Power and Controls, Inc. Lead Electrical Engineering consultant
firm working as a team member with Rotor Electric and
Motor City Electric during the recent conversion and upgrades
project. Our duties and responsibilities consisted of
performing power system studies for the historic (40)
forty story landmark skyscraper located in downtown Detroit.
The Guardian Building was completed in 1929 and is designated
a National Historic Landmark the highest honor given by
the National Park Services.
The power system studies consisted of performing a short-circuit
study; protective device coordination study and arc-flash
hazard analysis. During the field investigation phase
we assisted with data collection which was challenging
due to the age and size of the building. The power system
is a classic loop system with two incoming utility lines.
Our analysis included three scenarios with normal operation,
tie breaker closed and only one line available.
Upon completion of the analysis we were able to indentify
several opportunities for improvement including reducing
the arc flash hazards at selected pieces of electrical
equipment throughout the distribution system.