Search:

Short circuit making current is the actual current that would flow if you shorted the energized conductor to ground. This is determined by the voltage driving the circuit and the circuits total...

I can not say I am familiar with a 208/230 volt system, however, if it is a 120/208 volt system, the readings you have measured suggests that the system is a 120/208 ungrounded Wye or Y system. One...

You total Load is 4 Megawatts and you have a total trnsformation of 4.5 MVA. Based on the transformer capacity of 1.5 MVA at 150% or 2.25 MVA, the priamry current to each transformer is only about...

n=3.125, in this case it is likely referring to the relationship of a circle and square in that the circumference=area and the diameter=side at the number "n". It is referred to as the "Grading...

As I read this question they have given you that P = 16 Newtons of force acting in the direction given by I-2j. Since this sets the direction of the force, P, you get that P is acting at an angle of...

Your transformer has a full closed delta tertiary winding. This winding may be used for a number of applications. For instance by measuring the phase relationship of the circulating current you can...

Your formula is less than clear. If I assume that it is y =2*cos(0.5*x), it becomes a coseine wave form that goes from +2 to -2 in magnitude with two maximums of 2 at o degrees and 720 degrees, one...

I do not have enough details to answer this properly, however, you may have a problem due to the type of load you have on this machine. Electronic controls for generator sets today us zero crossing...

Power Transformers do not usually have a tertiary winding that allows you to use it as an open delta, however, if it did, just as with a full delta, all zero sequence currents are blocked effectively...

Please have it replaced immediately. Have the wiring in that box inspected by a qualified electrican. You may be hearing what is known as an arcing fault.

tkrussell is correct. You need to look at what you total demand might be at anyone time. That is what is the maximum amount of load you expect to have on at any one time. This will suggest a...

Well I tried this out yesterday on my GPS system and it did indeed give ground speed. I was climbing out at about 2000 fps at 150 mph. GPS indicated ground speed at 148 while I was at about 10...

Your question then is really asking if the GPS will show you the speed in the "X" or horizontal direction when in fact the car is moving in both the horizontal and vertical directions. The answer is...

The halogen bulb is basically an tungsten filament bulb and is extremely sensitive to overvoltage. The life is calculated by an exponential function based voltage applied. Please check the voltage...

The GPS system makes its measurements from space based on time, altitude and location of your GPS receiver. Time and location measurements are corrected by ground stations used to corrected for...

Power factor improvement minimizes energy losses, can improve voltage regulation and reduce your electric bill directly if your are charged for power factor.

Hope this helps,

Newton1Law

Since the load presentred by the motor is given as 560 kVA at 0.86 power factor, to get the kW drawn by the motor, it is calculated as follows: 560 kVA * 0.86 = 481.6 kW. Divde this by 3 to get the...

While 6 and 12 phase systems offer advantages in efficiency the cost to convert existing systems does not justify conversion to these systems. (Also, these are not new but were considered many years...

The use of three phase versus single phase in a double story is that three phase allows you to spread the load across more conductors and thus have less voltage drop. Hope this helps, Newton1Law

Often the angle is used to calculate the effective area exposed to the wind. If H/L is 2, then your saying the Height=10' and the length = 5'. The exposed horizontial equalivent perpendicular...

It depends on temperature, air density, vapor pressure, etc. but in general for a 77 degree F day it works out to about 45 to 46 ponds per square inch.

Hope this helps,

Newton1Law

107 km/hour converts to 11.92 psi or 570.82 pitot, Pa or 82.2 kilopascals. This makes some assumptions like air density of 1.2923kg/meter cubed and air temperature of 25 degrees C.

Hope this...

The SF6 gas or course, epoxy or porclein bushings, fiberglass operating rods (internal), and some rubber or vinyl bushings for control wire entrances.

Hope this helps,

Newton1Law

The SF-6 gas used in current transformers perform two functions. One is electrical insulation, the second is cooling. Loss of the SF-6 gas also means that the CT is open to the atmosphere and may...

This installation of a capacitor will only reduce you electric bill if the power company that supplies your power charges you for kVAR-Hours in addition to kWh or if they cahrge you for "power...

Try this WEB page:

Buchholz relay - Wikipedia, the free encyclopedia

BUCHHOLZ RELAY, CONSTRUCTION OF BUCHHOLZ RELAY,DESIGN OF BUCHHOLZ RELAY,ADVANTAGES OF BUCHHOLZ RELAY,DISADVANTAGES OF...

This question could use a little more information from "sijijosek", such as, the operation is on a fully energized circuit breaker or the operation is on a fully deenergized cirucit breaker. If the...

Assumming you are running two new #12/2 cables that you are using to supply two different locations at 120 volts and 20 amps for each, your good to replace the 240 volt, 50 amp circuit breaker with...

Sounds like you receieved a voltage surge from the fault. Did you contact you loacl utility company?

Is this your home or place of business? Do you have a well or are you on city water supply?

If it is your home and you are on a well, it may be your pump is failing, your water table is low to...

Great reference. Thanks.

Phase angle displacement on a transmission line changes due to two factors. One is the characterisitc of the load supplied by the transmission line. The second is due to the "RLC" characteristics...

Depending on where you live you may find that three phase 208 Wye / 120 volt is the normal supply for a Customer. In many Urban areas the normal supply will be from an underground network operating...

I am not familiar with this particular circuit breaker but you may find it listed on the side of the circuit breaker. You will have to remove it from service most likely. Baring that effort,...

A simple circuit to do what you want would be made up of a zener diode and a resistor. If this is going to be a permanent (or long term supply) to the fans then I would suggest an electronic voltage...

Try this WEB page. Many more are available. The splice kits will give you directions on how to apply the splice.

3M Cold Shrink Cable Splicing Kits for Cathodic Protection Cable

Hope this...

Would you please supply more data on the 150 kVA generator. What is the make and model? what is the namplate data given on the machine, i.e. kVA rating or kW rating at some power factor (pf), 150 kW...

PRIMAVERA that I am aware of is a software package used for project management. IS that what you were looking for information on?

I'm sorry Seven, but I can not help you in this area.

KISS has given you the answer but I propose a second alternative. List the devices that you want to measure the energy usage of. Note if they are single phase or three phase. Gather the nameplate...

I need additional information:
1) What amperage or load level in watts does you digital readout system require?
2) Is the supply 50 or 60 hertz (cycles per second)?

A dropping resistor may...

This is an entire EE course, but here is a short answer:

Assume a given value for the meter movements resistance and inductance. These will be shunted (parallelled) by a scaling resistor. In...

When the rating for a generator set is given, the 0.8 you refer to is the rated power factor the machine is designed to supply as the maximum. Therefore, the generator may supply loads with power...

Without additional details, this is hard to answer. If I assume your shunt release is a simple solenoid powered by 220 volts AC at 50 Hz, then I still need some additional information such as the...

What specifically are you trying yo learn? What aspects of frequency and or harmonics are you interested in?

Two questions. 1) Is this light controlled by more than one switch?

2) The Red, Black and White wires are located at the light fixture?

Fire is the concern here. Hire a professional, get the circuits checked as soon as you can. It appears you have at least on faulty switching system on the fan and perhaps the living room as well.

You may want to see this posting on the subject:
https://www.askmehelpdesk.com/electrical-lighting/where-install-grounding-rod-13649.html

Ratings for circuit breaker interrupting capability may be different for different voltage, current and circuit parameters. For most in home, 240/120 volt circuit breakers rated for 200 amps on down...

It depends a little on the system you are trying to measure the maximum damand for. Is it an electrical system, water spply system, goods and services, etc.