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A2 Protection Relays

ASK A QUOTE

A2 protection relays are compliant to Enel specifications responding to all the requirements related to the protection and control of the systems constituting a typical primary cabin. Each model is equipped with a set of analog/digital inputs and outputs capable of fulfilling the functions required by the specific application:

  • DV901: MV line protection and control relay
  • DV905: MV translation protection and control relay
  • DV907: MV bar cuts-out protection and control relay
  • DV910: MV power factor correction protection and control relay
  • DV913: Substation alerts command control relay
  • DV917: HV lines protection relay
  • DV920: HV transformer protection and control relay
  • DV922: HV neutral forming transformer protection and control relay
  • DV925: HV transformer protection and control relay
  • DV926: Monitoring relay for Petersen coil
  • DV928: Monitoring relay for isolated or compensated earthing systems
  • DV933: HV/MV transformer voltage regulation relay
  • DV945: HV lines control relay
  • DV966: HV/MV primary substation neutral management relay
  • DV971: Monitoring device for primary substation auxiliary services

Benefits

Each model of A2 protection relay is designed to protect a specific asset.

The hardware architecture allows a quick wiring connection.

Simple and intuitive interface

Tesmec A2 Protection Relays for primary cabins

Technical Specifications

GENERAL RATINGS

Supply voltage 110 Vdc ±20%  
Power consumption -*

VOLTAGE ANALOG CHANNELS

Voltage channels Till 3*  
Inputs voltage level 0 - 100 Vac / 0 - (100/3) Vac
Operating frequency 47,5 - 52,5 Hz

CURRENT ANALOG CHANNELS

Current channels Till 4*  
Inputs current level 1 A / 5 A
Operating frequency 47,5 - 52,5 Hz

PROTECTION FUNCTIONS* (ANSI/IEEE)

50/51 (Overcurrent)
50N/51N (earth overcurrent)
67/67N (phase/earth directional)
59/59N (Overvoltage/ Neutral Overvoltage)
79 (auto reclosing)
25 (syncro-check)
50BF (Breaker failure)
2ndH REST (inrush current)

* According to the specific model