PV-255s | Commissioning and Maintenance


Multifunction device for checking electric safety and performance of a photovoltaic system

Multifunction instrument for electrical safety testing and troubleshooting of photovoltaic systems up to 1,500V DC.

- Insulation measurement up to 1,500V DC even on live systems

- Localization of the faulty module through the new GFL function

- Continuity of the protective conductor with 200mA

PV-255s represents a real innovation in the panorama of PV verification and testing instrumentation. PV-255s measures the insulation resistance of a single module, a string or even an entire photovoltaic field up to 1,500 V DC according to IEC/EN62446 standard. Traditional insulation meters would require a DC-rated switch-box to short-circuit the positive and negative terminals of the module/string/PV field under test. With PV-255s the use of any external device is not required, PV-255s carries out the measurements in full autonomy and self-sufficiency. In addition, through the new GFL (Ground Fault Locator) function, PV-255s indicates the position of any poor insulation on a string of the photovoltaic system, due, for example, to water or humidity leakage.

Available through HT China office on the Chinese market only. For the international market please refer to PV-ISOTEST.

  • IEC/EN61010-031
  • IEC/EN61010-1
  • IEC/EN61010-2-030
  • IEC/EN61010-2-033
  • IEC/EN61010-2-034
  • IEC/EN61326-1
  • IEC/EN61557-2
  • IEC/EN61557-4
  • IEC/EN62446-1