COMBI521 | Multifunction


Multifunction tester for electrical installation safety tests, power quality analysis and EVSE safety tests

Multifunction instrument for electrical installation safety testing, power quality analysis and EVSE safety testing

COMBI521 carries out tests on electric systems in compliance with IEC/EN 61557-1 and therefore measurements of continuity of the protection cable, insulation resistance (with calculation of PI and DAR), overall earth resistance, RCDs type B/B+, A/F, DD, CCID and AC tripping time and current, line / fault impedance with calculation of prospective short circuit / fault current, phase sequence and conformity. COMBI521 also allows measuring and saving environmental parameters (illuminance, temperature), leakage current and electric quantities such as voltage, current, power factor, power and harmonics on single-phase systems. In combination with EV-TEST100, COMBI521 performs verification and control of electric car charging stations (EVSE) in accordance with IEC / EN 61851-1 and IEC / EN60364-7-722 standards.
COMBI521 is provided with the innovative AUTO function: by selecting this function and only setting the value of RCD current, COMBI521 carries out tests of overall earth resistance, RCD tripping time and insulation resistance in a sequence. At the end of the test, the device shows all results with the indication of compliance or non-compliance with the standards with simple OK or NOT OK symbols.

The internal memory allows saving the measures and subsequently transfer them onto the PC through the optical/USB connection. Thanks to the brand new HTAnalysis App, free to download for iOS and Android systems, COMBI521 is capable of transferring measured and recorded data onto tablets and smartphones, thus giving the operator the possibility to customize and share through HtCloud the result of their tests.

  • All electrical safety measurements as required by the international safety standards

  • AUTOMATIC test (no-trip ground resistance, RCD tripping time, insulation resistance) in a sequence

  • Continuity of protective conductors with 200mA

  • Insulation resistance up to 1000V, with dielectric absorption ratio D.A.R. and polarization index P.I.

  • Polarity test

  • Type A/F, AC, B/B+, DD, CCID General and Selective RCD tripping time and current

  • Line/Fault impedance, Phase-Phase, Phase-Neutral, Phase-PE (also at high resolution with optional accessory IMP57)

  • Coordination of MCBs and fuses

  • Global earth resistance

  • Phase sequence and conformity measurement

  • Measurement of leakage current

  • Measurement of electrical parameters in single-phase installations (V, A, W, VAR, VA, PF)

  • Measurement of environmental parameters through external probes (HT52/05 and HT53/05)

  • Internal memory and PC connection

  • Wi-Fi connection to Android and iOS smartphones and tablets

Sequence of tests for the verification of electric columns With EV-TEST100 adapter
AUTO test (Non-trip ground resistance, RCD, Insulation) in sequence  
Insulation with voltage 50, 100, 250, 500, 1000VDC  
Measurement of polarization index P.I.  
Measurement of dielectric absorption ratio D.A.R.  
Continuity of protective circuit with 200mA  
Tripping time and current of RCDs type A, AC Standard, Selective B type up to 300mA
Tripping time and current of F-type RCDs  
Non-trip earth resistance  
Loop/Line impedance, Phase-Phase, Phase-Neutral, Phase-PE  
Loop/Line impedance Phase-Phase, Phase-Neutral, Phase-PE with high resolution (0.1mΩ) With optional accessory IMP57
Contact voltage  
Percentage voltage drop on the line  
Phase sequence  
Leakage current with optional clamp meter  
Measurement of Voltage, Current, Active, Reactive, Apparent Power  
Measurement of Cosphi, Power Factor  
Voltage and current harmonics up to the 49th with THD 49th
Measurement of environmental parameters (°C,°F, %RH, Lux)  
Test with remote lead PR400
Help on line on the display  
Internal memory for measured data saving  
Integrated WiFi connection and compatibility with HTANALYSIS App  
Optical/USB serial port for PC connection  
Mechanical protection  
Power supply  
Protection category CAT IV 300V
Weight in grams (batteries included) 1200
Size (LxWx H) (mm) 222x162x57
  • 17th edition
  • CEI 64-8
  • IEC/EN61010-031
  • IEC/EN61010-1
  • IEC/EN61010-2-030
  • IEC/EN61010-2-033
  • IEC/EN61010-2-034
  • IEC/EN61187
  • IEC/EN61326-1
  • IEC/EN61557-1
  • IEC/EN61557-10
  • IEC/EN61557-2
  • IEC/EN61557-3
  • IEC/EN61557-4
  • IEC/EN61557-6