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0102030405

W (1+2) star-delta transformation（Y-△）（Ⅳ）de-energized tap changer

Suitable for oil-insulated transformers with a maximum voltage grade of 220kV or lower and a rated through-current of 3000A or lower, this series enables tap changing in the de-energized state of the transformer. It provides the capability to adjust the effective turns of the transformer coil, thereby changing the transformer ratio and stabilizing the output voltage.

product details

Model Meaning

For example:W(1+2)ZⅡ630/40.5-6X5 S（Y）C W model is de-energized triple-phase cylindrical middle single bridge span, rated through-current 630 A, highest voltage for equipment 40.5kV, manual (with remote gear display), side operation, 6 tap, 5 gears, horizontal installation.

Advantages

1.Designed with simplicity in mind, the product has a compact installation size and can be installed flexibly.

2.Designed for a strong operation feel, the product ensures reliable contact and minimizes the possibility of misoperation.

3.Designed with an automatic reset feature, the contact resets automatically.

4.With a miniaturized transformer design and simplified tap changer and transformer connection, the electric field distribution is uniform, allowing for flexible layout configurations.

Advice for user selection and Utilization

Its body and operation parts are created independently, and there are several and varied ways to install it. In making your pick, kindly consider both the body model and the necessary working mechanism.
Lead and an actuated insulating rod are included as standard. Please include in the order notification and contract any special requirements. Before installation and usage, the operational insulation rod should be dried with the switch. Once dried, it is ready for use. If there are any specific needs, please take note of the thickness of the insulating paper covering the lead wire.
The neutral point connection technique of the transformer is not denoted by any symbol in the basic model.
A 20% margin should be reserved while choosing its current level, and a similar margin should be included.
The voltage level chosen must satisfy the power frequency and impact specifications for both longitudinal and main insulation.

Please specify any special requirements.

Please request the electronic drawing (in PDF or DWG format) and order specification before placing an order.
The clamp tap changer must be installed with both the transformer gripper and the clamp firmly in place. If not, the vibration will cause the clamp's body to move downward, triggering the control lever clutch.
For the radial outlet switch, it is not permitted to force the wiring tap lead root bending wire; instead, lead bending should follow the method of static rolling; the root insulation will bend after lead, so please bandage. For the tap changer and transformer coil tap connection, please connect to its body on the transformer.
Avoid harming the switch by using enough lubricant once it has dried.Its body and operating mechanism are distinct, and during the drying process, the operating mechanism is not dried.
It has a mechanical limit built into its operating mechanism. To prevent damage, do not go above the switch limit gear. When working, kindly utilize the impact force operation.
Please remove the mechanism during operation or the transmission mechanism during the core inspection or field debugging, mark before disassembly, and check the DC resistance and variable ratio to confirm correct installation.

Model Main Technical Specification

Main performance parameter		insulation level（kV）						Seal function	machinery life span (Time)	Rated through-current （A）	Short-circuit capacity
Highest working voltage(KV) Connection method		power frequency （1min）			Impact（1.2/50μs）						Thermal stability（3s）（kA）	Dynamic stability(kA)
Highest working voltage(KV) Connection method		To ground	Between phase	Between contacts Between the first and last	To ground	Between phase	Between contacts				Thermal stability（3s）（kA）	Dynamic stability(kA)
12	（Y,△）	45	45	20	100	100	70	0.25MPa 24h	2000	250	5	12.5
40.5	Y	100	40	30	230	120	90			400	6	15
40.5	△	100	100	30	230	230	90			630	7.5	18.75
72.5	Y	160	100	30	230	230	90			800	8	20
72.5	△	160	160	45	350	350	150			1000	10	25
126	Y	230	140	45	550	350	150			1250	12.5	31.25
126	△	230	230	55	550	550	175			1600	16	40
252	460	*	90	1050		285				2000	20	50

Schematic Diagram

Outline

W (1+2) Z star-delta transformation（Y-△ ）（Ⅵ）outline install measurement drawing.

"D" phase（1 phase）clamp-type installation; "L" phase（2phase）clamp-type installation.

Typical installation measurement	Voltage kV	Current A	Gear	Outline, installation measurement mm
				D1	D2	D3	d
W(1+2)Ⅳ250~630/12-3X2	12	250、400、400、630	2	180	190	D2 + d + δ, δ 40 to 50, where the larger the δ, the more convenient the bending of the lead.	1.5s + package insulation thickness S is the lead cross-sectional area (mm2)
W(1+2) Ⅳ250~630/40.5-3X2	40.5			200	217

Notice:Dimensions of 12kV and 20kV are consistent with 40.5kV size class, and 72.5kV size is consistent with 126kV class size. If there are special requirements, please give special instructions when ordering.

Outline Diagram of the Operating Mechanism

（1）Manual Operation（SS）

（2）Manual Operation（Remote gear display） S（Y）S

(3)Manual side operation（SC）

（4）Electric side operation（DC）