FKN12-12 series indoor high-voltage load switchDetailed product description：

Overview

FN12-12D/630-20 indoor AC high voltage load switch (hereinafter referred to as FN12-12D load switch) is a three-phase high voltage switchgear with a rated voltage of 12KV and a rated frequency of 50Hz. It is used for switching load current, closed-loop current, no-load transformer and cable charging current, and short-circuit current. Load switches equipped with grounding switches can withstand short-circuit currents.

The FN12-12D. R/100-31.5 indoor AC high voltage load switch fuse combination (hereinafter referred to as FN12-12D. R combination) is an indoor high voltage switchgear that combines the FN12-12D load switch with the S □ LAJ-12 (XRNT □ -12) high voltage current limiting fuse. It can reliably disconnect any current up to the short-circuit current: load switch disconnects the working current, fuse disconnects the short-circuit current, and jointly disconnects any overcurrent between the working current and the full short-circuit current, while the fuse opens the load switch through its impactor.

Normal working environment
1. Surrounding air temperature: upper limit+40 ℃, lower limit -25 ℃.
2. The altitude is 1000m and below.
3. Relative humidity: Monthly average not exceeding 90%, daily average not exceeding 95%.
4. The surrounding air should not be significantly polluted by corrosive or flammable gases, as well as steam gases.
5. No frequent vigorous exercise.
6. Pollution resistance level: Level II.
If the usage conditions exceed the above regulations, they shall be determined through consultation between the user and the manufacturer.

Technical parameters and performance of FKN12-12 series indoor high-voltage load switch

serial number	project	unit	FN12-12D/630-20	FN12-12D.R/100-31.5
one	rated voltage	kV	twelve
two	rated frequency	Hz	fifty
three	rated current	A	six hundred and thirty	one hundred
four	Lightning impulse withstand voltage	kV	Ground and phase to phase 75, isolated and disconnected 85
five	1-minute power frequency withstand voltage	kV	To ground and phase 42, isolate and disconnect 48
six	Rated thermal stability current	kA	20（4S）
seven	Rated dynamic stable current	kA	fifty
eight	Rated closing current (peak value)	kA	fifty
nine	Rated short-circuit breaking current	kA		thirty-one point five
ten	Rated transfer current	kA		one point five
eleven	Maximum breaking current (reference value)	kA	one point eight
twelve	Disconnect the capacity of the no-load transformer	Kva	one thousand two hundred and fifty
thirteen	Rated cable charging current	A	ten
fourteen	Rated active load current breaking times	time	>100
fifteen	The time when the impactor triggers the load switch to open	S		>0.06
sixteen	Grounding switch thermal stability current	kA	20（2S）	20（2S）
seventeen	Grounding switch thermal stability current (peak)	kA	fifty	fifty
eighteen	Electric motor operating power supply voltage	V	AC220、DC48

·Mechanical characteristic parameters

serial number	project	unit	FN12-12D/630-20	FN12-12D.R/100-31.5
one	Auxiliary contact opening distance	mm	>155
two	Synchronization of three-phase opening and closing	ms	<3
three	Just divided speed	m/s	>2.8	2.80+0.4
four	Just closed speed	m/s	>3.8
five	Grounding switch fracture distance	mm	145 ± 5
six	main circuit resistance	μΩ	<120	<300
seven	Maximum operating force distance	N.m	<160	<180

·Main technical parameters of FKN12-12 series indoor high-voltage load switch

serial number	Model number		Rated current for melting (A)	Capacity of transformer (kVA)
	UK model	National standard model
one	SDLAJ-12	XPNT□-12	sixteen	100，125，160
two			twenty	two hundred
three			twenty-five	two hundred and fifty
four			thirty-one point five	three hundred and fifteen
five			forty	four hundred
six	SFLAJ-12		fifty	five hundred
seven			sixty-three	630，800
eight			eighty	one thousand
nine	SSLAJ-12		one hundred	one thousand two hundred and fifty
ten	SKLAJ-12		one hundred and twenty-five	one thousand and six hundred

·FKN12-12 series indoor high-voltage load switch appearance and installation dimension diagram