IKI-23 Modbus
Directional fault indicator
Main functions
- Directional short-circuit and earth short-circuit detection
- Directional earth fault detection without balanced core CT
- Directional and non-directional load current measurement values
Additional features
- Integrated installation diagnosis function
- Configuration via DIP-switches or USB
- Fault prediction with intermittent earth fault detection
- Safety function: Step voltage monitoring with additional measurement rod
- Event history
- ModbusRTU interface
Fault detection
All methods can be activated seperately and can be easily configured.
 | Directional short-circuit detection |
 | Directional earth short-circuit detection |
 | Directional earth fault detection |
 | Directional earth-fault detection with transient method |
 | Earth fault detection with pulsation method (compensated networks only) |
 | Detection of intermittent earth-fault disturbances for fault prediction |
Device variants
| IKI-23 | IKI-23 Modbus | IKI-23_capdis | IKI-23_capdis Modbus | |
| Fault detection | x | x | x | x |
| Integrated LRM measurement point acc. IEC-61243-5 | 1) | 1) | x | x |
| Complete voltage detection system (VDS) CAPDIS_top acc. IEC 61243-4 integrated. | x | x | ||
| ModbusRTU interface | x | x |
1) on request
| Pickup current I> | 100 A, 200 A, 300 A, 400 A, 600 A, 800 A,1000 A, 2000 A (±15 %) |
| Pickup time | 40 ms, 60 ms, 80 ms, 100 ms, 150 ms, 200 ms (±10 ms) |
| Directional earth fault detection via transient method | Pickup values settable for U0, I0 and "wait for U0" |
| Earth fault detection with pulsation method | min. 2 A pulsation delta (at 7 A … 200 A phase apparent current ) min. 2 A pulsation delta(bei 200 A ... 300 A phase apparent current) symmetrical or asymmetrical pulsation pattern |
| Transient disturbance | min. duration of 1 ms for current and voltage transient |
| Reset | Button, external input, time2 h, 4h or automatic (load current detection, max. 6 h) |
| Measurement values | Range of voltage measurement: 1 kV … 52 kV (dependant on used LRM module) Range of current measurement: 5 A … 2000 A (short-time), max. constand current 800 A |
| Nominal frequency | 50, 60 Hz |
| Isolation voltage | 2 kV; 1 min. |
| IOs: | |
| Current transformers | IKI-LUM (item no. 2500381), CTs for mounting on bushings |
| Remote alarm | potential free wiper contacts, NO, max. 2s |
| Power of alarm outputs | Umax 110 VAC/DC, Imax 100 mA |
| Reset | Via external potential free NO contact |
| Remote test | Via external potential free NO contact |
| External blinking unit LED | three outputs to connect external blinkers (item no. 2500098) |
| Power supply: |
|
| Via auxiliary power | 24 … 230 VAC/DC (tolerance ±15 %) |
| Via CTs | IKI-LUM: min. 6 A three-phase, min. 18 A one phase |
| Type of battery | Lithium; 3,6 V; LS17500 |
| Housing: | |
| Type | DIN 43700 |
| Recommended cutout | 92 mm × 45 mm |
| Environmental conditions: |
|
| Operational temperature | -25 °C ... +55 °C |
| Storage temperature | -25 °C ... +70 °C |
| Degree of protection | IP 54 |
| Humidity | max. 95 % relative at 40 °C |
Retrofit of air-insulated switchgears
- Easy and economic retrofit solution
- Combined sensor for voltage and current
Monitoring dangerous step-voltages
- easy installation with an additional earthing rod
- output to connect an external LED blinker outside of the transformer station
Possible combinations with VDS
IKI-23 can be used either
- without voltage detection system (VDS) for non-directional fault detection
- with external VDS type CAPDIS
- with external retrofit VDS type CAPDIS-PI
- with plugged in VDS type CAPDIS-top
