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FZ(R)N21A-12 vacuum LBS
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FZ(R)N21A-12 vacuum LBS
Detail

++++General:

   FZN21A-12 and this type of indoor AC high voltage load switch- fuse combination units appliances for three-phase AC 10kV, 50Hz power system, or with the complete power distribution equipment and loop-network switch cabinet , combined substation and other ancillary uses, is widely used in urban network construction and transformation engineering, industrial and mining enterprises, high-rise buildings and public facilities ,can be used as ring power supply unit or terminal equipment, play power distribution, control and protection.

  Technical performance of the products meet the IEC publication 60265-1/FDIS  <igh voltage switches, Part 1: Rated voltages below 1kV over 52kV high voltage load switch> IEC60420<igh Voltage AC load switch – fuse combination units> and CB16926<C High-voltage load switch - fuse combination units> GB3804<-63kV AC high voltage switches>equirement.    

  This product has a breaking capacity, safety and reliability, long life, can operate frequent, compact structure, small size, light weight, the basic no need to maintain. Breaking with rated current, overload current (FZRN21A-12 can short-circuit breaking current) and to prevent equipment missing running ability to switch a visible fracture of isolation, with combined installed capacity of the ground with the relevant switches and electrical spring agencies, to remote  control.

++++Main Technical Paramete:

Load switch main technical parameter

ltem

Unit

Data

Rated voltage

kV

12

Rated frequency

Hz

50

Rated current

A

630

Rated active load breaking curren

A

630

Rated closed loop breaking current

A

630

5% rated active load breaking current

kA

31.5

Rated cable charge breaking current

A

10

Rated iding transformer capacity

kVA

1250

1min power frequency withstand voltage:(Vacuum fracture,phase direction,phase to earth/lsolation fracture)

kV

42/48

Lightning surge withstand voltage:(vacuum fracture,phase to phase,phase to earth/lso lation fracture)

kV

75/85

Rated short-time withstand current(themal stable)

kV/S

20/4

Rated peak value withstand current(peak withstand stably)

kA

5

Rated short-circuit making current

kA

50

Rated current breaking times

Time

10000

Mechanical life

Time

10000

Vacuum explosion chamber contact permission attrition thickness

mm

2

Manual operation moment

Nm

≤200


Comebination electric appliance engineering parameter:


ltem

Unit

Data

Rated voltage

kV

12

Rated frequency

Hz

50

Fuse max rated current

A

125

Rated breaking ac current

A

3150

Fusetrigger switch on/off time

ms

40±5

Rated short-circuit breaking current (effective value)

kA

31.5

Rated short-circuit making current(peak value)

kV

50

1min power frequency withstand voltage:(Vacuum

Fracture,phase to phase,phase to earth/lsolation fracture)

kV

42/48

Lightning surge withstand voltage:(vacuum

Fracture,phase to phase,phase to earth/lsolation fracture)

kV

75/85

Fuse ram output energy

J

2-5


Mechanical characteristic technical parameter:


Ltem

Unit

Data

Distance of moving contact and fixed contact

mm

10±1

Overtravel

mm

4±0.5

Average closing speed

m/s

0.6±0.2

Breaking opening speed(before distance of moving and fixed contact 6mm)

m/s

1.1±0.2

Three-phase contact closing/opening asynchrunous

ms

≤2

Contact closing bounces time

ms

≤2

Air distance between charged bkdy and to earth

mm

≤125

Between upper and lower support main loop resistance

µΩ

≤70