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  • Name: Middle cabinet KYN28A-12/24
  • Number: Transmission and Distribution 03

Overview
KYN28A-12/24 removable metal-clad enclosed switchgear (hereinafter referred to as the switchgear), produced by Shenzhen Kairuiyue Electric Equipment Co., Ltd., is a complete set of power distribution equipment of 12kV or 24kV three-phase AC 50Hz single-busbar segmented system. It’s mainly used in power transmission of power plants and small and medium generators, power distribution for industrial and mining enterprises, and power receiving and power transmission of tertiary substations in electrical systems, as well as starting of large high-voltage motors for the use of control, protection, and monitoring. In line with IEC289, BG3906, and other standards, the switchgear has the interlocking functions to prevent from on-load push-pull of circuit breaker handcart, misuse of breakers, breaker on-off on position by the grounding switch, false access to charged compartment, charged on-off of the grounding switch, etc. It can be equipped with not only domestic VS1 central-positioned vacuum circuit breaker, but also ABB VD4 vacuum circuit breaker. It’s indeed a kind of electrical distribution equipment with superior performance.

Normal Service Conditions

  • Ambient air temperature: -10℃ ~ +40℃
  • Altitude: 1000m at most
  • Environment humidity: Daily average relative humidity: ≦95%, monthly average relative humidity: ≦90%
  • Earthquake intensity: Less than 8 on the Richter scale
  • Ambient air should be free from obvious contamination such as corrosive or flammable gases, water vapor, etc.
  • No serious pollutions or recurrent severe vibrations

Special Working Conditions
When the switchgear is running at high temperature and (or) greatly changed temperature, there may be danger of leakage. The heating plate in cabinet must be put to prevent insulation failures and metal corrosion.

Technical Parameters (I)

Item

Unit

Data

Rated voltage

kV

10/20

Maximum work voltage

kV

12/24

Power frequency withstand voltage

Interphase, phase-ground

kV

42/65

Fracture

kV

48/79

Lightning impulse withstand voltage

Interphase ,phase-ground

kV

75/125

Fracture

kV

95/145

Rated frequency

Hz

50

Main bus rated current

A

630,1250,1600,2000,2500,3150

Branch main bus rated current

A

630,1250,1600,2000,2500,3150

Rated short time withstand current

kA

20,25,31,5,40

Rated peak withstand current

kA

50,63,80100

IP code  

Enclosure: IP4X; isolation room and circuit breaker room: IP2X when door is open.

 Technical Parameters(II)

Rated voltage

Energy-stored motor power VA/W

Energy-storing time(maximum)s

Vs1

VD4

Vs1

VD4

AC

110

220

70

70

150

150

10

10

15

15

DC

110

220

70

70

140

140

10

10

15

15

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