MRS1 Negative Sequence Relay

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General HighTECH Line User Manual

The MRS1 relay is a negative sequence protection relay with universal application. It serves for negative sequence protection of three-phase generators.

With a large number of different tripping characteristics and adjustment possibilities, the tripping characteristic can be made suitable for almost every type of generator with regard to its special thermal time-constant.

There is a choice between an independent or an inverse time tripping characteristic.

In case of low unbalanced load, a warning is given after an adjustable time delay. In case of inadmissible high unbalanced load, the MRS1 relay trips in accordance with the set characteristic.

Benefits and Key Features

  • 19“ racks – fully withdrawable

  • Door mounting – withdrawable and sealable

  • Panel mounting – fully withdrawable

  • Fault / disturbance recorder

  • Intuitive HMI

  • Display (of primary values)

  • Easy setting software – Smart view

  • Compact form factor


Protection of electrical (HV, MV) synchronous generators against:

  • Negative sequence protection (ANSI / IEEE C37.2: 46)

Inputs and Outputs
Binary inputs 2
Current transformer inputs 3
Output relays 3
Watchdog relay 1
Protection ANSI
Negative sequence protection 46
Additional Features
Parameter sets 1
Mounting Type
Housing is withdrawable
Housing suitable for 19” rack mounting (Option)
Housing suitable for door mounting (Option)
Housing suitable for mounting plate

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