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Type WST4 Three Phase Off Load Tap Changer (star connection) 1

Type WST4 Three Phase Off Load Tap Changer (star connection) 2

Type WST4 Three Phase Off Load Tap Changer (star connection)

This kind of switch applies to the three-phase combination oil-immersed transformer electrical power with rated voltage of 10KV-36KV, rated current of 63A-250A; the voltage-regulating mode are: central part, terminal point ncutral point, which can be dircctly fixed on the tank cover of the transformer, exchange under the off-circuit condition.

Type WST4 three phase-tap changer (star connection)

- Used in mineral oil or silicon oil

- Rated Voltage 10KV-36KV

- Rated current from 63A-250A

- Tapping position: 3-7

- Regulation 2.5% per position

Model Explanation
WST □ - □/□-□╳□
W: off-circuit
S : three-phase or D for single phase
T : linear type tap changer
□: voltage regulation model
□: rated current
□: rated voltage
□: number of tapping heads
□: number of tapping position

Voltage Regulation Model
I : terminal point
II : central point
III : neutral point
IV : Y-△ conversion
V : series-parallel connection

Our Advantage

* High pressure capability
* Strong anti-aging ability
* Strong anti-lightning impact
* Strong protection
* Use smoothly
* Stable use

Number of positions	Rated voltage	Rated current	L	L1	L2	L3	L4	L5	H	H1	Regulating position
3	10 kV	63A	617	232	199	59	99	24	100	78	Terminal point
		125A	665	248	215	59	107	29	100	78
		250A	665	248	215	59	112	29	100	78
	36 kV	63A	686	266	211	59	103	24	120	98
		125A	735	284	228	59	107	34	120	98
		250A	735	284	228	59	112	34	120	98
5	10 kV	63A	760	280	247	59	99	24	100	78
		125A	839	306	273	59	107	29	100	78
		250A	839	306	273	59	112	29	100	78
5T	36 kV	63A	830	314	259	59	103	24	120	98
		125A	939	346	296	-	107	34	120	98
		250A	939	346	296	-	112	34	120	98
7	10 kV	63A	912	331	300	70	110	24	100	78
7T		125A	1048	375	336	-	118	29	100	78
7T		250A	1048	375	336	-	118	29	100	78

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