Woehner USA announces UL98B Recognized DC Load Break Switches

Telergon's S5000 DC load break switches are currently available in four models: Size 1 (250 amp), Size 2 (400 amp), Size 3 (700 amp) and Size 4 (1250 amp).

Portsmouth, NH. August 23, 2012 –Woehner USA has announced the commercial availability of Telergon's S5000 DC load break switches which are ETL recognized to the UL98B standard at 1000Vdc. Woehner USA is the official distributor for the complete range of Telergon photovoltaic (PV) switches in North America.


Telergon's S5000 DC load break switches are aimed at North American photovoltaic installations that require NRTL (Nationally Recognized Test Laboratory) certification. They 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.

The S5000 DC load break switch is constructed with four poles. The contact carrier, inside the switch, breaks the circuit in eight positions (two per pole). It is certified for system wiring in a 4+0 configuration (single polarity), using jumper bars between three of the switches' adjacent terminal connections. This wiring configuration is used most predominately in grounded PV systems.

"We have the unique advantage of being certified for breaking both positive and negative polarities when wired as a two pole switch, using two jumper bars, in either a 3+1 or 2+2 configuration," said Kevin Saunders, Managing Director of Wöhner USA. "This wiring is used most frequently in ungrounded photovoltaic systems that are predominant in European installations, and this two-pole configuration is growing in popularity in North America."

Telergon's S5000 DC load break switches are currently available in four models: Size 1 (250 amp), Size 2 (400 amp), Size 3 (700 amp) and Size 4 (1250 amp).

Woehner USA and Telergon have been working together in the North American PV market for a while. "We have managed the NRTL test project for Telergon's S5000 DC Load break switches. Telergon has provided exemplary support for the product and excellent management of the manufacturing process to keep up with the growing North American demand for these unique disconnect switches," adds Saunders.

About Woehner

Tradition and innovation you can rely on. Since 1929, Woehner has contributed to the safe and efficient distribution of electrical energy. Through eight subsidiaries, one joint venture and a comprehensive global network of distributors, Woehner is able to provide a range of reliable, innovative and safe products that guarantee the low voltage supply of electricity for use in a wide variety of industries.

Featured Product

sonnenBatterie eco

sonnenBatterie eco

Sonnen's mission is to provide clean and affordable energy for all. As the first mainstream grid tied residential energy storage company in the world and with 24,000 sonnenBatterie systems installed worldwide, sonnen is a proven global leader in intelligent energy management solutions. The all-in-one sonnenBatterie smart energy storage solution easily integrates with new and existing solar installations to help homes manage their energy throughout the day-saving money, providing backup power, and maximizing the effective use of solar power day and night. Sonnen has won several awards for its energy innovations, including the 2017 Zayed Future Energy Prize, MIT's Technology Review's 50 Smartest Companies in 2016, Global Cleantech 100 for 2015-2017, Greentech Media's 2016 Grid Edge Award for Innovation, and Cleantech's 2015 Company of the Year Award in both Israel and Europe.