The ANU-1 OCR checker is an indispensable tool for field-testing overcurrent relays (OCRs). This compact, portable device can verify the operational integrity of OCRs by simulating fault conditions. It tests various functionalities, including long and short time-delay, instantaneous trips, ground fault trips and pre-trip alarms. Its user-friendly interface allows for quick and precise adjustments of current settings, ensuring comprehensive relay testing. Ideal for utility and industrial applications, the ANU-1 enhances maintenance efficiency by accurately assessing the performance of protective relays — contributing to the overall safety and reliability of electrical systems.

Features:

• Long- and short-time delay trip measurement capability.
• Instantaneous and ground fault trip measurement.
• Pre-trip alarm functionality.
• OCR measurement without requiring control power.
• Single connector for simplified OCR connection.
• Clear LCD display for function, output phase and trip signal indicators.
• Push-button switches for effortless operation.