We offer arc flash risk assessment in all 50 states!

EDS can provide Protective Device Coordination Analysis in accordance with IEEE std 242-2001; Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems (Buff Book), and in accordance IEEE std 399-1997; Recommended Practice for Industrial and Commercial Power Systems Analysis (Brown Book). Coordination time-current characteristic curves are prepared to determine the required settings/sizes of the protective devices to maximize selectivity and safety with Arc Flash Hazards in mind.

The coordination curves are prepared on log-log paper to illustrate adequate clearing times of devices. The curves depict actual protective devices installed, based upon Easypower’s® device library of manufacture curves, in order to ensure proper coordination.

Curve Sheets Shall Contain, But Not Be Limited To The Following:

• Device Identification and associated settings/size
• Current multiplier
• Cable insulation damage curves
• Single line for the portion of the system
• Voltage at which curves are plotted
• ANSI frequent fault damage curve
• ANSI frequent fault damage curve
• Motor Starting Profiles (Where Applicable)