Within the solar installation is the inverter which receives Direct current (DC) from solar strings as input and puts out Alternating Current (AC) to the grid on the output end. During installation, routine maintenance and emergencies it is necessary to isolate the panels from the AC side, and hence, a manually operated isolating switch is placed between the panels and the inverter input. Such a switch is called a DC isolator because it provides DC isolation between the photovoltaic panels and the rest of the system.This is an essential safety switch and is mandated in each photovoltaic power system according to IEC 60364-7-712. The corresponding British requirement comes from BS7671 – Part 712.5126.96.36.199, which states “To allow maintenance of the PV convertor, means of isolating the PV convertor from the DC side and the AC side must be provided”. Specifications for the DC isolator itself are given in the “Guide to the Installation of PV Systems”, section 2.1.12 (Edition 2).
A DC isolator can be single pole or double pole. A single pole isolator can be used when a grounded array is to supply a transformer based inverter (inverter feeds the grid through an isolating transformer). When an ungrounded array is required to feed a transformer-less inverter, a double pole DC isolator switch is required. Models of isolators are also available which have an AC isolator in addition to a DC isolator.
Choose our line of disconnect switches that are up to 1000V and properly disengaged power when toggled. With a patented arc-extinguishing chamber, we guarantee better solar DC safety. Equipped with a waterproof plug and made with UV resistant material, our disconnect switches are capable of withstanding extreme conditions. Lockable handles are added to improve safety.
The stability offered by our isolator switches are made possible through our advanced manufacturing capabilities. Using several production lines allows us to deliver orders at any volume on time.