Kyoritsu · MODEL 5406A
Kyoritsu MODEL 5406A Digital RCD Tester
Digital RCD tester for 10–500 mA devices: ×½, ×1, ×5, DC and auto-ramp tests, trip time in ms, wiring check…
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Kyoritsu RCD Testers
A residual current device (RCD, also called RCCB or ELCB) disconnects a circuit when current leaks to earth, protecting people from electric shock. An RCD tester checks that it trips at the right current and fast enough.
Kyoritsu RCD testers plug into a socket or connect at the board, inject a controlled test current and display the trip time in milliseconds.
What an RCD test checks
×½ test. Half the rated residual current is applied; the RCD should not trip. This checks that it will not nuisance-trip.
×1 test. The rated residual current (for example 30 mA) is applied; the RCD must trip within the time set by its standard.
×5 test. Five times the rated current is applied to check the fast trip time relied on for protection against direct contact.
Ramp test. The current rises in steps until the RCD trips, showing the actual trip current.
RCD types. Type AC devices respond to sinusoidal residual current; type A also respond to pulsating DC. Selective (S) types have a deliberate delay. Choose a tester that supports the devices you test; the MODEL 5406A covers standard, selective, AC and A types.
Related applications
- Electrical Safety TestingVerification tests on installations: continuity, insulation, earth and RCD.
- RCD TestingChecking that RCCBs and ELCBs trip at the right current and time.
Questions about rcd testers
How often should RCDs be tested?
Press the RCD's own test button regularly as the manufacturer recommends, and carry out instrument tests of trip time at the intervals required for the installation type.
Why test at 0° and 180°?
An RCD can trip at slightly different times depending on the point on the waveform where the fault starts. Testing at both phase angles and recording the longer time gives a more reliable result.
Related categories
- Digital Multimeters
- Clamp Meters
- Power Clamp Meters
- Insulation Testers
- Earth Testers
- Phase Indicators
- Voltage Testers & Detectors
Looking for another brand of rcd tester? Our multi-brand site IndiaMeters covers other manufacturers.