WSL, WDL -

WSL, WDL

Type WSL De-Energized Tap Changer (herein referred as tap changer) is of in-tank structure and without separate oil compartment. It is mounted to transformer tank by a tap changer head ange.

By the operation method, tap changer can be divided into motor driving at man position, and manual drive mechanism operating at man position as well as hand wheel manual operation on the top.

Item	Specification			WSL, WDL
1	Max. rated through-current (A)			600		800		1000				1200		1600		2000		2400			3000
	Short-circuit current test (kA)	Thermal (3s)		9	12			15			15			20	24			26			30
		Dynamic (Peak)		22.5	30			37.5			37.5			50	60			65			75
2	Rated frequency (Hz)			50 or 60
3	Connection			3 phases (WSL), single phase (WDL)
7	Max. Operating Positions			Max. 5 for types A and B, max. 11 for type D and max. 17 for type E
8	Insulation to ground (kV)		Highest voltage for equipment Um	12			72.5		126				145				170			252
			Rated separate source AC withstand voltage (kV/50Hz,1min)	35			140			230			275				325		460
			Rated lightning impulse withstand voltage (kV,1.2/50μs)	75			325			550			650				750		1050
9	Contact circle diameter			Type A: ⌀350; type B: ⌀500; type D: ⌀600; type E: ⌀750
10	Mechanical life			Not less than 20,000 operations for manual driving Not less than 100,000 operations for motor driving
13	Motor drive unit			SHM-D or CMA7