Global site

ABB's website uses cookies. By staying here you are agreeing to our use of cookies. Learn more

Transformer protection and control RET620 IEC

Compact protection and control with voltage regulation for two-winding power transformers

RET620 is a dedicated transformer management relay for protection, control, measurement and supervision of both two-winding power and step-up transformers, including power generator-transformer blocks, in utility and industrial power distribution systems.

The transformer management relay has been designed to be the main transformer differential protection, with one multi-slope stabilized (biased) and one instantaneous stage, providing a fast and selective protection for phase-to-phase short circuits, winding interturn-faults and bushing flash-overs. There is also a choice between either low or high-impedance restricted earth-fault (REF) protection.

RET620 is also ideal for voltage regulation. The voltage regulator has been designed for power transformers with a motor-driven on-load tap-changer and offers both manual and automatic tap-changer control.

RET620 fully supports the IEC 61850 standard for communication and interoperability of substation automation devices, including fast GOOSE messaging and now also IEC 61850-9-2 LE process bus and Edition 2, offering substantial benefits in terms of extended interoperability. RET620 further supports both the parallel redundancy protocol (PRP) and the high-availability seamless redundancy (HSR) protocol, together with the DNP3, IEC 60870-5-103 and Modbus® protocols. With the protocol adapter SPA-ZC 302, Profibus DVP1 can also be used.

RET620 is a member of ABB’s Relion product family and part of its 620 protection and control series of relays.


Why ABB?


  • Withdrawable plug-in unit design for swift installation and testing
  • Extensive range of protection and control functionality for two-winding power transformers, including advanced and fast differential protection with high inrush stability
  • Support for various neutral earthing options, matching either high-impedance or numerical low-impedance restricted earth-fault principles
  • Automatic voltage regulation of power transformers with a motor-driven on-load tap-changer
  • IEC 61850 Edition 2 and Edition 1 support, including HSR and PRP, GOOSE messaging and IEC 61850-9-2 LE for less wiring and supervised communication
  • IEEE 1588 V2 for high-accuracy time synchronization and maximum benefit of substation-level Ethernet communication
  • Large graphical display for showing customizable SLDs, accessible either locally or through a web browser-based HMI

Are you looking for support or purchase information?

Loading documents

Related offering

Contact information

What would you like to do?

Submit your inquiry

Please select country from the list below
Country
Location
For this country please use ABB's partner contact details
Name
Company
E-Mail
Phone
Zip code
Your message
Cancel

Thank you for your inquiry and interest in ABB.
We will get back to you as soon as possible.

Back

An error occurred and your inquiry could not be sent.
Please try again later.

Back

Your local ABB Sales Team

Your local ABB's partner contact

Your local ABB Sales Team

Your local ABB's partner contact

Name
Address
 
Phone
 
Fax
 
E-Mail
 
 

Please select country from the list

Close

Submit your inquiry

Please select country from the list below
Country
Location
For this country please use ABB's partner contact details
Name
Company
E-Mail
Phone
Zip code
Your message
Cancel

Thank you for your inquiry and interest in ABB.
We will get back to you as soon as possible.

Back

An error occurred and your inquiry could not be sent.
Please try again later.

Back

Your local ABB Service Team

Your local ABB's partner contact

Your local ABB Service Team

Your local ABB's partner contact

Name
Address
 
Phone
 
Fax
 
E-Mail
 
 

Please select country from the list

Close

Submit your inquiry

Please select country from the list below
Country
Location
For this country please use ABB's partner contact details
Name
Company
E-Mail
Phone
Zip code
Your message
Cancel

Thank you for your inquiry and interest in ABB.
We will get back to you as soon as possible.

Back

An error occurred and your inquiry could not be sent.
Please try again later.

Back

Your local ABB Emergency Team

Your local ABB's partner contact

Your local ABB Emergency Team

Your local ABB's partner contact

Name
Address
 
Phone
 
Fax
 
E-Mail
 
 

Please select country from the list

Close

Authorized Value Providers

Close
Contact Service unavailable

ABB Web feeds

Customer events

  • Industry
  • Event