01
Safe local isolation
Provide a clearly identified DC disconnection point for commissioning, maintenance and emergency procedures.
All applications
01 / APPLICATION
Rooftop Solar
Compact, coordinated DC protection for space-constrained rooftop photovoltaic systems.
01 / SYSTEM CONTEXT
Design around the operating environment.
Rooftop PV systems place protection equipment close to occupied buildings, exposed cable routes and restricted service areas. VIOX helps designers organize isolation, overcurrent protection, surge protection and field connections into a practical DC-side architecture.
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
Compact installation
Select DIN-rail or enclosed devices that fit restricted roof, loft and inverter-adjacent locations.
03
Weather resistance
Coordinate enclosure, cable gland and connector choices with UV, moisture and temperature exposure.
04
Service clarity
Keep protection devices accessible and ratings legible throughout the operating life of the installation.
03 / SYSTEM PATH
From PV field to protected inverter input.
- 01PV modules and string connections
- 02String overcurrent and surge protection
- 03Local DC isolation
- 04Protected DC input to the inverter
04 / RECOMMENDED PRODUCTS
Build the protection chain.
Combine only the functions required by the approved system design. Ratings and device coordination remain project-specific.
08
Branch and feeder protection
03DC Circuit Breaker
Miniature and molded-case circuit breakers for photovoltaic, storage and industrial DC distribution.
PV DC isolation
07DC Isolator Switch
VOD1 load-break DC isolator switches provide dependable photovoltaic circuit isolation up to 1500V DC, with panel, DIN-rail, enclosed and door-clutch installation options.
PV emergency shutdown
04Firefighter Safety Switch
A 1500V DC string-level rapid shutdown switch for safer photovoltaic emergency response, maintenance and rooftop isolation.
PV field connection
02MC4 Solar Connector
PV-MC straight connectors and PV-T2, PV-T3 and PV-T4 branch connectors for reliable photovoltaic module and string wiring.
String protection
01PV DC Fuse
Coordinate fuse isolation and circuit protection for photovoltaic strings, combiner boxes and low-voltage AC equipment with 10 × 38 mm and 14 × 51 mm DIN-rail platforms.
Surge protection
PV DC SPD
PV DC surge protective devices for photovoltaic combiner boxes, inverters and DC distribution cabinets, including the VO-PV40 Type 2 range up to 1500V DC.
APPLICATION ENGINEERING