Enhancing Safe and Efficient Distributed Generation: ONCOR

Implementing on-site distributed generation (DG) solutions demands meticulous attention to safety and reliability. At Big Shine Energy, we specialize in seamlessly integrating customer-owned DG systems with Utility companies’ rigorous requirements, safeguarding the grid infrastructure. In this blog tailored for the ONCOR region, we outline a few of the essential guidelines and requirements for DG facility installation and parallel operation.

Navigating the Interconnection Process

Before commencing PV system installation, submitting the interconnection application to the utility is crucial. Include a single-line diagram detailing proposed system size and point of interconnection. Upon submission, collaborative efforts with a designated utility representative begin. If impact studies are necessary, they’ll assess export limitations or required upgrades.

Guidelines for Acceptance of Single Line Diagrams

An indispensable component for DG installations is the Visible Lockable Labeled AC Disconnect (VLLD), situated between the company meter and DG sources. It features external handles for accessibility and lockability for safety. Molded-case breakers are not substitutes. Proper placement and installation guidelines ensure compliance. Its important to have these pieces of equipment clearly indicated on the SLD submission.

Company Placard Directives

To alert Oncor’s personnel of alternate power sources and ensure their safety near DG installations, caution or warning placards are mandatory. Affix these to the visible AC disconnect, not the company meter. Placard classifications may vary based on distance from the company meter, per Oncor’s Electric Service Guidelines TSN 449260, Sections 700.04.03 to 700.04.05.

For more detailed assistance tailored to your specific needs, we encourage clients to contact us directly. Our team provides expert guidance and support for all your DG projects in the ONCOR region.

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