29/05/2023
PVCHECKs-PRO ..... Now Available! 👀 HT Instruments
The HT ITALIA New Commissioning tester up to 1,500V and 40A
PVCHECKs-PRO is a one-stop test solution to meet the IEC 62446-1 standards for category 1 tests.
PVCHECKs-PRO performs on single-face (SF) as well as on bifacial (BF) photovoltaic systems all tests required by the IEC 62446-1 to commission a photovoltaic installation in automatic sequence. Therefore, by a single GO-key stroke PVCHECKs-PRO measures and tests:
- continuity of protective earthing and/or equipotential bonding conductors, where fitted;
- polarity test;
- string open-circuit voltage test up to 1500V;
- string short-circuit current test up to 40A;
- insulation resistance of the DC circuits by generating up to 1500V even on live circuits.
As required by IEC 62446-1, PVCHECKs-PRO compares the just-measured values of string Voc and Isc to the previously measured strings composing the PV installation to prevent voltage and current mismatching.
By measuring the solar radiation (SOLAR03 required) and PV module temperature, PVCHECKs-PRO can extrapolate Voc and Isc to the STC (Standard Test Conditions: 1000W/m2, 25°C, AM 1.5) to compare them to the nominal values as provided by the module manufacturer.
The internal database already stores the most popular modules, more modules can be added. Finally, PVCHECKs-PRO provides a positive or negative outcome (OK/NO).
Insulation resistance of DC circuits is performed according to IEC 62446-1 test method 1. Two tests are then performed: a first test between array negative and earth followed by a second test between array positive and earth, avoiding the use of any short-circuit switch box. According to IEC 62446-1, insulation resistance test method 2 would require the use of a short-circuit switch box (incorporating a load break rated DC switch) to safely make and break the short circuit connection - after array cables have been safely connected into the device.
Troubleshooting is a time consuming and costly activity. Any time an inverter shuts down because of lack of insulation, the quickest it is recovered it to normal operation, the quickest the installation returns to generating power and income. GFL is the new function PVCHECKs-PRO performs answering each technician’s question: where is the fault? By this function PVCHECKs-PRO indicates the precise position of the lack of insulation, so the technician can go without fail to service the broken component.
