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Larsen & Toubro Limited

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Relays

We offer a complete product range of Differential Protection Relay, frequency relays, reverse power relay and Thermal relay

Differential Protection Relay

  • Feature Two differential current levels, 2nd and 5th harmonic adjustable restraint levels etc.
Percentage Biased Transformer Differential Relay Automatic correction of CTs mismatch and Transformer Vector Group. Two differential current levels. 2nd and 5th harmonic adjustable restraint levels. Programmable percentage bias curve. Oscillographic recording. Modbus Communication Protocol. Maximum Demand & Inrush Recording
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Frequency Relays

  • Feature Over / Under Frequency protection, Over / Under Voltage protection etc.
Three-Phase Frequency Relay with dfdt & dvdt Control Over Under Frequency protection, Over Under Voltage protection, dfdt protection, dvdt protection, Up to 16 user programmable output relays, Event recording, Modbus Communication Protocol
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Reverse Power Relay

  • Voltage Input 110 / 415 V AC
MRP11 is micro controller based single phase, reverse power relay with one measuring element. Relay operates for pure active reverse power only and will not cause spurious tripping due to PF fluctuations in the system. Relay can work as a reverse reactive power relay with an addition potential transformer.
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Thermal Relay

  • Ratings 0.23A - 110A
  • temperature -5 C to +55 C
Thermal overload relays are protection devices required in various motor starter combinations. L&Ts 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.
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