FZN25-12 Indoor load break switch (LBS) 12KV

FZN25-12D/T630-20 Type Indoor AC high voltage load switch is three-phase AC 50Hz, rated voltage of 12kV and indoor installations, for industrial and mining enterprises for distribution in clinics and substations and other occasions, as electrical protection and control facilities for the division and load current, loop current, no load transformer and cable charging current.

As the combination of electrical transformers and other electrical equipment on the protective effect than the circuit more reliable, more economical, especially for rings, double radiation power supply units and box-type substation.

Product Detail

Product overall structure in the form of operator arrangement in the primary loop on the side.(according to user requirements to provide the primary loop right and left side or the form of positive).Leading electrical part by insulation cover, static contact, coils, vacuum arcing chamber, such as flow fuse combination also electrical appliances co., LTD., with short circuit protection function.

Environment condition

The altitude: under 1000M.
The ambient temperature: -25℃-+40℃.
The relative humidity of air: monthly≤90%, daily≤95%.
Amplitude: Earthquake degree 8.
Application occasions should free from fire, inflammables, explosives, corrosives and severe vibration.

Technical parameter

No.	Item		Unit	Value
1	Rated voltage		kV	12
2	Rated frequency		Hz	50
3	Rated current		A	630
4	Rated insulation level	1min power frequency withstand voltage	kV	Arc-quenching chamber fracture 30
		Effective value		Earth ,phase 42, insulating fracture 48
		Lightning impulse withstand voltage (peak)		Earth ,phase 75, insulating fracture 85
5	Rated dynamic current (peak)		kA	50
6	4S thermal current		kA	20
7	Rated power load breaking current		A	630
8	Rated closed-loop breaking current		A	630
9	Rated cable charge breaking current		A	10
10	Rated breaking no-load transformer capacity		kV	1250
11	Rated transfer current		A	2000
12	Fuse model			XRNT-12
13	Striker output energy		J	2~5
14	Rated short-circuit closed current		kA	50	80(predictive value)
15	Earth switch rated dynamic current		kA	50
16	Earth switch 2s thermal current		kA	20
17	Auxiliary circuit rated voltage		V	~220 ~110
18	Mechanical life		times	10000
19	Opening time of fuse trigger		ms	—	30~40
20	Opening time of tripper trigger		ms	40~50