Short-circuit / earth fault indicator, capacitor-buffered, auxiliary power 110 - 230 VAC, 2 relay outputs N/O contact

Item number: 2501975
The IKI-20 is suitable for the detection, indication and remote signalling of short circuits in... more
Product information "IKI-20T2"
The IKI-20 is suitable for the detection, indication and remote signalling of short circuits in power distribution networks. In addition, in power distribution networks with rigidly, low-resistance or short-time low-resistance grounded neutral point, the detection, indication and remote signalling of ground short-circuits is possible. Non-directional earth faults can be indicated in cleared or isolated networks.

The IKI-20 is maintenance-free because the power supply is provided by the current transformers.

Measurement functions and display

  • Reliable measured value processing through independent overcurrent-time characteristic (UMZ measurement function)
  • True current measurement
  • Self-explanatory LCD-. symbols
  • additional very bright LED flashing display

Universal setting option of operating parameters

  • response current and response time separately for short circuit and earth short circuit
  • reset mode resp. reset time
  • Relay functions duration or wiping contact

Self test

  • Function test on site by means of test button or remotely controllable via auxiliary input

Operation in ring and beam network (without switching)

  • Differentiated display of first and second fault event in networks with AWE

Buffering of power supply

  • Using low voltage (110... 230 VAC); additional capacitor buffering for at least 12 h

Relay outputs as floating transient or permanent contacts

  • 2 relays with 1 NC contact or 1 NO contact for short circuit and 1 NC contact or 1 NO contact for ground fault
Device data
Article number2501975
Product designationIKI-20T2 Short-circuit / earth fault indicator | capacitor-buffered | auxiliary power 110 - 230 VAC | 2 relay outputs N/O contact
Controls and display
Red LED (1)Collective display
Buffer of power supplyCapacitor over at least 12h
Dimensions and installation instructions
Case height x width x depth48 x 96 x 80 mm
Cutout height x width45 x 92 mm
Norm cutout dimensionsDIN 43700
Installation typePanel mounting
Operating conditions
Operating temperature-25°C ... 75°C
Storage temperature-30°C ... 75°C
Protection classIP40
Fault Detection
Short circuit detection I>>
Threshold current short-circuit detection I>> [A]100, 200, 300, 400, 600, 800, 1000, 2000
Threshold time short-circuit detection I>> [ms]60, 80, 150, 200
Earth short-circuit detection Ie>>
Threshold current earth short-circuit detection Ie>> [A]40, 80, 100, 150
Threshold time earth short-circuit detection Ie>> [ms]60, 80, 150, 200
Fault resetAuto, Manually on the device, After 2h, 4h, External potential-free normally open contact
Interfaces and communication
Slave test
Switching capacity relayUmax = 220 Vdc, 250 Vac Imax = 0,1 A
Relay outputs2x (NO)
Power supply
Auxiliary power supply110 - 230 VAC
Insulation voltage1 kV / 1 min
Notes on transformer supplyWith a primary current of >=5A through a split-core CT at the inputs L1, L2 or L3, the energy supply is made from the sensors. At primary currents <4A, power is supplied from the energy buffer. With primary currents 1A <I <5A, a mixed supply takes place.