FZN25-12 Series Indoor High Voltage Vacuum Load Break Switch

Application

FZN25-12 indoor HV vacuum load break switch a 3-phase AC 50Hz 12kV indoor switch equipment.

♦ Operating mechanism: spring operating mechanism, manual type and electrical type available;

♦ Operation type: right operati on an d left operation;

♦ Operation direction: left operation, right operation;

♦ Application: indoor 12kv switchgear.

Specifications

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;

Installation place without fire, explosion, chemical corrosion and serious vibration.

Parameter

Main technical parameters

NO	Item		Unit	FZN25-12LT 630-20	FZRN25-12D/T 200-31.5
1	Rated voltage		kV	12	12
2	Rated frequency		Hz	50	50
3	Rated current		A	630	200
4	1min power frequency withstand voltage (Phase to earth,	Phase-to-earth, phase-to-phase	kV	42	42
	between poles, open contacts)	Isolating fracture		48	48
5	Rated lightning impulse withstand voltage (Phase to	Phase-to-earth, phase-to-phase	kV	75	75
5	earth, between poles, open contacts)	Isolating fracture	kV	85	85
6	Rated short time withstand current (thermal stability current)	Load break switch	kA	20
7	Rated short circuit duration ( thermal stability time)	Load break switch	s	4
8	Rated short circuit making current (peak)		kA	50
9	Rated active load breaking current		A	630
10	Rated loop breaking current		A	630
11	Rated cable charging current			10
12	Rated no-load transformer capacity		kVA	1600	1600
13	Rated short circuit breaking current (limit current fuse)		kA		31.5
14	Rated breaking transfer current		A		2000
15	Fuse model				SDLAJ-12 SFLZJ-12
16	Striker output energy		J		2-5

NO	Item	Unit	FZN25-12D/T 630-20	FZRN25-12D/T 200-31.5
17	Auxiliary circuit rated voltage	V	^110 ^220	^110 ^220
18	Earth switch rated short time withstand current	kA	20	20
19	Earth switch rated peak short circuit duration	S	2	2
20	Earth switch rated peak withstand current	kA	50	50
21	Rated short making current	kA	50	80(prospective peak value)
22	Mechanical life	times	10000	10000

Mechanical property

NO	Item	Unit	Value
NO	Item	Unit	FZN25-12 D/ T630 20	FZRN25-12 D/T200-31.5
1	Air clearance between charged parts and to earth	mm	>125
2	Conducting tube insert into fixed contact holder depth	mm	>18
3	Vacuum interrupter open distance	mm	600+1
4	Vacuum interrupter contact spring compression length	mm	20+1
5	Vacuum interrupter average closing speed	m/s	0.6±0.2
6	Vacuum interrupter average opening speed	m/s	1.0±0.2
7	Closing bouncing time	ms	<2
8	Three phase closing and opening synchronism	ms	<3
9	Main circuit resistance	rQ	<150	<300
10	Manual opera+’on maximum torque	n.m	<160
11	Fuse trigger opening time	ms	–	30-40
12	Release trigger opening time	ms	40-45

Energy storage motor parameters

Model	Rated voltage V	Rated current A	Rated power W	Normal working voltage range
LLZY-CJ01B8	AC/DC220	0.7	70	85%-110% rated
66ZY-CJ028	AC/DC110	1.5	70	voltage

General Structure Drawing and Installation Size (unit: mm)

1. Cabinet bracket 2. Disconnector 3. Fuse 4. Insulated tension pole5. Upper bracket 6. Vacum interrupter 7. Static contact 8. Insulator9. Grounding knife 10. Grounding knife spring 11.Opening spring12. The tripping driving device 13. Insulated tension pole 14. Main axle15.Layshaft 16. Adjusting yoke 17. Spring operating mechanism

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Vacuum Load Break Switch

Single pole vertical installation
Horizontal installation
Pole top installation

Indoor high-voltage SF6 load break switch is widely used in the 11~36kV electric power distribution systems.

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