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FZN 21-12D/T630-20 Indoor high voltage vacuum load switch
Release time:2015-06-05 20:19 Read:Time

FZN 21-12D/T630-20 Indoor high voltage vacuum load switch

FZN 21-12D/T630-20 Indoor high voltage vacuum load switch and the composite apparatus is applicable to three-phase ac 10 KV power system of 50 HZ, or with complete sets of power distribution equipment and the ring net switch cabinets, combined substation, etc, are widely used in the domain network construction project Industrial and mining enterprises on tall buildings and public facilities, etc., can be used as a ring net power supply or terminal, the distribution of the electric power control and protection role.
Its technical performance in line with the IEC publication 60265-1 / FDIS< High-voltage load switch, the first part: 52 KV rated voltage 1 KV high-voltage switch> IEC60420 < The high voltage ac load switch and fuse combination electric appliance> GB16926 <AC high voltage load switch and fuse combination electric> GB3804 - 63KV <AC high voltage load switch>
This product has great capacity of open circuit Safe and reliable Electricity long life But frequent operation compact structure Advantages of small size light weight basic don't need to repair With open circuit rated current overload current (FZN21-12 Dr/T125-31.5) can prevent the breaking short circuit current and phase operation ability, the switch has the obvious isolation, grounding switch electric spring about the ability of combined with fittings machine structure, can remote control.
◎Use environmental conditions
altitude: ≯200m
Ambient air temperature: -25℃
* Average daily levels of relative air humidity isn’t more than95% , monthly average levels of it isn’t more than90%

* No conductive dust ,No corrosive gas and no water vapor body
* No fire and no explosion
* No recurrent violent vibration
structural features
The combination type load switch and the main disconnecting switch by box (combiner current-limiting fuse on isolating switch) vacuum switch tube grounding switch spring operating mechanism, etc
The product structure is compact Small size long service life Goes off ability Easy operation and maintenance Vacuum switch is equipped with spring operating mechanism, the motor (to match the manual) spring energy storage phase electromagnet switch and manual switching two kinds of isolating switch vacuum switch, grounding switch between interlock each other (machine interlock), in order to prevent wrong operation
◎Main technical parameters
Serial number Project Company Numerical Numerical
FZN21-12D/T630-20 FZN21-12D/T630-20
1 Rated voltage KV 12 12
2 frequency HZ 50 50
3 Rated current A 650 125
4 Rated insulation level power frequency withstand voltage
(1 Min )
KV Vacuum fracture and interphase 42 Isolated fracture 48
lightning impulse withstand voltage KV Vacuum fracture and interphase 75 Isolated fracture 85
5 Rated peak withstand current KA 50 -
6 rated short time current KA 20 -
7 Active load open circuit current rating A 630 -
8 Rated closed loop breaking current A 630 -
9 rated cable-charging breaking current A 10 -
10 Open circuit no-load transformer capacity KVA 1250 1250
11 Rated short circuit breaking current KA - 31.5
12 rated-transfer current of switch A - 3150
13 Fuse type   - SDLAJ-12,SFLAJ-12,SKLAJ-12
14 Impactor energy output J - 3-5
15 Rated peak with stand current KA 50 80(Expected peak)
16 Grounding switch rated withstand current (peak) KA 50 50
17 Grounding switch rated short-time resistance current(4S) KA 20 20
18 The rated voltage of auxiliary loop(DC or AC) V ≌220,≌110 ≌220,≌110
19 mechanical life 10000 10000
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