IKI-55 M

IKI-55 M

Feeder Control Units for distribution substations, with ModbusRTU (Slave)

Item number: 2502400_H001
The IKI-55 Feeder Control Unit can be used in load switchgear for directional fault detection,... more
Product information "IKI-55 M"

The IKI-55 Feeder Control Unit can be used in load switchgear for directional fault detection, load flow measurement, and control of load and ground switches. Likewise, a number of automation and monitoring functions are available with the IKI-55.

The IKI-55 is network-capable in its basic version and can communicate with the control station and other remote stations via various communication protocols. It can also be used as a Modbus master. The IKI-55 M is a Modbus-only variant.



The IKI-55 is designed for the connection of small-signal current transformers according to IEC 61869-10 as well as small-signal voltage transformers according to IEC 61869-11. In conjunction with a sensor adapter, conventional conversion transformers for current measurement as well as capacitive and precision dividers can be connected.

Fault detection

  • Directional short-circuit detection
  • Directional ground short-circuit detection
  • Directional ground fault detection with static and transient fault detection
  • Ground fault detection via pulse locating
  • Suitable for all neutral point treatments
  • No summing transformer required
  • Fault recording with export as Comtrade file

Early fault detection

  • Fetection of transient faults (Intermittent ground faults)
  • In conjunction with a CAPDIS- S2_55 (R5): Detection of partial discharges and their frequency and trend

Load flow measurement

  • Voltages, currents, powers, frequencies, cos phi
  • Momentary and average values
  • Cross calibration (With additional adapter)
  • Phase comparison function for voltages (With additional adapter)

Comprehensive control and monitoring functions

  • Control of motor controllers for switching load and ground switches
  • Free programmable logic functions
  • Automatic Transfer Switch (ATS)
  • Limit value monitoring

Simple operation of the unit

  • Additional LEDs to indicate the fault direction
  • Self-explanatory operation via direction keys

Extended safety features

  • User roles safety concept, password protected
  • Remote firmware update via REST interface (deactivable)
  • USB interface deactivable

Communication protocol

  • ModbusRTU-Slave

Comparison of products

IKI-55 M
2502400_H001
IKI-55
2502400_H003
Level of digitalisation22
Directional short-circuit detection I>>
Directional earth short-circuit detection Ie>>
Earth fault transient detection
Pulsation detection
Directional static earth fault detection Ie>;
Slave test
Modbus-RTU
Modbus RTU Master-
Modbus-RTU Slave
IEC 60870-5-104 Slave-
MQTT-
REST API-
LAN connection-
Encryption of communication (LAN)TLS
CT-supplied--
Auxiliary power supply24 VDC/AC +/-20%24 VDC/AC +/-20%
USB interfaceMini-USBMini-USB
PT100 input for temperature compensation of sensors--
Digital Inputs66
Digital Outputs66
Digital IOs configurableYesYes
Switching functions feeder control unitSwitching of up to two load switches
1.5-pole switching
Switching of up to two load switches
1.5-pole switching
Digital outputs for 1.5 pole switching22
Voltage inputs1 (With additional adapter 2: 2x LRM/CAPDIS or 1x LRM/CADPIS + 1x precision 3.25V)1 (With additional adapter 2: 2x LRM/CAPDIS or 1x LRM/CADPIS + 1x precision 3.25V)
Voltage measurement
Precision voltage measurementYesYes
Current measurement
Logic functions programmableA total of 32 logic rules can be programmed.A total of 32 logic rules can be programmed.
Balanced core CT optional--
Stromwandlerliste für VergleichstabelleIKI-LUM_d92 Split-Core Transducer with cable tie (set) | Ø 92mm (2512106_H001)
IKI-LUM_d92 Split-Core Transducer for C-Cone-Bushings (set) | Ø 92mm (2512106_H003)
IKI-LUM_d92 Split-Core Transducer for SIEMENS-Bushings (set) | Ø 92mm (2512106_H004)
IKI-LUM_d92 Split-Core Transducer with cable tie (set) | Ø 92mm (2512106_H001)
IKI-LUM_d92 Split-Core Transducer for C-Cone-Bushings (set) | Ø 92mm (2512106_H003)
IKI-LUM_d92 Split-Core Transducer for SIEMENS-Bushings (set) | Ø 92mm (2512106_H004)
TE trend monitoring
  • In conjunction with CAPDIS-S2_55 (R5)
  • Indication on the display, transmission via Modbus-RTU
  • Partial discharge trend via frequency distribution; integration over 24 h, trend over 72 h
  • In conjunction with CAPDIS-S2_55 (R5)
  • Indication on the display, transmission via Modbus-RTU
  • Partial discharge trend via frequency distribution; integration over 24 h, trend over 72 h
Device data
Article number2502400_H001
Quantity unitPiece
Product designationGrid Controller IKI-55 M | ModbusRTU
Number of feeders1
Parameterization softwareKriesConfig
ConfigurationVia HMI and display (limited), Via software Kries-Config (download at kries.com)
Firmware updateVia USB interface
Operating elements and display
Front displayLC-Display and LEDs
Direction keys1 - 4 for navigation in menu
Red LED (1)Error event detected
Yellow LED (2)Device warnings
Dreen LED (3)Status message device state
Yellow LED (4)Fault detected in the direction of the busbar
Red LED (5)Error event detected in the direction of the cable
Dimensions and installation instructions
Case height x width x depth48 x 96 x 110 mm
Cutout height x width45 x 92 mm
Norm cutout dimensionsDIN IEC 61554:2002-08
Installation typePanel mounting
Operating conditions
Operating temperature-40°C ... 70°C
Storage temperature-40°C ... 80°C
Protection class front sideIP54
Protection classIP40 / Front IP54
System frequency50 Hz / 60 Hz (selectable)
Fault detection and failure forecast
Fault detectionIndividually selectable, any combinations possible
Star point typesShort-term low-ohmic terminated neutral, Low-ohmic terminated neutral, Inductive terminated neutral, Isolated neutral
Short circuit detection I>>
Directional short-circuit detection I>>
Threshold current short-circuit detection I>>50 A – 1,000 A
Threshold time short-circuit detection I>>40 ms – 5 s
Earth short-circuit detection Ie>>
Directional earth short-circuit detection Ie>>
Threshold current earth short-circuit detection Ie>>10 A – 1,000 A
Threshold time earth short-circuit detection Ie>>40 ms – 5 s
Directional static earth fault detection Ie>;
Threshold current static earth fault detection Ie>2 A – 30 A
Threshold time static earth fault detection Ie>200 ms – 2 s
Directional transient earth fault detection Ie>
Threshold current transient earth fault detection 3I01 A – 1,000 A
Threshold voltage transient earth fault detection 3U00.1 kV – 100 kV
Earth fault detection via pulse locating
Pulse length of pulse locatingsymmetrical / asymmetrical
Transient fault detection IIe>
TE trend monitoring
  • In conjunction with CAPDIS-S2_55 (R5)
  • Indication on the display, transmission via Modbus-RTU
  • Partial discharge trend via frequency distribution; integration over 24 h, trend over 72 h
Fault resetAuto, Manually on the device, After time (1 h ... 8 h, configurable)
Reset settingTime: 1 - 1 h; manual, auto
Event log20 events
Fault recorder
Fault record - formatsComtrade
Fault record - number20
Fault record - recording duration2,5 s at 50 Hz | 2,09 s at 60 Hz
Fault record - Frequency6,4 kHz at 50 Hz | 7,68kHz at 60 Hz
Fault record - Pretrigger0,31 s at 50 Hz | 0,258 s at 60 Hz
Earth fault transient detection
Directional earth short-circuit detection
Interfaces and transmission protocols
USB interfaceMini-USB
Transmission protocolsModbus-RTU (Slave)
Modbus-RTU
Modbus RTU Master-
Modbus-RTU Slave
Modbus transmission rates [kBd]9600, 19200, 38400, 57600, 115200
MQTT-
REST API-
IEC 60870-5-104 Slave-
LAN connection-
Slave test
Digital Inputs6
Digital inputs - connectionsPush-In, Connection of solid and stranded conductors: 0.08 to 0.5 mm² | Connection of stranded conductors with ferrule: 0.25 to 0.34 mm²
Digital inputs - switching thresholdsON > 19 VDC / OFF < 10 VDC
Digital inputs - voltage ranges24 DC to 60 VDC
Digital inputs - current consumptionMax. 6 mA
Digital Outputs6
Digital outputs for 1.5 pole switching2
Digital outputs - connectionsPush-In, Connection of solid and stranded conductors: 0.08 to 0.5 mm² | Connection of stranded conductors with ferrule: 0.25 to 0.34 mm²
Digital outputs - variantsFloating
Digital outputs - switching capacity1 A at 30 VDC
Digital outputs - dielectric strengthMax. 80V
Digital IOs configurableYes
Switching functions feeder control unitSwitching of up to two load switches
1.5-pole switching
Voltage input Input impedance2 MOhm, 50 pF
Voltage input Input range0,4 V – 4,1 V
Voltage input measurement accuracy1%
Voltage input transformation ratio10000:1 (settable)
Voltage input standardIEC 61869-11
Current input VersionRogowski current sensor
Current input Input impedance10 MOhm, 50 pF
Current input Measuring range0,1 A up to 2000 A
Current input Measuring accuracy1%, +- 0.5 A
Current input Ratio50 A / 22,5 mV (50Hz) (settable)
Current input standardIEC 61869-10
PT100 input for temperature compensation of sensors-
Voltage inputs1 (With additional adapter 2: 2x LRM/CAPDIS or 1x LRM/CADPIS + 1x precision 3.25V)
Measurement values and functions
Voltage measurement
Phase-to-ground voltages
Phase to phase voltages
Precision voltage measurementYes
Current measurement
Active power
Reactive power
Apparent power
Rotary field detection
Frequency measurement
Limit value monitoringParameterizable
Logic functions programmableA total of 32 logic rules can be programmed.
Power supply
Auxiliary power supply24 VDC/AC +/-20%
Power input - power consumption0.5 A
Power supply input - connectionsConnection of solid and stranded conductors: 0.2 to 2.5 mm2 / Connection of stranded conductors with ferrule: 0.25 to 1.5 mm2 / Connection of stranded conductors with ferrule without plastic collar: up to 2.5 mm2
CT-supplied-