HD (HS) Open Knife Switch Series

Scope of application
The HD series single throw knife switch and HS series double throw knife switch are suitable for use in complete power distribution equipment with AC 50Hz, rated voltage 400V, DC 220V, and rated current up to 1500A. They are used for manual infrequent connection and disconnection of AC/DC circuits or for electrical isolation
The HD (S) 11 series central handle knife switch is mainly used in power stations, which does not cut off circuits with current and is used for electrical isolation
The HD (S) 12 series side front lever operated knife switch is mainly used in switch cabinets for front operation and maintenance. The operating mechanism can be installed on both sides of the cabinet
The HD (S) 13 series central front lever operated knife switch is mainly used in switchgear for front operation and rear maintenance, with the operating mechanism installed in the front
The HD (S) 14 series side operated handle type knife switch is mainly used in power boxes. Knife switches equipped with arc extinguishing chambers can cut off current loads, while other series of knife switches are only used for electrical isolation

Normal working conditions and installation conditions
The ambient air temperature should not exceed+70C, not be lower than -25C, and the average temperature value within 24 hours should not exceed+35 ° C
The altitude of the installation location shall not exceed 2000m. Humidity: When the maximum temperature is+60 ℃, the relative humidity of the air should not exceed 95%. Special measures should be taken for occasional condensation caused by temperature changes
The pollution level of the surrounding environment is level 3
The switch should be installed in a place without significant shaking, impact vibration, and no rain or snow invasion. At the same time, the installation location should be free of explosive hazardous media, and there should be no gas or dust in the media that can corrode metals and damage insulation