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Current relays and power limiters

OM-310 Power Limiting Relay

The device allows working with a load of 2.5 – 30 kW with the use of integrated current transformers, and with a load of up to 350 kW with the use of external current transformers, including in networks with an insulated neutral.

OM-310 Power Limiting Relay is used for:

 

 

  • consumer protection against low-quality electric network characteristics;

 

  • complete load rejection when the power consumption exceeds the main threshold for a user-set time;

 

  • partial load rejection when the power consumption exceeds the main threshold for a user-set time;

 

  • measurement and indication of three-phase electric network parameters (active values of phase and line voltages);

 

  • positive-, negative- and zero-phase sequence voltages; active phase current values; active, reactive and full power load consumption, power factor;

 

  • emergency signaling;

 

  • remote load activation and rejection via the RS-232/RS485 interface or external switch.

 

 

 

The device allows working with a load of 2.5 – 30 kW with the use of integrated current transformers, and with a load of up to 350 kW with the use of external current transformers, including in networks with an insulated neutral.

 

 

ОМ-310 offers the consumer the following protection types:

 

 

  • low-quality network voltage (unacceptable power surges, phase breaks, phase sequence disruption, phase/line voltage distortion);

 

  • current exceeding the maximum allowed value on any of the load phases;

 

  • ground leakage currents.

 

 

Automated reclosing can be allowed or forbidden for each type of protection.

 

 

Electric equipment is protected by means of controlling the magnetic starter coil (contactor).

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