I'm doing some arc flash calculation for a client on a 12kV-480V substations because the NFPA70E table has notes that indicate that the table will not apply to that application. Unfortunately, the result of the calculations indicate that the face and chest of the personnel operating the infrared scanner must be approximately 10' away from the energized bus with the highest category PPE (level 4). I'm not sure how they will perform the test, maybe with the camera duct taped to a hookstick, but that sounds more dangerous than having the guy stand there and do the test himself.
The main reason for the high incident energy is the lack of instantaneous protection upstream, only 51 relays and CB's with LS characteristics only.
[This message has been edited by Ron (edited 07-14-2004).]
Re: Work? I Can Barely Move!#117871 07/17/0408:14 AM07/17/0408:14 AM
The first time the ir guys came to our plant we got to go along and watch. One of our guys almost earned a darwin award when tried to point to breaker in a 480 panel that was avery sexy orange. Fortunately someone grabbed his arm.
Re: Work? I Can Barely Move!#117872 07/17/0410:15 AM07/17/0410:15 AM
mvp, I'm constantly swating peoples hands away from panels! They go to point at something & they think they need to go in & touch things... I've gotten to the point where I carry a small fiberglass "pointer" stick that I'll hand off if they wanna point to something
Re: Work? I Can Barely Move!#117873 07/17/0401:18 PM07/17/0401:18 PM
Hi everyone. My first time posting on the board. The picture that started this is my partner. The suit costs our company just under $2000.00. We do not use this level of PPE often. Very hot and difficult to work in.
I also have people wanting to point and touch equipment. What are they thinking?
Re: Work? I Can Barely Move!#117874 07/17/0401:25 PM07/17/0401:25 PM