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Megger RCDT330 RCD Tester

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£392.40 £327.00
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Megger's most advanced RCD tester, the RCDT330 improves upon the functionality of the RCDT320.

The RCDT330 is a downloadable RCD tester with built-in memory. This means that testing results can be stored directly on the instrument, viewed back as needed or sent directly to a PC for further analysis using Megger's software (sold separately).

Suitable for use with 30, 100, 300 and 500mA RCDs, 10mA/1A RCDs, programmable RCDs plus DC and selective breakers, the RCDT330 can perform 1/2I, I and 5I tests, an RCD trip current ramp test, auto sequence test and also includes a frequency measurement function.

This tester is supplied in a tough, rubber-armoured case with protective cover for use in demanding conditions.

Megger RCDT330 RCD Tester Key Features

  • 1/2I, I and 5I RCD trip time testing
  • Selective breaker and DC breaker compatible
  • Compatible with 30, 100, 300 and 500mA, 10mA/1A and programmable RCDs
  • Performs ramping RCD trip current test
  • Auto sequence testing
  • 0 and 180° polarity selection
  • Touch voltage display inhibit (selectable)
  • Max/touch voltage at 25V or 50V
  • Frequency measurement function
  • 3 phase safe
  • Large size clear display with backlight
  • Battery status indication
  • Auto power down
  • Fuse blown indicator
  • IP54 weatherproof
  • Built-in memory with download

What's Included?

  • Megger RCDT330 RCD Tester
  • Mains Plug Test Lead
  • 2-Wire Test Lead with Prods and Clips
Accessories related to this product:
Part CodeRCDT330-EN-BS

Megger RCDT300 Series Technical Specifications

RCD Test Ranges (to EN61557-6)  
Supply Voltage RCDT310: 100V to 280V (45Hz to 65Hz)
RCDT320: 50V to 280V (45Hz to 65Hz)
RCDT330: 50V to 280V (45Hz to 65Hz)
Minimum voltage 71V for 300mA RCDs, 100V for 500mA RCDs and 205V for 1000mA RCDs
Test Current Accuracy  
No Trip Test (1/2I): -8 to -2%
Trip Test (I, 5I): +2% to +8%
Trip Time ±1% ± 1ms
Voltage Measurement  
AC Range 0 to 300V (25 to 450Hz)
Accuracy ±2% ± 2 digits
Frequency Measurements (RCDT320/330 Only)  
Range 25 to 450Hz
Accuracy 25 to 199.9Hz ± 0.1Hz
200Hz to 450Hz ± 1Hz
Fault (Touch) Voltage  
Displayed Range 0 to 50V
Error +5%/+15% ± 0.5V
Programmable RCD Step Increments  
10mA to 50mA 1mA steps
50mA to 500mA 5mA steps
500mA to 1000mA 10mA steps
Test Result Storage (1000 Results) - RCDT330 Only  
Job Number 256 locations
Distribution Board Number 99 locations
Circuits 99 locations
Phases P1, P2, P3
Temperature and Humidity  
Operating Range -5 to 40°C
Operating Humidity 93% RH at +40°C max
Storage Range -25 to 70°C
Maximum Altitude 2000m
Environmental Protection IP54
Rating IEC 61010-1 CAT III 300V phase to earth
Power Supply  
Batteries 8 x 1.5V cells IEC LR6 type (AA alkaline)
Rechargeable 8 x 1.2V NiCd or NiMH cells
Battery Life 2000 consecutive tests
General Specs  
Weight 980g
Dimensions 203 x 148 x 78mm
E.M.C In accordance with IEC61326-1
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