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12kV High-voltage Dual Power Inter-transfer Device

12kV High-voltage Dual Power Inter-transfer Device

Mostly purpose ZW□-12GG/630-20type high-voltage dual power inter-transfer decive(hereinafter called device)is composed of one set of high-voltage vacuum vircult breaker and intelligent controller.applied in ac50hz dual power supply system with tated voltage of 12kv ,rated current to 630a,when......

Mostly purpose
ZW□-12GG/630-20type high-voltage dual power inter-transfer decive(hereinafter called device)is composed of one set of high-voltage vacuum vircult breaker and intelligent controller.applied in ac50hz dual power supply system with tated voltage of 12kv ,rated current to 630a,when one way of power supply is cutting off or under voltage,it can automatically transfer into the other normal power supply to ensure the continuity of power supply.meanwhile it owns protection of interlock function for short-circult and over current,which effciently avoid unnecessary power supply impact once more in load fault,for electricity cutting off of common used power supply the device can do auto transfer of standby power supply to ensure safety and reliability,and it also do selective transfer between the two ways according to load requl rement.it is especially applicable as key electric control device of continuous power supply for key localtion where doesnot allow electric cutting off.it is a auto self-transfer product with new design,perfect performance,reliable safety,high automatization and wide use,it ensure the total disconnecting of the tow ways product is applicable for users who require high reliability and safety dual power supply as control and protection for power system.

Technic parameter

item

unit

parameter

rated voltage

kv

12

maximum working voltage

kv

12

rated current

a

630

 

ka

20

rated short current switching current (peak value)

ka

50

rated peak value withstand current

ka

50

1minrated short time withstand current

ka

20

rated insulation level

power frequency withstand coltage

kv

42

lightning impulse withstand voltage(peak value)

75

rated operating sequence

 

o-0.3s-co-180s-co

mechanism life

times

10000

breaking current frequency under rated shout circlt

times

30

operating mechanism rated switch-on voltage

v

220

operating mechanism rated switch-off voltage

v

220

contact opening

mm

9±1

overtravel

mm

3

three-phase switching on or off non-synchroneity

ms

≤2

contact closing bounce time

ms

≤2

average switch of speed

s

1.2±0.2

switch-off time

under maximum operation voltage

s

0.025-0.05

under minimum operation voltage

0.03-0.06

switch-on time

s

0.025-0.05

loop resistance

μΩ

≤180

each phase loop dc resistance

mm

3



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