Clients and regulatory authorities now expect proof that calculations have been carried out to the standards of the IEE 17th Edition. Wiring allows you to offer this evidence and helps ensure you produce a cost-effective and electrically efficient layout. Unlike other vendors there is no limit to the number of boards and loads the engineer can enter.
The distribution system is built up by placing elements representing boards, loads and cables, directly onto the screen. These elements are far more than just symbols - they hold data describing their characteristics entered by you. For example, the cable type and installation method or the load on each way and phase.
The Engineer can coordinate the power distribution schematic with the floor plan based Cymap Electrics program. This entails importing the distribution boards set up on the floor plan with all cable lengths and loads determined from manufacturer’s luminaires and loads placed. This saves time setting up boards in the Cymap Wiring program.
A full analysis of the system is available as soon as a functioning layout has been described, so within a few minutes of starting the design you can be looking at calculated cable sizes and volt drops, earth loop impedance checks, CPC sizing, discrimination studies and breaker sizing as well as full schedules of rates.
To modify the system simply click on the item to alter and enter the revised values. Recalculation is instant, with cable sizes and other results displayed either directly on the layout or in easy to read schedules.
Cables can be controlled in various ways:
The size may be fixed. They can be set in parallel, and various de-rating factors can be determined. Over 285 types of cable are available in the database provided, including IED 17th Edition cables and those based on ERA installation methods.
CPCs can take various forms: core in cable, using the armouring or the conduit. Alternatively you can choose to run a separate earth.
Protection devices, including HV devices, MCBs, MCCBs, air circuit breakers and electronic devices are available from many manufacturers and can be modified or added to by the user. RCDs can be included and either fixed in size or sized automatically by the program to ensure discrimination. Diversity can be entered at any point in the system.
Loads, cable sizes, protection device sizes, volt drops, short circuit fault levels and earth loop impedances are calculated for every point in the system. In addition, disconnection times are calculated, adiabatic and other checks are made to help ensure compliance with the IEE 17th Edition. Full de-rating and single cable sizing form part of the minor suite of programs included.
The description of final circuits is an integral part of the Wiring package. As each element of the final circuit is entered the total load on the way is updated, the protection device size is calculated and the numerous checks required by the IEE regulations are carried out. Six types of final circuit are identified to cover the full range of possibilities: lighting, standard sockets, special sockets, cooking, stationary equipment and spare capacity. Loads may be either single phase or three phase.
Where there are a number of similar boards in a building - for example, the lighting on identical floors of an office block - the complete contents of one board can be copied to another. This is in addition to being able to copy, move and swap individual ways within a board. The ability to select whole sections of one project and paste them into another is also a useful feature.
Discrimination between protective devices is automatically checked each time a calculation is performed and any problems reported. A full co-ordination study can also be carried out, taking into account the tolerances of the device and enabling you to alter the settings of adjustable devices, while viewing their fault/time curves on screen. HV devices can be included on the upstream HV side of the power distribution network. Full adjustment of all devices is possible by selecting the appropriate device curve and changing the device settings.
A full database of manufacturer’s devices is included along with impulse voltages which can be used for analysis of protection of atmospheric or otherwise over voltages which require surge protection.A separate Discrimination Co-ordination package forms part of the extensive range of circuit protective devices enabling engineers to create a simple discrimination study by selecting devices on a tabular format and viewing the results. This is particularly suitable for existing networks where obsolete breakers need replacing without resorting to a complete modeling of the power distribution network.
Harmonic analysis is a feature that can be applied if necessary to analyse tripleN harmonics created in today’s electrical environment at a distribution board level.
There are no limits to the number of boards and loads added to the schematic system, so the software can be used to cover the vast majority of projects from domestic to major commercial.
A wide range of customisable reports can be printed, including all aspects of design and schematics, final board diagrams, a bill of quantities, and commissioning test sheets. As an accredited supplier, appropriate BS5750 and BS7671 output documentation is provided.
Diagrams can be printed, plotted directly or exported to a draughting system such as AutoCAD for further enhancement. System details can be exported in a format suitable for spreadsheets, word processors, and estimating systems.
User friendly and with the ability to copy and paste individual boards, groups of boards or even whole sections of one project into another makes life easier for the engineer wishing to add projects together.
Click here to download information about Cymap 17th Edition Electrical Software.