PROTECTIVE DEVICE COORDINATION ANALYSIS
We offer arc flash risk assessment in all 50 states!
R&R Electric 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
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)