Relay Maintenance

Relay Maintenance



Fees Structure : 25500 ₹+18% GST = 30000 ₹

Eligibility for Electrial System Design : Degree/Diploma/ITI in Electrical/Electronics Engineering

Duration
  • Full time : 1 Month
  • Part time : 3 months

Syllabus

For the steady functioning of power system and to prevent it get happened from the faulty phenomenon , protection of power system is necessary. Relay has important role under electrical system protection.

  • Basics of protective relaying.
  • Different types of relays.
  • Description of relays.
  • Construction of relays.
  • Operating principle.
  • Relay coordination.
  • Relay setting.
  • Relay discrimination.
  • Maintenance and commissioning of protective relays.
  • Inspection and testing of protective relays.
  • Comparison of relays.
  • Industrial application of relays(Substation).
  • Relay protection scheme-
  1. Undervoltage relay
    • Instantaneous U/V relay
    • 27A-instantaneous U/V Relay
    • 158/159U/Vrel

  2. Over Current relay
    • 50/51 O/C relay
    • IDMTL O/C relay(Inverse type)
    • IDMTL+Instantaneous O/Crelay
    • Directional O/C relay(inverse type)

  3. Earth Fault Relay
    • Earth fault relay(Inverse type)
    • IDMTL Earth fault relay(inverse type)
    • 51G-IDMTL Earth fault relay
    • 64R-Instantaneous REF Relay
    • 51N-IDMTL Earth fault relay
    • 50N-Instantaneous Earth fault relay
    • REF 541

  4. Fuse failure relay

  5. Definite time relay

  6. RET 615

  7. Neutral Displacement Relay

  8. RS 41

  • VAP Type-Fuse failure relay
  • CDG 11 Type-Inverse time over current and Earth fault relay
  • CAG 12/12Gtype-Instantaneous over current and Earth fault relay
  • VAX Type-Trip circuit supervision Relay
  • VAT Type-Definite time delay relay
  • VAJH Type-High speed tripping Relays
  • VAA/CAA Type-Auxiliary relay
  • VAG Type-Instantaneous Voltage relay
  • CDD Type-Directional inverse time over current and Earth fault relay
  • DMH Type-High speed biased differential relay
  • CAG Type-Instantaneous high stability circulating current relay
  • CTIG TYPE-Local breaker backup relay
  • PGD Type-Polyphase directional relay
  • VAR 21/VAR 41B/VAR 42/VAR 71/VAR 81-Auto Reclose relay