FN7-12 Indoor load break switch (LBS) 12KV

FN7- 12R(L) model indoor AC HV load break switch-fuse combination apparatus is developed and designed based on international technology and national power supply requirement, it passed all type tests and trial-operation inspections. The apparatus conforms to IEC420: AC LOAD BREAK SWITCH AND FUSE COMBINATION APPARATUS(1990 EDITION) Compared to international product it keeps up with technical level with small volume and light weight. It is applicable in ring main unit and prefabricated substations as well as 12kv line and power distribution system. The product realizes three working positions: power making. power breaking and earth. It applies to power system of rated voltage 6- 12kv, 50/60HZ breaking load current over load current and short-circuit current.

Product Detail

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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	Units	Technical parameters
1	Rated voltage	kV	10
2	Maximum working voltage	kV	12
3	Rated current	A	200	400		630
4	Rated short-time withstand current(4s)	kA	6	12.5		20
5	Rated peak withstand current	kA	15	31.5		50
6	Rated closed loop breaking current	A	200	400		630
7	Rated loading breaking current	A	200	400		630
8	Rated loading breaking current (5%)	A	10	20		31.5
9	Rated short circuit closing current	kA	15	31.5		50
10	Power frequency withstand voltage	kV	42(Fracture:48)
10	Lightning impulse withstand voltage	kV	75(Fracture:84)
11	Open/close operating torque	N.m(N)	90(180)		100(200)