CEE Relays Ltd

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Equipment Evaluation Study Module
The Equipment Evaluation Study module compares equipment ratings with short-circuit and load flow calculations. The program also checks for missing input data and compares continuous ratings to calculated design and operating conditions. Any equipment that fails the evaluation is reported in tabular form and colour-coded on the SLDs. As with all PTW study modules, Equipment Evaluation uses the same project database, integrating all balanced and unbalanced/single-phase study modules, and allowing you to examine existing projects without additional input requirements.

A downloadable version of the Equipment Evaluation brochure is available in PDF format via a link at the bottom of this page. 
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(Above): Check your component ratings before they fail in service!  Small changes in your network and protection settings can make a big difference.
Benefits
  • Helps you design safer and more cost effective power systems. 
  • Reduces mistakes by systematically comparing continuous and short-circuit currents to equipment ratings. 
  • Saves you time by making all de-rating adjustments and by summarising all of the necessary data into a single easy-to-read table. 
  • Saves you time by flagging equipment that is in the marginal range or failed in the rating checks. 
  • Saves you time by running all related studies at once (load flow and short circuit). 
  • Increases flexibility by allowing user-defined criteria for pass/marginal/fail. 
  • Increases flexibility by evaluating short-circuit ratings, continuous ratings, or both. 
  • Communicate designs more effectively with professional reports and annotated SLDs.
(Above): Add a safety margin to your design by choosing "pass" and "fail" criteria for each property of your equipment. 
Interface Options
  • Intuitive graphical interface enables navigation of device type and generation of study results and reports. 
  • Study Results can be printed in a concise Report format or exported to an Excel-compatible spreadsheet. 
  • Choose from Equipment Evaluation Reports and Datablocks or graphically identify equipment that fails the evaluation in a colour-coded SLD. 
  • Clear and concise reporting of all equipment in a system enables easy diagnosis of potential problems. Sort results by device type, status, bus, voltage, rating, and more. 
  • Input data evaluation and reporting to identify missing data or errors in input data
Study Options
  • Continuous Rating checks calculated load flow against ratings of cables, transformers, transmission lines, buses, generators, protective devices, panels, and protective devices on individual panel circuits. 
  • Short-circuit interrupting and withstand rating checks for protective devices, buses and schedules. 
  • Choose between balanced and unbalanced study results, protection and non-protection device types. 
  • Choose between bus or branch fault study results from ANSI, IEC, or comprehensive fault analysis methods for evaluation. 
  • Equipment evaluations can be performed based upon used-defined limits or system defaults
(Left): Each problem criterion is labelled with an asterisk "*".  The example shown is a cable whose full-load current has been exceeded in the model.  There are other "fail" and "marginal" calculations as well, based on user-selected tolerances for volt drop, current carrying capacity etc.
A downloadable version of the Equipment Evaluation brochure is available here.
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