Product application: AIS MV switchgear suitable for motor starting and distribution systems of industrial and commercial buildings, heavy industries, mines, railway and other fields.

Special model KYH12S-1250K has same technical data with KYH12-1250, the width of enclosure is 550mm.

Rated operating voltage (Ue): 12kV

Rated current (In): 1250/3150/4000A

Rated frequency: 50Hz

Rated short-duration power frequency withstand voltage: 42kV in compliance with IEC 62271-200

Rated lightning impulse withstand voltage: 75kV

Rated short-time withstand current: 31.5/40/40kA 4s

Rated peak withstand current: 80kA 

Rated short-circuit breaking current: 31.5/40/40kA

Rated short-circuit making current: 80kA

Internal arcing classification:

Accesibility (Front, Rear, Lateral): Type A

Test current: 31.5/40/40kA

Arc duration: 1/0.5/0.5 second

Partition Class: PM (metallic partition)

Loss of service continuity category: LSC2B (metal-clad)

Design specification: Designed and tested in compliance with IEC 62271-200 and GB 3906