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| UL compliant Sinvert solar inverter  Siemens Industry, Inc. announced at Solar Power International in Anaheim, Calif., the introduction of the UL compliant Sinvert PVS350T UL. Built on the internationally proven Sinvert platform, this inverter was designed to meet UL standards required by utilities in North America to feed solar power into the grid. In addition to complying with UL standards, this inverter from Siemens meets international standards: DIN, VDE, IEC, EN. The Sinvert PVS350T UL is a 350kW solar inverter for photovoltaic (PV) fields with 600 VDC input. It takes the energy gathered by the solar panels from the sun and converts it into AC power that provides electricity for industrial and residential consumers. Its application software and firmware are UL 1998 listed. The inverter will be certified to UL 1741, CSA 107.1 and CEC standards and features: under-over-voltage control, under-over-frequency control, open phase control, grid synchronization and anti-islanding protection, which detects and isolates the system from grid failure under matched load conditions. Built in accordance with a stringent ISO 9001 quality system, the inverter has been optimized for high efficiency and has a compact design and footprint that facilitates easy installation. Architecturally, three inputs with LV HRC fuses and DC contactors are provided at the PV field end, a combination that can be used to isolate the inverter from the PV field. Additionally, the IGBT-based power unit coupled with a low-voltage transformer provides galvanic isolation between the PV field and AC output, which prevents unwanted current from traveling between units sharing a ground conductor. Additionally, it increases safety by preventing accidental current from reaching the ground. Separately, a contactor and discrete circuit breaker can be used to disconnect the unit from the grid. Overvoltage protection devices are installed at the AC output and DC inputs. Additional new features include cluster control, optional PV array isolation measurement and optional symmetry monitoring. With the cluster control operation up to four inverters can be interconnected at a common DC bus to increase efficiency, reduce light-load losses and enhance system reliability. The PV array isolation measurement detects faults in the PV array much earlier than existing ground fault detection techniques. With the symmetry monitoring option, the current of each DC input is monitored separately and analyzed over a long time period to allow for detection of power losses due to defective PV panels. write your comments about the article :: © 2009 Construction News :: home page |