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RCD Testers

Showing 8 Items

  1. Socket & See RCD PRO Professional RCD Tester

    Socket & See RCD PRO Professional RCD Tester

    inc VAT £286.80 ex VAT £239.00
    In Stock - Available Next Day
    • A useful tester for AC, ACS and A-type RCDs
    • Ramp testing, auto testing and manual testing at 30mA, 100mA, 300mA or 500mA
    • Measures trip time from 5ms to 1999ms with ±1% accuracy
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  2. Kewtech KT500 Digital RCD Tester

    Kewtech KT500 Digital RCD Tester

    inc VAT £310.80 ex VAT £259.00
    In Stock - Available Next Day
    • Hands free operation, in line with 18th edition regulations
    • Tests type AC, ACS & A RCDs and measures AC Voltage VLN
    • 30mA auto test, ramp test & distribution board polarity test
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  3. Megger RCDT310 RCD Tester Front

    Megger RCDT310 RCD Tester

    inc VAT £402.00 ex VAT £335.00
    In Stock - Available Next Day
    The easy to use Megger RCDT310 tests RCD trip times. Thick rubber armoured case, clear colour coded selectors and a large clear display.
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  4. Megger RCDT320 Automatic RCD Tester

    Megger RCDT320 Automatic RCD Tester

    inc VAT £450.00 ex VAT £375.00
    Typically ships in 10-14 working days
    The Megger RCDT320 tests RCD Trip times, has Automatic remote testing & Ramp tests RCD's.
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  5. Megger RCDT330 Downloadable RCD Tester

    Megger RCDT330 Downloadable RCD Tester

    inc VAT £486.00 ex VAT £405.00
    In Stock - Available Next Day
    The Megger RCDT330 tests RCD Trip times, has automatic remote testing & Ramp tests RCD's. All results are stored & can be downloaded via USB.
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  6. Megger LRCD210 Loop and RCD Tester

    Megger LRCD210 Loop and RCD Tester

    inc VAT £528.00 ex VAT £440.00
    In Stock - Available Next Day
    The Megger LRCD210 Loop & RCD tester: with 3 year warranty & free Calibration Certificate
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  7. Megger LRCD220 Loop and RCD Tester

    Megger LRCD220 Loop and RCD Tester

    inc VAT £682.80 ex VAT £569.00
    Typically ships in 5-7 working days
    The Megger LRCD220 Loop & RCD tester: Phase - Phase & High Current Loop Testing with Dual Operation Voltage (110V & 230V) with Calibration Certificate
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  8. Chauvin Arnoux CA6030 RCD Tester

    Chauvin Arnoux CA6030 RCD Tester

    inc VAT £694.80 ex VAT £579.00
    Typically ships in 5-7 working days
    • Five pre-set milliamp test currents plus one user-adjustable current
    • Automatic voltage and frequency testing on installations
    • Non-trip testing and trip time tests with pulse and ramp mode
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Showing 8 Items

RCD Testers

We stock RCD testers from Megger, Kewtech and Martindale with features including ramp testing, automatic testing and results storage.
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About RCD Testers

We stock RCD testers from Megger, Kewtech and Martindale. This range of handheld testers offers RCD testing in accordance with the latest wiring regulations with features including ramp testing, automatic testing and results storage.

We stock RCD testers from Megger, Kewtech, Socket & See and Chauvin Arnoux. Our range of handheld testers will carry out the required tests in accordance with BS7671. The instruments offer tests including ramp testing, fully automatic testing, and manual testing where required. Some models also store and download test results.

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Residual Current Devices (RCD’s) are more and more frequent in the increasingly safety conscious electrical installation industry. Designed to trip within thousandths of a second under fault currents as small as 5mA, RCD’s are installed to prevent the risk of electrocution and fire in in the event of an electrical fault.


The key component within an RCD is a current transformer, upon which the line and neutral conductors are wound in opposite directions. If no earth fault current is flowing, the magnetomotive force generated by the line and neutral current windings are both equal; there is no resultant flux in the transformer and the detecting winding within the transformer does not generate any current.
When a fault current flows there is a difference between the line and neutral currents which will generate a resultant flux in the transformer, thus inducting a current in the detecting winding, allowing the RCD to operate.


Most RCD’s feature a mechanical trip button which a user is advised to press every quarter of a year. Although this will prove the RCD is working mechanically, a contractor needs to know how quickly the RCD operates under different fault conditions to meet the trip times specified in the BS7671 Wiring Regulations.


We stock a wide range of residual current device testers including Megger, Kewtech, Socket and See and Martindale. Some RCD testers or analysers offer the ability to conduct an automatic RCD test which enables the engineer to perform all six RCD tests at once. Simply leave the tester connected to the circuit under test and reset the RCD after each test in one trip, rather than resetting and testing in sequence.