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I have resently submitted a post on this but I have more information for review. Stated in my resent post we had a contractor read our power factor on each phase. he claims that the power factor in phase A is 50% phase B is 98% and phase C is 80%. The meter he used is a Fluke 43B. The incoming...

thanks, if there is any more info needed let me know!!

We had a contractor put a fluke power quality analizer meter on our main switchgear. The info they recorded was that phase A on our three phase 480volt delta wye system was reading a power factor of 50% lagging and the other phases were reading phase B 80% and phase C 98% lagging. We have a...

I have a micrologix 1200 that is faulting on controller cannot communicate with expansion I/O module. Exact module cannot be determined. This has happened about a month ago and reapeared again today. I clear the error and works fine. The I/O module is 1762OW8. Which has the problem?

rbulsara: At startup and maintance that will have to be performed I know they will turn on all of the heats at once. I know it won't be often but will happen. The 150amp breaker is on the primary side of this transformer and the secondary is not protected. They are using individual CB...

The major question at this point for me is that the "OEM" is stating to me the value of this ONE transformer dry type 480vdelta to 240vdelta is 55KVA. With the value of FLA which they have caculated to be on the 240v side to be 388amps. How can this be 55KVA. I know they took...

Let me rephase my question at my total wattage of 75210watts at 240 volts and the ampacity totalled of theses wattages at 327.14 what would be the proper sized xfrormer size 480 to 240 3phase delta delta and is secondary overcurrennt protection nesacarry

We are installing a new extrusion line and I got schematics from the OEM. The first thing that caught my eye is the value of the xformer. 55KVA primary overcurrent device 150amp breaker. THe values they give me are 388 Fla on the 240v side. Their formula is 388/3phase=129.3anps.So...

I just had a well drilled for a garage and a small appartment on top for a single residence only. The well depth is 500' at this I have 2gpm. The well driller recommend going 500' at approx 350' we had 2 gpm. I assume he went the extra footage for reserve. My question is how much reserve will I...

I have a 220volt service. I put my ampprobe on the neutral and have approx. 15amps. This is a single phase system. On the other 2 phases I have 3amps to 16amps. I know they are not balanced but what is causing the current on the neutral. The neutral is bonded to ground. Thanks you for any...

I have an extruder motor that has rating of 700HP 500vdcARM 300v/150vdc.field 8.9a/17.8 amp field @ 1750RPM. Currently under load we have 800amps on the armature @1750RPM. We are using 300vdc.field EXC Shunt.The manufacture say the motor is capable of 2400RPM. If we purchase a field weaking...