Phase Sequence Relay – Advanced 3-Phase Supply Monitoring Protection by Trinity Touch
Introduction to Phase Sequence Relay Technology

A Phase Sequence Relay is a critical protection and monitoring device used in three-phase electrical systems to ensure correct phase sequence, detect phase loss, and identify voltage unbalance conditions. In modern industrial environments, improper phase sequence or phase failure can cause serious damage to motors, compressors, pumps, and other rotating machinery. To prevent such failures, Trinity Touch introduces a high-performance Phase Sequence Relay designed for reliability, accuracy, and long-term industrial use.

As a leading supply monitoring relay manufacturer, Trinity Touch offers advanced Phase Sequence Relay (PSR) and Phase Failure Relay (PFR) solutions in compact 17.5 mm and 22.5 mm DIN-rail mountable designs. These relays are engineered to protect critical loads by continuously monitoring three-phase supply conditions and responding instantly to faults.
Model numbers are as below:
Article No: 011709055
Model No: TT17-A415-1S-PSR
Article No: 011710022
Model No: TT17-A415-2S-PSR
Article No: 011715061
Model No: TT17-A415-1S-PSR-MI
Article No: 011708396
Model No: TT22-A415-1S-PSR
Article No: 011709096
Model No: TT22-A415-1S-PFR