Best Megger RCDT320 RCDT300 series Residual current device testers Manufacturer, Product

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Best Megger RCDT320 RCDT300 series Residual current device testers Manufacturer, Product

The RCDT300 series residual current device tester is an innovative instrument that combines rugged construction with intuitive operation. Even if accidentally connected to a live three-phase power source, the Megger RCDT300 series will remain undamaged and pose no safety hazard.

RCDT320: Covers a wider mains voltage range of 50 V to 280 V and can be used with a center-tapped 110 V power supply. It includes a ramp test (for measuring RCD trip current) and Megger's unique AutoSequence test feature, which allows the operator to perform all RCD tests and store the results while standing by the RCD and resetting it as needed, saving time.

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Product Description

Overview of the RCDT300 Series

The Megger RCDT300 series of residual current testers is an innovative set of instruments that combine rugged construction with intuitive operation. Below is an overview of the RCDT320 and related models in the series:

Safety and Reliability

Even if accidentally connected to a live three-phase power source, the instruments will not be damaged and pose no safety hazard to the user. All models meet IEC 61010-1 requirements for CAT III 300V applications and feature a safety input terminal interlock to prevent unsafe connection of test leads. A safety lockout prevents test operation when the circuit voltage exceeds 300V.

High Protection & Ease of Operation

Housed in a rugged rubber-clad case with a built-in protective cover, the instruments are IP54 rated for dust and water resistance, making them suitable for use in harsh environments. Simple to use, with no hidden features, the range selection is clearly color-coded to minimize errors.

RCDT320 Specific Capabilities

Covers a wider mains voltage range of 50V to 280V, allowing use with a center-tapped 110V power supply. In addition to the features of the RCDT310, it adds 10mA/1A RCD extended test capability and a backlit display for convenient use in low-light environments. It also features a ramp test function that measures and displays the actual RCD trip current, facilitating diagnosis of RCD fault trips. It also supports auto-test, automatically performing 1/2I, 1I, and 5I tests (at 0° and 180°).

Specifications Comparison

Parameter	RCDT310	RCDT320	RCDT330
Test Current Range	30mA - 500mA	10mA - 1000mA	10mA - 1000mA
Voltage Test Range	100V - 280V	50V - 280V	50V - 280V
Frequency Measurement Range	N/A	25Hz - 450Hz	25Hz - 450Hz
Voltage Measurement Accuracy	±2% ± 2 digits	±2% ± 2 digits	±2% ± 2 digits
Frequency Measurement Accuracy	N/A	25.0Hz - 199.9Hz: ±0.1Hz; 200Hz - 450Hz: ±1Hz	25.0Hz - 199.9Hz: ±0.1Hz; 200Hz - 450Hz: ±1Hz
Safety Category	CAT III 300V	CAT III 300V	CAT III 300V
Display Type	LCD	LCD with backlight	LCD with backlight
Battery Type	AA	AA	AA
Battery Life	2000 Tests	2000 Tests	2000 Tests
Dimensions	190mm × 75mm × 140mm	190mm × 75mm × 140mm	190mm × 75mm × 140mm
Weight	980g	980g	980g
Operating Temperature Range	-5°C to +40°C	-5°C to +40°C	-5°C to +40°C
Protection Class	IP54	IP54	IP54
Additional Functions	Standard RCD testing, 1/2I, I and 5I tests at 0° or 180°, automatic switching to voltmeter mode when connected to live power supply	10mA/1A RCD extended test function, ramp test, automatic test (executes 1/2I, I and 5I tests at 0° and 180°), backlight display	Built-in memory for storing over 1000 test results, USB interface for downloading test results

Key Series Features

Megger RCDT320 RCDT300 Series Residual Current Device Testers Features:

Tests standard, DC, selective and programmable RCDs
Ramp testing (RCDT320/330)
Auto (Remote) testing (RCDT320/330)
Three-phase safe
Enables testing on 110 V centre tapped supplies
USB interface for downloading test results (RCDT330)
Tough rubber armoured case with built-in cover
Weatherproof to IP54

Physical Parameters & Delivery Information

Dimensions & Weight

Dimension: 190mm × 140mm × 75mm

Weight: 980g

Battery Configuration

Equipped with 8 AA alkaline batteries (IEC LR6) or 1.2V rechargeable NiCd/NiMH batteries.

Note: Delivery information typically includes delivery times, shipping methods, packaging, etc., which may vary depending on the seller and the location of purchase.

Manuals & Resources

Datasheet Available

Megger RCDT320 RCDT300 series Residual current device testers datasheet.pdf

Download Datasheet

Frequently Asked Questions (FAQ)

1 What is the operational voltage range of the Megger RCDT320?

The Megger RCDT320 operates across a wide mains voltage range of 50V to 280V, which allows it to be used safely with center-tapped 110V power supplies.

2 What environmental protection rating do these RCD testers have?

The RCDT300 series testers are IP54 rated for dust and water resistance and feature a rugged rubber-clad protective case designed to withstand harsh work environments.

3 What safety features are integrated into the Megger RCDT300 series?

All models in the series meet the IEC 61010-1 standard for CAT III 300V applications. They include a safety input terminal interlock to prevent incorrect lead connection and a safety lockout feature that disables the device if the voltage exceeds 300V.

4 Does the RCDT320 support automatic testing?

Yes. The RCDT320 features an auto-test function that automatically executes 1/2I, 1I, and 5I test cycles at both 0° and 180° phase configurations.

5 How does the ramp test function work on the RCDT320 and RCDT330?

The ramp test function increases the test current incrementally, measuring and displaying the exact trip current of the RCD. This aids in diagnosing the precise cause of nuisance or faulty RCD trips.

6 What are the memory storage capabilities of the RCDT330?

The RCDT330 is equipped with built-in memory capable of storing over 1,000 test results, which can then be easily downloaded to a PC via its USB interface.