Directional fault indicator for short circuits and earth faults

Part-No.: 2520461

Directed fault detection for all grids Direction detection, display and remote message of... more
Product information "IKI-22"

Directed fault detection for all grids

Direction detection, display and remote message of short circuits and  earth faults. In compensated and isolated nets, the direction of the earth fault is recorded using the earth fault wiper method.

Voltage information from the CAPDIS voltage test system

The voltage signals required for direction determination are obtained by means of a y-cable from the voltage system CAPDIS or CAPDIS-PI. 

Earth fault detection without balance current transformer

The sum signal is calculated from the three phase transformers. A balance current transformer is not required, which minimizes the installation effort.

Operation possible without auxiliary power

Short-circuit and earth fault detection (NOSPE and KNOSPE) are possible without connecting auxiliary energy. An unsecured auxiliary power supply is required for the directional detection of earth faults in compensated and isolated grids using the earth fault wiper method.

Simple to use and adjust

The operation and display of the device are designed according to the IKI-20 family: The LCD display shows the fault type phase-selectively. For AWE applications, the first and second fault are displayed in a differentiated manner. Two separate LEDs indicate the fault direction. The parameterization is carried out via DIP switches behind the front flap. The test/reset button is used for the function test and the reset of a fault display.



Technical data

Pickup current short-circuit

100, 200, 300, 400, 600, 800, 1000, 2000 A

Short-circuit pickup time

60, 80, 150, 200 ms

Pickup current earth fault

40, 80, 100, 200 A

Earth fault pickup time

60, 80, 150, 200 ms

Transient directional earth-fault detection:


Pickup value U0

20, 50% of nominal voltage

Pickup value I0

100, 200, 300, 500A

Wait for U0 after transient

0, 100 ms, 1 s, 5 s


Auto, 2 h, 4 h, external, button




Remote reset via external potential-free NO contact

   3 x signal input for current encoder (2-pin)
  Remote test input




Four wiper contacts, potential free

Electrical data

Umax = 110 V AC/DC, Imax = 0.1 A, Ron = 35 Ohm

Auxiliary power:


Integrated buffer

Lithium cell, 3.6 Ah, lifespan at least 15 years

Auxiliary power

24 ... 230 VAC/DC, power consumption max. 2 VA, required for earth fault wiper method




Front panel installation standard (DIN 43700)


96 x 48 x 80 mm (w x h x t)

Recommended cutout

92 x 45 mm (w x h)

Environmental conditions:


Operational temperature

–25 ... + 55 ° C

Storage temperature

–30 ... + 70 ° C

Degree of protection IP 40
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