Safety first for RCD testers
A
Megger product story
Edited by the Engineeringtalk editorial team
Aug 30, 2004
Even if they are inadvertently connected to a live three-phase supply, RCD testers in Megger's new RCDT300 range remain undamaged, and present no safety hazard to the user.
Even if they are inadvertently connected to a live three-phase supply, RCD testers in Megger's new RCDT300 range remain undamaged, and present no safety hazard to the user.
Introduced after extensive customer research into the requirements of electrical contractors, these innovative instruments combine rugged construction with straightforward operation, and they are offered at very competitive prices.
Available in three models, ensuring that all users can choose a model which exactly meets their needs, RCDT300 RCD testers feature a compact ergonomic design, making them easy to handle and use, and a tough impact-resistant body with a rubber overmoulding for additional protection, plus a built-in display cover.
All models in the range are water and dust resistant, with an IP54 ingress protection rating.
The low-cost entry-level RCDT3I0 model is suitable for use on supplies between 100 and 280V, and offers 0.5I, I and 5I tests, with provision for tests starting at 00/1 800 of the supply waveform, as well as for DC tests.
It also has facilities for testing standard and selective RCDs, and covers current ranges from 30 to 500mA.
When connected to a live supply, it defaults to voltmeter mode.
The mid-range RCDT320 covers a wider supply voltage range of 50 to 290V, allowing use with centre-tapped 110V supplies.
It incorporates ramp testing for RCD tripping current measurement, and the unique Megger auto sequence test feature, which saves time by allowing the tester to conduct all the RCD tests, and to store the results while the operator stands by the RCD, resetting it as appropriate.
The operating current range of the RCDT320 is extended to cover 10 to 1000mA devices, and the ability to measure AC supply voltage and frequency is added.
The large liquid crystal display for test results is backlit in this model, making it easier to use in locations with low ambient light levels.
At the top of Megger's new range of RCD testers is the RCDT330, which offers all of the features of the RCDT320, plus facilities for testing of programmable RCDs.
This model also has an internal memory capable of storing up to 1000 test results for later downloading via its integral USB port.
All models in the range comply fully with the requirements of IEC61010-1 for Category III 300V applications, and are supplied complete with appropriate test leads and a calibration certificate.
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