IKI-20

IKI-20

Short-circuit / earth short-circuit indicator

Item number: IKI-20
Properties The IKI-20 is suitable for the detection, indication and remote signalling of short... more
Product information "IKI-20"

Properties

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

Variants

Buffering of power supply

  • IKI-20T:

    Buffering of power supply via low voltage (110 ... 230 VAC); additional capacitor buffering for at least 12 h
  • IK-20U:

    Buffering of power supply via wide range auxiliary voltage input 24 ... 230 VAC/DC, capacitor buffering
  • IK-20B:

    Buffering of power supply via integrated lithium battery (lifetime >17 years with current transformers not connected)

Relay outputs as floating transient or permanent contacts

  • IKI-20X1:

    1 relay with 1 NO contact and 1 NC contact for all faults
  • IKI-20X2:

    2 relays with 1 NC contact or 1 NO contact for short-circuit and 1 NC contact or 1 NO contact for ground fault
  • IKI-20X3

    3 relays with 1 NC contact or 1 NO contact with common root for phase-selective faults at L1, L2, L3
Device data
Article numberIKI-20
Product designationIKI-20 Short-circuit / ground short-circuit indicator
Controls and display
Red LED (1)Collective display
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
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
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
Voltage supply
Insulation voltage1 kV / 1 min
CT-supplied
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.