Performing Series Coordination
Perform a series coordination, as follows:
- On the one-line, select the LV breakers you want.
- Click the arrow below the
Auto Design and select Series Coordination. - On the Home tab, select Window > Auto Design Report. An HTML report is displayed.
The first table in the report describes the breaker that was selected. The second table shows comments on various criteria that were used and various observations made by the program. If the program encounters problems such as lack of a solution, or exceptions, they are listed in the comments. If no solution can be found, then only the comments table is displayed.
EasyPower selects a breaker from the design sheet that selectively coordinates with the downstream breaker.
You can select a single breaker or multiple breakers. If you select multiple breakers in series, the most downstream breaker pair is coordinated first, followed by the next upstream breaker. To select multiple breakers, hold SHIFT and select the breakers.
If you select only the most downstream breaker, there are no breakers with which to coordinate. If you select the most downstream breaker and the breaker upstream to it, both breakers are chosen such that they selectively coordinate.
If a breaker has been previously specified in the one-line and the Trip Amps are defined, then that Trip Amp value is the basis for searching for a selectively coordinating breaker. If the Trip Amps have not been previously defined, the Auto Design algorithm is used to determine the Trip Amps for the breaker.
If there are multiple solutions to series coordination for any breaker, the first breaker listed in the design sheet is selected. The alternative solutions are listed in the Auto-Design report.
Bottom-up approach: Since breakers are selected to coordinate with downstream breakers, it is necessary to solve for lower level breakers first and move your way upstream.
