FN5-12 Series Indoor High Voltage Air Load Break Switch

Support customized mass production FN5-12 series indoor high voltage air load break switch (Hereinafter referred to as load break switch) applies to AC 50Hz 12kV network, for breaking load current and closing short circuit current. Load break switch with fuse can cut off short circuit current for switch protection. The load break switch can be used with CS6-1 type manual operating mechanism, and this product special uses CS manual operating mechanism.

Send Inquiry

Product Description

Application

FN5-12 series indoor high voltage air load break switch (Hereinafter referred to as load break switch) applies to AC 50Hz 12kV network, for breaking load current and closing short circuit current. Load break switch with fuse can cut off short circuit current for switch protection.

The load break switch can be used with CS6-1 type manual operating mechanism, and this product special uses CS 口 manual operating mechanism.

Type and Meaning

FN5-12 Series Indoor High Voltage Air Load Break Switch

Use environment

a. Altitude < 1000m;

b. Ambient air teirr mFre: -25~+40°C, (motorized operating mechanism〉-5°C);

c. Relative humidity: daily average <95%, monthly average < 90% (+25 °C);

d. Ambient air without obvious pollution, like corrosive or flammable gas, water vapor, etc.

e. Wihtout requent strong vibration.

Technical data of FN5-12 Series Indoor High Voltage Air Load Break Switch

4.1 Load break switch technical parameters table 1

Name	Unit	Value
Rated voltage	kV	12
Maximum working voltage	kV	12
Rated frequency	Hz	5。
Rated current	A	400 630
Rated short time withstand current (thermal stability current)	kA/S	12.5/4 20/2
Rated peak withstand current (dynamic stability current)	kA	31.5 50
Rated closed loop breaking current	A	400 630
Rated power loading breaking current	A.	400 630
5% rated power loading breaking current	A	20 31.5
Rated cable charging breaking current	A	10
Rated no load transformer breaking current		1250kVA no-load current of transformer
Rated short circuit closing current	kA	31.5 50
Load current breaking times	Load/times	100%/20 30%/75 60%/35 5%/80
1min power frequency w; nstana voltage (RMS), phase-to-phase / isoktmg fracture	kV	42/48
Power frequency v^tnstand voltage between isolating fractures	kV	53
Lightning impulse withstand voltage to ground(peak), phase-to-phase/isolating fracture	kV	75/85
Opening/closing operating torque	Nm(N)	90(80) 100(200)

Note: FN5-12D grounded part of the load switch with short-circuit making current capacity.

4.2 Fuse technical parameter table2

Model	Rated voltage KV	Fuse Rated current A	Rated breaking current KA	Rated current of fuse-element
RN3	12	50	12.5	2, 3, 5, 7.5, 12, 15,20,30, 40, 50
		75		75
		100		100
		200		150 200
SDL*J	12	40	50	6.3, 10, 16, 20, 25,31.5,40
SFL*J	12	100		50, 63, 71, 80, 100
SKL*J	12	126		125

Appearance and Installation Dimensions (mm)

Fig. 1 FN5-12

FN5-12 Series Indoor High Voltage Air Load Break Switch

1. Framework	2. Post insulator	3. Bearing wiring board	4. Blade
5. Arc extinguisher	6. Torsional spring and its pin bearing	7. Guide bar	8. Wiring board
9. Lever	10. Load switch moving bearing	11. Spring charging mechanism	12. Operating mechanism

Fig. 2 FN5-12D

FN5-12 Series Indoor High Voltage Air Load Break Switch

1. Framework	2. Earth blad	3. 7 ,rth switch moving bearing	4. Post insulator
5. Earth moving bearing	6. Beaming wiring board	7. Blade	8. Arc extinguisher
9. Draw spring and + spring’s pin bearing	10. Guide bar	11. Wiring board	12. Lever
13.Load switch bearing	14. Load switch spring charging mechanism	15. Earth swl、h ^ring charging mechanism	16. Load switch operating mechanism
17. Er rth vi ch operating mechanism	18. Interlock mechanism

Fig. 3 FN5-12R(S)

FN5-12 Series Indoor High Voltage Air Load Break Switch

1. FN5-12R load sv

2. Bering fuse wiring board

3. Fuse link

4. Fuse wiring board

5. Fuse base

Fig. 4 FN5-12DR

FN5-12 Series Indoor High Voltage Air Load Break Switch

1. FN5-12D load s'icn

2. Bering fuse wiring board

3. Fuse

4. Fuse wiring board

5. Fuse base

Mechanism modelCS6-1 csn	L Fuse model		H	h
	SDLJ、SFLJ、SKL*J		935	530
	735 RN3-10	<75	990	585
	735 RN3-10	5=75	1040	635

Fig. 5 FN5-12R(S)a

FN5-12 Series Indoor High Voltage Air Load Break Switch

1. FN5-12 load swi、c：i

2. Bering, se wiring board

3. Fuse

4. Fuse wiring board

5. Fuse base

Fig. 6 FN5-12DR(S)

FN5-12 Series Indoor High Voltage Air Load Break Switch

1. FN5-12D switch	2. Bering fuse wiring board	3. Fuse
4. Fuse wiring board	5. Fus	6. Interlock mechanism

Fig. 7 FN5-12R(D)L

FN5-12 Series Indoor High Voltage Air Load Break Switch

1. Under frame	2. Insulator	3. Fuse	4. Tripper device
5. Moving contact	6. Arc extinguisher	7. Guide bar	8. Static contact
9. Opening/closing mechanism	10. Interlock device	11. Load switch operating mechanism	12. Earth switch