01
Defined string architecture
Match combiner inputs, output circuits and cable routing to the inverter MPPT arrangement and approved single-line diagram.
All applications
02 / APPLICATION
Commercial & Industrial PV
Structured DC collection and protection for larger rooftops, multiple arrays and demanding operating environments.
01 / SYSTEM CONTEXT
Design around the operating environment.
Commercial and industrial PV projects combine higher string counts with longer cable routes, multiple inverter zones and site-specific shutdown requirements. A coordinated protection plan reduces ambiguity between the array, combiner equipment and inverter DC inputs.
Final selection must follow the approved electrical design, applicable standards and site conditions. VIOX product references provide a structured starting point for engineering review and quotation.
02 / DESIGN PRIORITIES
What the DC protection plan must resolve.
02
Protection coordination
Confirm fuse, breaker and SPD ratings against calculated voltage, current, fault level and local installation rules.
03
Operational continuity
Segment the array so inspection or a localized fault does not unnecessarily interrupt the full generating system.
04
Project documentation
Align labels, drawings, component schedules and inspection records before production and site delivery.
03 / SYSTEM PATH
From PV field to protected inverter input.
- 01Multiple rooftop PV strings
- 02Zoned combiner and surge protection
- 03Feeder isolation and DC distribution
- 04Commercial inverter inputs
04 / RECOMMENDED PRODUCTS
Build the protection chain.
Combine only the functions required by the approved system design. Ratings and device coordination remain project-specific.
01
System integration
02PV Combiner Box
Bring PV string inputs together with organized protection, isolation and monitoring options.
Field connection
03MC4 Solar Connector
Create consistent cable connections across photovoltaic modules, strings and field wiring.
Branch and feeder protection
04DC Circuit Breaker
Miniature and molded-case circuit breakers for photovoltaic, storage and industrial DC distribution.
Module-level safety
06Rapid Shutdown Device
Reduce photovoltaic array voltage rapidly for emergency response, servicing and code-driven shutdown requirements.
Safe isolation
07DC Isolator Switch
Provide a visible and dependable means of disconnecting photovoltaic DC circuits.
String protection
08PV DC Fuse
Coordinate fault protection for photovoltaic strings, arrays and DC equipment.
Surge protection
PV DC SPD
Help protect photovoltaic DC equipment from transient overvoltage events.
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APPLICATION ENGINEERING