Tools

This page contains a number of engineering tools which have been developed by Orion Technical Services, LLC and are being offered to our customers. If you have any questions or comments on the tools, please let us know by submitting an email through the Contact Us page. Orion Technical Services, LLC makes these tools available without any expressed or implied liability for their use or application.

Click on the tool thumbnail shown below to launch the tool. General help and instructions have been provided below and help and documentation on each of the tools is also available. A copy of the Adobe Acrobat Reader is required to view the documentation. If you do not have a copy, free copies are available on the Adobe website. Click on the link to the right...

Some corporate firewalls have been found to block the download of .cab files. If the tools do not launch properly, please refer to the General Help documentation.

General Help and Instructions:

Tool	Description	Documentation
Complex Number Calculator	A relay engineers dream! This calculator performs mathematical functions on complex numbers in polar or rectangular format. Each number can be entered in the desired format and mathematically combined with another number in another format (ie. rectangular number + polar number). The results are displayed in the format of the last entered number, but can be converted to the other format if desired.
Symmetrical Components Calculator	This is a useful tool which calculates the symmetrical component voltages and currents for a given set of voltage and current inputs. The results are displayed in both a phasor display and tabular format. This tool also serves as a valuable training tool for those not familiar with symmetrical components.
Transformer Short Circuit Calculator	This tool calculates secondary side short circuit duties for transformers. Options are included to utilize a thevenin impedance for the source system or an infinite bus. Different winding configurations can be selected to model the transformer of interest.
Phasor & Power Calculator	This tool plots the phasors for a given set of input voltages and currents. The power quantities (MVA, MW, and MVAR) are also calculated and the power triangle is displayed.
Impedance to TOC Converter	This tool is used to convert an impedance characteristic of an impedance relay to a time-current characteristic for coordinating with overcurrent relays. The algorithm assumes a radial source which is generally a worst case approximation in completing coordination studies.
Arc Resistance Calculator	This tool calculates arc resistance values utilizing two of the more widely used arc resistance formulas.
Per Unit Calculator	This tool calculates per unit values.
Per Unit Base Converter	This tool is used to convert impedances from one per unit base to another. This is particularly useful to convert impedance values specified for transformers.
Bus Span & Deflection Calculator	Here's a useful tool for substation engineers! This tool calculates span lengths and deflections for various bus types and sizes.