I am working on a job that is replacing an antiquated McCollough loop system with RF transcievers. This is a large site with storage warehouses. Is there a distance limitation to interconnect multiple buildings (FACPs) to a single Transmitter in NFPA. I have been thru both 70 & 72 and cannot...
I have a question about AF C.B. I have a customer (8 yr old >$1 mill house) that is smelling a buning odor in his bedroom and I belive it may be a low level arc either in a device or in a wire. I've suggested installing Arc Fault breakers on the circuits that feed that room to determine if...
I'm working on a design for a base wide RF reporting system for fire alarm. They have existing an old Monaco, Mcollough loop system and a king fisher RF system. I'm trying to find a reliable system to use that can replace the Monaco system and incorperate the king fisher system and be...
I'm working on a design for a base wide RF reporting system for fire alarm. They have existing an old Monaco, Mcollough loop system and a king fisher RF system. I'm trying to find a reliable system to use that can replace the Monaco system and incorperate the king fisher system and be...
I'm considering purchasing a tablet PC and am wondering if Autocad 2002 can be supported with use of the stylus instead of usual mouse cursor. I know that other software supports the writing (like a PDA) and before I spend the money I'm trying to find out any information on the CAD uses. Also...
The whole office just switched over to ACAD 2002 and now I'm havng problems loading up drawings that have x-refs... it is not consistant (about 50/50 chance) but when it does happen it can take upwards of 2-5 min to load a drawing. The scripts I get are as follows
AECBase...
AECArchBase...
Trying to find some reference material on 15 kv switchgear damage curves. I am trying to convince a client to install a partial bus diferential protection and want to quantify the possible damage to the equipment without it.
I'm trying to understand the differnece in operation between a 50/51 and a 67...
I understand that the 67 is a directional device and will only operate if current is in the reverse direction.
My question...what happens to a 50/51 relay when current is in the "wrong" direction?
I'm trying to find a manufacturer of reliable MG sets for power conditioning, can anyone guide me to some good products? Mostly looking for 5-20 kw 50Hz.
I am currently working on a lightning protection scheme for ordnance facility, and are using mil handbook 1004/6 for guidence. Using these equations i find necessary to install 4-75' masts at the building corners, however whenever I do the clearence arc diagram I feel this is overkill and the...
I have a job supplying lightning protection for buildings using 75'-100' steel masts with cabeling strung between them. I'm looking for a manufacturer or refrence material (rember i'm an Electrical Engineer) on windage, guying, bases, size and materials of masts. Any information would be...
I'm trying to find information and codes on 400Hz power for airplane hangers. Can anyone give direction on websites, codebooks or organizations that would have information.
Does the room temp for a 40kw, 50kva 380volt have effect on operation or life of the equipment? Presently it is kept at 55 deg F. Can the temp be raised to lower cooling costs?
Is there a good source for maintenance and safety as well as emergency procedures for 15KV and 5KV metal clad switchgear. Be it online, published or manucacturer offered, any advise on the subject would be greatly appreciated.
