz ring network or terminal power supply and industrial electrical equipment, for load control and short circuit protection use, load switch open and close the closed loop current, no-load transformer and cable charging current, composite apparatus can break any current till rated short circuit current. Adopt the straight move or isolating fracture and vacuum interrupter linkage. With function of manual and electric operation.

General:

Load switches and combination appliances are suitable for load control and short circuit protection in three-phase ring network or terminal-supplied urban distribution power stations and industrial electrical equipment. Because the combination of electrical appliances for transformers and other electrical equipment protection than open circuit more reliable, more economical, especially suitable for ring network, double radiation power supply unit and box type substation.

Technical Data

The ambient temperature: -25℃-+40℃, alpine region,≥-40℃
The altitude:≤1000M
Relative humidity: daily average value is not greater than 95%, monthly average is not greater than 90%
Earthguake intensity: ≤8 degree
The surrounding air is not corrosive and flammable gas, steam and other significant pollution
Contamination grade: Il class
Key Feature
Unique transmission structure design, arc extinguishing chamber only at the moment of closing and breaking withstand high pressure, so small volume and light weight.
It can realize one-time operation of isolation fracture and interrupter fracture.
Between the static contact and the moving contact head guide torch, there is a grounding valve linked with the grounding switch, which not only ensures safety but also facilitates maintenance.

Name		Unit	Data
			FZN25-12D/T630-20	FZRN25-12D/T125-31.5
Rated voltage		kA	12
Rated frequency		Hz	50
Rated Current		A	630		125
Rated insulation level	1min frequency voltage	KV	Interr upter Fracture30.on the ground, white 42.solation Fracture48
	Lightning impulse withstand voltage	KV	On the ground, white 75 solation Fracture85
Rated dynamic stability current (peak)		KA	50		-
4Sthermal current		KA	20		-
Rated active load breaking current		A	630		125
Rated closed-Loop breaking current		A	630		125
Rated cable charging breaking current		A	10		10
Breaking load transformer		KVA	1250		1250
Rated short-circuit breaking current		KA	-		31.5
Rated transfer current,rated current transfer		A			2000
Fuse Model			-		SDLAJ-12SFLAJ-12
Impact energy output		J	-		2-5
Rated short circuit making current		KA	50
Ground switch rated Dynamic current			50
Grounding switch 2Sthermal current		KA	20
Secondary circuit Rated voltage		V	AC/CD220;110
Mechanical life		times	1000