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