Email:i-trade1@lnjldq.com Liaoning Jinli Electric Power Electrical Appliance Co.,Ltd

Liaoning Jinli Electric Power Electrical Appliance Co.,Ltd

On Load Tap-Changer

Tap changers exist in two primary types, no load tap changers (NLTC) which must be de-energized before the turn ratio is adjusted and on load tap changers (OLTC) which may adjust their turn ratio during operation. The tap selection on any tap changer may be made via an automatic system, as is often the case for OLTC, or a manual tap changer, which is more common for NLTC. Additionally, tap changers are often placed on the high voltage (low current) transformer winding for easy access and to minimize the current load during operation.

For many power transformer applications, a supply interruption during a tap change is unacceptable, and the transformer is often fitted with a more expensive and complex on load tap changing (OLTC, sometimes Load Tap Changer, LTC) mechanism. On load tap changers may be generally classified as either mechanical, electronically assisted, or fully electronic.


Model Explanation

SYZ(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

 

Sample Model Parameters

 

 

Serial number

 

Model   No.

 

(A)

Rated

current

 

(v)

Rated

voltage

 

Installation   dimensionmm

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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