How do you measure power factor and what do you measure it with. Is there some type of hand held meter that can be used to measure watts as I am told this is really what you are looking for and trying to reduce? What is the optimal location to measure it at, the load or somewhere near the...
Waross,
I will have to go back and take a second look at the nameplate on the generator head to see if it lists anything about the frequency or not. How do I physically determine the number of poles in the generator and from there correlate that to its frequency?
If it is 400 Hz, then is...
I have come across some things I have read that suggest the Navy 120V Delta power runs at 400 Hz. Can anyone comfirm this? I have an old generator that came off of a Naval ship. It was built by Hobart and appears to date from somewhere around the 30's or 40's. It has the same 120V 3 phase...
I did some chassis design work on a fully electric commercial bus. In this case, the two electric motors that are driving the transmission act as generators as soon as you let off of the accelerator pedal. All of this was controlled with simple electronics that sensed that you let off of the...
Has anyone everyone heard of static balancing a crankshaft for a "V" type eingine?
Is it correct that on a 4 cylinder, you only have to match the weights of the pistons and rods to balance the engine? Nothing has to be done to the crankshaft.
What about an inline 6 cylinder where the rod...
Ihave a dry type 3? distribution tranformer with the following specs:
45 KVA
HV: 208? V
LV: 220Y/127 V
How do you get 208V Delta? Is this just the three phases of 208Y/120 V brought in without the neutral? What would be the typical application of such a small voltage increase? Would this...
I working a project where I have to build an apparatus to test air flow rates through small filters. I will be using 3 inch or 4 inch PVC pipe and either a set of orifices or a venturi tube to measure the air flow rates. The air flow needs to have bi-directional air flow capabilities so in the...
The building current has a 200amp single phase service taken off of the 25 KVA transformer that I spoke of at the beginning that feeds the other 3 homes also with 200amp services too. There will not be any cost to me to do this upgrade and I have my choice of 208Y/120 or 240/120 Closed Delta...
This is related to the previous thread from yesterday on Load Calculations.
Current Situation:
One 25 KVA transformer is mounted to the utility pole which serves several homes and the machine shop. As noted in the other thread the three phase choices from the power company are 120/240 CT Delta...
Now I understand for sure how the loads are calulated for the 120/208 wye service. Now if I were to choose the 120/240 CT Closed Delta service, then how do I calculate the loads for this as far as dividing the single phase loads across the incoming legs/phases?
When calculating the load for a building, how do you spread the single and three phase loads over the incoming three phase lines? I belive the correct way for 120/208 Wye is that single phase 208 or 240 loads spread equally across two transformers (A&B, B&C, or C&A) whereas for 120/240 Delta...
