- Location
- Lockport, IL
- Occupation
- Retired Electrical Engineer
The electrical contractor on a project I recently inherited is questioning a specification requirement, and I can?t blame them for doing so. The spec was published by the US government. The paragraph in question is a standard boilerplate statement, and deals with the ?endurance test? of a variable frequency drive (VFD). Here is the paragraph:
My questions:Immediately upon completion of the performance verification test, the endurance test shall commence. The system shall be operated at varying rates for not less than 192 consecutive hours, at an average effectiveness level of .9998, to demonstrate proper functioning of the complete PCS. Continue the test on a day-to-day basis until performance standard is met. During the endurance test, the contractor shall not be allowed in the building. The system shall respond as designed.
- Has anyone had to perform this ?endurance test??
- Can anyone tell me why the contractor must be kept out of the building during the test?
- Can anyone tell me what ?PCS? means?
- Can anyone shed any light on this testing process?