I saw a low budget solution, The company simply hug the ceiling tile 12" below the fixtures with a 6" horizontal overlap. This however was for smaller offices.
Best Regards,
Ray Micallef, P. Eng.
Power Generation/Utility Industry
czping
It may effect the cooling and leave the motor more susceptible to contamination. The magnetic circuit is within the stator. If the stator, which is iron holding the windings, is not dissolved it shouldn't effect the operation unless the cooling is somehow compromised.
Best Regards
Ray...
PQ
The manufacturer should have a destruction or failure curve for the cable similar to a fuse curve on a current-time log-log graph. Should be considered when doing coordination study. Some coordination study software provides generic information. If you have the plant coordination study is...
Hello All,
Does anyone know the ANSI spec number for High Voltage Insulation Test Levels for High Voltage Cables? I heard the HIPOT Voltage is now 85 kV for 27.6 kV cables.
Thank You in Advance
Best Regards
Ray Micallef, P. Eng.
Power Generation/Utility Industry
Sounds like your ground is not connected properly or is corroded. Your step and touch potential should be no more than 70 volts. Do not disconnect the ground lead. The frame should be bonded as well. I am not familiar with you model of LA.
Best Regards
Ray Micallef, P. Eng.
Power...
Your probably inducing voltage from a High Voltage line in close proximity.
Lenz's Law? I think?. Mutual Inductance?
Best Regards
Ray Micallef, P. Eng.
Power Generation/Utility Industry
Sounds like you may have a voltage drop problem to the ballast. Check the switch and ballast supply voltage. I don't know if you have the wrong ballast for the installation, the manufacturer will tell you if it is suitable.
Best Regards
Ray Micallef, P. Eng.
Power Generation/Utility Industry
Hello All,
Does anyone know what is required to get a PE designation if one already has a PEng designation in Canada? Is the job market good in the USA for Electrical Power Engineers?
Thank You in advance.
Ray Micallef, P. Eng.
Power Generation/Utility Industry
Sorry Gentlemen, I have tunnel vision at times, Squirrel Cage. The cage alignment within the rotor should be verified. It may be slightly misaligned in relation to the rotor and there may be adjustments.
Ray Micallef, P. Eng.
Power Generation/Utility Industry
It must be an older fan. Most apliances that utilize a two prong plug have no exposed metal pieces hence no chance of shocking the user. The older fan case should not have an electrical connection to either of the two prongs. This can be checked with a continuity meter. If it does either the...
Dadfap has a good idea,
A 100VA apc ups would work well with the right size photovoltaic panels and a radio link back. Motorola makes one.
Let us know what the final design is.
Ray Micallef, P. Eng.
Power Generation/Utility Industry
Vibrations could be caused from electrical issues.
If the airgap is not consistent (when hot) this would cause more rotor deflection.
A shorted or grounded (in 2 or more places) turns in the rotor windings which are a little more common in newer machines cause an uneven field distribution...
Phase unbalance could be a result of rotor alignment. The rotor should be aligned when it is warmed up and running at or close to rated output. When the unit is first synchronized it is common for there to be some unbalance as there is still some sag in the rotor. The alignment is an involved...
Worst posible case: 70 Carts* 9.2A * .6 Serv. Factor / 3 ph=
129A + the rest @ 1 amp (28A) = 160A
Sizing looks good to me.
Ray Micallef, P. Eng.
Power Generation/Utility Industry
