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
- Item Code: OM-110
- Port of Dispatch: New Delhi, India
Purpose of device
Control and distribution equipment.
Rated power supply voltage, V
Rated voltage frequency, Hz
Harmonical configuration (nonsinusoidality) of power supply voltage
Measurement range of power, , kW (kVA)
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
Adjustable time range for autoreclosing time delay – ton, sec
0– 900, ∞
Adjustable time range for tripping time delay – toff, sec
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
Nominal voltage of insulation, V
Rated impulse withstand voltage, kV
Power consumption (when load is disconnected), kW
Commutation lifetime for the output contacts:
– under the load of 8А, not less than
– under the load of 1A, not less than
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.