Off circuit disc type tap changer

WSP（WDP）off circuit disc type tap changer

This tap changer is a product jointly designed by relevant manufacturers organized by Shenyang Transformer Research Institute. It adopts new structure, new materials, and new technology. It has the advantages of reasonable structure, good hand feel, flexible gear adjustment, and accurate positioning. It is the current updated product of my country's non-excitation tap changer. It is suitable for single-phase and three-phase oil-immersed power transformers with frequencies of 50HZ and 60HZ, rated voltages from 10kV to 35kV, and rated currents from 63A to 250A. It can be directly fixed on the transformer box cover.

Technical Parameters

Specificatons		WSP 63	WSP 125	WSP 250
Phase number		three-phases
connection mode		Central point(Ⅱ)Neutral Point(Ⅲ)
Rated through current(A)		63	125	250
Short-circuit capacity	（kA／2s）Heat stableness current(kA/2s)	1.6	2.5	3.75
	(kA) Dynamic stableness current(kA)	4	6.25	9.375
Rated frequency（Hz）		50～60
Insulation level(kV)	Rated Voltage（kV）	10kV	20kV	35kV
	Power-frequency withstand Voltage（50Hz／1min)	42kV	55kV	95kV
	Impulse（1.2／50μs)	75kV	125kV	250kV
Sealing Performance（kPa/24h）		60
Machine life(Thousands of times)		2
Tank hole thickness：(1)63/10～20 tap changer suitable for 5～8mmtransformer tank hole (2)125/10～20 tap changer suitable for 6～10mmtransformer tank hole (3)250/10～20 tap changer suitable 8～12mm transformer tank hole (4)35kV tap changer suitable for 8～12mm transformer tank hole

Transformer Positioning Welding Assembly Drawing