Item No.: CO3301-4K

Earth fault voltage Relay

The training panel contains a digital three-phase relay for detecting earth-faults with isolated and low-resistance earthed, primary distribution networks (ANSI 59N). The relay parameters can be set manually or in conjunction with a PC.

  • Nominal frequency: 50/60 Hz

  • Power consumption: 1VA

  • Thermal load capacity: 520V

  • Output relay:
    Switch-on current: 20A
    Nominal current: 5A
    Max. contact rating:
    1250 VA/DC; 120W/DC, ohmic
    500VA/AC; 75W/DC, inductive

  • LED indicators:
    "ON" ready
    "Ue" starting (flashing); for release (permanently on)

  • Controls:
    "TEST" button for testing the relay function and the LEDs
    2 potentiometers for adjusting the release ranges
    Ue > coarse and fine adjustments
    1 potentiometer for adjusting the release times
    DIP-switch for: NC, factor for Ue>, selection of the nominal frequency and adjustment of the hysteresis

  • Inputs/outputs: 4mm safety sockets

  • The integrated interface RS 485 is suitable for setting the relay parameters. It is also possible to store and transmit measured relay values to and from the PC. Optical signal transmission guarantees galvanic isolation.

  • Indicators ot the interface:
    1. LED green = operation indicator
    2. LEDs green = data transfer

  • Dimensions: 297 x 114 x 125mm (HxWxD)

  • Weight: 1kg