Iec hv cable sizing pdf

A high voltage insulated cable circuit consists of three singlecore cables or one threecore cable with high. Feb 09, 2018 in case of lv system cable can be selected on the basis of its current carrying capacity and voltage drop but in case of mv hv system cable short circuit capacity is an importantdeciding factor. Iec 60364552 2009 electrical installations in buildings part 552. Ieee std 525 2007 revision of ieee std 5251992incorporates ieee std 5252007cor1. Sizing conductors and selecting protection devices legrand. Iec 60287 calculation of the continuous current rating of cables 100% load factor is the international standard which defines the procedures and equations to be used in determining the current carry capacity of cable.

Economic optimization of power cable size iec 603001. Iec 60287 current capacity of cables rated current by steven mcfadyen on february 18th, 20 this note looks at the formulae used to calculate the rated current capacity of a cable in line with iec 60287 calculation of the continuous current rating of cables 100% load factor. Iec 60502 cable global cables and cable accessories supplier. Ieee guide for the design and installation of cable systems in substations. A methodology for optimum sizing of offshore wind farms high voltage ac export cables is presented. Now, calculate the current that will be running in the circuit due. Technical specifications for ehv 110kv power cables.

Introduction this reference is intended to give a basic overview of insulating materials that can be used during high voltage withstand testing, in particular cable testing. High voltage terminal boxes 01 high voltage terminal box. Cenelec guide r064003 gives a rigorous calculation method suitable for calculation software. Nec nfpa 70 2011 national electricity code is the equivalent standard for iec 60364 in north america and includes a section covering cable sizing in article 300. Hv cable sizing software in compliance with iec temperature rise and cable losses of high voltage power cables under multiple scenarios and installation high voltage cables prysmian group high voltage systems 04 high voltage xlpe cable production since the introduction of polymeric insulation, we have made an important contribution. In view of sizing an lvhv electrical installation and the associated cable cleats, accessories and electrical equipment, as well as determining effective protection of both life and. A high voltage insulated cable circuit consists of three singlecore cables or one threecore cable with high voltage sealing ends at each end.

International electrotechnical commission publication iec 20a, 1978. This calculation also could be used to determine the selection of the cable size for the high voltahge hv cable and the conductor could be copper or aluminium. An example how to calculate voltage drop and size of. On high voltage circuits the prospective fault current and backup protection time is typically used i. At brugg cables, professional computer programs are in use for the calculation of the various cable. Cable layout and system design the dimensioning of a high voltage cable system is always based on the specifications and demands of the project at hand. Control cable for high voltage ss laid in a cable tray in a trench, is it a must to be armored or not, and what does iec said in this issue. Prysmian cable cleats prysmian cleats hv 11kv 33kv. Cable high voltage electrotechnik pty ltdelectrical. In accordance with icea, iec, ieee and other power cable consensus standards, testing can be performed by means of direct current, power frequency alternating current, or very low frequency alternating current. Then, v is the cable rated voltage between phase conductors, expressed as. The current carrying capacities shown in the electrical characteristics tables are calculated according to the internationally adopted method of the iec publication 60287 for a maximum core temperature of 90. The documents are available free of charge in pdf format. Testing and commissioning of extra high voltage cables 110kv consisting of.

The reporting function also provides a concise record of the cable size calculation work performed. So in case of ht motor, the cable short circuit cap. The cable sizing calculator considers current rating, voltage drop and short circuit current according to the iec 60364 and hd 60364 standards. Abb has always been a pioneer in the high voltage field and we have many.

Cma power cables paper insulated, lead and aluminium sheathed cables up to 1933kv dated 12287. Cable short circuit capacity should be higher than system short circuit capacity at that point. Other than that, you could try system analysis software like etap. There is also complicated software that develops by abb that could be used to determine the fault current and cable size. This guide is not intended for use in the design of wire and cable systems in generating stations, which is adequately covered in ieee std 4221986 and ieee std 6901984. Gridcablemax hv cable sizing software made for engineers. Optimum sizing of offshore wind farm export cables. On trays or racks hv cables shall be segregated from the lv cables. Perform a shieldcontinuity test on each power cable. Requalification testing is carried out on a regular basis with installed components. For example if you are calculating the size of cable for a 1 kw single phase pump. Iec 60840 or iec 62067 metal wire screen when a layer of copper wire screen is required, it shall be applied over the insulation screening. Raychem high voltage cable accessories up to 245 kv.

Hi, i am hoping someone might be able to offer some opinions. Iec, nec, bs, etc and some standards emphasise certain things over. This document has been developed as a guide for the design, installation, and protection of wire and cable systems in substations with the objective of minimizing cable failures and their consequences. Cable sizes are typically decribed in terms of crosssectional area, american wire gauge awg or kcmil, depending on geographic region. Catalog high voltage engineered induction motors technical. I found it to be an invaluable tool that guides my high voltage cable designs, as it is easy to use and quick to modify a design. Power cables with extruded insulation and their accessories for rated voltages from 1kv to 30kv iec 60702. Allentown, pa abstract more and more substations are retrofitted with numerical relays, meters and monitoring devices. These design requirements can be userdefined or automatically determined from short circuit and protective device calculation results. Xlpe cable systems specified according to iec international.

Testing of hv cables supplementary information page 1 of 24 reference sp0407r02 ver 2 ergon energy corporation limited abn 50 087 646 062 1. For medium voltage cables, the calculations will be according to iec 60502. High voltage xlpe cable systems technical user guide. Ieee guide for the design and installation of cable. I use cable hv to calculate the permissible current rating of cables under different installation configurations. Iec xlpe cable systems specified according to iec international electrotechnical commission are among many other standards accepted. V v3 v0 the exact rated voltage selection of power cable depends on earth fault withstand limits and specifications considerations that are made by the power system designers. Cablesizer cable sizing calculations to iec and nec standards. Cable sizing software cable sizing calculation etap. I will be carrying out a lot of cable calculations ratings, pulling tensions etc.

Etap cable sizing module considers zero sequence triple harmonic constraints as well as other harmonic constraints based on correction reduction factors for other order of harmonics. I have tried grid cable max and heard of an autralian project called cable calc pro. I have seen in some cable sizing document that we should apply 1. As per iec standards following three classifications exist. The standard is applicable to all alternating current voltages and direct current cables up to 5kv. All raychem high voltage cable accessories products are subjected to extensive testing from the time they enter our plants as raw material until they leave as finished products.

Lt cable sizing cable size calculation pdf cable size calculation wire size ampacity chart mv cable sizing calculation pdf cable size calculation formula pdf. Medium voltage technical guide electrical engineering portal. Isbn 9780738155296 stdpd95629 no part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior. Iec 60287 current capacity of cables an introduction. Dnvglst0359 edition june 2016 subsea power cables for wind power plants.

Is 7098 p3 or iec 60840 or iec 62067c radial water barrier lead alloy sheath is very. Most often, the older relay gets replaced with a newer relay with the rest of the installation such as current transformer ct and lead. Iec 60287 current capacity of cables rated current. Hv and lv single core cables shall be laid in trefoil groups with 150 mm clear spacing between trefoils. These sealing ends are also called terminations or terminals. Olex cables high voltage xlpe insulated cables 0882.

Now, we can consider these four points one by one and choose a cable which complies all these requirements. The method uses as main input sitedependent time series of wind power generation and seabed temperature, in order to apply dynamic temperature estimation dte analysis using a thermoelectrical equivalent model tee, followed by an estimation of lossoflife fractions in the insulation. A global solutions provider, prysmian offers a wide range of integrated. Typical iec wiring specification cable markingnumbering cable numbers shall be marked on the cables along their routes and at both termination points. How to calculate size of a cable for 11kv or 33kv line zxpress.

Iec 60183 guide to the selection of highvoltage cables iec 60502 power cables with extruded insulation and their accessories for rated voltages from 1 kv um 1,2 kv up to 30 kv um 36 kv iec 60840 power cables with extruded insulation and their accessories for rated voltages above. Cable voltage drop should be less than defined voltage drop. Cablesizer cable sizing calculations to iec and nec. Selection and erection of electrical equipment wiring systems is the iec standard governing cable sizing. This will help you with the calculations, and they have a cable pulling module although i have not used that particular module. For the use of this standard, high voltage see iev 601. Iec 60183 guide to the selection of highvoltage cables iec 60502 power cables with extruded insulation and their accessories for rated voltages from.

The hv cbale size shall be base on the fault level on hv side. The cable is fed from the bottom of the reel so that its curvature is continuous with no reversed bends. Cable sizing groundingpe etap cable sizing for groundingpe conductor provides various options which can be used as design requirements. Etap also has an iec 60287 thermal calculation module should you need it. Cable or conductor sizing is the process of hv cable sizing scribd. Figure f2 cable feed into conduit at floor level c from cable reel to cable tray, the cable is fed from the top of the reel to maintain required curvature. Multicorecables on racks or trays may be bunched in a maximum of two layers. How to calculate size of a cable for 11kv or 33kv line. Cable sizing calculator iec 60364 and hd 60364 jcalc. One or more layers of suitable separator binder tape may be applied helically over the screen as applicable.

The following details are required for calculation. Cable or conductor sizing is the process of selecting appropriate sizes for electrical power cable conductors. Customers can therefore have full confidence in the products, services and data. All non electrical type tests as required by iec 60502 routine tests routine tests are carried out on each finished length of cable to control the overall quality of the.

During this phase, it is important to carry out calculations that assist in making the decisions and determine future performance. Cable calculation software mvhv specific iet engineering. Eland cables is a leading supplier of power cables to british, european and international standards, including iec 60502. Cable sizing methods do differ across international standards e. Also, check out our blog for news and discussion on cable sizing. In case of lv system cable can be selected on the basis of its current carrying capacity and voltage drop but in case of mvhv system cable short circuit capacity is an importantdeciding factor. Local and historical factors play a part, and limits are usually between 30 and 100 kv see iev 6010128. Cablesizer is an automated cable sizing and design calculation tool to iec and nec standards. When the length of the circuit exceeds the capacity of a cable reel, joints are used to connect the unit. The calculation of cable rating follow t he derating factor method, see cable derating factors.

Part 1 does not contain any current capacity sizing, as this is intended to be covered by iec 60364. Ieee guide for the design and installation of cable systems. Dnvglst0359 subsea power cables for wind power plants. For technical support with your iec standard cable requirements, contact our technical engineers who have vast experience with their designs, manufacture and testing. No signups or logins required, just click below to start sizing to either nec or iec standards. Iec 60332 tests on electric and optical fibre cables under fire conditions iec 60502. Gridcablemax is a user friendly program that determines cable ratings with total accuracy. For underground cabling, the spacing between cable numbers along the route should not exceed 5 m, and for above ground cabling, 25 m.