LPRT/2 Three Phase Under Voltage Monitoring Relay

• L-Series Dimensions (PDF)
• LPRT/2 Connection Diagram (PDF)
• LPRT/2 Function Diagram (PDF)

• L-Series UL Certification (PDF)
• Declaration of Conformity - L-Series 3-Phase - LVD (PDF)
• Declaration of Conformity - L-Series 3-Phase DPDT - EMC (PDF)
• REACH Declaration (PDF)
• RoHS Certificate of Compliance (PDF)
• Certificate/Declaration of Origin (PDF)

Typical applications include:

• Motor control centres
• Water-treatment installations
• Lift and elevator control panels
• OEM machine building and control panels

Key benefits:

• Helps reduce low-voltage operation — Under-voltage monitoring releases the output relay when the monitored supply falls below the operating threshold, allowing equipment to be inhibited.
• Helps prevent incorrect motor rotation — The relay requires correct phase sequence before energising, allowing a motor contactor to be inhibited when the incoming phases are reversed.
• Responds to phase and neutral faults — Phase-loss detection and neutral-loss detection in the supported four-wire arrangement can release the control permissive when the incoming supply is incomplete.
• Helps avoid unnecessary voltage-fault trips — An adjustable fault delay allows brief voltage deviations to be tolerated before the relay changes state, subject to the documented immediate-trip conditions.