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load switches 12kv 24kv 36kv FZN21-12(R)-31.5 indoor load switches

FZN21-12(R)D/T125-31.5 indoor AC high voltage load switches
FZN21-12(R)D/T125-31.5 indoor AC high voltage load switches-Fuse combination units FZN21-12/T630-20 and FZN21-12(R)D/T125-31.5 type Indoor AC high voltage load switch- fuse combination units appliances for three-phase AC 10kV, 50Hz power system.
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Product Description

 

FZN21-12(R)-31.5 indoor load switchesProduct Description

   FZN21-12(R)D/T125-31.5 indoor AC high voltage load switches-Fuse combination units   FZN21-12/T630-20 and FZN21-12(R)D/T125-31.5 type 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  < voltage switches, Part 1: Rated voltages below 1kV over 52kV high voltage load switch> IEC60420< Voltage AC load switch – fuse combination units> and CB16926 GB3804<-63kV AC high voltage switches>requirement.    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 (FZRN21-12D/T125-31.5 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. 

Environment condition

1. The altitude: under 1000M.

2. The ambient temperature: -25-+40.

3. The relative humidity of air: monthly≤90%, daily≤95%.

4. Amplitude: Earthquake degree 8.

5. Application occasions should free from fire, inflammables, explosives, corrosives and severe vibration.

Structural features

1. load switch, grounding switch, fuse and instructions in a framework that can be flexibly combined, compact, convenient and easy to install a small volume.

2. the fracture is direct acting arrangement. dynamic and thermal stability current parameters is high, time to complete the operation. 

3. with static contact insulation cover, so RMU in the structure to achieve the isolation, eliminating the phase insulating spacer, fracture insulation boards that can prevent internal arc short circuit accident.

4. has a unique valve structure, load switch after opening the shutter automatically fracture isolation, good protective properties. 

5. load switch and grounding switch, a reliable mechanical locking device between the fuse. to meet the "Five Anti requirements.

Two forms of electric operations 6, with manual operation and AC and DC operating power supply, easy to implement power system, "three remote' requirements.

Technical parameter

No

Item

Unit

Value

1

Rated voltage

kV

12

2

Rated frequency

Hz

50

3

Rated current

A

630

125

4

Rated insulation level

1min power frequency   withstand voltage

kV

Arc-quenching chamber

fracture 30

Effective value

Earth , phase 42,

insulating fracture 48

Lightning impulse   withstand voltage (peak)

Earth , phase 75,

insulating fracture 85

5

Rated dynamic current   (peak)

kA

50

6

4S thermal current

kA

20

7

Rated power load   breaking current

A

630

8

Rated closed-loop   breaking current

A

630

9

Rated cable charge   breaking current

A

10

10

Rated breaking no-load   transformer capacity

kV

1250

11

Rated breaking AC   current

A

3150

12

Rated short-circuit   closed current

kA

50

13

Rated current breaking   times

times

2000

14

Mechanical life

times

10000

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