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FZ(R)N25-12 load break switch
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FZ(R)N25-12 load break switch
Detail

++++General:

   FZN25-12 Indoor AC HV vacuum Load break switch and FZRN25-12D Indoor AC HV vacuum load break switch with assembly fuse is the controlling and protecting equipment of three-phase 50Hz, 12kv distribution system, which is widely used in the situations of industrial and mining establishiments and power distribution station of urban buildings. Combined electrical apparatus can protec transformer and other electric equipments. it is used more reliable than circuit breaker. esbecially, it can be perfectly used in terminal substation and box-type substation of urban net and rural net in order to control and protect ring net birabdial electric unit.

++++Standard:
   a. GB38041.1-90 <<3-63KV AC H.V load switch>>.
   b. GB16926-97 <<AC H.V load switch with fuse box>>                                      

 C. IEC265-1 HV Load Switch No.1 : Rated voltage between 1kv and 52kv high voltage load switch
   d. IEC420(1990). <<AC H.V load switch with fuse box>>  

++++Technical Parameters:

No.

Name

Unit

FZN25-12/630-20

FZN25-12/(R)D125-31.5


1

Rated voltage

kV

12


2

Rated frequency

Hz

50


3

Reated current

A

630

less than 200


4

Rated insulating level


1min power frequency withstand voltage

kV

30


42/48


Lightning impulse resisting voltage


kV

75/85


5

Rated 4S heat - stability current

kA

20


6

Rated duration of short circuit

S

4


7

Rated dynamic current

kA

50



8

Rated active load breaking current

A

630



9

Rated closed loop breaking current

A

630



10

Rated cable charging current

A

10



11

Breaking no-load transformer capacity Max. breaking current

kvA

1600


12

 Rated short circuit breaking current

KA


31.5


13

Rated transfer current

A


2000


14

Fuse model



SDLAJ-12,SFLAJ-12


15

Impactor output energy

J


2-5


16

Rated short circuit closing current

kA

50

80(expected peak)


17

Earth switch heat-stability current

KA

20


18

Earth switch rated duration of short circuit

S

2


19

Auxiliary loop rated pressure

V

220,110


20

Mechanical endurance

operations

10000