Station control unit for two feeders;
pulse detection method;
transient detection;
IEC-104 transmission protocol

Part-No.: 2520322

With the IKI-50 product line, flexible field control devices are available for local network... more
Product information "IKI-50_2F_PULS_EW_104"

With the IKI-50 product line, flexible field control devices are available for local network stations in various access routes. The IKI-50 is the right solution for intelligent local network stations and offers the distribution system operators a high degree of transparency and cost-effectiveness. Information is available both on site and in the central network control centre. Errors can be detected and localized immediately.


Load flow measurement

  • Voltages, currents, performances, cos-phi ...
  • Current and mean values
  • Limit value monitoring

Error detection

  • Short-circuit detection (directed, undirected)
  • Earth (short) final detection with four independent procedures
  • suitable for all star point treatments
  • no sum transformer required (exception: Wattmetric earth-fault detection)
  • Error early detection by means of transient error detection

Remote control and network automation

  • selective control of up to two motors (four digital inputs and outputs each)
  • Switching automatics
  • Extensive logic functions freely programmable via display or PC software KriesConfig

IKI-50 is maintenance-free

  • no battery
  • 6 h buffer due to internal maintenance-free capacitor module in combination with unsecured auxiliary voltage

Optional class 1 voltage measurement

  • via ohmic sensors instead of CAPDIS

Variants overview




Technical data



Degree of protection

IP 20

Isolation voltage

1 kV, 1 minute


DIN 43700

Recommended cutout

92 x 45 mm

Connection cable cross-section

max. 2.5 mm2

Operating temperature range

-25 ° C.. +55 ° C (max. 40 ° C during calibration)

Operating temperature range

-30 ° C.. +70 ° C extended range (measurement deviation 10%)

Storage temperature range

-25 ° C.. +70 ° C

Display buffer

6 h, maintenance-free capacitor buffer

Load flow readings:


Zero current I0


Phase currents I1, I2, I3


Phase angles I12, I23, I31


Zero voltage U0


Phase-Earth voltages U1, U2, U3


Phase-Phase voltages U12, U23, U31


Phase layers U12, U23, U31


P,Q,S and energy


Phase shift cos-phi




Mean values I, U, P, Q, S with direction A & B over duration dt


Min.- and max. values of mean values I, U, P, Q, S with direction A & B over duration dT


Min.- and max. values of the mean values I, U, P, Q, S with direction A & B since reset


Accuracy current measurement

3% of the measured value

Accuracy voltage measurement in conjunction with CAPDIS

3% of the measured value after calibration

Current measuring range

0.5 ... 1000 A

Input, outputs, messages, interfaces:


Digital output relays, max. 5 A

4 freely configurable

Digital inputs 24 VDC

4 freely configurable

RS-485 with Modbus RTU-Slave


RJ45 with IEC 60870-5-104 


Remote test function


Auxiliary power 24..230 VAC/DC, power consumption max. 3 VA


Conductor current Transformer


Sum current transformer for wattmetric earth-fault method optional


Y interface to CAPDIS


Self-test function, primary test function


Error prevention and error detection:


Short-circuit (I>>) with direction


Earth short-circuit (Ie>) with direction


Static earth fault (Ie> Wattmetric) with direction

- (Version _SW is recommended)

transient earth fault (Ie> wiper) with direction


Earth fault with pulse location method (Ie> Pulse location)


Directed capture of transient events for error prevention


Event Memory (1..20) Phase-Related Errors


Limit value monitoring for U, I, f, QU


self-programmable logic





Remote control of intelligent local network stations

Intelligent local network stations are often remotely controlled. However, the motor control may only take into account the switching states and the permissible switching currents (sham current and reactive current). The IKI-50 can issue control commands for motor operation via Modbus. The following example shows an application in a multi-field switchgear. In addition to the voltage measurement via capacitive dividers using the CAPDIS, measurements via ohmic dividers are also possible. The IKI-50 has an internal energy buffer for at least 6 hours. The motors and the telecontrol technology must be supplied by a secured auxiliary voltage, e.g. PSU-Hybrid. 




Automatic switchover

The automatic switching system is used to reduce the re-entry time to a minimum. If the synchronicity of the two feeding sources is not guaranteed, a pause time between the shutdown of the first feed and the connection of the reserve feed is always recommended. The logic for the automatic switching system can be configured either via the display or conveniently via the KriesConfig evaluation software.