A comparison between XLPE and EPR as insulating materials for HV cables
Let us compare crosslinked polyethylene (XLPE) and ethylene propylene rubber (EPR) as insulating materials for high voltage (HV) cables. Both XLPE and EPR have their merits, and the choice depends on specific requirements and application conditions. While XLPE dominates due to its ease of handling, EPR offers flexibility and reduced thermal expansion. Keep these factors in mind when selecting...
Posted in Design / Protection on July 18th, 2024
Electrical Protection Fundamentals
There are different protection techniques and principles. Fuses are the simplest and cheapest technology. After operation, however, fuses are required to be manually replaced to restore protection features. Protection relays are applied if fuses are not feasible. There are different protection relays, require different inputs, and process the information differently, but the main objective of all protection relays is...
High Voltage Arc Flash Assessment and Applications Part 2
Part 1 of this article, which was the cover story in the previous issue of NETA World, explored the need for high-voltage arc flash (HVAF) assessment to protect utility workers who are exposed to voltages above 15kV.It also compared various methods to calculate the incident energy from HV and MV electric arcs. Analyzing the results demonstrated that several...
High Voltage Arc Flash Assessment and Applications
Arc flash assessment based on IEEE 1584 has limitations with respect to the voltage. The voltage range applicable to IEEE 1584-2018 remains unchanged at 208V through 15kV. Low voltage range is now 208V through 600V.
Protecting utility workers and other working personnel who are exposed to line-to-line voltages above 15kV at live electricity installations is critical. For this reason and...
Posted in Design on July 3rd, 2024
Heat Dissipation in Sealed Electrical Enclosures
Heat dissipation in sealed electrical enclosures is a critical consideration in the design and operation of electrical or electronic systems. Effective heat management ensures the reliability, performance, and longevity of the components inside the enclosure.
Key aspects and methods to consider
- 1. Heat Generation
- Electronic components generate heat during operation. The amount of heat depends on the power consumption and efficiency...