Cofrete echipate cu descărcătoare de supratensiune

In many Photovoltaic Systems, the load-break switch required by the IEC 60364-7-712 Standard is located in the Inverter. As a result the lines between the Solar Modules and the Inverter are still live even after disconnection. According to ÖVE guideline R11-1: 2022 PV Systems require a fire protection disconnection device.

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General

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• With PV Systems, there is a risk that despite switching off the AC Voltage Circuit, even due to artificial light incidence, the Voltage may be present on the DC side.

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• Safety measures are necessary because the insulation condition can be considerably reduced by natural Events, fire or extinguishing measures and cables can break. Touching these cables, even if they are on the ground, as well as touching metal Parts that are not live in a normal state (e.g. machines, overhead telecommunication lines, antennas, sheet metal roofs and walls, gutters, water or gas pipes, metal fences) can be dangerous. These metal parts can be under tension.

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• In the event of an emergency, e.g. fire on the building, storm, ice fall, hazards for persons and emergency services can be e.g. Impairment of the measure of fault protection Protective insulation according to ÖVE/ÖNORM E 8101-1 in the DC area of a PV System result. It must be ensured that the Dangers for the emergency Services are kept as low as possible in an emergency.

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• In order to be able to optimally solve these requirements, line contactors are available which, remotely controlled via a fire brigade emergency stop button, de-energise the entire system voltage-free via a fire brigade emergency Stop Button. For optimal use, the line contactors are built into the surge boxes and are available in different versions depending on the application:

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<tab>Schrack Combibox with Photec BC 1,000VDC for 2 strings for 1 MPP-Tracker Inverter

<tab>Schrack Combibox with Photec C 1,000VDC for 2 strings for 1 MPP-Tracker Inverter

<tab>Schrack Combibox with Photec BC 1,000VDC for 2 strings for 2 MPP-Tracker Inverter

<tab>Schrack Combibox with Photec C 1,000VDC for 2 strings for 2 MPP-Tracker Inverter