What is IEC 60664 1?
1 This part of IEC 60664 deals with insulation coordination for equipment within low- voltage systems. It applies to equipment for use up to 2 000 m above sea level having a rated voltage up to a.c. 1 000 V with rated frequencies up to 30 kHz or a rated voltage up to d.c. 1 500 V.
Is standard for insulation coordination?
82.1-2010 – IEEE Standard for Insulation Coordination–Definitions, Principles, and Rules. Revision of IEEE Std 1313.1-1996. The procedure for selection of the withstand voltages for equipment phase-to-ground and phase-to-phase insulation systems is specified. This standard applies to three-phase ac systems above 15 kV …
What is the difference between clearance and creepage?
Clearance is the shortest distance in air between two conductive parts. Creepage distance means the shortest distance along the surface of a solid insulating material between two conductive parts.
What is pollution degree?
Pollution degree is a classification according to the amount of dry pollution and condensation present in the environment. This classification is important since it affects creepage and clearance distances required to ensure the safety of a product. Temporary conductivity caused by condensation is to be expected.
What is insulation coordination?
Insulation coordination is the process of selecting the most cost-effective equipment dielectric strength and its application to avoid equipment insulation damage or affect continuity of service.
What is the basic insulation level?
Definition: A design voltage level for electrical apparatus that refers to a short duration (1.2 x 50 microsecond) crest voltage and is used to measure the ability of an insulation system to withstand high surge voltage.
What is longitudinal insulation?
longitudinal insulation is exposed to a lower overvoltage than the phase-to-earth insulation. Line/cable switching overvoltages may be limited through the use of: (a) pre- insertion resistors on the circuit breakers; (b) controlled closing of the breaker, or (c) surge arresters.
What is leakage distance?
Leakage distance is defined as the shortest path on the surface of an insulation material over which leakage current may flow.
What is electrical clearance?
The electrical clearance is the electrical isolation between two conductive components, whereas the creepage indicates the conduction of electricity across the surface of a nonconductive component. The clearance and creepage distance are two important parameters while designing an electrical assembly.
What does creepage mean?
gradual movement
Definition of creepage : gradual movement : creep.
How do you measure 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.
0