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Megger MFT1741+
  • Megger MFT1741+
  • Megger MFT1741+ Multifunction Tester
  • Megger MFT1741+ Multifunction Tester
  • Megger MFT1741+ Multifunction Tester

Megger MFT1741+ Multifunction Tester

Megger approved distributor and service centre.

Includes: Printed quick start guide, Full user guide on CD, Calibration certificate, Switched probe SP5, Neck strap, 3 Wire lead set with prods and clips, Mains plug test lead (BS1363), AC battery charger, Large soft pouch.

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The Megger MFT1741+ multifunction tester is an instrument designed for testing low voltage electrical installations and especially in locations that suffer from high electrical noise. It provides all the tests required to complete the necessary electrical certification for industrial, commercial and domestic fixed wiring installations.

The MFT1741+ offers a wide range of test functions, designed for all electrical installation testing and verification of low voltage building wiring and distribution testing scenarios. The MFT1741+ is IEC 61010 CAT IV 300 V rated for safe connection anywhere within the LV network on single and 3 phase systems.

New Loop Impedance testing technology

Prevents any influence the RCD may present to the total loop impedance value.
Faster non-trip loop testing down to 8 seconds.
This technique also allows testing of loop impedance through 10mA type ac and Type A RCDs.

New “Confidence meter*” measurement analysis (Patent pending)

Overlaying the new non-trip loop impedance measurement is the new Megger “Confidence meter”. As loop impedance values can be dramatically affected by circuit noise, the Confidence Meter displays the degree of confidence in the accuracy of the measured loop impedance. Using the digital ARC to indicate the analytical process, the measurement is continually monitored and adjusted when circuit noise is present, resulting in a dramatically improved and repeatable test result.

New electric vehicle charge point testing

The MFT1741+ includes an automatic EV Charge Point RCD test sequence, including the 6 mA dc test*. Test results can be reviewed or saved to memory and reviewed later.


Testing of Electric Vehicle Charge Points*.
Enhanced non-trip loop impedance measurement technology.
“Confidence meter” measurement analysis (patent pending).
Full single and 3 phase compliant installation testing.
10 mA to 1 A single and 3 phase RCD testing.
Earth testing and stake-less testing for electrode resistance measurement*.
Simple colour-coded test selection.
Ambidextrous operation.
Internal memory and Bluetooth® communications.
EN61010 CAT IV safety rating and tough IP54 case.

MFT1741 Quick Feature Chart
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 (no earth)
30, 100, 300 and 500 mA RCD
10 mA and 1000 mA RCD
Other features
Supply measurement
True RMS
Phase rotation
Hard moulded case
Confidence meter noise reduction
New hardware loop test platform
* requires optional accessory
Megger MFT1741+ Specifications
Insulation Test
Output voltage-0% +20% at rated load or less.
Voltage display±3% ±3 digits ±0.5% of rated voltage.
Short circuit current1.5 mA nominal test current.
Test current on load1 mA at min pass values of insulation.
Insulation Accuracy
1000 Volts10 kΩ ~ 999 MΩ±3% ±2 digits.
500 Volts10 kΩ ~ 500 MΩ±3% ±2 digits.
>500 MΩ±10% ±4 digits.
250 Volts10 kΩ ~ 250 MΩ±3% ±2 digits.
>250 MΩ±10% ±4 digits.
100 Volts10 kΩ ~ 100 MΩ±3% ±2 digits.
>100 MΩ±10% ±4 digits.
Resistance and Continuity
0.01 Ω ~ 99.9 Ω±2% ±2 digits.
100 Ω ~ 99.9 kΩ±5% ±2 digits.
Open circuit voltage5 V ±1 V.
Test current (user selectable)(0 Ω ~ 2 Ω).
205 mA ±5 mA.
15 mA ±5 mA (user selectable).
Loop Test
Live to earth/neutral supply48 V ~ 280 V (45 Hz ~ 65 Hz).
Live to live supply48 V ~ 500 V (45 Hz ~ 65 Hz).
L-N/L-L tests±5% ±5 digits.
L-E tests0.1 Ω ~ 39.9 Ω±5% ±5 digits ± noise margin.
40.0 Ω ~ 1000 Ω±10% ±5 digits.
Display range0.01 Ω ~ 1000 Ω.
Live to earth PFC range20 kA
Live to live PSCC range20 kA

† Reference conditions apply.
For test environments see service data.

RCD Tests
Supply up to 100 mA48 V ~ 480 V (45 Hz ~ 65 Hz).
Supply up to 1 A48 V ~ 280 V.
RCD typeType AC, A, S.
Type B (pure dc).
No trip test(1/2xI)–10% ~ –0%.
Trip test(1xI, 2xI and 5xI)+0% ~ +10%.
EV30 mA ac, 6 mA dc (Mode 1 + 2).
(Mode 1 + 2) Ramp Test
Touch voltage (0 ~ 253 V)+5% +15% ±0.5 V.
Trip time±1% ±1 ms.
Trip current±5%.
Step Increments
VAR (variable RCD selection)10 mA ~ 50 mA1 mA steps.
50 mA ~ 500 mA5 mA steps.
500 mA ~ 1000 mA10 mA steps.
Supply Measurement
Voltage10 V ~ 600 V.
(15 ~ 400 Hz) True RMS.
±3% ± 1 V ±2 digits.
Phase rotation indicationL1–L2–L3 and L1–L3–L2.
Frequency15 Hz ~ 99 Hz ±0.5% ±1 digit.
100 Hz ~ 400 Hz ±2.0% ±2 digits.
Frequency resolution0.1 Hz.
Power Supply
BatteriesIEC LR6 type AA alkaline (6 cells - supplied) or 1.2 V NiMH (rechargeable pack of 6 – supplied).
Mains charger for on-board re-charging (4 hours typical) 12 V car charger (cigar lighter lead - optional).
Earth/ Ground Test
Resolution0.01 Ω.
Current0.45 mA or 4.5 mA.
Noise rejection20 V pk/pk (7 V rms).
Max probe resistancesRp and Rc.
100 kΩ @ 50 V.
5 kΩ @ 25 V.
2 and 3 pole method(0.01 Ω ~ 1.999 kΩ).
±2.0% ±5 digits.
ART method (1.00 Ω ~ 1.999 kΩ).
±5.0% ±5 digits*.
Stakeless method(1.00 Ω ~ 199 Ω).
±7.0% ±5 digits*.
(via optional clamp meter)±5.0% ±3 digits.
Range0.1 mA to 200 A ac.
Resolution0.1 mA.
mV Sensor Input 
Including temperature (third party module)±1.0% ±2 digits.
Range0.0 mV to ±199.9 mV dc.
Resolution0.1 mV.
Data storage
Capacity1000 results.
Bluetooth® communication.
SafetyIEC 61010-1:2010.
IEC 61010-30:2010.
IEC 61010-031:2008.
600 V CAT III / 300 V CAT IV.
(Max Phase to Phase 600 V).
IEC 61557:2007 parts 1 to 10.
EMCIEC61326 edition 2 location class B.
Operating temperature range and humidity-10 °C ~ +55 °C.
90% R.H. at +40 °C max.
Storage temperature range and humidity-25 °C ~ +70 °C.
Maximum altitude2000 m.
IP ratingIP54.
Calibration temperature+20 °C.
Temperature coefficient<0,1% per °C For test environments see service data.
Weight (instrument and case)1 kg (with batteries, excluding case).
Dimensions (instrument and case)220 mm (H) x 390 mm (W) x 285 mm (D).
Megger MFT1741+ warrantyThree-years.


Megger MFT1741+ Datasheet

PDF Specifications of the Megger MFT1741+ multi function installation tester with electrical vehicle charge point testing capabilities.

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