Why You Need DNSP-Approved Grid Protection Units in Australia
If you’re installing a commercial solar system in Australia, the term “DNSP approved grid protection” is more than just a checkbox. Without it, your grid-connected solar project might never get the green light.
Grid protection units (GPUs) are required by every major Distribution Network Service Provider (DNSP) in Australia to ensure the safety and reliability of the power grid. They prevent faults from affecting the main supply, keeping your installation compliant and operational.
DNSP Approval: What It Means and Why It Matters
AS/NZS 61439 Compliance
Every DNSP mandates compliance with AS/NZS 61439 standards for switchboard construction. These standards guarantee:
- System reliability during voltage/frequency fluctuations.
- Durable builds that withstand environmental conditions.
- Safe integration with solar inverters and protection relays.
What happens if your GPU isn't DNSP-approved?
Key Components of a Grid Protection Unit
ABB Grid Relay Technology
Modern protection boards are often built with ABB relays (such as CMD-UFD.M33.M), offering features like:
- Remote monitoring via secure web interface
- Fault memory for rapid diagnostics
- Pre-configured DNSP settings
These relays ensure real-time solar grid disconnection during abnormal voltage or frequency.
Pre-Tested Solar Switchboard Testing (Secondary Injection)
Grid protection units from Pro-tech Switchboards AU include secondary injection testing:
- Tests the accuracy of your protection relay response
- Simulates fault conditions to verify relay triggering
- Essential for DNSP grid connection approval
What is a Secondary Injection Test?
Where Grid Protection Units Are Used
Solar Grid Protection Boards for Commercial & Institutional Sites
DNSP-approved GPUs are mandatory across a variety of solar installations:
- Schools & childcare centres
- Hospitals & aged care facilities
- Commercial warehouses
- Shopping centres & mixed developments
- Apartment complexes & factories
These sectors benefit from the pre-tested grid protection unit Australia-wide for faster approvals and safe commissioning.
Pre-Configured vs. Custom Grid Protection Boards
Plug & Play Models (30kW to 110kW)
Ideal for:
- Rapid installation
- Short procurement cycles
- Single or multiple inverter projects
Available options:
- IP42, IP54, IP65, and IP66 protection ratings
- Sizes: 400×400, 600×600, 800×600 mm enclosures
Fully Custom Solutions
- Tailored to your DNSP’s site-specific requirements
- Optional powder-coating in Electric Orange or Pastel Grey
- Integrated with NHP, Eaton, or Legrand switchgear on request
FAQs
Can I use the same grid protection unit across different DNSPs?
How fast can I get a pre-tested unit?
Can I monitor the GPU remotely?
Compliance & Certifications
All Solar Grid Protection Boards by Pro-tech Switchboards AU are:
- Built to AS/NZS 61439 standard
- Relay compliant with AS/NZS 4777 for grid-tied inverters
- Manufactured under ISO 9001:2015 certified processes
Author Name: Liam Carter
Position: Senior Technical Content Specialist
Company: Pro-tech Switchboards AU
Location: Melbourne, Australia
Experience: 10+ years in electrical switchboard systems, compliance engineering, and industrial automation.
