During my time at the Solar Power International show in Orlando last week I had a chance to stop by and chat with Woehner about power distribution and control. The company displayed several important products that it says help the commercial, industrial and utility photovoltaic market deal with these important issues.
“As alternative energy needs grow there is a corresponding requirement for new products and solutions that facilitate the challenge of reliable distribution and control of power – which are critical safety aspects in the photovoltaic market,” says Kevin Saunders, MD of Woehner USA.
For instance, the company says its AMBUS EasySwitch 1000Vdc is aimed at North American solar combiner box and solar inverter manufacturers who build to the UL1741 standard. The 10×38 fuse holder is suitable for use with both 1000Vdc rated UL2579 listed PV fuses or IEC60269-2 certified gPV fuses. It is IP20 touch-safe and provides a safe, tool-free fuse insertion and extraction, for easy fuse installation and replacement. Two versions are available: A standard version that does not include LED lamps and a LED-indicator version that has 2 LED lamps. Depending upon the wiring of the fuse holder and the polarity of the system wiring, one lamp will glow immediately when a fuse opens. The AMBUS EasySwitch offers a UL4248-18 listing at 1000 volts DC for 10×38 fuses as large as 30 amps.
Likewise, Woehner says its 60-mm busbar system and power distribution components are perfect for AC or DC voltage at up to 4000 amps of current. It uses tinned plated copper busbars, spaced at 60mm, to distribute AC or DC voltages of up to 1500Vdc. The 60mm system also provides an alternative wiring practice, that takes the place of traditional American Wire Gauge cabling and power distribution blocks or a fabricated busbar construction. It uses compression connection components instead of the traditional method of drilling holes through raw copper busbar stock in a fabricated power distribution structure.
“The 60mm system is important to the PV market because it distributes higher levels of current than traditional power distribution blocks, eliminates parallel lengths of AWG cables and the space required to bend these cables into place. System components can be used to make the final assembly IP20 touch safe,” adds Saunders.
Lastly, Telergon’s S5000 DC load break switches are ETL recognized to the UL98B standard at 1000Vdc and are aimed at North American photovoltaic installations that require NRTL (Nationally Recognized Test Laboratory) certification. They are currently available in four models: Size 1 (250 amp), Size 2 (400 amp), Size 3 (700 amp) and Size 4 (1250 amp).
Telergon’s S5000 DC load break switches are typically used in string combiner boxes, re-combiner boxes and inverters that are constructed to the UL1741 standard and can be used to safely disconnect live direct current at up to 1000Vdc.
Woehner USA is the official distributor for the complete range of Telergon photovoltaic (PV) switches in North America.