NFPA-70E Arc Flash Hazard Studies

Arc Flash Analysis Studies are required to ensure that maintenance personnel are aware of the hazards and can take proper precautions before working on live electrical equipment. An arc flash can occur when phase conductors come in contact with one another or ground…read more

Short Circuit (Fault) Studies, ANSI C.37 and IEC 909

Short Circuit (Fault Current) studies are required to insure that existing and new equipment ratings are adequate to withstand the available short circuit energy available at each point in the electrical system. Fault currents that exceed equipment ratings are capable of extensive equipment damage and are a serious threat to human life and limb…read more

Coordination of Protective Devices

Protective Device Coordination studies are required to insure the safety of the public, working personnel and that equipment is not damaged under fault conditions per the requirements of NEC 110-10. Analysis of TCC (Time Current Characteristics) data for the protective devices and equipment such as transformers…read more

Load Flow and Voltage Drop

The Load Flow and Voltage Drop study is the most basic and commonly needed electrical study. The Load Flow study will show the power in kVA or Amperes that is being handled by all of the individual electrical components, e.g. transformers, conductors and panels in the system. This allows a determination of equipment rating margins and reserve capacity loading percentage…read more

Transient Motor Starting

Starting large motors can cause disturbances to the motor and other loads on other buses. In the worst cases the starting motor may stall and be unable to start the driven load. In general, a motor starting study should be made if the motor’s horsepower exceeds approximately 30% of the supply transformers base kVA rating…read more

Harmonic Analysis (IEEE 519)

Harmonic Analysis Studies are required to insure that problems will not be introduced into the electrical distribution system due to non-linear loads. Loads which draw a non-sinusoidal current when a sinusoidal voltage is applied is defined as non-linear. The increased use of electronic power devices, which chop or abruptly switch power, introduces harmonics to the power system…read more