Kyoto, Japan -- OMRON Corporation (TSE: 6645, ADR: OMRNY) announces the release on July 1, 2013 of the following monitoring relays.

• New Monitoring relay K8AK / K8DS series

The K8AK / K8DS series power supply monitoring relays detect overcurrent/overvoltage, undercurrent/undervoltage, phase-loss*1, phase-sequence*2, and voltage asymmetry*3.

More expansion of business overseas in the manufacturing industry centering on emerging countries and stronger needs for factory automation in emerging markets demand responses to the following problems caused by the power supply situation of devices and machines.

1. Malfunction of devices and machines caused by voltage fluctuation due to unstable power conditions.
2. Motor error rotation caused by incorrect wiring of power cable or motor burnout caused by loosened wiring (disconnection) of power supply terminal part, which comes from variation of proficiency for maintenance and check.
3. Heating or troubles generated by inverter noise from devices and machines when noise filter is not equipped with the inverters.

The newly released monitoring relays K8AK / K8DS series enhanced resistance to inverter noise compared to our previous models. They suppress heating from the monitoring relays themselves generated by inverter noise and monitor power supply troubles even if the noise filter is not installed in the device or machine. In particular, to prevent troubles including malfunction or motor burnout coming from power supply error, the K8AK/K8DS series detect power supply error (voltage or current), phase-loss, and phase-sequence. This detection contributes to shortening recovery work and protecting the device and machine quickly. The K8AK/K8DS series bodies are slim 17.5mm/22.5mm wide and DIN Track mounting type, which conform to the global standard DIN48330. These specifications contribute to downsizing devices and reducing the control panel space.

• *1. Phase-loss: The state in which voltage is not supplied to one or more phases of three-phase power lines because of disconnection of power line, loosened terminal screw, or contact failure of switches.
• *2. Phase-sequence: The state in which phase sequence of three-phase power line is not positive. For example, a motor rotates backward when the phase sequence is reversed.
• *3: Voltage asymmetry: The state in which power supply voltage of each three-phase power line is not equal because of phase-loss or other reasons.