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735 Feeder Protection System

  • Features: Three-phase and ground feeder protection.

The 735 is a microprocessor-based relay used to perform primary circuit protection on distribution networks at any voltage level. Protection features include three-phase timed overcurrent, phase instantaneous overcurrent, ground timed overcurrent, and ground instantaneous overcurrent. Each protection element can be selectively enabled by the front panel dial settings. Flexible settings and selectable curve shapes enable accurate coordination with other devices. Installation and maintenance costs are lower when the 735 is used instead of the 8 separate overcurrent protection devices it has been designed to replace.

Protection & Control

  • 3 phase time overcurrent
  • Ground time overcurrent
  • 5 curve shapes
  • 4 curve shift multipliers per curve
  • 10-time mulipliers per curve
  • ANSI, IAC or IEC/BS142 curves
  • Phase instantaneous overcurrent
  • Ground instantaneous overcurrent
  • Pickup level for each overcurrent
  • Outputs: trip, aux trip, service
  • Aux trip: 86 lockout, ground trip

Monitoring & Metering

  • Trip record of last 5 trips
  • Pre-trip data includes currents
  • True RMS sensing

User Interface

  • 8 LED trip indicators
  • 4 LED status indicators
  • Current bar graph, % of CT
  • PS485 or RS422 communications
  • ModBus RTU protocol
  • Baud rate up to 19200 bps
  • 28

    Years in Business

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    Service Shop

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    Secure Laydown Area

  • 500+

    Pieces of Test Equipment

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