What do you mean by creepage distance of an insulator?
Creep distance is sometimes referred to as leakage distance. It represents the shortest distance along the surface of the insulator between the conductive ends of the insulator. In a typical insulator application, one end would be at an elevated voltage level and the other end would be at a lower voltage or grounded.
What is creep age?
Creepage is defined as the shortest distance between two conductive paths measured along the surface of a solid insulation. The shortest path is typically found around the end of the package body between conductive pins or leads.
What are the different tests done on insulators?
In corrosion test of insulator, The insulator with its galvanized or steel fittings is suspended into a copper sulfate solution for one minute. Then the insulator is removed from the solution and wiped, cleaned. Again it is suspended into the copper sulfate solution for one minute.
What is arcing distance of insulator?
Arcing distance (also called flashover distance): the shortest distance in the air external to the insulator between the metallic parts which normally have the operating voltage between them.
What is clearance and creepage distance of insulation?
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.
What is electrical resistance of insulator?
An ideal conductor would have zero resistance. An ideal insulator would have infinite resistance: it would dissipate no energy, because no current could flow through it.
How do you calculate creepage distance?
How to Determine Creepage Distance for Connectors
- Creepage Distance/Air Gap: The Path of Least Resistance.
- Check the Pins on the Connector Face.
- Check the Backside of the Connector:
- Check Female Contacts as well:
- Check For Hidden Creepage Paths Inside the Connector.
- Check for Hidden Creepage Paths Outside the Connector.
How can creepage distance be improved?
Thinking back to the mountaintop metaphor, one way to increase creepage is to make a valley between the peaks. You can cut grooves or troughs into the PCB substrate to increase creepage. You can also sometimes cut slots all the way through the insulator to increase the distance.
What is the creepage distance of an insulator?
Creepage Distance of Insulator. The purpose of the insulator or insulation is to insulate the electrically charged part of any equipment or machine from another charged part or uncharged metal part. Creepage Distance is the shortest path between two conductive parts measured along the surface of the insulation as shown in figure below.
How to determine the creepage distance of a circuit?
The basis for the determination of a Creepage Distance is the long term r.m.s. value of the voltage existing across it. This voltage is the working voltage, the rated insulation voltage or the rated voltage.
What is creepage distance and why is it important?
Creepage Distance is the shortest path between two conductive parts measured along the surface of the insulation as shown in figure below. When a flashover occurs in the system this distance helps the flashovers not to interfere with the live systems.
How to increase the creepage distance of a pipe?
In most commercial applications we select pollution degree 3 and material group I, however, if you want to assume worse case– use material group IIIb. Creepage distance can be increased by adding an insulated barrier or a slot wider than 1 mm (see diagram). Note that this widget of course is for a preliminary estimation only.