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Description
Megger RCDT320 1000mA CAT III 300V Residual Current Device TesterMegger RCDT320 1000mA CAT III 300V Residual Current Device Tester RCDT320 covers a wider supply voltage range of 50 V to 280 V, allowing use with centre tapped 110 V 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.
Megger RCDT320 1000mA CAT III 300V Residual Current Device Tester
RCDT320 covers a wider supply voltage range of 50 V to 280 V, allowing use with centre-tapped 110 V 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.
RCDT320 has an extended operating current range to cover 10 mA to 1,000 mA 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.
Features:
- Tests standard, Type A, selective, and programmable RCDs
- Ramp testing (RCDT320/330)
- Auto (Remote) testing (RCDT320/330)
- 3 Phase safe Enables testing on 110 V centre tapped supplies (RCDT320/330)
- Tough rubber armoured case with built-in cover
- Weatherproof to IP54
- USB interface for downloading test result (RCDT330)
Specifications:
- Supply Voltage: 50V - 280V 45 Hz to 65 Hz
- No Trip Test: (1/2I) –8% to –2%
- Trip Test: (I, 5I) +2% to +8%
- Trip Time: ±1% ±1ms
- Range (AC): 0 V - 300 V 25 Hz to 450 Hz
- Accuracy: ±2% ±2 digits
- Range (AC): 25 Hz to 450 Hz
- Accuracy: 25.0 Hz to 199.9 Hz ±0.1 Hz, 200 Hz to 450 Hz ±1 Hz
- Batteries: 8 x 1,5 V cells IEC LR6 type (AA alkaline)
- Rechargeable: 8 x 1.2 V NiCd or NiMH cells
- Battery Life: 2000 consecutive tests
- E.M.C: In accordance with IEC61326-1
Included Items:
- Megger RCDT320 RCD Tester
- Mains plug test lead (BS1363)
- 2-wire test lead with prods and clips
Data Sheet:
Click Here for Data SheetShipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 2318 reviews
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Product Reviews
★★★★★ 5
Overall good quality and works well for the price point
Size: 54mm Fits Breville Barista/Bambino/Infuser
Works well and does the job needed
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Reviewed in the United States on April 22, 2026
★★★★★ 3
ya get what ya pay for.
Size: 58mm Fits Breville Dual Boiler/Oracle/Gaggia/E61
WDT tool came with bent needles and they are spaced too closely together and are too long to maintain position and bend way too easily and its receiver is a bit short and not weighty enough to be stable with its aspect ratio.
Tamper purports to be a calibrated force tamper while it is a simpler spring-loaded depth-setting tamper
ground distribution tool has a gap that gathers grounds if it is not perfectly closed.
portafilter screen is pretty dang good
the dose funnel chamfer is not at the same height as the rim of the portafilter, making me overfill for estimate
fits my Casabrews Ultimate setup pretty well.
blower bulb is woefully undersized to produce enough force to eject extraneous grounds
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Simple, high-quality solution that makes the transition from grinding to tamping much cleaner!
Color: Black, Size: 58mm, Color: Black, Size: 58mm
I wanted to streamline our espresso workflow. I added the Normcore Magnetic Dosing Funnel V2 to our kit because loading up the portafilter & using the WDT was causing a mess on the counter. This funnel stays put and looks great. is it required? No. Does it work great? Yes!
The Good: What Works Well
Rock-solid attachment: The magnets are impressively strong. It snaps onto the portafilter and doesn't budge.
WDT’s Best Friend: It provides the necessary height to use a WDT tool without making a mess.
Low Profile: Unlike some "tall" funnels, this one is compact enough to fit under many grinder dispensers while still attached to the portafilter.
Premium Finish: The matte black anodized aluminum feels incredibly durable and matches high-end espresso gear perfectly.
The Not-So-Good:
Price Point: It is definitely a premium option. You can find plastic versions for less, but they won't have the same weight or magnetic security.
Pro Tips:
Maintenance: This is anodized metal; do not put it in the dishwasher. Just wipe it with a dry cloth or a dedicated coffee brush.
Magnet Care: Keep the bottom magnets clean. If coffee oils or grounds build up on the magnets, the "snap" won't feel as secure.
Compatibility: Make sure you pick the right size!
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Reviewed in the United States on March 5, 2026
★★★★★ 5
Reduces Mess, Lightweight, Strong Magnets, Fit is OK
Color: Black, Size: 58mm
I've been stubborn about buying a funnel - yet another coffee tool to simplify and optimize, right?
But, it really does reduce the mess when using the WDT tool.
The magnets are quite good, a different brand funnel (with magnets) wouldn't even stick to my portafilter.
The fit is OK - it does slide around on my 58mm basket if I move the funnel. But, that hasn't been an issue because the magnets keep it in place.
The shape is also a bit more tasteful than most of the generic funnels.
Oh, and beware - if you're grinding directly into your portafilter basket (hands-free), the funnel may not fit into your grinder's portafilter-holder. This was the case with my DF54 grinder.
Overall, I'd say it was worth the extra ~$4 USD over generic competitors.
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Reviewed in the United States on May 5, 2026
★★★★★ 5
Great coffee dosing funnel
Color: Silver, Size: 58mm
Normcore products seem to all be high quality. This funnel works very well. Strong magnets hold it securely to the portafilter. My only small complaint is I wish it was just slightly taller on this 58mm version. Just a few millimeters of additional side height would be a great advantage at times when the fine ground coffee decides to come out of the dosing cup in a clump. This current model still makes it much better than with no funnel and does the job quite well.
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Reviewed in the United States on May 28, 2026
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