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Transmission Protection

Blazing fast subcycle protection

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The rapidly evolving grid system has created new challenges for conventional transmission protection systems. At the same time, increasing consumer demand has resulted in a tremendous spread of transmission lines. Transmission lines, operating at 66 kV and above, are considered the backbone of the power system, moving power from the generation end to the distribution end. The transmission protection products by EPESOL provide one of the most reliable solutions for transmission line protection. With support for the latest IEC 61850 station and process bus, merging units, and as fast as 1/4th of the power cycle tripping, the transmission line protection products by EPESOL are the best in the industry.

D60

  • High end cost effective solution
  • High Speed protection with Single and three pole tripping
  • Embedded Synchrophasor measurement capabilities
  • Backup protection for generators, transformers and reactors
  • Support IEC 61850 Ed2, DNP3.0, IEEE 1588 , IEC 60870-5-104/103 Communication Protocols

P841

  • Multifunctional line terminal IED
  • Control and back-up protection in transmission and sub-transmission feeder bays
  • Circuit Breaker failure protection
  • 10 fully programmable function keys and tri-color LEDs

P441

  • Distance protection relay
  • Flexible, fast and reliable protection of transmission and sub-transmission lines
  • Ideal for single circuit breaker application, single and/or 3-pole tripping
  • Communication protocols including IEC 61850 and redundant Ethernet ports
  • Integration within digital substation process bus architectures using EC61850-9-2 interface

P443

  • Distance protection relay with unparalleled speed, security and selectivity
  • Speedy protection to trip and isolation
  • Access to automation IED configuration

L90

  • Segregated Line current distance and differential protection for overhead as well as underground transmission
  • High speed, phase segregated fault clearance for both single and three phase
  • Works for multi voltage level
  • Can reduce failover time to 0 through IEC62439-3 PRP support
  • Support IEC 61850 Ed2, DNP3.0, IEEE 1588, IEC 60870-5-104/103 Communication Protocols

P541/542

  • High speed current differential unit protection for overhead and underground transmission line
  • Economy solution for distribution application
  • Choice of communication protocols (IEC 60870-5-103, Modbus & Courier)
  • Harsh environment coating

P543/544/545/546

  • Distance and differential protection for overhead as well as underground transmission
  • Ideal for HV, EHV and UHV applications on lines and cables of any length.
  • Harsh environment coating
  • Unparalleled speed, security and selectivity

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Busbar 

Protection

 EPESOL provides high impedance as well as low impedance, centralized and decentralized busbar protection with the possibility of protecting 6 bays at a time.

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Digital

Substation

A window to four step full grid modernizations with the implementation of complete digital substation, including process bus (IEC-61850-9-2 LE).
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Retrofit

Solution

EPESOL provides complete retrofit solution form study to design and implementation uniquely transforming the old parameters to new one, while maintaining the whole system
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Auxiliary

Equipment

The best in class, complete range of trip, lockout, and supervision relays and test blocks to meet each application requirement.
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