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BackHome > Products > High voltage switchgear
High voltage switchgearKYN44-12 indoor type alternating-current metal-clad mid-set withdrawable switchgear
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KYN44-12 indoor type alternating-current metal-clad mid-set withdrawable switchgear is applicable for three-phase power systems of AC50Hz and 3.6~12kV, used for electric energy receiving and distribution, is a PTD control device for single-bus segment systems. It is mainly used in power plants and substations for power transmission, and industrial and mining enterprises for power distribution, as well as secondary substations for power receiving and transmission and starting of large high-voltage motors, etc, realizes control, protection and monitoring.
● Fully compatible with technical performances and schemes of KYN28A-12, GZS and other switchgears. 
● More mechanical interlocking protection and operation characteristics. 
● Complete mechanical interlocking protection and operation characteristics.
● A variety of configurations of vacuum circuit breakers.  
● w-vac vacuum circuit breaker from Westing House Corporation. 
● VD4 vacuum circuit breaker from ABB Corporation. 
● 3AH5 vacuum circuit breaker from SIEMENS.
● 10-VPR vacuum circuit breaker from MITSUBISHI.
● ZN28GE and VB2 vacuum circuit breakers from GE. 
● EV12 vacuum circuit breaker from Merlin Gerin. 
● VS1 vacuum circuit breaker from Senyuan Corporation. 
● All kinds of homemade vacuum circuit breakers such as VS1, ZN28, ZN63, ZN, etc. 
● Adoption of imported and homemade microcomputer-based monitor and remote controller, or electromechanical relay protection and meter monitoring. 
● Luxurious imported type, universal type and economical type for option. 

Outline dimension of switchgear (mm)

 Breaker model  W-VAC   VPR  3AH5  VD4、VS1、ZN28、ZN63
Height (H)  2300  2300  2300  2300
Width (W)  ≤1250A＞1600-3150A  700
  800 		 800
  1000 		 800
  1000 		 800
  1000
Depth (D)  1660   1660  1600 1500 (Note 2)

Note: 1. Cabinet width is 800 except the breaker cabinet whose width varies.
         2. Depth of incoming/outgoing cables is 1660.

Main technical parameters of switchgear 
Item  Unit Data
 Rated voltage  KV  3.6，7.2，12
 Rated insulation level  1min power frequency withstand voltage
  Lightning impulse voltage (full wave) 		 KV
  KV 		 24，32，42
  40，60，75
 Rated frequency
 Rated current 
 Rated current of main bus
 Rated current of branch bus
 4s short-time withstand current (effective value)
 Rated peak withstand current (peak)
  Hz
  A
  A
  A
  KA
  KA 		   50
  5-3150
  1600，2000，2500，3150
  630，1250，1600，2000，2500，3150
  16，20，25，31.5，40，50
  40，50，63，80，100，125
 Protection class  The shell is IP4X, and it is IP2X when the circuit breaker chamber door is opened

Note: please take the breaker model into consideration especially for short-circuit capacity of current transformer. 

 Corporation  C-H  ABB  SIEMENS GE Mitsubishi Homemade
 Model   W-VAC  Vd4  3AH5  ZN28GE、VB2  VPR  VS1、ZN28、ZN63…
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