SE-703 Series

Earth-Leakage Monitor

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The SE-703 is a microprocessor-based earth-fault relay for resistanceand solidly earthed systems. It offers sensitive earth-fault detection as low as 25 mA and can be used on systems with significant harmonic content. The SE-703 provides feeder-level protection or individual-load protection. The output contacts can be connected for use in protective tripping circuits or in alarm indication circuits. The analog output can be used with a PLC or a meter. The SE-703 is specifically designed to be AS/NZS 2081 compliant to either 2011 or 2002 (see ordering options).

Features & Benefits

  • Adjustable pickup (25-500 mA)

    Adjustable trip setting provides a wide range of lowlevel protection and system coordination

  • Adjustable time delay (INST-500 ms)

    Adjustable trip delay allows quick protection and system coordination

  • Output contacts

    2 Form C ground-fault output contacts for operation of separate annunciation and trip circuits

  • Analog output (0-5 V)

    Allows for connecting an optional meter (PGA-0500) or control system

  • CT-Loop monitoring

    Alarms when CT is not connected

  • Contact operating mode

    Fail-safe operating mode for undervoltage applications, optional non-fail-safe mode available

  • Harmonic filtering

    Eliminates nuisance tripping

  • Non-volatile trip memory

    Retains trip state while de-energized to simplify troubleshooting

  • Microprocessor based

    No calibration required, saves maintenance cost

  • Universal power supply

    Allows operation in application where one side of PT is faulted, provides flexibility for numerous applications

  • Global certifications

    Compliant with US, Canadian, European, and Australian standards for applications in almost any country

SE-703 Datasheet

SE-703 Manual


  • IEEE Device Numbers: Ground fault (50G/N, 51G/N)
  • Input Voltage: See ordering information
  • Dimensions: H 75 mm (3.0"); W 55 mm (2.2"); D 115 mm (4.5")
  • Trip Level Settings: 25-500 mA
  • Trip Time Settings: INST-500 ms
  • Contact Operating Mode: Fail-safe (x=0 models) or selectable (x=2 models)
  • Harmonic Filtering: Standard feature
  • Test Button: Standard feature
  • Reset Button: Standard feature
  • CT-Loop Monitoring: Standard feature
  • Output Contacts: Two isolated Form C contacts
  • Approvals: CSA certified, UL Listed (E340889), CE (European Union), RCM (Australian)
  • Compliance: AS/NZS 2081:2011 (x=0 models) or AS/NZS 2081: 2002 (x=2 models)
  • Analog Output: 0-5 V
  • Conformally coated: Yes
  • Warranty: 5 years
  • Mounting: DIN, Surface (standard) Panel (with PMA-55 or PMA-60 adapter)

Ordering Information

120/240 VAC/VDC
12/24 VDC
48 VDC
24 VAC


EFCT Series
SE-EFVC Voltage Clamp



EFCT Series Ground-Fault Current Transformer
Required zero-sequence current transformer specifically designed for low-level detection.

PGA-0500 Analog % Current Meter
Optional panel-mounted analog meter displays groundfault current as a percentage of the set-point or 5 A.

PMA-60 Series – Mounting Adapter
Required when panel mounting for AS/NZS 2081:2011 compliance