Megger RCDT330 RCD Tester


Megger approved distributor and service centre.

The RCDT330 offers the facility to save test results to internal memory. Over 1000 result can be saved on site, and downloaded to a computer when convenient.

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Usually Stock or Short Lead Time

£ 438.70 rrp £ 535.00

save 18%

(£ 526.44 inc VAT.)

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The Megger RCDT330 covers a wider supply voltage range of 50V to 290V than the RCDT310, allowing use with centre-tapped 110V supplies. It incorporates ramp testing 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 RCDT330 covers 10mA to 1,000mA devices, and the ability to measure AC supply voltage and frequency. 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. Data is stored in non-volatile memory, being retained when the instrument is switched off or batteries are exhausted.


Tests standard, DC and selective RCDs.
Ramp testing.
Auto (Remote) testing.
3 Phase safe.
Enables testing on 110 V centre tapped supplies.
Tough rubber armoured case with built-in cover.
Weatherproof to IP54.

Megger RCDT330 Specifications:

  • Voltage measurement Range (AC): 0 V - 300 V 25 Hz to 450 Hz.
  • Test current accuracy: No Trip Test: (1/2I) –8% to –2%, Trip - (I, 5I) +2% to +8%.
  • Programmable RCD: 10 mA to 1000 mA.
  • Frequency measurement range: 25 Hz to 450 Hz.
  • Test result storage: 1000 results.
  • Operating range: -5 °C to +40 °C.
  • Power: 8 x 1.5 V cells IEC LR6 type (AA alkaline).
  • Rechargeable: 8 x 1.2 V NiCd or NiMH cells may be used.
  • Battery Life: 2000 consecutive tests.
  • Environmental protection: Weather proof to IP54.
  • Dimensions: 203 x 148 x 78 mm.
  • Weight: 980gms.
  • Megger RCDT330 warranty: 3 years.


Includes: RCDT330 RCD tester, 2 wire test lead with prods with clips, 8 x AA (LR6) batteries (fitted in instrument), Warranty card, Calibration certificate, CD containing user manual, Safety instructions, USB download lead, Download manager CD, Printed quick start guide, Mains plug test lead.

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Megger RCDT330 RCD Tester