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, A 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, AC, B 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