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Industrial Electricity and Electronics
Industrial electricity and electronics refers to a trade which involves electrical wiring for residential, commercial and industrial applications. Strategic placements of wires and logic-boards installations are part of this profession.
525 Questions
How many watts does a light bulb need to be to make eggs hatch?
You need an hen to hatch the egg not the bulb. Jokes apart if you want simulate warm condition suitable for an egg to hatch, you need to first know the right temperature required to hatch an egg. Then you need to get a suitable incandscent bulb of suitable wattage. It may be little higher than the body temperature of the hen.
In what operating temperature does the light bulb withstand?
Incandescent light bulbs typically withstand operating temperatures between 200-250 degrees Celsius. LED light bulbs, on the other hand, can operate at cooler temperatures and are more energy-efficient. It is important to check the manufacturer's recommendations for specific light bulb models.
Why do insulators not conduct electricity well?
In insulators the bond energy between atoms in the material they form is very high. We need to give large energy to overcome that bond energy and set free the electrons.
As electrons are not freely available It doesnt conduct well.
There's a kind of circularity in the question. Anything that doesn't conduct electricity for any reason is called an insulator. So any substance where the electrons are too tightly bound to atoms and cannot migrate is called an insulator. Anything that manages to let electrons migrate wouldn't be called an insulator.
How do power technicians work safely with electricity?
Power technicians work safely with electricity by wearing protective gear such as gloves, goggles, and insulated clothing. They follow strict safety procedures, including de-energizing equipment before working on it, using lockout/tagout procedures, and testing circuits to ensure they are de-energized. They also receive extensive training on electrical safety practices and are aware of potential hazards to minimize risks.
With a known radius formula you use math to determine the difference between the straight line distance of the bend angle and the amount that a radius would trim the angle in the same senario. The 90 degree calculation method would be suitable for 90 degree fabrication, although it has to be considered that when measuring the finished piece, you are measuring the radius twice to get your result. In other words, if you use the known radius formula and you add the outside diameter of the pipe, you should have your 90 degree gain in theory. Also, if you measure the two sides of the 90 as a finished piece, and subtract the O.D. of the pipe, you should be close to the calculated number.
My answer to this question is a little different.
I have predetermined a lot of conduit bends and cut and threaded a lot of rigid pipe in my life. And I am sure that in some class, somewhere I probably had to do the math for this question, but through the years I have discovered that the gain is different for different benders shoes and for different pipe sizes, so it been my experience that a table is only a close estimate. And a formula is just another thing to have to either memorize and or write down and keep handy. So instead of trying to remember formulas or tables.
I simply take a stick of scrap pipe and measure it's length first, then write that measurement down on a piece of paper. Lets say our un-bent stick our pipe is 40" long.
Then i bend a perfect 90 degree bend in it.
After it's bent, I measure the stub length lets say it 12 " and lets say the the leg length is 32 5/8", I add them together and lets say I get 44 5/8" Next I subtract the 40" original pipe length from the 44 5/8" and get 4 5/8"; that is my gain, for that size of conduit, bent with that shoe on that bender on that job. I always assume the next jobs bender is probably going to be a little different then this one. And I'll have to do it again on that job.
Anyway after that I write that amount in my scratch note book for that pipe size and shoe, and subtract that amount from the next pipe i have to bend.
Then all you have to do is cut the pipe to length, put it the threader and cut the threads. Then take it out of the threader and bend your ninety in it. It will fit perfect.
Now if you have more then one 90 in the run you have to add the gain for each one. Then subtract the total of the 2-90's. Oh ya, you also have to add something for the thread's that go into the boxes, for the lock nut's and bushings.
Look on the side of the conduit bender. All the settings are there to bend perfect bends each time. The line across the benders shoe is for pulling point of bends and the star on the shoe is the starting point for shrink back bends. To fully appreciate the bending procedures that the bender can do read and understand the instructions that come with the bender. It will save you pipe and time in the long run.
What is Fault location in transmission line?
Fault location in a transmission line refers to identifying the specific location where a fault has occurred, such as a short circuit or a ground fault. This process involves using various methods such as distance protection relays, traveling wave analysis, and fault passage indicators to pinpoint the fault location accurately. It is crucial to quickly isolate the faulted section and restore power to the rest of the transmission system to minimize downtime and maintain system reliability.
What is the best type of insulation?
The best type of insulation depends on the specific needs of the space being insulated. Common types include fiberglass, cellulose, spray foam, and rigid foam. Factors to consider when choosing include cost, R-value, moisture resistance, and installation requirements.
How does an open circuit occur?
An open circuit does not work. You need to have a complete circuit for the electrical current to flow back to its source. For example: An open circuit occurs when a series fuse blows or a connector is unplugged.
What is the formula to calculate secondary current?
The secondary current is calculated by dividing the secondary current by the impedance of the load. This value shouldn't exceed the secondary-winding's rated current except for short periods of time.
How the infrared burglar alarm works?
Transmitting binary ones and zeros via IR (infrared) light is not as complicated as it may appear at first glance. Just as radio stations transmit information using radio waves, infrared devices transmit data using the infrared frequencies of the electromagnetic spectrum. Also, just as you need a compatible device to listen to a radio broadcast, you must have a device capable of understanding and translating incoming infrared signals. All sending and receiving IR devices contain small, dark windows called IR ports. Inside these ports, transceivers (a combination of a receiver and transmitter) send and receive data using the IR frequency. After a device's CPU (central processing unit) sends the binary ones and zeros to the software controlling the IR transmission process, that information is converted into pulses of IR light. The software then forwards the data to the device's transceiver, which transmits the IR signals to another IR port. The receiving device's IR software converts the infrared transmission back into binary digits. IR devices transmit the binary ones and zeros according to a protocol set by the IrDA (Infrared Data Association; http://www.irda.org). For high-data transmissions, such as from a laptop to a printer, both devices must be within a few feet of each other and the IR ports must be within each other's line of site. The data is sent in a 30-degree wide cone from one IR port to another. Depending on the IR software, a pulse of light could represent a digital one, while the absence of a pulse of light could represent a digital zero. High-speed IR devices don't actually transmit data in a serial string of ones and zeros, however. Rather, bits of data are sent in groups to speed up the transmission process.
reference:(http://www.smartcomputing.com/articles/archive/r0403/30r03/30r03.pdf?guid=) *note: Search More You Damned Fool!!!
What safety precaution is required for starting an electric motor?
1. Proper cable connection through a suitably rated starter.
2. No over load situation
3. Mechanically stable mounting and aligned well with the driven equipment.
4. Safety precautions to be taken based on the equipment driven by the motor.
What components in a computer contain gold or platinum?
To use for electrical currents or possibly store information. You can extract the gold be getting the computer chips and putting them in a glass jar with Mulatic acid and hydrogen peroxide. It should desolve the metals except the gold
How many volts can transmission wire carry?
Transmission voltages are usually considered to be 110 kV and above. Where higher capacity is needed the line conductors are grouped in to three and four groups per phase leg. Voltages less than 33 kV are usually used for distribution by the utility companies.
The utility company then supplies the transformers to drop the voltage even lower so that it can be brought to homes to be used by their customers.
The transmission lines are of a composite arrangement. ACSR, Aluminium Conductor Steel Reinforced.
How many watts can install in 1000 microfarad?
Zero watts can be installed in 1000 micro farads. Watts are the product of amperage times volts. Micro farads is a value used in talking about capacitance.
I can see that the best answer has already been given (the units aren't even remotely close). But suppose that what the asker meant was 125 kVA? In that case, it can be answered.
VA (or Volt-Amperes) is what's used to represent current consumption when the circuit runs on any form of alternating current (AC). Watts (W) don't apply, because of the inherent properties of a changing waveform. To properly calculate the actual put-into-use (or effective) power, one would have to take the entire circuit into account.
But, to answer the speculated question, I would say - anywhere between 125 kW and 0 kW, depending if the load is purely resistive, or purely capacitive in nature, respectively.
(this answer provided for the benefit of Google click-throughs, mostly)
How will a 3 phase panel give you 110 volts and 220 volts?
A three phase panel will not give you 110 and 220 volts. A three phase four wire panel will, but not at these voltages. The nearest voltages will be 120 and 208 volts. The 120 volt is the wye voltage of 208 volts. 208/1.73 = 120 volts.
A single phase three wire panel will give you 110 and 220 volts.
What size of fuse should be used for 75 hp 415v 3 phase motor connection?
To answer this question, wire size is rated in the amount of amperage that it can legally carry. Fuse sizing is based on the amperage that the wire carries.
The formula to find amperage when the HP is known is I = HP x 746/1.73 x E x %eff x pf.
A standard motor's efficiency between 5 to 100 HP is .84 to .91.
A standard motor's power factor between 10 to 100 HP is .86 to .92.
Amps = 30 x 746 = 55950 = 55950/ 1.73 x 415 x .87 x .87 = 55950/550 = 101 amps.
The electrical code states that a motor conductor has to be rated at 125% of the motors full load amperage. 101 x 125% = 126 amps
A #2 copper conductor with an insulation factor of 90 degrees C is rated at 130 amps.
Fusing for this motor will be, non time delay fuse 300 amps, time delay fuse 175 amps or a circuit breaker rated at 250 amps.
Which size of motor requires a solo run test?
All motors should be test bumped to check for rotation. Larger three phase motors should be disconnected from the load before this is done.
What is meant by load in diesel generators?
Any device that uses the generator to supply its operating voltage is electrically classed as a generator load.
How do you step up 12vac 3phase to 24vac 3phase?
Twelve volts is not a common three phase voltage. Assuming that this is a hypothetical question any 1:2 ratio transformer will do the job.
Rather common for electric fork lifts
very small ones use 12v (hand stackers,pallet jacks)
larger ones are 24v 36v or 48v
the original transformers on the chargers usually run from 480V
and the chargers are specifically designed for the battery
most chargers use half wave rectifiers in a star configuration
600A thru a .7v drop for a diode is 500w loss, full wave is 1000w
regulation is switched from the primary side since its easier to handle the low current
How do you determine a 3 phase motor and each winding?
To see if the motor is three phase or single phase look at the motor's nameplate. There it will tell you what the voltage needs to be and what system phase the motor needs to be connected to operate properly.
I assume that it is an air compressor (dual units - two compressor motors) used to provide pressurised air to operate some valves and devices in a industrial plant. (Because it is not clear in the question)
Normally the compressor is designed to operate in "load and unload " mode through few solenoid valves, if not equipped with Variable frequency Drive.
If the compressor is equipped with variable frequency drive, then it is designed to run in "load and Unload" mode using the VFD for variable speed to switch between load and unload mode.
In both the cases, load and unload mode are trigged by pressure switches or pressure transmitters at a preset differential values. Air compressor runs on "load" mode till pressure reaches the preset maximum value. It then switches to "unload" mode till the pressure reaches the minimum preset value. Once the minimum value is reached, it switches again on "load" mode. The cycle continues, but motor does not start - stop during these modes.
Air pressure is a function of consumption in the usegae points, which keeps on reducing gradully basis the consumption. How quickly or slowly the pressure reduces - depends on the rate of air consumption.
There could be several reasons for the second compressor to go on - off every 10 second.
Check the "load - unload" pressure setting on the conmpressor. Increasing the differential setting a bit more, will increase the on-off cycle time. Check the requirement and data sheet before doing so.
Check the consumption, whether it is genuine or waste (air Leakage). Check what is happening the first compressor. If it runs on "load" mode all the time then the actual consumption is just more than the capacity of the one compressor, hence the second one comes on but goes off every 10 seconds, since the consumption is just slightly above the first compressor capacity.
If the waste or leak can be arrested, only one compressor can manage the load, most of the times.
Check the control philosophy the compressor, whether it is designed to go on - off or it is designed to switch between load and unload mode - corresponding to differential pressure setting. (Generally Load and unload mode does not turn the motor on and off, but during unload mode, it keeps running at almost no load current and during load mode it takes normal load current)
