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 I_{N =1A}

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

• 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 I_N
  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