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Liaoning Jinli Electric Power Electrical Appliance Co.,Ltd

Neutral Point on Load Tap Changer

Neutral Point on Load Tap Changer

N eutral P oint O n L oad T ap C hanger Implanting-composed resistance transition is adopted for type SY□ZZ on load tap changer series, that is, functions of tap selector and diverter switch are combined together, and in the meantime the tap changer and the electrical drive mechanism are...

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Product Details

Neutral Point On Load Tap Changer

Implanting-composed resistance transition is adopted for type SY□ZZ on load tap changer series, that is, functions of tap selector and diverter switch are combined together, and in the meantime the tap changer and the electrical drive mechanism are designed as inserting structure in whole. Type SY□ZZ is with many advantages, such as simple structure, long service life span and easiness for installation and maintenance. Type SY□ZZ is designed and produced according to IEC 60214 standard.

On-load tap changer for large transformers: Here, tap selector and diverter switch are separate and arranged on top of one another. The oil in the diverter switch compartment is kept apart from the transformer oil. In order to adapt the voltage ratio to the requirements of the system, the transformer has a special winding with tapping. The voltage ratio can thus be changed either by a no-load tap changer after switching off the transformer, or under load with an on-load tap changer. Motor drives are available for operating the on-load tap changers. These can be controlled either locally or by remote control. No-load tap changers are normally set manually.

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

Max. Tap Positions

17 or others

Connection Model Shows as Following 

image002.png image004.png image006.png
(Y connection neutral point) (Y connection neutral point with lead wire) (Y connection central bridge point) 
image008.png image010.png image012.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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