Thermal Overload Relays

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Thermal overload relays are protection devices required in various motor starter combinations. L&T’s range of contactors complements its range of thermal overload relays. These are available for various DOL/ Star delta combinations.  They have a built-in sensitive mechanism which protects the motor from overload and single phasing.

Features of our thermal overload relays

Type RTX & MN-suitable for MNX contactors

  • Ratings: RTX Relay 0.23A-41A
  • MN Relay 0.2A-570A
  • Inbuilt single phasing protection
  • Suitable for direct/separate mounting
  • Built-in ‘START’ and ‘OFF / RESET’ push buttons
  • Auto and manual reset modes
  • Ambient temperature  compensation: -5 C to +55 C
  • Electrically separate NO contact
  • Conformance to IEC 60947-4-1 and IS/IEC 60947-4-1

Type RTO- suitable for MO contactors

  • Ratings: 0.23A - 110A
  • Phase failure sensitive
  • Visual status indication
  • Sealable transparent cover
  • Auto/manual reset function
  • Ambient temperature compensated
  • Conforms to IEC 60947-4-1 & IS/IEC 60947-4-1