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 An RCD is a protective device used to automatically disconnect the electrical supply when an imbalance is detected between live conductors. In the case of a single-phase circuit, the device monitors the difference in currents between the active and neutral conductors.
In a healthy circuit, where there is no fault current flowing to earth or protective conductor current, the sum of the currents in the line and neutral conductors is zero. If a line-to-earth fault develops, a portion of the line conductor current will, therefore, not return through the neutral conductor.
The RCD monitors this difference, operates and disconnects the circuit when the residual current reaches a preset limit, the “residual operating current”. This is what the Kyoritsu 5410 tests.
Key Features
- Test RCD’s without Neutral connection (2 wire testing)
- Measurement of RCD trip time
Conducting testing of rated residual non-operating currents at
× 1/2 Range, measuring RCD trip time at × 1 and × 5 Ranges. - Measurement of trip out current
Measuring trip out current by varying current automatically. - Remote Test
Enabling a user to hold the Test Leads with his both hands
by locking the Test Button. Measurement will automatically
start when the main voltage is detected. - Voltage Measurement
Carrying out a constant measurement of voltage in the
stand-by mode at each Range. - Auto-detection of Contact voltage
Detecting the voltage to earth of Earth electrodes or
Protective conductors during RCD test – when applying
test currents – at measurement using EARTH in order to
prevent electrical shocks caused by the damaged earth.
Measurement will be ceased at AC50V or more. - Dust- and Water-proof
Dust- and Water-proof construction
(designed to IEC 60529 IP54). - Backlight
Facilitating working at dimly illuminated locations.
