Transformer monitor, Protection Relay according to EN 60255, LCD and USB, 24V release

Item number: 2503290_H003
The IKI-35 is a compact overcurrent protection relay and is suitable as overload, short-circuit... more
Product information "IKI-35_24V"
The IKI-35 is a compact overcurrent protection relay and is suitable as overload, short-circuit and earth short-circuit protection in combination with circuit breakers or power isolators, as well as overload protection in combination with load disconnectors and HRC fuses. The IKI-35 can be parameterized via menu or software.

Current transformer supplied protection relay

- Application as transformer protection 
- Availabe with wide range converters
- Overcurrent, short-circuit, and earth fault stage
- Intuitive operation thanks to menu navigation
- Inrush suppression
- Event memory
- Earth fault protection by balance current transformer or calculation from the phase current transformers possible 

Trigger characteristics 

- DMT I> (ANSI 51)
- IDMT I>, four characteristic curves (ANSI 51) 
- 2 short-circuit levels I>>, I>>> (ANSI 50) 
- External quick-trigger 
- Earth fault level DMT or IDMT Ie> (ANSI 51N or 51G) 
- Instant earth fault level Ie>> (ANSI 50N or 50G) 

Magnetic trigger selectable

- Low-energy triger,0.02 Ws, without external power supply 
- Low-energy trigger,24 V/0.1 Ws, without external power supply
- Standard trigger coil (with additional -  external capacitor storage PSU) 

Self-test function

Event memory for 20 events

Availabe for download with mini USB cable via software (PC) 


due to transformer power supply Internal battery life > 15 years without transformer current
Device data
Article number2503290_H003
Product designationIKI-35 Transformer Monitor | Protection Relay according to EN 60255 | LCD and USB | 24V release
StandardIEC 60255-1
Dimensions and mounting instructions
Case height x width x depth48 x 96 x 80 mm
Cutout height x width45 x 92 mm
Norm cutout dimensionsDIN 43700
Installation typePanel mounting
Operating conditions
Operating temperature-40°C ... 70°C
Storage temperature-40°C ... 80°C
Protection classIP40, IP54
Rated frequency50 Hz, 60 Hz
Technical Data Protection Functions
Resetsettable 2 h / 4 h / 8 h, autom. after load current restoring, manual
Setting / nominal current setting range10 .. 250 A, 100 .. 400 A
Protection levelsANSI 50, ANSI 50N, ANSI 51, ANSI 51N
Intrinsic time43 ms
Threshold value I>>/Insettable 2 .. 32 or deactivated
Delay time I>>Settable 0 .. 2 s
Threshold value UMZ I>settable 1.1 .. 3
Delay time UMZSettable 0,3 .. 300 s
Protection characteristics IDMTIEC extremely invers, IEC long time invers, IEC normal invers, IEC very invers
Start value I>/Insettable 1,1 .. 3
Displacement factor v I>Settable 0,05 .. 10 s
Threshold value Ie>>settable 0,1 .. 2 or deactivated
Delay time tIe>>Settable 0 .. 2 s
Threshold value UMZ Ie>settable 0,1 .. 2
Delay time UMZ Ie>Settable 0 .. 5 s
Start value Ie>/Insettable 0,1 .. 2
Displacement factor v Ie>Settable 0,05 .. 10 s
Interfaces and communication
Remote signalling2x, settable NO / NC, settable logic: I> + Ie>; I>; Ie>; Trip
Power supply
Power supply24 - 230 V AC/DC +- 10%; Power input < 1 Watt
Battery typeLithium battery