DC Disconnect Switches for Photovoltaic and ESS Systems
Telergon DC disconnect switches provide load-break isolation for photovoltaic, energy storage, and other high-voltage DC applications. The range includes heavy-duty UL 98B disconnects rated up to 1500 VDC and compact UL 508I disconnects rated up to 1000 VDC, with IEC 60947-3 ratings available by series and model.
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DC Disconnect Switch FAQs
What certifications are required for DC disconnects in solar and energy storage applications?
Certification requirements depend on the application, system design, and applicable electrical code. Telergon S6, S6R, and S7 heavy-duty DC disconnects are available with UL 98B certification, while F7 compact DC disconnects are available with UL 508I certification. Many models are also designed to IEC 60947-3. Always verify the certification and ratings of the specific model for the intended installation.
Can Telergon DC disconnects be used for both PV and battery systems?
Yes, when the selected disconnect is properly rated for the system voltage, current, circuit configuration, and application. Product suitability varies by series and model, so verify the published ratings for the specific installation.
What enclosure ratings are recommended for rooftop or outdoor renewable systems?
The required enclosure rating depends on the installation environment. Outdoor, rooftop, wet, dusty, or corrosive locations may require NEMA / UL Type 4 or 4X or an appropriate IP rating. The complete installed assembly, including the enclosure, operator, and mounting arrangement, must maintain the required environmental rating.
Why are DC-specific disconnects necessary in renewable systems?
Interrupting DC is more demanding than interrupting AC because DC current does not naturally pass through zero each cycle. DC disconnects are specifically designed and rated to safely interrupt and isolate circuits at their published DC voltage and current ratings.
How can we assist?
For product inquiries, technical support, or distributor information, please use the contact form or call us at +1 470 912 3421.