Theory

Cyclic loading with daily, weekly, and yearly load factors
Cyclic loading with daily, weekly, and yearly load factors

Posted on 2016-08-16
Using the Neher McGrath method for the calculation of the rating of buried cables under cyclic loading conditions allows for a daily, weekly, and yearly load factor in the same calculation.

Variation of spacing between sheath bonding points
Variation of spacing between sheath bonding points

Posted on 2016-07-03
For single-core cable circuits with sheaths solidly bonded at both ends and possibly at intermediate points, the circulating currents and the resulting losses increase as the spacing increases,...

Magnetic field with phase splitting
Magnetic field with phase splitting

Posted on 2016-06-26
Phase splitting can be used to drastically reduce the magnetic fields of buried power cables. Also, the conductor cross-section can be less than half because the current is only half per split...

Cyclic loading
Cyclic loading

Posted on 2016-06-06
For the calculation of the rating of buried cables under cyclic loading conditions two main methods are used: The method according to IEC 60853 and the Neher McGrath method. The following post...

Magnetic fields
Magnetic fields

Posted on 2016-02-22
Cableizer calculates the magnetic fields of multiple systems with different frequencies and load-flow directions. The magnetic field strength is diagrammed as impressive and meaningful...

Three-core cables belted or screened
Three-core cables belted or screened

Posted on 2015-12-14
Modelling and calculation of the internal thermal resistance and ampacity of 3-core belted cables and screened cables with fillers.

Armour losses and double-layer armour
Armour losses and double-layer armour

Posted on 2015-11-20
The IEC standard 60287-1-1 describes methods to calculate the armour loss factor but does so for one layer of armour only. Other ampacity calculation programs allow the user to model as well only...

Drying-out of soil with multiple systems
Drying-out of soil with multiple systems

Posted on 2015-11-02
The method described in the IEC 60287 standard to calculate buried cables where partial drying-out of the soil occurs is limited to a single isolated cable or circuit only. Cableizer introduced a...

Soil Temperature Calculator
Soil Temperature Calculator

Posted on 2015-04-20
The online soil temperature calculator is based on a simplified mathematical model describing the expected temperature curve in the soil. It is especially useful to estimate the maximum soil...

Calculation of internal thermal resistances of multi-core cables
Calculation of internal thermal resistances of multi-core cables

Posted on 2015-03-27
Interpretation and generalization of the calculation of the thermal resistances of the constituent parts of multi-core cables, as defined in IEC 60287-2-1.

IEC 60287-2: Calculation of thermal resistances of electric cables
IEC 60287-2: Calculation of thermal resistances of electric cables

Posted on 2015-03-18
This blog post discusses the topics covered by IEC standards 60287-2. It specifically emphasizes where and why Cableizer is deviating from the standard.

IEC 60287-1: Calculation of current rating and losses of electric cables
IEC 60287-1: Calculation of current rating and losses of electric cables

Posted on 2015-03-11
This blog post discusses the topics covered by IEC standards 60287-1. It specifically emphasizes where and why Cableizer is deviating from the standard.

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