The Digital ELCB/RCCD Tester Model 1811 by Metravi is a specialized instrument designed for testing Residual Current Devices (RCDs) and Earth Leakage Circuit Breakers (ELCBs). Here are its detailed specifications and features:

Key Specifications:

• Model: 1811
• Brand: Metravi
• Trip Current Ratings: 10mA, 20mA, 30mA, 100mA, 300mA, 500mA.
• Operating Voltage: Suitable for 230V/50Hz single-phase line, with an operational range of 195V to 253V.
• Frequency Range: 45Hz to 65Hz.
• Trip Time Readout: 2000ms, 1000ms, 300ms, and 40ms.
• Voltage Measurement: 30V to 600V.
• Resolution: 1Hz, 1V.
• Accuracy: ±3%.
• Certifications: Conforms to IEC 61010-1 CAT III 600V, IEC 61010-2-31, IEC 61557-1,6, Pollution Degree 2.

Features:

• Micro-Processor Controlled: Ensures high accuracy, reliability, and stability during testing.
• Phase Angle Selection: Allows testing at positive 0° or negative 180° phase angles.
• Auto Ramp Test: Simultaneously tests trip current and trip time.
• Wiring Check: Three-LED indication for quick verification. Green LEDs (P-E and P-N) indicate correct wiring; a red LED indicates incorrect wiring (reverse P-N or poor grounding).
• Over-Load Indication: Displays "OL mS" if the trip time exceeds the maximum test time.
• Data Hold Function: Automatically holds test results for easy reading.
• Alarm: Issues an alarm when contact voltage exceeds the selected limit during the RCD test.
• Auto Power-Off: Conserves battery life by powering off after inactivity.
• Power-Off Warning: Buzzer alerts after 3 minutes of operation.

Power & Safety:

• Power Source: Battery operated with six AA alkaline batteries.
• Fused Protection: Ensures safe operation.
• Insulation: Double or reinforced insulation for enhanced safety.
• Earthing Systems: Measures L-N and L-P-E voltages.

Additional Information:

• Display: Backlit LCD for clear reading.
• Color: Blue.
• Warranty: One year against manufacturing defects.

The Metravi 1811 is ideal for electrical professionals who require accurate and reliable testing of RCDs and ELCBs. It combines advanced features like auto ramp testing, precise wiring checks, and robust safety standards, making it a valuable tool for electrical maintenance and troubleshooting.