ANU-1 OCR Checker

The ANU-1 OCR checker is a compact and portable device designed for field-testing overcurrent relays (OCRs). It ensures the operational integrity of these critical protective components by simulating fault conditions. The device tests various functionalities, including long and short time-delay trips, instantaneous trips, ground fault trips, and pre-trip alarms. With its user-friendly interface and precise current adjustment capabilities, the ANU-1 streamlines relay testing while enhancing maintenance efficiency. This tool is crucial for ensuring the safety and reliability of electrical systems in utility, industrial, and renewable energy applications.

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• 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

Measurement Output:

Long time delay trip pickup current and time

Short time delay trip pickup current and time

Instantaneous trip pickup current

MCR trip pickup current

Ground fault trip pickup current and time

N-phase protection trip pickup current

Pre-trip alarm pickup current *2

Instantaneous trip operation

Operation: Via front of tester

Display: Clear LCD for function, output phase, and trip signal indicators

Connection: Single connector for simplified OCR connection

Weight: 1kg

• Enhances electrical safety by ensuring accurate relay performance testing
• Reduces downtime with streamlined testing and fault simulations
• Simplifies maintenance with easy operation and clear feedback display
• Boosts system reliability by verifying overcurrent protection systems

• Utility substations — In utility substations, the ANU-1 OCR checker is vital for ensuring the proper functioning of overcurrent relays, which protect against faults and overloads in the power distribution network. Regular testing with the ANU-1 helps maintain system reliability and prevents power outages.
• Industrial facilities —Industrial facilities rely on the ANU-1 for testing protective relays in their electrical systems. This ensures that machinery and processes are safeguarded against electrical faults, minimising downtime and maintaining operational efficiency.
• Renewable energy plants — At renewable energy sites like solar or wind farms, the ANU-1 plays a crucial role in testing and maintaining overcurrent relays, which are critical for the stable integration of renewable energy into the power grid.
• Electrical maintenance and repair services — The ANU-1 is a go-to tool for electrical maintenance professionals. It is used for on-site testing of overcurrent protection systems in various settings, ensuring these critical components function correctly and safely.