Item No.: CO3301-4J

Time Overcurrent Relay

The panel contains a digital, three-phase overcurrent time relay. An integrated program is responsible for a self-test and the tripping test. The relay has three inverse current characteristics (normal, severely inverse and extremely inverse). The relay parameters can be set manually or in conjunction with a PC.

  • Nominal frequency: 50 to 60 Hz

  • Power consumption in the circuit path: 0.1 VA at IN =1A

  • Thermal load capacity of current circuit:
    Surge current (half-wave) 250x I
    N
    for 1s 100x IN
    for 10s 30x IN
    continuous 4x IN

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

  • Trip parameters:
    I > 0.5-2x I
    N
    I > 1-15x IN
    tI > 0-100s
    tI > 0-2.5s

  • LED indicators:
    "ON" for ready
    I> and I>> starting (flashing)
    I> and I>> tripping (permanently On)

  • Controls:
    "TEST" button to initiate the self-test
    6 potentiometers for adjusting operate and trip times
    8 DIP switches for adjusting the characteristics
    Adjustments for time factors and nominal data

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

  • Dimensions: 297 x 228 x 125mm (HxWxD)

  • Weight: 1kg