High Voltage Power Cable Current Ratings
Electrotechnik Pty Ltd | Electrical Calculations Software
by ELEK Software
2M ago
Table of Contents Introduction The current rating of cables is affected by the installation conditions, the cable system design and the materials and construction of the cables themselves. In this report, a parametric study of the factors which affect current ratings is presented. For cables in air, the effect on the current rating of the following parameters is studied: conductor size, conductor material, sheath bonding arrangement, ambient air temperature, enclosing in the duct, duct size, duct material, exposure to direct solar radiation and separation between groups of cables in air. Fo ..read more
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Conduit Sizing Requirements with Example Calculations
Electrotechnik Pty Ltd | Electrical Calculations Software
by ELEK Software
2M ago
Table of Contents Why Install Cables Inside Conduits? In modern electrical installations, the use of conduits to encase cables offers numerous benefits over direct cable installations. The main reasons for installing cables inside conduits are as follows: Protection against mechanical damage reducing the risk of electrical faults and cable failures. Protection from environmental factors such as moisture, dust, chemicals, and solar radiation. Ease of maintenance and cable replacement. Additional fire protection. Enhanced electrical installation. Cable management and organization. Compliance ..read more
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Conduit Sizing Equations with Example Calculations
Electrotechnik Pty Ltd | Electrical Calculations Software
by ELEK Software
2M ago
Table of Contents Why Install Cables Inside Conduits? In modern electrical installations, the use of conduits to encase cables offers numerous benefits over direct cable installations. The main reasons for installing cables inside conduits are as follows: Protection against mechanical damage reducing the risk of electrical faults and cable failures. Protection from environmental factors such as moisture, dust, chemicals, and solar radiation. Ease of maintenance and cable replacement. Additional fire protection. Enhanced electrical installation. Cable management and organization. Compliance ..read more
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Skin and Proximity Effects on AC Resistance Calculations
Electrotechnik Pty Ltd | Electrical Calculations Software
by ELEK Software
2M ago
Table of Contents Introduction The AC resistance of a cable conductor is always larger than the DC resistance. The primary reasons are ‘skin effect’ and ‘proximity effect’, discussed in more detail below. DC resistance is more readily available than AC resistance because AC resistance depends on variables related to the installation of the cables. Accurate AC resistance is essential for high voltage current rating, voltage drop, fault current, and power loss calculations. The steps for calculating AC resistance for conductors in cables are as follows. The same method is applicable for calcu ..read more
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CYMCAP vs. ELEK Cable HV Software
Electrotechnik Pty Ltd | Electrical Calculations Software
by johnmsemblante
3M ago
Table of Contents The Best Alternative to CYMCAP is ELEK Cable HV Software These software packages have a lot of features. There is a lot to compare. CYMCAP charges for its modules, which are included with ELEK Cable HV. ELEK Cable HV has many of the features included without paying extra These Power Utilities and Government use Elek Cable HV™ Previous Next Comparison Tables: General Feature Info ELEK Cable HV (Professional) CYMCAP IEC 60287 calculations Validated with CIGRE TB 880 ELEK Cable HV is validated with the TB 880 case studies and has matching ..read more
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Achieving Accurate High Voltage Cable Current Ratings
Electrotechnik Pty Ltd | Electrical Calculations Software
by ELEK Software
6M ago
Table of Contents Overview of HV Cable Current Rating Calculations Accurately calculating high voltage cable current ratings is critical to electrical engineering design, ensuring power systems’ safe, reliable and efficient operation. The IEC 60287 standard series provides equations for calculating cable current ratings. This standard continues to be widely adopted because: 1. It is adapted for common cable types and installation methods. 2. It is reasonably accurate, which leads to reliable, current ratings for new and existing cable circuits. 3. It ensures consistency, dependability, and ..read more
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Current Rating of High Voltage Oil-filled Cables
Electrotechnik Pty Ltd | Electrical Calculations Software
by ELEK Software
6M ago
Table of Contents Overview This paper describes the method and has examples for calculating the steady-state current rating of high voltage oil-filled cables buried in the ground. In the example calculation, the cable model has been built in software and the current rating was determined for a buried installation. Oil-filled cable fundamentals Oil-filled cables are a part of the self-contained fluid-filled cable type family. The main insulation for this type consists of multiple layers of paper impregnated with oil (to prevent the formation of voids and the ionisation of these voids during en ..read more
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New Test Carousel
Electrotechnik Pty Ltd | Electrical Calculations Software
by Ahmad Afzal
8M ago
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Wind Farm Earthing Design and Modelling Guide
Electrotechnik Pty Ltd | Electrical Calculations Software
by ELEK Software
8M ago
Table of Contents Overview The typical earthing system for a wind farm is a single integrated (combined) structure suitable for all purposes, including lightning protection, power system fault protection, and telecommunication systems. The WTGs are earthed locally, and a ring electrode is installed for controlling the ground surface voltage gradients close to the foundation. The earthing for the step-up transformers is bonded with the WTG earthing. The screens/earth wires of the collector MV cable/overhead line circuits are earthed at both ends. Bare earth continuity conductors (ECCs) are t ..read more
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Why Crushed Rock is Laid in Substations
Electrotechnik Pty Ltd | Electrical Calculations Software
by ELEK Software
8M ago
Table of Contents Switchyards and substations are an integral part of the electrical generation, transmission, and distribution systems. And they are everywhere; there are for example 55,000 substations in the United States alone. Substations are typically surrounded by security fences, and it is standard to see coarse gravel installed on the ground inside and even outside these confines. There are many misconceived beliefs as to the reasons why gravel is laid in substations. There are in fact two main reasons why gravel is laid inside substations: 1. Improved safety during earth faults an ..read more
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