Kyoritsu 5410 RCD Tester

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.