MI 3144 Euro Z 800 V Featured

Other instruments / adapters / accessories

The MI 3144 Euro Z 800 V is a multifunctional, portable battery (Li-ion) or mains powered test instrument with excellent IP protection: IP65 (case closed), IP54 (case opened). It can be controlled via an Android app A 1522 aMESM, MI 3152 EurotestXC, MI 3152H EurotestXC 2.5kV, MI 3155 EurotestXD or MI 3325 MultiServicerXD. The MI 3144 Euro Z 800 V is intended for measuring the effectiveness of automatic trip out protection in case of faults in transformers and other HV equipment. With its high precision line and loop impedance measurements on AC and DC circuits, high current dR 300A loop and line measurements for testing of partial currents and partial voltage drops, it is ideal for testing in industrial settings. It also supports contact voltage measurements, ELR electrical leakage relay testing with fault current injection, trip-out time measurement and DC source, line, battery and accumulator measurements.


Standards applied

IEC/EN 60909

  • IEC/EN 60909-0

IEC/EN 60974

  • IEC/EN 60974 series
  • IEC/EN 60974-2

IEC/EN 61557

  • IEC/EN 61557 series
  • IEC/EN 61557-3

IEEE 81-2012

  • IEEE 81-2012


Key features

  • High orecision 4-wire 300 A Z Line and Z Loop Impedance Tester;
  • High range impedance measurements in 800 V / 16 ... 420 Hz AC networks;
  • DC Source & Line Resistance measurements in 3 ... 260 V DC networks;
  • Hi Current dR 300 A 4-wire Partial Voltage drops and Current's Path Resistances;
  • Earth Leakage Relay (ELR) Trip-out Testing Time and Current;
  • ELR supported types AC, A, B;
  • Ground fault analysis with contact, touch and step voltage;
  • Floating voltmeter for partial contact results;
  • One-Clamp Hi current grounding method with clamps (Flex & Iron);
  • Selectable test load (16.6 % to 100 %);
  • Improved thermal performance;
  • Portable battery (Li-ion) or mains powered test instrument;
  • IP protection: IP65 (case closed), IP54 (case opened);
  • CAT IV 600 V (3000 m) safety category;
  • Bluetooth communication;
  • Black box design (remote-controlled via an Android device).

Technical data

  • Dimensions (w x h x d): 360 mm x 160 mm x 330 mm
  • Weight (without accessories): 6,5 kg 



  • Single clamp method for testing lightning system

Renewable energy sources

  • Equipotential bonding of a metal construction
  • Wind generator inverter testing

Substations and transformers

  • Impedance of live transformer and fault currents with hot factor

Installations exceeding 1 kv

  • Partial earth bond resistance with single flex clamp method
  • Earth leakage relay and fault currents

Low Voltage Electrical Installation Safety

  • Substation electrical safety
  • Mains bonding and touch voltages during fault
  • Switchboards and automatic trip-out protection

Hospital earthing and lightning protection 

  • Mains bonding and touch voltages during fault current



Download File Language Version Release Notes Type Size View Download
Other MI 3144 Euro Z 800V ąnd MI 3143 Euro Z 440V en 2019 18.03.2019 Brochure pdf 15.15 MB
Datasheet MI 3144 Euro Z 800V en 2019 28.02.2019 Single leaflets pdf 922.51 KB
Manual MI 3144 Euro Z 800V en 1.3.4 28.04.2020 20 752 881 pdf 2.22 MB Login
PC Software Metrel ES Manager Multi-Language 30.04.2020 Readme zip 237.97 MB Login