FN12-12 Series Indoor High Voltage Air Load Break Switch

Short Description:

FN12-12 indoor HV air load break switch is a 3-phase AC 50Hz 12kV indoor switch equipment.
♦ Installation way: front-mounted, side mounted, flip mounted;
♦ Operating mechanism: spring operating mechanism, manual type and electrical type available;
♦ Operation type: right operation and left operation;
♦ Application: indoor 12kv switchgear.

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Environmental Conditions

♦ Ambient temperature: -25°C 〜+40°C;
♦ Altitude: <1000m (above sea level);
♦ Relative humidity: daily average <95%, monthly average <90%;
♦ Earthquake intensity: <8 level;
♦ Pollution grade: II;
♦ Places without fire, explosion, chemical corrosion and serious vibration.

Main Technical Parameters

NO	Item			Unit	FN12-12D/6 30-20	FN12-12RD/1 25-31.5
1	Rated voltage			kV	12	12
2	Rated frequency			Hz	50	50
3	Rated current			A	630	125
4	1min power frequency withstand voltage (Phase to earth, between poles, open contacts)		Phase-to-earth, phase-to-phase	kV	42	42
4			Isolating fracture	kV	48	48
5	Rated lightning impulse withstand voltage (Phase to earth, between poles, open contacts)		Phase-to-earth, phase-to-phase	kV	75	75
5			Isolating fracture	kV	85	85
6	Rated short time withstand current (thermal stability current)		Load break switch	kA	20
6			Earth switch	kA	20
7	Rated short circuit duration ( thermal stability time)		Load break switch	s	4
7	Rated short circuit duration ( thermal stability time)		Earth switch	s	2
8	Rated short circuit making current (peak)			kA	50
9	Rated breaking current	Active load breaking current		A	630
		Loop breaking current			630
		5% active load breaking current			31.5
		Cable charging current			10
		No-load transformer capacity		kVA	1250
10	Rated short circuit breaking current (limit current fuse)			kA		31.5
11	Rated transfer current			A		1200
12	Mechanical life			times	2000	2000
13	Striker output energy			J		1±0.5