General

The KYN28A-12 model(GZSI)indoor metal armoring center-fixed removal type switch equipment(named as switch cabinet for short )belongs to there-phase AC 50Hz indoor complete set distribution appliance, it is mainly used to distrybuter3-12kv network power and control, protect circuit. The kinds of microcomputer type integrated protective relay device can be installed on relay small-cabinet panel of this product, additionally, it can realize intelligentized control of system and owns many functions as remote-control, telemeter, remote signaling, remote regulating etc, the on-site network could be controlled by the CAN bus with communications interface. This prevention ales possesses "five-prevention" function such as prevention of error run circuit breaker, prevention of moving handcart with election of error run circuit breaker, prevention of moving handcart whit electric charge, prevention of error run circuit breaker, prevention of moving handcart whit electric charge, prevention of switching on ground switch with electric charge, prevention of error-entering into electric gap, prevention of ground switch 'power supply at earthling position. This cabinet could be suited with both VSI(ZN63), ZN12V vacuum circuit breaker and imported VD4 vacuum breaker, VC series vacuum contactor.

Technical parameter
Name
Unit
Date

Rated insulation

Level
Rated voltage
KV
3.6
7.2
1.2

1 min
KV
24
32
42

Thunder impulse withstand voltage
KV
40
60
75

Rated frequency
Hz
50

Rated current
A
630, 1250, 1600, 2000, 2500, 3150

4s little withstand current
KA
20, 25, 31.5, 40, 50

Rated peak value withstand Current
KV
50, 63, 80, 100, 125

Class of protection

Outer-casing IP4X, isolation plate between separated-chests is IP2X