Power Limiting Relay OM-110

Power Limiting Relay OM-110

Product Details:

Voltage Type AC
Voltage (V) 240 V
Current (Amps) 8A
Number of Poles 2 Pole
Application Power limitting relay, Power Display, Overload Relay

OM-110 power limiting relay is used for continuous control of single phase active or total power. The measured power range is between 0 and 20 kW or between 0 and 20 kVA OM-110 rejects the load in case the user-set maximum allowed load consumption power level is exceeded (with a set rejection time), and subsequently activates the load automatically (with a set activation delay time, or an option to block reclosing).

Potentiometers and DIP-switches installed in the front panel allow the user to set the following values:

  • Maximum allowed power level
  • Relay activation time
  • Automatic reclosing delay time

The load consumption is measured without electrical opening, using an integrated current sensor.

OM-110 relay can be used in the following capacities:

  • Digital wattmeter (active or full power meter)
  • Load consumption limiting relay
  • OM-110 is powered by the voltage measuring circuits

Documentation for this device

Additional Information:

  • Item Code: OM-110
  • Port of Dispatch: New Delhi, India

Technical Specifications:

Purpose of device

Control and distribution equipment.


Rated power supply voltage, V



Typical operation



Rated voltage frequency, Hz

47– 53


Harmonical configuration (nonsinusoidality) of power supply voltage

EN 61000-3-2

(IEC 1000-3-2)


Measurement range of power, , kW (kVA)

0– 20,0


Power measurement accuracy is not less than



Adjustable range for setting maximal power

a) k=1; Wmax, kW( kVA)

Absolute deviation for power measurement not more than, kW (kVA)

b) k=10; Wmax, kW(kVA)

    Absolute deviation for current measurement not more than, kW, kVA


0– 1.075


0– 20



Adjustable time range for autoreclosing time delay - ton, sec

0– 900, ∞


Adjustable time range for tripping time delay – toff, sec

0– 300


Readiness time after turn ON, not more than, sec*



Maximal commutation current on the output terminals, А, not less



Minimum voltage when safe operating (effective value), V **



Maximal voltage when safe operating (effective value), V




Maximum permissible voltage, V, 



Protection degree:         - device

                                      - terminal block




Index protection of electrical shock



Permissible degree of pollution



Overvoltage category



Nominal voltage of insulation, V



Rated impulse withstand voltage, kV



Power consumption (when load is disconnected), kW

to 3.5


Commutation lifetime for the output contacts:

- under the load of 8А, not less than

- under the load of 1A, not less than


100 000

1 000 000


Torque for terminal screws, N*m



Weight, kg, not more than



Dimensions (3 way standard DIN module thickness for DIN rail mounting), mm                                                                              

90 х 52,6 х 69,1


Positioning - free



The wire cross section of connecting terminals is 0.5 - 2.0 mm2



Mounting to standard 35 mm DIN-rail



*In the extreme right position of the knob, turn-off time of 295 s is allowed.

**Reaction time on turn ON is not more than 2 seconds. This time includes device selftesting, turning ON the power load, measuring power consumption and tripping the power load OFF in case fault situation is detected.

*** To increase operational range to low voltage ОМ-110 has function to disable LED digital indicator if voltage level gets lower than 130V. If voltage level is less than 110V then OM-110 automatically opens its output terminals to initial cold state position and thus tunrs OFF.


OM-110 complies with requirements IEC 60947-1, ІEC 60947-6-2, CISPR 11, IEC 61000-4-2.

Harmful substances in concentration more than allowed are absent.


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