Kewtech KT66DL 12-in-1 Digital Multifunction Tester

SKU: KEW/KT66DL
  • Designed for professional electrical testing
  • 12-in-1 testing for circuits and EV systems
  • Tests Type AC, A, F, B and EV RCD circuits
  • On-board memory stores circuit test results
  • Click here to learn more and claim your Kewtech FREE gift! 

£1,149.00 (ex VAT)

£1,378.80 (inc VAT)

Earn 1149 points

In Stock - Express Delivery Available

Why buy from Test4Less?

  • Designed for professional electrical testing
  • 12-in-1 testing for circuits and EV systems
  • Tests Type AC, A, F, B and EV RCD circuits
  • On-board memory stores circuit test results
  • Click here to learn more and claim your Kewtech FREE gift! 
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£1,149.00 (ex VAT)

£1,378.80 (inc VAT)

Earn 1149 points

In Stock - Express Delivery Available

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Kewtech KT66DL 12-in-1 Digital Multifunction Tester

The Kewtech KT66DL 12-in-1 Digital Multifunction Tester is a powerful solution. It is designed for professional electricians and ensures compliance with 18th edition regulations. This tester is ideal for a range of electrical installations, from domestic to industrial setups. It also supports electric vehicle (EV) charge point testing. To do this, it requires pairing with the KEWEVSE adaptor.

Comprehensive Testing Capabilities

The KT66DL offers advanced testing options across voltage, resistance, and current ranges. It features a high current loop test, capable of measuring systems from 55V to 500V, with both 25A and 6A ranges for precise loop impedance measurement. For PSC and PFC testing, it provides dual displays that allow electricians to test fault currents up to 50kA, all while delivering accurate frequency and voltage readings.

This multifunction tester is equipped with full RCD testing coverage, including Type AC, A, F, B, and specific types designed for electric vehicle charging systems. Kewtech’s Anti-Trip Technology (ATT) ensures safe loop testing on RCD circuits, providing a no-trip testing solution even in installations with no neutral, such as 3-phase motor lines.

EV Charge Point Testing

When paired with either the KEWEVSE or KEWEVA adaptor, the KT66DL provides comprehensive testing for electric vehicle charge points, supporting both TN and TT installations. The tester can handle Type B RCDs and RDCDs, ensuring compliance with modern EV infrastructure standards. With phase rotation indicators, CP and PP state adjustment, and oscilloscope output, electricians can confidently test EV charge points with ease.

Durable, versatile, and highly functional, the KT66DL has on-board memory for test result storage and features auto-null and auto-discharge functions for added safety. Whether testing traditional circuits or cutting-edge EV systems, this tester provides electricians with the tools to meet modern electrical testing demands.

Key Features
  • Continuity test at either 200mA or 15mA with adjustable buzzer
  • 100 / 250 / 500 and 1000V insulation test voltages with auto discharge
  • High current loop test range of 2Ω with 0.001Ω resolution
  • Anti-Trip Technology (ATT) for no trip loop L-PE testing
  • 2 wire loop test option for when there is no earth
  • Zs limit: Automatically compares values required by the 18th edition with measured results
  • 55V loop test for testing of 110V CTE circuits
  • RCD: Type AC, A, F, B (general and selective) with auto test and ramp features
  • Earth resistance test 2 and 3 wire options (earth spike kit sold separately)
  • Tests EV and variable RCD’s (with KEWEVSE adaptor)
  • Phase rotation on 3 phase lines with clear indication
  • True RMS voltage measurement from 2 to 600V
  • Advanced on board memory assigns type of test, circuit and DB to test results
  • On screen help ensures correct usage
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Kewtech KT66DL 12-in-1 Digital Multifunction Tester

The Kewtech KT66DL 12-in-1 Digital Multifunction Tester brings a wide range of electrical installation tests into one instrument. It supports loop, RCD, insulation, continuity, voltage, frequency, phase rotation and earth resistance testing. It is designed for professional electricians working on domestic, industrial and electric vehicle installations.

For loop testing, the instrument provides 25A and 6A high-current ranges and a 2Ω high-test-current range with 0.001Ω resolution. Anti-Trip Technology supports no-trip L-PE loop testing on RCD circuits, while a two-wire loop option allows testing where no earth connection is available. Zs Limit automatically compares measured results with values required by BS 7671 18th Edition.

The Kewtech KT66DL 12-in-1 Digital Multifunction Tester also supports Type AC, A, F, B and EV RCD testing, with single, auto, ramp and contact-voltage options. On-board memory can assign the test type, circuit and distribution board to stored results, helping keep records organised. A colour LCD, rotary dial, four function softkeys and on-screen help provide clear access to the instrument’s functions.

 

Key Benefits
  • Combines 12 electrical installation and EV testing functions in one instrument.
  • Anti-Trip Technology supports no-trip loop testing on RCD-protected circuits.
  • Two-wire loop testing provides an option for locations where no earth is available.
  • Zs Limit automatically compares measured results with BS 7671 18th Edition values.
  • On-board memory stores results and assigns the test type, circuit and distribution board.
  • Colour LCD, rotary control, four softkeys and on-screen help support clear operation.
  • Auto-null and auto-discharge functions assist with safe and efficient testing.
  • Phase rotation gives a clear indication of the sequence on three-phase lines.
  • EV and variable RCD testing is supported when used with the KEWEVSE adaptor.

 

Common Applications

Kewtech KT66DL 12-in-1 Digital Multifunction Tester is suitable for a range of testing, maintenance and inspection tasks, including:

  • Electrical installation testing for domestic and industrial systems.
  • Loop impedance testing, including high-current and no-trip loop tests.
  • RCD testing for Type AC, A, F, B and EV devices.
  • Insulation resistance testing at 100V, 250V, 500V and 1000V.
  • Continuity testing using 200mA or 15mA test current.
  • Earth resistance testing using two-wire and three-wire methods.
  • Phase rotation checks on three-phase lines.
  • Voltage and mains frequency measurements.
  • EV charge point testing when paired with a KEWEVSE or KEWEVA adaptor.
  • SPD and portable appliance testing functions.

 

Why Choose This Model?

The KT66DL combines loop, insulation, continuity, RCD, earth, phase rotation and EV-related testing with on-board result memory in one instrument. Its Anti-Trip Technology, automatic Zs comparison and support for Type AC, A, F, B and EV RCDs provide a broad set of functions for electrical installation work.

Product Comparison
Feature KT63DL KT64DL KT65DL KT66DL
200mA continuity test ✓ ✓ ✓ ✓
15mA continuity test option – – – ✓
Insulation 250V, 500V and 1000V ✓ ✓ ✓ ✓
Insulation 100V – – – ✓
Polarisation and dielectric absorption index – – – ✓
Digital insulation resistance bargraph – – – ✓
SPD testing – ✓ – ✓
PAT testing with optional adaptor ✓ ✓ ✓ ✓
PAT memory, Auto ID Advance and download – – ✓ ✓
Continuous live voltage warning ✓ ✓ ✓ ✓
55V loop test for 110V CTE systems – – ✓ ✓
High voltage LED torch – – ✓ –
Low current ATT non-RCD trip loop test ✓ ✓ ✓ ✓
2 wire low current ATT loop test – – – ✓
EVSE charge point loop tests – – – ✓
High current loop test ✓ ✓ ✓ ✓
PSC and PFC testing ✓ ✓ ✓ ✓
50kA PFC range using 25A test – – – ✓
Loop test noise level indicator – – – ✓
0.001Ω resolution high current loop test – ✓ ✓ ✓ (25A test)
Selectable maximum Zs table – – ✓ ✓
Selectable loop pulse function – – – ✓
Hands free testing ✓ ✓ ✓ ✓
Backlight ✓ ✓ ✓ ✓
RCD Type AC, ACS, A and AS ✓ ✓ ✓ ✓
RCD single, auto and ramp tests ✓ ✓ ✓ ✓
RCD Type F, B, BS and EV – – – ✓
EVSE 6mA DC RCD testing – ✓ – ✓
Uc touch voltage test – – – ✓
Variable RCD testing – ✓ – ✓
RCD auto test results on one screen – – ✓ ✓
Test probe with remote test button – – ✓ ✓
Advanced memory software included – – ✓ ✓
Phase rotation – – ✓ ✓
Earth resistance testing with optional kit – – ✓ ✓
Large LCD display ✓ ✓ – –
Dot matrix display – – ✓ ✓
Large colour screen – – – ✓
Protective lid – – ✓ ✓
Carry case Soft Soft Soft Soft
Fused test leads Optional Optional Optional Optional
Help menu – – – ✓
Wiring and lead polarity check ✓ ✓ ✓ ✓
Mains polarity check ✓ ✓ – –
Touch pad earth potential limits ✓ ✓ ✓ (50V/25V) ✓ (50V/25V)
Voltage measurement ✓ ✓ ✓ ✓
Separate L-N, L-PE and N-PE voltage display – – – ✓
Magnetic feet ✓ ✓ – –

 

General Specifications
Specification Details
Product name Kewtech KT66DL 12-in-1 Digital Multifunction Tester
Manufacturer part code KT66DL
Display 3.5-inch colour LCD dot matrix display
Controls Rotary dial with four function softkeys
On-screen help Displays guidance for connecting the instrument according to the selected function
Memory Internal storage for test results; assigns test type, circuit and distribution board to results
Safety standards IEC 61010-1 CAT IV 300V, CAT III 600V; IEC 61557-1, 2, 3, 4, 5, 6, 7 and 10
Power supply 8 x AA (LR6) batteries
Safety functions Auto-null, auto-discharge and Anti-Trip Technology
Zs Limit function Automatically compares measured results with values required by BS 7671 18th Edition

 

Measurement and Accuracy Specifications
Specification Details
Voltage measurement range 2 to 600V AC, True RMS
Frequency measurement 45 to 65Hz
Loop impedance range 0 to 2000Ω, auto-ranging
High-current loop test 25A and 6A ranges
High-current loop range and resolution 2Ω range with 0.001Ω resolution
PFC and PSC measurement Up to 50kA depending on mode
Continuity test current 200mA or 15mA with selectable buzzer
Insulation test voltages 100V, 250V, 500V and 1000V with auto-discharge
Maximum insulation range Up to 2000MΩ
RCD types supported Type AC, A, F, B and EV; general and selective types
RCD test currents 10mA to 1000mA
RCD ramp testing 20–110%; EV 30–100%
RCD test options Single, auto, ramp and contact-voltage options
Phase rotation range 48 to 600V
Earth resistance testing Two-wire and three-wire methods
Loop test options Anti-Trip L-PE testing and two-wire loop testing
SPD function Surge protection device test for SPDs using a varistor
PAT function Insulation and protective conductor resistance testing

 

Mechanical and General Information
Specification Details
Dimensions 136 x 235 x 114mm
Weight 1300g including batteries
Battery type 8 x AA (LR6)
Reading type True RMS voltage measurement
User interface Rotary dial, four function softkeys and colour LCD
Instrument protection Instrument lid and heavy-duty soft carry case

 

Specification Notes
  • EV and variable RCD testing is available when the tester is used with the KEWEVSE adaptor.
  • The two-wire loop option can be used where no earth connection is available, including three-phase motor lines and lighting switch points.
  • The 55V loop test is intended for testing 110V CTE circuits.

 

What’s Included
  • Kewtech KT66DL multifunction tester
  • ACC064SP G7 Test probe
  • ACC065 G7 Test lead set
  • KAMP12 mains lead
  • Test lead pouch
  • Software
  • USB cable
  • Batteries
  • Instruction manual
  • Calibration certificate

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