025 series
Compact width and high flexibility for your small power transformer



freccia

Key features

  • High performance, compact width.
  • Suitable for winding side assembling.
  • Microswitches for positioning monitoring available.
  • Motor Drive Unit applicable.


Technical data
Voltage class 72,5 kV, 100 kV, 123 kV, 145 kV, 170 kV
Rated current from 120 A up to 600 A
Number of positions from 2 up to 11 positions (up to 20 positions on special applications)
Available connections bridge, linear, inversion polarity

Download PDF
SPT 025 full catalogue pdf
Instruction manual pdf
Ordering sheet pdf

Product description

Thanks to the configuration in multiple columns, the tap changers from 025 series allows compact width together with high performance: a great combination that makes this series perfect for winding side assembling in small-power transformers, usually from 10 up to 50 MVA.

025-series tap changers are manufactured to withstand “E” thermal class and, for rated voltage higher than 145 kV, kraftpaper-wrapped rings are supplied on demand. For those application where bridge connection is involved, pressboard shields are also available.

The drive equipment can be integrated with mechanical block or microswitches for remote control.
Motor Drive Unit (MDU) is also available as an option and it is guaranteed for 20.000 maneuvres with no extraordinary maintenance.



Fixed contacts

CAP

Cap 120 - 120 A
Cap 200 - 200 A
Cap 300 - 300 A
Cap 400 - 400 A
Cap 600 - 600 A

Tubular

Sal 180 - 180 A
Sal 330 - 330 A
Sal 420 - 420 A
 
 

Flag

Flag B20 - 400 A
Flag B40 - 400 A
Flag B60 - 600 A
 
 

Basic connections

A

BRIDGE
CONNECTION

B

DOUBLE BRIDGE
CONNECTION

C

LINEAR
CONNECTION

D

DOUBLE LINEAR
CONNECTION

F

SERIES/PARALLEL
CONNECTION

G

LINEAR CONNECTION
WITH REVERSING SWITCH

H

DELTA/STAR
CONNECTION

I

EXCLUSION OF TURNS
CONNECTION

L

DELTA/STAR CONNECTION
WITH EXCLUSION OF TURNS

Handle drives

070-1.12.212

Mechanical block
 
 

pdf

070-1.12.212BE

Mechanical block
Microswitch for electrical block
 

pdf

070-1.12.101

Mechanical block
 
 

pdf

070-1.12.104

Mechanical block
Microswitch for electrical block
Microswitches for position transmitter

pdf

070-1.12.202

070-1.12.202-2

070-1.12.202BE

Mechanical block
Microswitch for electrical block
Microswitches for position transmitter

pdf

070-1.12.208

Mechanical block
 
 

pdf

070-1.12.209

Mechanical block
Microswitch for electrical block
 

pdf

070-1.12.501

Mechanical block
 
 

pdf

070-1.12.502

Mechanical block
Microswitch for electrical block
 

pdf

Layout configurations

Several configurations are available to our tap changers: please download the following PDF file and choose the most suitable layout for your project.

pdf  Download configurations

Motor Drive Unit (MDU)

One of the best advantages of 020 series is the possibility to apply our Motor Drive Unit: you can find additional information by downloading the following PDF files.

pdf  Download MDU

General features

  • All our tap changers are suitable for mineral oil-immersed transformers. Special executions for usage in synthetic and natural Ester fluids are also available upon request.

  • Drive handle and external parts can be provided with specific treatment in case of certain environmental conditions: with special gaskets for lower or higher temperatures; with anti-corrosive treatment for dust and very polluted air.

  • All our tap changers have padlockable drive for better safety and precision.

  • Customized solutions can be designed by our Technical Department according to the specific requirements of the single project.





TOP