IKI-23 P

IKI-23 P

Universal fault indicator | directional | Modbus with integrated buffer

Item number: 2502208_H002

The complete fault detection with all proven fault detection algorithms for all network types... more
Product information "IKI-23 P"

The complete fault detection with all proven fault detection algorithms for all network types and independent of auxiliary power makes the IKI-23 the universal fault and load monitor for standard ring cable switchgear. It combines all the functionalities of the IKI-2x series in one power supply-independent device. Thanks to the buffering of Modbus communication by means of integrated capacitor storage, the IKI-23 P is the ideal retrofit solution for connecting existing systems and older stations to the control technology and promoting transparency and digitalization in these stations too.

The IKI-23 can be used in distribution network stations with and without connection to the telecontrol level.

Directional and non-directional load flow and fault detection

For directional fault and load flow measurement, connect a capacitive divider or a CAPDIS-Sx to the IKl-23.

  • directional short-circuit detection
  • directional ground short-circuit detection
  • directional static ground fault detection (wattmetric method), directional transient ground fault detection (wiper method), earth fault detection via pulse locating
  • suitable for all neutral point treatments
  • no summing transformer required

Auxiliary power independent

The IKl-23 does not require auxiliary power for fault detection; an auxiliary power connection is only required for remote transmission via Modbus.

Integrated Diagnostic Function

For correct directional fault indication, verification of the correct rotating field or transformer installation is essential. The IKl-23 displays the rotating fields self-explanatory.

Basic setting with DIP switch or USB

The basic settings can be made via DIP switches behind the maintenance flap. With the software KriesConfig the complete parameterization can be done via USB interfaces.

Early fault detection

  • Early fault detection by transient fault detection
  • Partial discharge trend detection together with CAPDIS-S2_55 (R5). This function is available in the version with Modbus.

Event memory

The device has an event memory with indication of the time duration, that has passed since the fault event. The event memory can be read out via Kries-Config and Modbus.

Step voltage warning

The voltage difference between switchgear ground and a second (grounded) point is continuously monitored by the IKl-23. If a dangerous potential difference occurs between these points during, for example, an earth fault, a warning message is displayed and reported. Step voltage monitoring increases protection for personnel and animals and provides an indication of insufficient or disturbed station grounding.

Retrofit of RMUs with installed IKI-22

RMUs with installed IKI-22 can easily updated by the IKI-23 for directional fault detection. Already installed current transformers of type IKI-LUG can be further used. Load monitoring is only possible with current transformers of type IKI-LUM.

Integrated buffering for Modbus transmission

The IKI-23 P is equipped with an integrated capacitor memory to buffer the Modbus transmission for up to 60 seconds in the event of a power failure.

Modbus interface

All device data can be transmitted remotely via the Modbus interface of the IKl-23. Auxiliary power is required for the Modbus function. If the power supply fails, Modbus communication is buffered for up to 60 seconds and data is transmitted.

Device data
Article number 2502208_H002
Quantity unit Piece
Product designation IKI-23 P Universal fault indicator | directional
Modbus with transmission time
Number of feeders 1
Firmware V16.0.0 or higher
Parameterization software KriesConfig
Configuration Via software Kries-Config (download at kries.com), Via DIP-switches behind front panel
Applicable current transformers The IKI-23 can be used with current transformers of type IKI-LUG as well as of type IKI-LUM. With the IKI-23 with Modbus, load flow values can only be transmitted if current transformers of type IKI-LUM are used.
Controls and display
Front display LC-Display and LEDs
Test button
Red LED (1) Error in direction of cable
Yellow LED (2) Fehler in Richtung Sammelschiene
Dimensions and installation instructions
Case height x width x depth 50 x 98 x 97 mm
Cutout height x width 45 x 92 mm
Norm cutout dimensions DIN IEC 61554:2002-08
Installation type Panel mounting
Sheet thickness 1.5 ... 2.5 mm
Operating conditions
Operating temperature -25°C ... 55°C
Storage temperature -25°C ... 70°C
Humidity max. 95 % relative humidity at 40° C
Protection class IP54 (Front)
Fault detection and failure forecast
Fault detection Individually selectable, any combinations possible
Star point types Short-term low-ohmic terminated neutral, Low-ohmic terminated neutral, Inductive terminated neutral, Isolated neutral
Directional short-circuit detection I>>
Threshold current short-circuit detection I>> [A] 100, 200, 300, 400, 600, 800, 1000, 2000
Threshold current short-circuit detection (I>>) adjustable via DIP [A]. 400, 600, 800, 1000
Automatic response threshold Short circuit detection
Threshold time short-circuit detection I>> [ms] 40, 60, 80, 150, 200
Threshold time short-circuit detection (I>>) adjustable via DIP [ms] 60
Waiting time after current switch-off (short-circuit detection) [ms] 0, 100, 400, 1200, 2000, 6000
Waiting time voltage switch-off (short-circuit detection) [ms] 0, 100, 400, 1200, 2000, 6000
Directional earth short-circuit detection Ie>>
Threshold current earth short-circuit detection Ie>> [A] 40, 80, 100, 200
Threshold time earth short-circuit detection Ie>> [ms] 40, 60, 80, 150, 200
Directional static earth fault detection Ie>;
Threshold current static earth fault detection Ie> 5 ... 30 A
Auxiliary power supply for directional static earth fault detection Ie>
  • with auxiliary power supply: no Balanced Core CT necessary
  • without auxiliary power supply: Balanced Core CT necessary
Directional transient earth fault detection Ie>
Threshold current transient earth fault detection 3I0 [A] 100, 200, 300, 500
Threshold voltage transient earth fault detection 3U0 [%] 20, 30, 50
Earth fault detection via pulse locating
Pulse length of pulse locating symmetrical / asymmetrical
Transient fault detection IIe>
Step voltage monitoring
Fault reset Auto, After 2h, 4h, Manually on the device, External potential-free normally open contact
Interfaces and communication
USB interface Mini-USB
Transmission protocols ModbusRTU with integrated buffer: 60 s
Modbus-RTU Slave
Slave test
Digital Inputs 1
Remote signalling 4 potential-free contacts

  • adjustable as wiping contact
  • adjustable as permanent contact when auxiliary power
is available.
Remote test Function test including switching of the remote signalling contacts possible by connecting a potential-free normally open contact to the slave input.
Switching capacity relay Umax 110 V AC/DC, Imax 100 mA
Connection of passive blinkers Three passive blinkers with LEDs can be connected.
Measurement values and functions
Measuring range voltage 1..52 kV (depending on the LRM module used)
Measuring range current 5..2.000 A (short-term), max. continuous current 800 A
Rotary field detection
Power supply
Auxiliary power supply 24 … 230 V AC/DC (jeweils  15 %)
Power consumption 2 W
Insulation voltage 2 kV; 1 min
Battery type Lithium
Notes on transformer supply
  • IKI-LUG-1500: from 5 A three-phase, from 15 A single-phase
  • IKI-LUM: from 6 A three-phase, from 18 A single-phase