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Type WST4 three phase tap changer (delta connection) 1

Type WST4 three phase tap changer (delta connection) 2

Type WST4 three phase tap changer (delta 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 (delta 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	N	H	H1	Regulating position
3	10 kV	63A	376	143	122	59	99	24	3	100	78	Central
		125A	431	163	142	59	107	29	3	100	78
		250A	431	163	142	59	112	29	3	100	78
		300A	530	203	169	69	112	34	3	106	78
	24 kV	63A	426	168	137	59	99	24	3	100	78
		125A	475	183	154	59	107	29	3	102	78
		250A	530	203	169	59	112	34	3	102	78
	36 kV	63A	526	218	157	59	103	24	3	120	98
		125A	580	228	179	59	107	34	3	120	98
		250A	580	228	179	59	112	34	3	120	98
5	10 kV	63A	520	191	170	59	99	24	5	100	78
		125A	605	221	200	59	107	29	5	100	78
		250A	605	221	200	59	112	29	5	100	78
		300A	734	271	237	69	112	34	5	106	78
	24 kV	63A	570	216	185	59	99	24	5	100	78
		125A	649	241	212	59	107	29	5	102	78
		250A	734	271	237	59	112	34	5	102	78
	36 kV	63A	670	266	205	59	103	24	5	120	98
		125A	784	296	247	59	107	34	5	120	98
		250A	784	296	247	59	112	34	5	120	98
7	10 kV	63A	674	244	223	70	110	24	7	100	78
7		125A	783	279	260	70	118	29	7	100	78
7T		250A	803	283	260	-	128	29	7T	100	78
7	36 kV	63A	818	314	255	70	113	24	7	120	98
7		125A	883	329	278	70	123	29	7	120	98
7T		250A	883	323	280	-	128	29	7T	120	98
9	10 kV	63A	818	292	271	70	110	24	9	100	78

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