What is BS IEC 60287-1-3 - Single-core cables current rating, losses and sharing calculation about?
BS IEC 60287-1-3 provides a method for calculating the phase currents and circulating current losses in single-core cables arranged in parallel.
The method described in BS IEC 60287-1-3 can be used for any number of cables per phase in parallel in any physical layout. The phase currents can be calculated for any arrangement of sheath bonding. For the calculation of sheath losses, it is assumed that the sheaths are bonded at both ends. A method for calculating sheath eddy current losses in two circuits in flat formation is given in IEC 60287-1-2.
Who is BS IEC 60287-1-3 - Single-core cables current rating, losses and sharing calculation for?
BS IEC 60287-1-3 on single-core cables current rating, losses and sharing calculation is useful for:
- Electrical engineer
- Manufacturer of cables
- Manufacturers of single-core cables
- Manufacturer of heavy electrical equipments
- Manufacturer of electrical appliances
- Power Distribution companies
- Electric cable installers and suppliers
Why should you use BS IEC 60287-1-3 - Single-core cables current rating, losses and sharing calculation?
When single-core cables are installed in parallel the load current may not share equally between the parallel cables. The circulating currents in the sheaths of the parallel cables will also differ. This is because a significant proportion of the impedance of large conductors is due to self reactance and mutual reactance. Hence the spacing and relative location of each cable will have an effect on the current sharing and the circulating currents. The currents are also affected by phase rotation.
BS IEC 60287-1-3 provides guidelines to calculate the losses, current sharing between parallel single core cables and current rating. This helps manufacturers understand the cable properties better and produce cables that are more compliant to industry requirements.
Using BS IEC 60287-1-3 to calculate characteristics of cable design can help you manufacture better, safe and reliable products.
