Photovoltaic combiner box factory test report

How are PV DC combiner boxes tested?

PV DC combiner boxes are tested according to IEC-61439-2 and are constructed on the basis of the test results as well as assembled for the specific application. This ensures that each of the requirements of the target application is fully met.

What is a DC combiner box?

Our DC combiner boxes offer users the possibility to integrate short-circuit and overvoltage protection, as well string monitoring solutions (I,V, T and SPD and switch isolator status), for PV systems using central inverters with PV panels in trackers and fix tilt systems.

Can a PV system use a fuse as a ground detector?

In general, PV systems that use a fuse as a ground detector have a very low impedance path to ground at the inverter, making the problem observed in Europe extremely unlikely for PV systems with a fuse as a ground detector. Figure 8. Monitor in external enclosure Figure 9. PV output circuit combiner equipped with residual current monitor

Do PV modules leak more current than home run conductors?

PV modules typically leak much more current than the home run conductor insulation, unless the conductors are damaged. This can hide the variation of insulation resistance of the conductors. To avoid this limitation, it is common to test the home run conductors separately.

How do PV array performance measurements work?

PV array performance measurements are always paired with simultaneous (as nearly as possible) measurements of irradiance and module temperature, which provide the basis for evaluating the array performance data.

What is PV throughput & why is it important?

Throughput Throughput means the number of PV strings that can be performance-tested per hour, and it is an important consideration when testing large projects. Throughput depends on several factors. One of the most basic is the ability of the equipment to dissipate electrical power.