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Kewtech KT66EV Multifunction Tester and EVSE Kit

NEW Engineered with a sophisticated loop test system, including 3 & 2 wire low current test options and a comprehensive RCD testing facility complete with EV charging point test, the KT66DL has i

Important Calibration Information

This instrument comes with a manufacturers calibration certificate.
Please see 'Calibration Options' in the description for more details.

Next Day Delivery (subject to availability)

£1,195.00 excluding VAT £1,434.00 including VAT @ 20%
  • 250, 500 & 1000V Insulation Test
  • FreeDelivery
  • 30DayMoneyBack
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  • Description
  • Features & Specification
  • Resources
  • Delivery (updated)

FREE Gifts


This instrument comes complete with your choice of free gift from the drop-down menu above. Choose from a calibration voucher for next 
year or a 50m R2 wander lead. How about any one of the IET Guidance Notes, or a quality two-pole tester? 
Whatever you choose you can be sure you're getting a fantastic deal at Instrument Sales & Service.

Kewtech KT66DL 
Multifunction Tester and EVSE Kit

Our new KT66DL 12-in-1 multifunction tester is the ultimate tester, bringing you accuracy and performance like never before. Engineered with a pioneering, sophisticated loop testing system, including 3 & 2 wire low current test options and a comprehensive RCD testing facility complete with EV charging point test capacity, the KT66DL has it all.

As important as its illustrious list of features, the KT66DL exhibits all the hallmarks of Kewtech’s quality, reliability and ease of use, so vital to the everyday contractor, all of which can be seen in its extra-large colour screen display.

We also make your life easier with: Large colour dot matrix display giving relevant information simultaneously, for instance all auto-tests on one screen. There are three ways to test, single press of the test button, lockdown test button for continuous testing or by using the test button in the additional test probe. The instrument has a lid for extra protection and comes with Kewtech’s popular G7 test leads. A robust soft carry case with extra room for testing accessories and a printed manual with end of line calibration certificate is included.

*Important Calibration Information:

This instrument comes complete with the manufacturer's calibration certificate. Please be aware that these certificates are generic and may also be time lapsed.
If you would prefer a personalised full traceable calibration certificate applied to the equipment before dispatch, then please select this option from the drop-down menu above, an additional calibration charge will apply.

Also Consider:

  • KT66ET with earth test kit available here.
  • KT66DL advanced Multifunction tester available here.

The Kewtech KT66DL Comes Supplied With:

  • ACC064SP G7 Test probe with remote test button 
  • ACC065 G7 Test lead set
  • Batteries
  • Instruction Manual
  • Calibration Certificate
  • Software
  • Kamp12 Mains lead
  • Test lead pouch
  • Soft carry case
  • USB cable
  • Padded strap

Key Features:

  • User interface: Easy to use single rotary dial with four function softkeys and colour LCD 3.5” dot matrix display. 
  • ATT Loop: Anti-Trip Technology (with 2 & 3 wire) for no trip LOOP L-PE testing on all RCDs. 2 wire only option is very useful in case of no neutral (i.e. 3-phase motor lines & testing at switch points for lighting circuits).
  • Loop: High test current range of 2 with 0.001 resolution.
  • Zs Limit: Compares the values required by Electrical Installations Standard (BS7671- 18th Edition) with measured results.
  • 55V Loop: Low and high current loop test of 110V CTE circuits
  • RCD: Type AC, A, F, B (General & Selective), EV and Variable RCDs. Single, auto, ramp and contact voltage options. All autotest results displayed on one screen. 
  • Earth: Earth resistance test 2 and 3 wires option.
  • Insulation: Resistance test 100, 250, 500 & 1000V with auto discharge voltage.
  • Continuity: Continuity test at 200mA or 15mA with selectable buzzer for fast judgment.
  • Phase rotation: On 3-phase lines with clear indication of the sequence on the display.
  • Volts: TRMS Voltage measurements 2-600V, Mains Frequency.
  • SPD: Surge Protection Device test, for SPD that uses varistor.
  • PAT: Portable Appliance Tester function, for insulation and protective conductor resistance test.
  • Advanced memory: Assigns type of test (eg: R2 or R1+R2 for continuity), circuit number and DB to test results
  • Touch voltage: Selectable
  • Documentation: End of line calibration certificate and manual
  • Help: Display shows how to connect the instrument according to the function selected.
  • Protection: Supplied in heavy duty soft carry case and the instrument has a lid.
  • SAFETY: IEC 61010-1 CAT IV 300 V, CAT III 600 V. IEC 61557- 1,2,3,4,5,6,7,10

Primary Functions:

KT66DL Features

  KT66 Screen sample

KT66DL Screen Sample

Kewtech KEWEVSE Charge point Adapter:

The KEWEVSE is our brand new, comprehensive testing adapter for the testing of EV charging points. The adapter is compatible with the KT66DL and other brands of tester with EV capabilities.

The KEWEVSE is a great addition to your test equipment as it enables loop, RCD and RDCD (this new acronym for Residual Direct Current Devices) testing using a suitable MFT like the KT66DL. It simulates the presence of a car so the functionality of the EV supply equipment can also be tested including a PE fault. What’s more it is the smallest in class and has a handy carry bag included.

  • Enables testing of EV charging points
  • PE Pre-Test
  • PP simulation & CP states A, B, C, D
  • CP Error / PE Error/ Earth fault
  • LED indication of Phases

                          EVSE adpater

Kew EVSE Adapter Key Features:

  •  Enables electrical safety testing of electric vehicle charging points compatible with any EVSE testing equipment           
  • 4 mm connectors and alternative BS1363 socket for connecting your tester
  • For testing domestic and commercial EV charging equipment
  • PP simulation & CP states A, B, C, D
  • CP & PP state adjustment rotary switches
  • LED indication of Phases
  • CP Error / PE Error/ Earth fault
  • PE error & CP error simulation test
  • Oscilloscope output
  • Carry case included
  • Printed manual
  • Compact
  • Easy to use

Also Available:

  • ESKIT: Earth spike kit for earth resistance testing
  • PATDAPTER1: For PAT testing
  • ACC070: Fused probes
  • FC2000: Check box
  • KEWEVSE: EV charging point adapter


KT66ET Box   

ISSWWW and Kewtech

One of our longest-standing manufacturer partnerships and a brand that sells well day in day out for solid dependability and innovation at the price point.

Kewtech manufacture innovative, accurate and reliable test equipment that enables UK electrical contractors to undertake their testing obligations quickly and efficiently. 

A product with the “Kewtech” brand has been specifically designed for the UK market by a team with many years of industry experience. We pride ourselves on developing and manufacturing products that have real benefit to the industry.

Kewtech have consistently introduced industry firsts, like our Lightmate testing adaptors, the Pat Adaptor, the MFT with PAT testing plus download and our award winning RB1 Replacement Lamp. Our 18th Edition multifunction testers lead the way in ease of use, loop accuracy and repeatability of reading.

Kewtech KT63DL Technical Specification
Loop Impedance
Range 20.00/200.0/2000Ω (auto-ranging)
Display range 0.00 - 20.99Ω / 16.0 - 209.9Ω / 160 - 2099Ω
Measuring range 0 – 2000Ω
Accuracy ±2.0%rdg±8dgt
Open-circuit voltage 7 – 14V DC
Test current 200mA test: 200mA or more (2Ω or less)
15mA test: 15mA±3mA (short-circuit)

• Enabled if pre-set NULL value is 9Ω or less.

• Buzzer: Buzzer sounds when measured resistance is 2Ω or less.

Range 300.0/600V (Auto-ranging)
Display range Voltage: 2.0 – 314.9V, 240 – 629V
Frequency: 40.0 – 70.0Hz (displayed at 2V or higher)
Measuring.range Voltage: 2 – 600V
Frequency: 45 – 65Hz
Accuracy Voltage: ±2%rdg±4dgt
Frequency: ±0.5%rdg±2dgt
Uc (RCD)
Mains voltage range 100-260V
Range 100V
Display range 0.0 - 104.9V
Measuring range 0 - 100V
Accuracy +5%to+15%rdg ±8dgt 230V
Test current 50 % or less of IΔn
  Precise measurement Simplified measurement
Range 20.00 / 200.0 / 2000Ω (auto-ranging)
Accuracy 20Ω range; ±2%rdg±0.08Ω
The other ranges: ±2%rdg±3dgt
(Aux. earth resistance: 100Ω)
The other ranges: ±2%rdg±3dgt
Output current 20Ω range: approx. 3mA, 200v range: approx. 1.7mA
2000Ω range: approx. 0.7mA Frequency: 825Hz
Phase Rotation
Measuring Range 48 – 600V / 45 - 65Hz
Criteria of judgement Correct sequence: Clockwise symbol and “1, 2, 3” are displayed.
Reversed sequence: Counter-clockwise symbol and “3, 2, 1” are displayed.
Rated voltage 100V 250V 500V 1000V SPD (Varistor) 1000V
Range 2.000/20.00/200.0MΩ
20.00/200.0/2000MΩ 0 -1000V (increases in 1V steps)
Display range 0.000 - 2.099MΩ 0.00 - 20.99MΩ 0.00 - 20.99MΩ 1049V
1.60 - 20.99MΩ 16.0 - 209.9MΩ 16.0 - 209.9MΩ
16.0 - 209.9MΩ 160 - 1049MΩ 160 - 2099MΩ
Measuring range 0 - 200MΩ 0 - 1000MΩ 0 - 2000MΩ 0 - 1049V
Accuracy 2.000MΩ range: ±2%rdg±6dgt 20.00MΩ range: ±(2%rdg+6dgt), 200.0MΩ range: ±(2%rdg+6dgt) ±5%rdg±5dgt
20.00MΩ range: ±2%rdg±6dgt 1000MΩ range: ±(5%rdg+6dgt) 2000MΩ range: ±(5%rdg+6dgt)
200MΩ range: ±5%rdg±6dgt
Rated meas.
1.0 - 1.2mA
at 100kΩ
1.0 - 1.2mA
at 250kΩ
1.0 - 1.2mA
at 500kΩ
1.0 - 1.2mA
at 1MΩ
1.0 mA
3-Wire L-PE 2-Wire L-PE L-PE0.01ΩRes L-PE0.001ΩRes L-N/L-L
Mains input
voltage range
100 – 260V 50/60Hz
(L-N < 20Ω)
48 – 260V 50/60Hz 100 - 260V 50/60Hz 48 - 260V 50/60Hz
Range LOOP 20.00/200.0/2000Ω (auto-ranging)   20.00/200.0/2000Ω 2.000Ω 20.00Ω
PFC/PSC 2000A/20kA 2000A/20kA (PFC only) 2000A/50kA (PFC only) 2000A/20kA (PSC only) 2000A/20kA (PSC only)
Display range LOOP 0.00 – 20.99Ω
21.0 – 209.9Ω
210 – 2099Ω
0.00 –20.99Ω
21.0 –209.9Ω
210 –2099Ω
0.00 - 20.99Ω
21.0 - 209.9Ω
210 –2099Ω
0.000 - 2.099Ω 0.00-20.99Ω
PFC/PSC 0 – 2099A
2.10 – 20.99kA
0 – 2099A
2.10 – 20.99kA
(PFC only)
0 – 2099A
2.10 – 50.49kA
(PFC only)
0 – 2099A
2.10 – 20.99kA
(PFC only)
0 – 2099A
2.10 – 20.99kA
(PSC only)
Meas. range LOOP 0 – 2000Ω 0 – 2000Ω 0 – 2000Ω 0 – 2Ω 0 – 20
Accuracy LOOP ±(3%rdg+6dgt) ±(3%rdg+10dgt) ±(3%rdg+4dgt) ±(3%rdg+25mΩ) ±(3%rdg+4dgt)
PFC/PSC Depending on the accuracies of voltage and LOOP measurements
Test current @ 230V L-N:6A/60ms
N-PE:10mA (5.3Hz)
L-PE: 15mA 20Ω: 6A/20ms,
200Ω: 0.5A/20ms
2000Ω: 15mA/500ms
25A/20ms 6A/20ms
Mode Rated residual operating current (mA)(IΔn) Test current Duration
Current (mA) rms Accuracy @230V Meas. time Accuracy
x 1/2 AC G: 10/30/100/300/500/1000 S: 100/300/500 IΔn×1/2 -8% to-2% VAR:-10% to 0% 2000ms Trip Time
±3% of FS
A/F G: 10/30/100/300/500 AS:100/300/500 IΔn×1/2 -10% to 0%
B G: 10/30/100/300 S:100/300 IΔn×1/2 -10% to 0%
x 1 AC G:10/30/100/300/500/1000 S: 100/300/500 IΔn +2% to +8% VAR:0% to +10% G:550ms
A/F G: 10/30/100/300/500 AS:100/300/500 IΔn×1.4 (10mA: IΔn×2) 0% to +10%
B G: 10/30/100/300 S:100/300 IΔn×2 0% to +10%
6 mA DC IΔn 0% to +10% 10.5s  
x 5 AC G: 10/30/100 S: 100 IΔn×5 +2% to +8% VAR:0% to +10% 410ms  
A/F G: 10/30/100 AS: 100 IΔn×5×1.4 0% to +10%
B 10/30 IΔn×2×5 0% to +10%
20 to 110%
AC 10/30/100/300/500 S: 100/300/500 IΔn -4% to +4% by 10%
G: 300ms
S: 500ms
±3% of FS
A/F G: 10/30/100/300/500 AS:100/300/500 IΔn×1.4 (10mA:IΔn×2) -10% to +10%
B G: 10/30/100/300 S: 100/300 IΔn×2 -10% to +10% by 2% /150ms
Ramp EV 30 to 100% 6 mA DC IΔn -10% to +10% by 2% / 500ms  
General Specification
Applicable Standards IEC 61010-1 CATIII (600V) CATIV (300V) pollution degree 2, IEC 61010 -Tester , -2-030, -2-034,
IEC61557-1,2,3,4,5,6,7,10, IEC 60529 IP40, EN 61326-2-2 (EMC)
Dimensions & Weight 136 (L) x 235(W) x 114 (D) mm, 1300g including batteries (8 x AA / LR6)

Delivery Notices (Updated March 29th 2021)

During the current situation surrounding the effects of the Coronavirus pandemic, logistics from every company are under immense pressure to deliver goods on time.
Coupled with manufacturers on reduced output due to more stringent working practices and a global shortage of component parts to supply UK manufacturing, we have taken the decision to 
temporarily limit our services rather than let our customers down amid these unprecedented circumstances.
We hope you will understand our position on this and we apologize unreservedly for the inconvenience we know it will cause.

Please note that ALL orders placed before 3:00pm are shipped same-day (subject to stock and any additional services required).
The stated transport times above have some scope for adjustment built-in for the Covid-19 situation. Carriers themselves also have their own extended workload and limitations at this time which are unfortunately beyond our control.

Orders requiring calibration 

Whilst we take the greatest care to get all orders dispatched and delivered to you in the stated time frame, orders received PM and requiring
calibration may on occasion miss dispatch that day, according to the complexity of the calibration. Be assured they will ship on the next dispatch
this in most cases should not add more than 24 hours to your delivery.

Bank/Public Holidays

Predicted delivery times are based on regular trading days Monday to Friday. Public holidays, bank holidays and weekends are outside the usual scope
of our dispatch and subject to activities/holidays of our carriers and therefore may incur additional days lead time to your order.

*UK Mainland (Revised March 2021)

Service  Price 
Standard FREE 2-3 Day Courier Delivery – UK Mainland only - Zones A & B - Order value OVER £75.00 ex VAT - Order by 3:0pm FREE
Standard FREE 2-3 Day Courier Delivery – UK Mainland only - Zones A & B - Order value UNDER £75.00 ex VAT - Order by 3:0pm £4.75
Next WORKING Day (excludes Saturdays, Sundays and public holidays)  – UK Mainland only - Zones A & B  - ANY order value - Order by 3:0pm      £7.75
Saturday ANYTIME Delivery - Order by 3:0pm £9.95

New Postage Map Sept 2018>

Delivery Surcharges

Because of the high cost of carriage, we regretfully need to apply a surcharge on all deliveries made in the following regions:

  • Zones A & B  - Mainland delivery rates apply. 
  • Zone C - Scottish Highlands (Charges are calculated at the checkout).
  • Zone D - Outer Hebrides, Orkney Isles, Shetland Isles, Isle of Man, Scilly Isles, and Channel Islands (Charges are calculated at the checkout).
  • Zone E - Northern Ireland (Charges are calculated at the checkout).
  • Zone F - Republic of Ireland (Charges are calculated at the checkout).

Offshore Services

All offshore deliveries are a 3-4 day service as standard. This includes Channel Islands, Northern & Southern Ireland, Scottish Islands, Isle of Man and the Scilly Isles.

International delivery

International delivery charges are automatically added to your order at the checkout. For any questions regarding international deliveries please contact us at


All export inquiries should be directed to the export division before placement of order.

If no shipping option is available to your selected country please call us FREE on 0800 0224 060 to purchase your items.
All stated prices are subject to VAT at the current rate where applicable.