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• Time-delayed residual current devices trip at nominal residual current
within 130...500ms,for double nominal fault current within 60...200 ms.
Such RCDs are implemented as main residual current protection devices
(please refer to IEC 61008-1) and are marked with the symbol " S ".
• At a measuring circuit without probe, available voltages between PE
and earth can influence the measurement.
• Before using the N-conductor as probe check that all neutral points
have low ohm resistance to the main neutral line. A available voltage of
the N conductor to the earth can influence the measurement.
• The measuring function uses the N-conductor as a probe. Check first
the connection between the neutral point of the distribution system
and earth before the test is started. A possible voltage between the
N-conductor and earth may influence the measurements.
• Leakage currents in current circuits following the RC circuit breaker may
have an influence on the test as well as a voltage between protective
conductor or neutral conductor and ground.
• Attached loads or operating supplies which contains capacitors or
circulating machines can elongate the trip time.
• Measurements may be influenced by potential fields of other grounding
systems.
• Measurements must be carried out in compliance with the respectively
valid standards and regulations.
FEATURES
The Robin-Amprobe RCD Tester allows the testing of trip times of standard
RCDs and selective RCDs using various residual currents:
• This tester is suitable for use under single phase 230 V / 50 Hz.
(Operational Voltage Range: 195 – 253 V, 50Hz)
• It uses a micro-controller with high accuracy, reliability and stability.
• Wiring check: 3-LED Lamp signal to check for correct connection.
Correct wiring: L-E & L-N display two green LEDs ON.
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