FN7-12 Series Indoor High Voltage Air Load Break Switch

Short Description:

FN7-12 is a new type of air indoor high-voltage load break switch. It is suitable for AC 50Hz, rated voltage 12kV three-phase AC power system, as the breaking load current and closing short-circuit current.

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Product Detail

Product Tags

Application

Type Description

Working Conditions

● Ambient temperature: -25 °C~ 40°C;
● Altitude: <1000m;
● Relative humidity: daily average <95%; Monthly average <90%;
● There shall be no corrosive, combustion and explosion gas or vapor on the site;
● No frequent violent vibration.

Technical Parameters

Main specifications Note: (-) without (A) with Table 1

Name	Type	Model	DS	DX	L	R	RA	F
			Earth switch at inlet	Earth switch at outlet	Interlock device	Fuse	Striker fuse	Electric opening device
Load break switch	Without tripper	FN7-12	-	-	-	-	-	-
		FN7-12DSL	A	-	A	-	-	-
		FN7-12DXL	-	A	A	-	-	-
		FN7-12R	-	-	-	A	-	-
		FN7-12DSLR	A	-	A	A	-	-
		FN7-12DXLR	-	A	A	A	-	-
	With striking tripper	FN7-12RA	-	-	-	-	A	-
		FN7-12RAF	-	-	-	-	A	A
		FN7-12DXLRA	-	A	A	-	A	-
		FN7-12DXLRAF	-	A	A	-	A	A

Rated parameters Table 2

Rated voltage kV

Max. voltage kV

Rated current

1min power frequency withstand voltage kV

4s thermal stability current(RMS) kA

Dynamic stability current(peak) kA

Short circuit making current kA

Rated breaking current A

Rated transferring current A

400

42/48

12.5

31.5

400

1000

630

42/48

630

1000

Rated parameters of fUse Table 3

Model	Rated voltage kV	Rated current A	Rated current of fuse
SDLA*J	12	40	6,3,10,16,20,25,31.5,40
SFLA*J	12	100	50,63,71,80,100
SKLA*J	12	125	125

A*: with striker.

General Structure Drawing and Installation Size ( unit mm )

1. Arc Extinguishing Knife 2. Arc Contact Part and Arc Extinguishing Chamber 3. Insulator 4. Base
5. Dynamic Contact Knife 6. Static Contact Knife 7. Spring energy storage device (inside the main axis sleeve) 8. Main knife turning arm

Drawing 1 FN7-12 load switch outline and installation size

1.Arc Extinguishing Knife 2.Arc Contact Part and Arc Extinguishing Chamber 3. Insulator 4. Base
5. Dynamic Contact Knife 6. Static Contact Knife 7. Spring energy storage device (inside the main axis sleeve)
8. Earthing Knife 9. Main knife closing turning arm 10. Earthing knife closing turning arm

Drawing 2 FN7-12DXL load switch outline and installation size

1.Arc Extinguishing Knife 2.Arc Contact Part and Arc Extinguishing Chamber 3. Insulator 4. Earthing knife
5. Base 6. Dynamic Contact Knife 7* Static Contact Knife 8. Fuse 9* Spring energy storage device (inside the main axis sleeve)
10. Earthing energy-storage spring 11. Interlock device 12. Main knife closing&opeing turning arm
13. Earthing knife closing&opening turning arm

Drawing 3 FN7-12DXLR separated type load switch outline and installation size

1.Arc Extinguishing Knife 2.Arc Contact Part and Arc Extinguishing Chamber 3. Insulator 4. Base
5. Dynamic Contact Knife 6. Static Contact Knife 7. Spring energy storage device (inside the main axis sleeve)
8. Fuse 9. Main knife closing&opening turning arm

Drawing 4 FN7-12R separated type load switch outline and installation size

1 .Arc Extinguishing Knife 2.Arc Contact Part and Arc Extinguishing Chamber 3. Impact type Fuse 4. Insulator Base 5. Earthing knife
6. Base 7. Dynamic Contact Knife 8. Main knife closing spring 9. Static Contact Knife 10. Earthing energy-storage spring
11. Main knife opening spring 12. Interlock device 13. Main knife closing&opeing turning arm m 14.Earthing knife closing&opening turning arm

Drawing 5 FN7-12DXLRA integrated type load switch outline and installation size

1.Arc Extinguishing Knife 2. Arc Contact Part and Arc Extinguishing Chamber
3. Insulator 4. Base 5. Dynamic Contact Knife 6. Static Contact Knife
7. Spring energy storage device (inside the main axis sleeve) 8. Plate

Drawing 6 FN7-12C load switch outline and installation size

1.Arc Extinguishing Knife 2. Arc Contact Part and Arc Extinguishing Chamber
3. Insulator 4. Base 5. Dynamic Contact Knife 6. Static Contact Knife
7. Spring energy storage device (inside the main axis sleeve) 8. Fuse 9. Plate

Drawing 7 FN7-12CR separated type load switch outline and installation size

1.Arc Extinguishing Knife 2. Arc Contact Part and Arc Extinguishing Chamber 3. Impact type fuse 4. Earthling knife
5. Insulator 6. Base 7. Main knife closing spring 8. Dynamic Contact Knife 9. Static Contact Knife
10.Earthing energy storage spring 11. Main knife opening spring 12.Plate 13. Drawing 11