HD series and HS series knife switches (hereinaf ter referred to as switches) are suitable for complete sets of power distribution equipment with frequency of AC 50Hz, rated operating voltage up to 380V and rated operating current up to 3000A. They are used as infrequent manual connection and disconnection circuits or as disconnectors. In which:

1.1 The central handle type knife switch is mainly used for power stations and does not cut off circuits with current, serving as an disconnector.

1.2 Th e side front lever operating mechanism switch is mainly used in front operation and front maintenance switchgear, and the operating mechanism can be installed on both sides of the cabinet.

1.3 The central front lever operating mechanism switch is mainly used in front operation and rear maintenance switchgear, with the operating mechanism installed in the front.

1.4 Side operated handle type switch is mainly used in the power box.

1.5 Switches equipped with arc extinguishing chambers can cut off appropriate current loads, while other series of knife switches are only used as disconnectors. The product complies with the GB/T 14048.3 standard.