Type 76 DC Relay

Full DataSheet and Specs:

High-Performance Type 76 DC Relay

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The SWARTZ® Type 76 DC Overcurrent Relay from SMC is the most widely accepted protective overcurrent device used in the transit industry today, having been successfully used in every major transit system. The overcurrent relay provides maximum protection for trolley wires, third rails, feeders and substations from intermediate or remote overload conditions such as bolted faults, arcing faults, and severe overloads. The solid-state design and rugged construction ensure dependable low maintenance operation under adverse conditions.

Features

Uni-Bi directional: mode indicating, field switchable
LED Meter - Accurate, easy to read
Draw out construction
Detector channels include:
- instant overcurrent: range 10-300 mv
- short-term overcurrent: range 10-110 mv
- long-time overcurrent
- rate of rise
Calibration controls: allows preset threshold and time delays on all protective channels
Internal Power Supply operates on and auto compensates for a range of DC inputs
Use with any shunt
For use with positive & negative conductors in DC Networks
Field Calibration

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DESCRIPTION

The type 76 Overcurrent Relay is an insulated current monitor and overcurrent relay that may be used for either the positive or negative conductors in DC power distribution networks. The device is designed as a stand-alone relay or may be used in conjunction with a Type 82 automatic recloser relay. In combination with a reclosing relay, it will automatically interrupt a fault and then reclose to continue service. SMC’s unique rate of rise channel. The Type 76 DC Overcurrent Relay front panel controls and are calibrated in millivolts so that the relay is compatible with any type of shunt. The built-in calibration components allow accurate field calibration of each channel and feeder current settings.