Multifunction tester eases RCD checks
A
Megger product story
Edited by the Engineeringtalk editorial team
Sep 8, 2006
Automatic RCD testing is a key feature of Megger's new MFT1552 multifunction tester.
Automatic RCD testing, which can dramatically reduce the time required to test electrical installations by allowing the instrument to be simply plugged into an appropriate socket, is a key feature of Megger's new MFT1552 multifunction tester.
The versatile instrument is the latest addition to the UK's biggest selling family of multifunction testers, the MFT1500 series.
The new MFT1552 is also supplied, as standard, with a full calibration certificate, eliminating the expense and inconvenience of having to purchase this essential item separately.
When testing RCDs, users of the MFT1552 simply plug it into the socket and initiate the test sequence.
They then stand next to the RCD, and reset it each time it trips as the testing proceeds.
Without further user intervention, the instrument carries out all five of the tests prescribed by the 16th Edition of the IEE Wiring Regulations, and stores the results.
The stored results can be displayed on the MFT1552 display simply by repeatedly pressing the "lock" button.
As RCDs are often located some distance from the sockets they supply, large time savings are achieved, as users no longer have to continually return to the instrument, after resetting the RCD, to initiate each separate stage of the test sequence.
Like all of the instruments in the MFT1500 series, the new MFT1552 testers feature an ergonomic design that was developed in close consultation with electrical contractors.
The instruments are also easy to operate, allowing tests to be performed rapidly, with minimal risk of mistakes.
MFT1500-series testers provide all of the testing facilities needed by electrical contractors in a single, compact, and very robust instrument.
To protect users, even when they are working under difficult conditions, the testers incorporate an extensive range of safety features.
These include live circuit warning, auto-discharge after insulation tests, and colour-coded controls which reduce the risk of operator error.
In addition to automatic RCD testing, the new MFT1552 provides facilities which include continuity testing with an adjustable-threshold buzzer; continuity measurement up to 99.9kohm; insulation testing at up 1000V; standard, selective and DC-sensitive RCD testing; RCD ramp testing; nontripping and high-current loop tests; three-phase loop tests; and prospective short-circuit current measurement.
It also has backlighting not only for the display, but also for the selector switches, making the instrument particularly easy to use in poorly lit areas.
Other features include an illuminated switch probe, and a durable fitted carrying case.
Also available are the MFT1502, which provides the same functionality as the MFT1552 but without the automatic RCD test feature, and the entry-level MFT1500, which offers the same testing facilities as the MFT1502, but does not feature backlighting.
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