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