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GSY Mho Distance Relay

GSY Mho Distance Relay

The Type CEX57 is a family of high-speed induction cup relays with angle impedance characteristics that can be set parallel to the impedance characteristic of a protected line. Generally, these relays are meant to be used with other protective relays in blinder applications to restrict the tripping zone of a scheme or they may be used in applications that require tripping for out-of-step conditions. These are a single-phase relays that includes two ohm units with opposite polarity and may also include an auxiliary telephone type unit.

The Type GSY51 relay includes a mho distance unit with reverse offset, six auxiliary telephone units and a target-seal in unit all mounted in one drawout case. This relay is intended for use with the CEX57E angle impedance relay to provide out-of-step protection for a generator.

End of life notice: The GSY has been discontinued as of October 1, 2013.
Read full notice.

  • Out-of-step generator protection