FZN25-12 Series Indoor High Voltage Vacuum Load Break Switch

Short Description:

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.

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

Technical Parameters ♦ 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

1±0.5

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