Outdoor HV isolation knife brake

Outdoor high voltage AC isolation switch (hereinafter referred to as "isolation switch"), suitable for installation on outdoor high voltage distribution equipment lines, for 10 kV lines in the case of voltage and no load, as well as the maintenance of high voltage bus, circuit breakers and other electrical equipment and live high voltage lines for electrical isolation. It can also be used to split small capacitive and inductive currents.

General:

Service Environment

The altitude does not exceed 1000M;
The upper limit of the ambient temperature is 40℃, the lower limit is -25℃;
No conductive or chemically acting gas and steam place;
No fire, explosion danger, seriously polluted places;
Not subject to serious vibration or impact (such as in the pickaxe, dredger) place

Key Feature

The isolation switch consists of three single-pole switches.
Each single-pole isolation switch has the same components, including base, strut and operating insulator, front and rear static contacts, knife and arc Angle
CS operating mechanism is used for those with grounding knife, CS8-5 operating mechanism is used for those without grounding

Technical Data

Name			Unit	Data
Rated voltage			kV	12
Rated frequency			Hz	50
Rated current			A	630		1250（1600）
Rated short-time withstand current and duration	Disconnecting switch		kA/s	20/4	25/4	25/4		31.5/4
	earthing switch			20/2	25/2	25/2		31.5/2
Rated peak withstand current			kA	25	63	63		80
Rated short-time power frequency withstand voltage		Phase to Phase，phase to earth（dry）	kV/min	42/1
		Open contact（dry）		48/1
		Phase to Phase，phase to earth（wet）		42/1
Rated lightning impulse withstand voltage		Phase to Phase，phase to earth	kV	75
		Open contact		85
Loop resistance			μΩ	≤100			≤80
creep age distance			mm	≥372(Class e anti-fouling)
Mechanical life			Times	3000（disconnecting switch/earthing switch）