About What does creepage distance of photovoltaic panels mean
Creepage is the shortest path between two conductive parts (or between a conductive part and the bounding surface of the equipment) measured along the surface of the insulation.
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6 FAQs about [What does creepage distance of photovoltaic panels mean ]
What is the difference between clearance and creepage?
Clearance: In the "line of sight" distance or the shortest air path between two conductors. The shortest distance that can achieve insulated through the air. Creepage: The shortest distance between two conductors along the insulating surface. Creepage must be greater than or equal to clearance. 2.2 Important factor in determining distance
Can creepage distance be specified if conductive pollution is present?
The dimensions for creepage distance cannot be specified where permanently conductive pollution is present (PD=4). For temporarily conductive pollution (PD=3), the surface of the insulation may be designed to avoid a continuous path of conductive pollution, for example, by means of ribs and grooves.
What are creepage and clearance distances?
Creepage and clearance distances not only apply to the PCB, but also to the components (especially magnetic components) that are mounted on the PCB. It is also important to note that as working voltage, pollution degree, overvoltage category, and altitude increase, both the creepage and clearance distances also increase.
Why do PCB design engineers use creepage and clearance distances?
Design engineers, especially printed circuit board (PCB) designers, are often not aware of the reasons for using creepage and clearance distances. Selecting the appropriate tables in the standard and applying them properly to a design are key to avoiding problems later.
What is the required creepage distance for Basic insulation?
Assuming pollution degree 2 and material group IIIb, the required creepage distance for basic insulation would be 3.5 mm using linear interpolation. For reinforced insulation, the values for creepage distances are double the values provided in the table for basic insulation.
How is creepage measured?
If the width of the groove is greater than or equal to X mm, the creepage distance must be measured along the groove contour. The path under consideration includes parallel or converging-sided grooves with any depth and width less than X mm. The clearance and creepage are directly measured across the groove.