Multifunction Tester Comparison: Megger, Kewtech, Metrel vs Fluke - Which to Buy for 18th Regulation Tests and EV Support

Multifunction Tester Comparison for 18th Regulation Compliance and EV Charging Support

When it comes to ensuring the safety and compliance of electrical installations, particularly under the strict requirements of the 18th edition of the Wiring Regulations (BS 7671), selecting the right equipment is crucial. Multifunction testers (MFTs) play an essential role in this process, providing the necessary tests for continuity, insulation, loop impedance, RCD functionality, and more. Moreover, with the rising demand for Electric Vehicle (EV) charging installations, the need for testers that can also handle EV-specific requirements has become more prominent.

The Need for Reliable Testers

Choosing a multifunction tester involves considering several factors, such as feature set, reliability, ease of use, and manufacturer support. With the market offering various options from reputable brands like Megger, Kewtech, Metrel, and Fluke, it's important to understand how each model stacks up against the requirements of the 18th regulation tests and the specific needs for EV charging system verification.

Comparison of Features Across Popular Models

Below is a detailed comparison of the features offered by various multifunction testers from the leading brands, highlighting their capabilities in both general electrical testing and specific tests related to EV charging systems:

Feature	MFT1711	MFT1721	MFT1731/5	MFT1741	MFT1741+	MFT-X1
Insulation Ranges
100 V		●	●	●	●	●
250 V, 500 V	●	●	●	●	●	●
1000 V	●	●	●	●	●	●
Test voltage display	●	●	●	●	●	●
Adjustable buzzer threshold		●	●	●	●	●
Continuity and Resistance Ranges
200 mA test	●	●	●	●	●	●
15 mA test		●	●	●	●	●
Adjustable buzzer threshold	●	●	●	●	●	●
Loop Testing
2 and 3 wire non-tripping L-PE 50 V ~ 280 V	●	●	●	●	●	●
2 wire Hi current L-N 50 V ~ 280 V	●	●	●	●	●	●
2 wire phase to phase L-L 50 V ~ 500 V		●	●	●	●	●
PSCC and PFC (20 kA max.)	●	●	●	●	●	●
Max. Zs display	●	●	●	●	●	●
R1 + R2 value		●	●	●	●	●
Touch voltage display on faulty earth	●	●	●	●	●	●
Earth Electrode Test
2 and 3 pole **			●	●	●	●
3 pole ART and Stakeless method **			●	●	●	●
RCD Tests
1/2, 1, 5 x I and ramp RCD test	●	●	●	●	●	●
Auto RCD test	●	●	●	●	●	●
Type AC, A and S RCDs	●	●	●	●	●	●
Type B (pure DC) RCDs		●	●	●	●	●
Programmable RCD	●	●	●	●	●	●
3-phase RCD ( earth)		●	●	●	●	●
30, 100, 300 and 500 mA RCD	●	●	●	●	●	●
10 mA and 1000 mA RCD	10mA	●	●	●	●	●
6mA DC RCD Test (for EVSE)					●	●
Other Features
Supply measurement	●	●	●	●	●	●
True RMS	●	●	●	●	●	●
Leakage current measurement **		●	●	●	●	●
Phase rotation		●	●	●	●	●
Calibration certificate	●	●	●	●	●	●
Rechargeable batteries (charger included)			●	●	●	●
SP5 Switched probe included		●	●	●	●	●
Warranty upgradeable to 3 years FREE	●	●	●	●	●	●
On board memory with Bluetooth® download			●	●	●	●
CAT IV 300 V / CAT III 600 V	●	●	●	●	●	●
Hard moulded case	●	●	●	●	●	●
Soft pouch with additional storage			●	●	●	●
Confidence Meter™ noise reduction				●	●	●
New hardware loop test platform				●	●	●
High resolution color TFT display						●
User-upgradeable operating system						●
Full-color graphical assistance						●
Customizable RCD test sequences						●
Enhanced connectivity with Bluetooth® low energy						●
Cloud synchronization with CertSuite						●
EV charge point testing capability					●	●
Optimized for use with specific apps and services						●
Models which are still available to order	●	●				●
Ebay price	£499.99	£685.00	N/A	N/A	£1,000.00	£1,200.00

In-depth Feature Comparison

Insulation Test Ranges

The insulation resistance test is fundamental for any electrical installation to ensure the safety and integrity of wiring. Most models across all brands offer standard 250V, 500V, and 1000V test ranges, which are adequate for most domestic and commercial installations. The Megger series offers a wide range of models with varying capabilities, with the higher-end models supporting more features like adjustable test voltage displays and customizable alarm thresholds which can be crucial for more complex systems.

Loop and Earth Testing

Loop testing capabilities are critical for determining the efficiency of the protective measures in place for fault conditions. All models provide robust testing features, with some variations in how these tests can be performed. The higher-end models often feature both 2-wire and 3-wire non-tripping loop tests at low voltages, which are essential for testing without disrupting system operations. Additionally, advanced models like the MFT-X1 and MFT1741+ offer enhanced features such as phase rotation and support for testing at higher currents.

RCD Testing and EV Support

RCD testing ensures that the residual current devices function correctly, which is vital for user safety. The models differ slightly in the types of RCDs they can test, with some capable of testing Type B (DC) RCDs which are essential for installations involving renewable energy systems or EV charging points. Notably, the MFT1741+ and MFT-X1 also support 6mA DC RCD testing, specifically catering to the needs for EV charging system installations.

Advanced Connectivity and Data Management

As testing becomes more integrated with digital workflows, the ability to connect, sync, and manage test data efficiently becomes increasingly important. The newest models from Megger and Metrel feature Bluetooth connectivity and cloud synchronization options, making it easier for engineers to manage their data and even integrate them into broader asset management systems.

Conclusion

Choosing the right multifunction tester depends heavily on your specific testing requirements, including the types of installations you work with and any special features you need, especially concerning EV charging systems. The comprehensive comparison above provides a solid foundation for selecting a tester that meets the rigorous standards of the 18th Edition and supports modern electrical vehicle infrastructures.

Kewtech Multifunction Tester Comparison

Kewtech offers a range of multifunction testers that are renowned for their reliability and ease of use, making them a favorite among professionals. These testers are equipped with various features that ensure compliance with BS 7671 and are suitable for a variety of testing requirements including low voltage electrical installations and EV charging systems.

Comparison of Kewtech Models

Below is a table showcasing the different features of the Kewtech multifunction testers, highlighting key functionalities like insulation testing, loop testing, and specific EV charging tests:

FEATURES	KT63DL	KT63PLUS	KT65DL	KT66DL
Continuity at 200mA with auto null function for test leads	●	●	●	●
Continuity 15mA test current option				●
Insulation 250V, 500V & 1000V	●	●	●	●
Insulation 100V				●
Polarisation and dielectric absorption index				●
Digital insulation resistance bargraph				●
PAT testing with optional PAT ADAPTOR 1	●	●	●	●
PAT results memory, auto ID advance and download with software			●	●
Continuous Live warning	●	●	●	●
55V loop test (tests 110V CTE on-site systems)		●	●	●
High voltage LED light			●
Low current ATT non RCD trip loop test	●	●	●	●
2 Wire low current ATT non RCD trip loop test				●
EVSE charging point loop tests				●
High current loop test	●	●	●	●
PSC / PFC test	●	●	●	●
50kA PFC range using 25A test current				●
Loop test noise level indicator				●
0.001 Ω resolution high current loop test		●	●	(25A test)
Selectable Max Zs table			●	●
Selectable loop pulse function to overcome contact resistance				●
'Hands free' testing	●	●	●	●
Backlight	●	●	●	●
RCD type AC, ACS, A & AS	●	●	●	●
Single, auto & ramp tests	●	●	●	●
RCD type F, B, BS & EV				●
EVSE 6mA RDCD ramp, auto & single test				●
Uc test				●
Variable RCD test				●
RCD auto test all results on one screen		●	●	●
Test probe with remote test button		●	●	●
Advanced memory software included			●	●
Phase rotation		●	●	●
Earth resistance with optional ACCES KIT			●	●
Large colour matrix display		●		●
Carry case with extra space for testing accessories	Soft	Soft	Soft	Soft
IP40 / 54	54	54	40	40
Wiring & lead polarity check	●	●	●	●
Mains polarity check	●	●
Touch pad for earth potential limits 25 V or 50 V			●	●
Volts measurement	●	●	●	●
Separate volts function with L-N, L-PE & N-PE sim display				●
Magnetic feet	●
Ebay price	£590.00	£792.00	£825.00	£1,000.00

Reference: Kewtech Multifunction Testers

Kewtech Multifunction Testers: Features and Benefits

The Kewtech range notably includes features geared towards comprehensive testing capabilities, including:

• Insulation Testing: Up to 1000V insulation testing with options for lower voltages, essential for a variety of installations.
• Loop Testing: Includes high current and non-trip options, which are crucial for testing without tripping circuit breakers, especially useful in sensitive environments.
• RCD Testing: Extensive RCD testing options, including the capability to test newly required EV-specific RCDs, making these testers particularly valuable for technicians working in modern installations.
• Connectivity and Ease of Use: Features such as advanced memory, phase rotation, and large color displays enhance user experience and data management capabilities, facilitating easier and more efficient field operations.

These Kewtech models stand out in the market for their robust testing features, compliance with current electrical standards, and provisions for future-proof testing in sectors like electric vehicle infrastructure.

Stay tuned as we continue to explore more brands and their offerings in the multifunction tester market, providing you with detailed insights to choose the best tool for your electrical testing needs.

Metrel Multifunction Tester Comparison

Metrel is another well-regarded brand in the field of electrical testing, known for its innovative and comprehensive range of multifunction testers. These devices are designed to meet a wide spectrum of testing requirements, including advanced features for the latest electrical safety standards and efficiency in testing protocols.

Comparison of Metrel Models

The following table illustrates the diverse functionalities available in various Metrel multifunction testers, highlighting their adaptability for different testing environments and requirements:

Measurement Function	MI 1662	MI 1663	MI 1664 FC
Voltage & Frequency	●	●	●
Wiring polarity checker	●	●	●
Insulation Resistance	●	●	●
Insulation safety pretest			●
Continuity & Resistance with auto polarity swap	●	●	●
Continuity & Resistance with 10 mA	●	●	●
Continuity & Resistance, choose input terminals with (F1)		●	●
Zmax memory		●	●
Loop & Line Resistance	●	●	●
Loop & Line Resistance–mΩ resolution			●
Prospective Short-Circuit Current (PSC/Ik)	●	●	●
RCD tripping time	●	●	●
RCD tripping level (ramp test)	●	●	●
RCD variable current	●	●	●
Automatic RCD test sequence	●	●	●
Test pulse current sensitive RCDs (Type A)	●	●	●
Test smooth dc sensitive RCDs (Type B)		●	●
Earth Resistance		●	●
Phase Rotation Indicator	●	●	●
Auto test sequence			●
Self-test	●	●	●
Illuminated Display	●	●	●
Fluke Connect™ Wireless System			●
Memory and Computer Interface	●	●	●
Fluke DMS Software (optional accessory)	●	●	●
Fluke FVF Software (optional accessory)	●	●	●
Fluke Connect™ smartphone app			●
Hard case	●	●	●
Remote control probe	●	●	●
Zero Adapter	●	●	●

Reference: Metrel Multifunction Testers

Metrel Multifunction Testers: Advanced Features and Compliance

Metrel testers are packed with features that ensure compliance with the latest electrical standards, including BS 7671 and other international regulations:

• Comprehensive Testing Range: Metrel testers offer a broad range of voltage, continuity, and resistance tests, along with advanced RCD testing capabilities. This includes the ability to handle Type B RCDs which are essential for installations involving renewable energy sources and electric vehicle supply equipment.
• High-Resolution Testing Capabilities: Models like the MI 1664 FC offer high-resolution loop and line resistance measurements, crucial for precise fault detection and ensuring system safety.
• Wireless Connectivity and Integration: The MI 1664 FC features Fluke Connect™ Wireless System compatibility, providing seamless integration with smart devices for real-time data sharing and analysis, enhancing the efficiency of testing processes and documentation.
• User-Friendly Interfaces and Durability: Metrel testers are designed with user-friendly interfaces, illuminated displays for working in low-light conditions, and robust cases suitable for tough field conditions.

Metrel's multifunction testers stand out for their precision, compliance, and ease of use, making them excellent choices for professionals looking to ensure thorough and compliant electrical safety assessments.

Fluke Multifunction Tester Comparison

Fluke is synonymous with quality and reliability in the testing and measurement industry. Their multifunction testers are engineered to deliver top-tier performance for comprehensive electrical safety tests, aligning with global standards and addressing the needs of modern electrical installations.

Comparison of Fluke Models

The following table displays the distinct features of various Fluke multifunction testers, highlighting their applications for rigorous testing environments:

Measurement Function	1662	1663	1664 FC
Voltage & Frequency	●	●	●
Wiring polarity checker	●	●	●
Insulation Resistance	●	●	●
Insulation safety pretest			●
Continuity & Resistance with auto polarity swap	●	●	●
Continuity & Resistance with 10 mA	●	●	●
Continuity & Resistance, choose input terminals with (F1)		●	●
Zmax memory		●	●
Loop & Line Resistance	●	●	●
Loop & Line Resistance–mΩ resolution			●
Prospective Short-Circuit Current (PSC/Ik)	●	●	●
RCD tripping time	●	●	●
RCD tripping level (ramp test)	●	●	●
RCD variable current	●	●	●
Automatic RCD test sequence	●	●	●
Test pulse current sensitive RCDs (Type A)	●	●	●
Test smooth dc sensitive RCDs (Type B)		●	●
Earth Resistance		●	●
Phase Rotation Indicator	●	●	●
Auto test sequence			●
Self-test	●	●	●
Illuminated Display	●	●	●
Fluke Connect™ Wireless System			●
Memory and Computer Interface	●	●	●
Fluke DMS Software (optional accessory)	●	●	●
Fluke FVF Software (optional accessory)	●	●	●
Fluke Connect™ smartphone app			●
Hard case	●	●	●
Remote control probe	●	●	●
Zero Adapter	●	●	●

Reference: Fluke Multifunction Testers

Fluke Multifunction Testers: Precision and Integration

Fluke multifunction testers are designed with the professional in mind, providing:

• Extensive Testing Capabilities: From basic voltage and frequency checks to comprehensive insulation resistance and loop testing, Fluke's range covers all fundamental and advanced needs.
• Advanced RCD Testing: Including Type B RCDs, which are crucial for systems involving renewable energy and EV charging stations, ensuring compliance with latest safety standards.
• Integration and Connectivity: The Fluke 1664 FC, for instance, supports Fluke Connect™, allowing users to connect devices and share data wirelessly, enhancing the flexibility and efficiency of field operations.
• User-Centric Design: Fluke testers are built to endure tough conditions with features like illuminated displays and robust casings, alongside interfaces designed for quick, intuitive operation.

Fluke's reputation for durability and precision makes their multifunction testers a preferred choice among electrical professionals who require reliability and comprehensive functionality in their testing instruments.

Comprehensive Comparison of Multifunction Testers from Leading Brands

When choosing the right multifunction tester, it's crucial to balance features, reliability, and cost. Below is a comparison of four major brands: Megger, Kewtech, Metrel, and Fluke.

Feature Set and Capabilities

• Megger: Known for a wide range of features across various models, including high-end options like the MFT1741+ which offers advanced testing capabilities suitable for complex systems. Notable for its robustness and extensive support for RCD types including Type B (pure DC).
• Kewtech: Offers excellent value with a balance of essential features and advanced functionalities like the KT66DL, which includes high current loop testing and support for EVSE charging point tests, making it a versatile choice for modern installations.
• Metrel: A solid budget option with models like the 1664 FC that include comprehensive safety pretests and wireless connectivity, providing a budget-friendly choice without compromising on necessary features.
• Fluke: Although offering high precision and reliability, the high cost might be a barrier for some, particularly when similar functionalities are available at lower prices from other brands.

Pricing and Value for Money

• Megger: Generally positioned at a higher price point, reflecting its market perception as a premium brand. Suitable for those who need top-of-the-line equipment and can justify the investment based on usage and requirements.
• Kewtech: Emerges as the best value for money, providing a robust set of features at more competitive prices. Ideal for professionals looking for reliability and functionality without a significant financial outlay.
• Metrel: The most budget-friendly option among the listed brands, offering a no-frills approach to electrical testing. It’s a good choice for those who need essential features without the additional cost.
• Fluke: Prices are typically higher, and while the brand is synonymous with quality and durability, the cost might not align with the budget constraints of all users, making it less attractive compared to other options offering similar capabilities.

Conclusion

For those in need of a multifunction tester, Kewtech stands out as the best value for money, offering a strong feature set at a reasonable price. It's particularly suitable for professionals who require a reliable tool for a range of testing scenarios, including modern installations like EV charging.

Metrel offers a good entry point for those on a tighter budget but still covers all the basic requirements for comprehensive electrical testing.

Megger, while more expensive, could be justified for advanced users needing specific high-end features that are unique to their testing scenarios.

Fluke, though offering excellent quality and reliability, may not represent the best value for money given the comparative analysis with other brands offering similar features at lower price points.

This comparative insight should guide users in selecting a multifunction tester that not only fits their testing requirements but also aligns with their budget constraints.