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Liaoning Jinli Electric Power Electrical Appliance Co.,Ltd

Linear Oil-immersed Tap Changer

Linear Oil-immersed Tap Changer

Linear Oil-immersed Tap Changer The on-load tap changing transformer can maintain voltages at desired levels by changing the tapping in primary winding of the transformer according to the load. It plays an important role in smart distribution grid. The key part of on-load tap changing...

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Product Details

Linear Oil-immersed Tap Changer

The on-load tap changing transformer can maintain voltages at desired levels by changing the tapping in primary winding of the transformer according to the load. It plays an important role in smart distribution grid. The key part of on-load tap changing transformers is on-load tap changer (OLTC), which is a complex mechanical device. The diverter switch of OLTC is traditionally accomplished in the oil. The Oil will be stained by arcing during operation and must be consequently purified by an oil filter.

In order to reduce the disadvantages of conventional oil switching OLTC, OLTC applied with vacuum switch is presented in this paper. This vacuum OLTC is driven by permanent magnetic actuator. The capacity and the switching reliability of the vacuum OLTC are remarkably enhanced. The electrical life as well as the maintenance interval of the OLTC has been extended. In consideration of the electromagnetic field on site, Programmable Logic Controller (PLC) is applied to the intelligent controller of OLTC. The action sequence of the vacuum diverter switch is programmed based on the structure of vacuum OLTC. The controller using PLC can greatly decrease the complexity of the OLTC control system and effectively improve the reliability and stability of the vacuum OLTC.

Model Explanation 

 SY□Z(Z) - □/□-□L
    S :  three-phase
    Y :  on load
    □:  voltage connection model
    Z :  adopting resistance transit
    Z :  direct switch
    □:  rated current
    □:  rated voltage
    □:  number of voltage regulation grades
    L :  online oil filter

Main Technical Data

Application Scope

Oil-immersed Distribution Transformer 

Connection Model

SYXZZ : three phase Y connection neutral point linear voltage regulation

SYJZZ : three phase central point bridge voltage regulation

SYTZZ : three phase any connection linear voltage regulation

Three-phase Max. Rated Current  

400A

Max. Rated Voltage

600V

Max. Voltage of Device Um

40.5KV

Tap Positions

17 or others

Connection Model Shows as Following 

image002.pngimage004.pngimage006.png
(Y connection neutral point) (Y connection neutral point with lead wire)(Y connection central bridge point) 
image008.pngimage010.pngimage012.png
(D connection central bridge point)(D connection terminal point) (Auto type terminal point)

Sample Outline Dimension Diagram 

image014.png

Sample Model Parameters

Serial number

Model No.

(A)

Rated

current

(v)

Rated

voltage

Installation dimension(mm)

H

H1

H2

H3

Md

1

SYXZZ 50/10 -3~5

50

10

615

305

120

60

M8

2

SYXZZ 100/10-5~9

100

10

682

350

125

66

M8

3

SYJZZ 100/10-5~7

100

10

750

440

125

100

M8

4

SYJZZ 200/35-5~9

200

35

1500

190

170

715

M12

5

SYJZZ 300/35-5~9

300

35

1500

190

170

715

M14

6

SYJZZ 400/35-5~9

400

35

1700

220

235

910

M16

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