Protective Device Coordination AnalysisWe 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
- Transformer inrush point
- Motor Starting Profiles (Where Applicable)