The Best Connection for Photovoltaic Systems

Wieland Electric’s PST 40i1 photovoltaic plug connectors have passed this year’s extensive product test in the specialist magazine “Photon” with top grades, once again proving the extremely high quality of this product. They meet the requirements of the DIN EN 50521:2009-10 standard for plug connectors in photovoltaic systems, and despite a high current carrying capability of up to 40 A, they can be handled safely and mounted in just a few steps.

Wieland Electric’s PST 40i1 photovoltaic plug connectors have passed this year’s extensive product test in the specialist magazine “Photon” with top grades, once again proving the extremely high quality of this product. They meet the requirements of the DIN EN 50521:2009-10 standard for plug connectors in photovoltaic systems, and despite a high current carrying capability of up to 40 A, they can be handled safely and mounted in just a few steps.

After the photovoltaic plug connectors ranked among the best products in the “Photon” test last year, the pre-assembled version of the PST 40i1 connector took first place in this year’s test, with the version for assembly in the field ranking among the 10 best plug connector types. Overall, 40 plug connectors from 24 manufacturers were tested.

Wieland’s photovoltaic plug connectors achieved excellent results in the test category “transition resistance”, which greatly affects the power loss in a photovoltaic system. Wieland uses brass turned contacts which are silver-plated. This keeps the transition resistance extremely low, even after 100 tested plugging cycles and a long service life.

Unlike many of the other tested products, Wieland’s plug connectors are suitable for high currents of up to 40 A and they were the only product tested which can be used with connection cross-sections of up to 10 mm². This also provides a margin of safety for overload or lightning strikes.

The mating and disconnect forces also scored high marks, as they ensure high operational reliability. Wieland plug connectors are latchable and have an extremely high retention force. This avoids unintentional disconnection and prevents dangerous arcing when the plug connectors are disconnected during operation. The cable disconnect forces are so high that exposed cable ends do not present a safety hazard, regardless of the strain on the cable. The difference between the latching retention force and the cable disconnect force is therefore extremely high. Nonetheless, the photovoltaic plug connectors can be connected easily, as the innovative design keeps the mating forces extremely low. A latching clip is also available as an option, which can only be opened using a tool. This additional latching means that the plug 3 connectors fulfill the requirements for the American market according to NEC 2008; they have also been approved by the American testing institute ETL according to UL standards.

The photovoltaic plug connector grip is made of dyed black plastic which is highly UV and ozone-resistant. The photovoltaic plug connectors are resistant to heat, cold, dirt and moisture, they are impact-proof and fulfill degree of protection IP 67 and even IP 68 on request.

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