None of those materials will conduct electricity. They are therefore called insulators.
However if a sufficiently high voltage is applied across an insulator it is possible that it will be damaged. This is known as the "breakdown voltage". The amount of voltage needed to cause breakdown d…
The definition of the ampere is : 'that constant current
that, if maintained in two straight parallel conductors of infinite
length and negligible cross-sectional area and placed one metre
apart in a vacuum, would produce between them a force equal to 2 pi
x 10^-7 newtons per unit length'.
No it does not mean you have a 200 amp service. you should / could possibly have a "main" breaker. That breaker size is your service size.
The best way to improve power factor is by adding capacitors. Low power factor is due to reactive loads (motors, pumps, etc.) that are connected to your electrical system. ADDITION The best way to improve power factor in the case of motors is to use a motor drive, like a Variable Frequency Drive. …
The rotor turns.
To apply the AC magnetic field to the rotor, making it rotate.
Most times it is the surge current the breaker can withstand in kilo-amps. A normal breaker will see several thousand amps in a short condition. The breaker must be able to withstand and break that current safely.
Possibly... but only a trained electrical technician would be licensed to do that kind of work!
it is the mathematical analysis which shows relationship b/w various resistors connected in star or delta form's using the transformation process we can convert delta into star or viceversa
Because hydroelectric plants are important because they provide a low poultion and cheap energy. The plants are expensive to build.
If you are referring to a megohm meter, it is a test of the insulation properties of such things as electric wiring, motor windings and high power antenna mounts. We use a "megger" or "meg out" electrical wiring and equipment to see if it is shorted to ground in any way. The megger uses much highe…
In today's culture, electricity is a vital part of functioning as a society. Simple tasks, such as waking up at a designated time or enjoying a piece of music, are accomplished currently via electronic means. One only needs to consider the consequences of a relatively short power outage factories…
A circuit breaker shuts down and can be reset. (A fuse does not "shutdown", it fails, or blows, or breaks and cannot be reused.)
Synchronous motors are those that run only at Synchronous speed ie.. constant speed.
Use the link below and scroll down.
The best type of insulation is glass.
On TRANSFORMER OIL BREAK DOWN VOLTAGE test is carried out which is done on field while filling the oil in transformer. This process is also called oil filtration. 1.Take sample from top of Transformer before filtration. 2.The BDV of oil should withstood min 50 KV 3.The gap between the test electr…
In North America there are no appliances that use 277 volts to operate. 277 volts is the star point voltage of a three phase four wire system. The three phase system is 277/480 volts. The 277 volts is usually used in lighting applications in industrial and commercial warehouses.
A thermocouple is a temperature sensor, or more precisely measures temperature differences between two locations. Because it uses only wire in the sensing, it can be useful for measuring extreme hot or cold temperatures or in difficult environments. A thermocouple works because of the thermoelectri…
The purpose of an electrical panel board or electrical distribution panel is to supply individual circuits from the main distribution board. As the board is supplied with one circuit of high capacity , it needs to be broken down into smaller branch circuits. Breakers accomplish this obligation by pl…
A start capacitor is wired in series with the motor's start winding via a centrifugal start switch. The switch disconnects the capacitor and start winding once the motor has reached a pre-determined minimum speed. The motor then continues to run on its main field winding. A different design uses a …
An electrical conduit is a tube used to protect and route
electrical wiring in a building or nonbuilding structure. Electrical
conduit may be made of metal, plastic, fiber, or fired clay. Most
conduit is rigid, but flexible conduit is used for some purposes.
An octopus connection is a connection that has many connections. In
electricity, these types of connections are usually avoided.
1. Describe the electrical systems you have worked on and how did you get your training? 2. What is your experience with electrical schematics? 3. What is your experience with ladder logic? 4. Describe the malfunctions you have experienced with PLC hardware? 5. Describe a tough electrical troubl…
In electronic circuits, Vss is ground or 0v and Vdd is the the positive supply. The s and d come from the source and drain connections on MOS transistor devices. In a similar way Vcc is also the positive supply, the c coming from the collector on bipolar transistors. The terms Vcc and Vdd are normal…
1st Answer by ID1041279033
THE CORRECT ANSWER IS the 2nd answer.
Of course! Only 150 volts can kill you, and high voltage is over 1000 volts. Very few dies of so little, but it have happened with only 150 volts. And 1100 volts means danger of death.
A current of 6mA across the heart will cause it …
Dielectric heating is a type of heating used in engineering.
Insulated materials are heated and then put over an electric field
that changes quickly. It is usually used for making plastics and
Security Threats/Vulnerability: An automated system may have a limited level of intelligence, and is therefore more susceptible to committing an error.Unpredictable development costs: The research and development cost of automating a process may exceed the cost saved by the automation itself.High in…
Whichever way it is connected, no matter whether it is in a star configuration or in a delta configuration, a 3-phase motor's start-up current can be more than 4 times its normal running current. If the star configuration is used when first switching-on power to a 3-phase motor, a much smaller "sta…
There are no insides of a star delta starter. The components consist of two three phase contactors joined on a common back plate with a mechanical interlock between them so as to prevent both contactors being able to pull in at the same time. <<>> There are two ways of wiring three pha…
Amps * volts / 1000
The equation you are looking for is, amperage when kilowatts are shown. This is for three phase systems. To change watts to kilowatts divide watts by 1000. Amps = kW x 1000/1.73 x Volts x pf. Use .8 for pf on large motors.
The advantages of computers is that it makes different task easier.
It also saves time and effort and reduces the overall cost to
complete a particular task.
The definition of reactive power is power that is supplied from and
AC circuit. This occurs when the voltage and current are not in
The advantages of automation include increased productivity and
reduction in the hours a person has to work manually. This is
especially useful in factories.
The most typical industrial three phase voltage in the United States is 480volts. In Canada it is 600 volts.
Read the motor's wiring diagram to see what colors the motor maker has designated for the 3 connections: "common", "start" and "run".
When capacitors are connected in parallel, the total capacitance is
the sum of the individual capacitors' capacitances. If two or more
capacitors are connected in parallel, the overall effect is that of
a single equivalent capacitor having the sum total of the plate
areas of the individual capacitor…
The Star/Delta starter is probably the most commonly used reduced voltage starter, but in a large number of applications, the performance achieved is less than ideal, and in some cases, the damage and interference is much worse than that caused by a Direct On Line starter. The Star/Delta starter re…
verification of accounts and identifying errors to a period of time.
A zigzag transformer is used in connection with 3 phase and is made up of 6 coils connected in a "Y" manner. Each leg of the "Y" is made up of a coil on a different phase leg of the transformer. The neutral formed by the zigzag connection is very stable. Therefore, this type of transformer, or in so…
Electrical power is measured in watts.
Power is measured in watts. There is no such thing as 'electrical
power' as power is simply a rate.voltThe basic unit of electrical power is the watt. If the power is very large, then kilowatts (thousands of watts) or megawatts (millions of watts) are …
A voltage divider (two resistors in series) will achieve the required result. The value of the resistors will depend on what current is required to be supplied. It also matters what variation from 3V is allowed since taking current will make the voltage drop. An electronics parts shop will sell com…
It really depends on the computer. If you have an old-style CRT type monitor that stays on too, it may use far more power than the PC. You can figure the number for your particular setup, here's how:
First, electrical consumtion is actually measured in kilowatt-hours, not kilowatts. A kilowatt is…
For information about fluorescent tube lights see the answers to the Related questions and the Related link shown below.
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 conside…
a programmable boot disk software for networking purposing
gd noon, you can check an IC only with the Oscilloscope not with a Multmeter.because IC has its data sheet parameters
The vacuum tube can be used as any of the following: amplifierswitchrectifierlogic gatedisplaydramlight sensorvoltage/current regulatoretc., etc.
The colors are red to red, black to black and yellow to yellow.
Are you asking about a wiring diagram for the right switches to make an electric motor turn either in a forward or a reverse direction? Or for a linear motor to go either one way or the other? If so, please ask your question again and state what type of electric motor you are asking about, because …
The power factor depends on the properties of the load, and if any power factor correction is done it has to happen at the load, so that the current in the transmission lines is reduced. Correcting the power factor at the sending end fails to address the problem.
An Automatic Voltage Regulator (AVR) is a special piece of electrical equipment which is designed to maintain its output voltage at an almost constant value even though: the input voltage supplied to it may vary considerably within the voltage range for which the AVR was designed and the amperage o…
You have to be specific. whether the conductor is aluminum or copper. Current carrying capacity will be different for these two types. Copper cable can take more load than aluminum cable for same diameter.
A standard starting capacitor is not polarized. Either wire will
connect to either side of the capacitor and will work fine. Make
sure that the capacitor does not have positive or negative on the
terminals. If not, then it is reversible.
It would be the same as if it were connected to a utility service. To find the wattage of a device multiply the voltage by the amperage. W = A x V.
lower power dissipation
lower operating voltage
instant on (no heater warm-up time)
possible to integrate with other devices into one package
This answer needs two parts: 1. The main 3 phase wiring. 2. The control wiring. To be able to give them, please give more details, such as: 1. Do you have a stop/start button or do you have a pressure switch or remote stop/start? 2. What are the voltages you are working with? 3. Do you need an…
To answer this question a voltage and HP must be stated.
To answer this question the voltage and amperage of the unit must be stated. Once this is given the generator size can be calculated.
To answer this question the voltage and amperage of the unit must be stated. Once this is given the generator size can be calculated.
Is there a question here.
Answer for USA, Canada and countries running a 60 Hz supply service.When using a three phase contactor, a three phase overload block must be used. The wiring of the contactor consists of taking L1, L2 and L3 of the supply and connecting it to L1, L2 and L3 of the contactor. The load is connected to …
To trouble shoot a device the problem with the device has to be stated. With a UPS the first thing to check is the batteries.
The NEC is not available in an online format. It is, however, available as a digital copy through various online vendors. New Info: Actually, the NEC is now available online. You can only look though, you cannot print. For that you have to buy a copy. Check the related question below for a link. …
A potentiometer is another name for a variable resister used for voltage dividing. Potentiometers have three tabs on them The two outer most tabs have the full resistance of the device across them. The center tab is connected to the wiper that slides across the surface of the resister. A voltage is …
It is protection installed to protect, usually motors, from going beyond the amperage capacities that were set down by the manufacturer's specifications of the motor. As a motor loads up to its rated HP it will operate within the motors amperage range. More loading on the motor will increase the amp…
HDPE pipe is high-density polyethylene plastic pipe often used for
drainage in household plumbing. HDPE is also used for electrical
and communication applications. HDPE is available with different
diameter and wall thickness dpeneding upon the application. It is
also available with UL rating. HDPE p…
watts = volts * amps * 1.73 * power factorIf the load is resistive, such as a heater or incandescent lamp, use 1.0 for power factor.For reactive loads such as motors, the power factor is usually found on the nameplate.CommentMore specifically, for a balanced load (and ONLY for a balanced load) power…
They do all of their work in a deenergized state.
It depends upon the equipment and what you are doing with it. It is easy to remedy the situation but swaping the secondary leads, but the electric drawings must be updated so that people are not confused next time the look at your circuit.
Thermoelectricity is electricity generated with the thermoelectric
effect. Essentially, when you heat one end of a suitable material,
the electrons move away from the heat, creating an electric
current. It is not terribly efficient, but thermoelectric
generators are often used to capture waste heat.…
Diagrams are unavailable in this Q & A format. <<>> A good diagram source is Sq D Wiring diagrams, see sources and related links below. This book has a wealth of information for anyone that does electrical control work.
In general, a DCS or PLC, handles numerous discrete I/Os. One common I/O module (board) is used to supply 8, 16 or more points. Discrete output circuits from a DCS typically use low power level signals (transistors, micro relays) which cannot be sent directly to the field devices such as electromagn…
When we see IC, it usually refers to an electronics component called an integrated circuit.
Control Panel is virtually the control center of your computer. It allows you to change settings for programs, hardware devices, set up network connections and user accounts. Basically its customizing your computer. If you're working on a school or office computer which is linked to the network, th…
Full question is:
What is true of semiconductors
A have a larger band hap than insulators
B Doping a semiconductor makes it less conductive
C Electrons conduct well if they are in a filled valence band
D Conduction band is higher in energy than the valence band
E Holes refer to empty atomic si…
Vacuum tubes have been built in sizes as small as the eraser on the end of your pencil to as big as a bus. It all depends on the purpose and power requirements. The typical vacuum tube used in household radios and TVs was half an inch to one inch in diameter and two to five inches tall.
Start capacitors and run capacitors are two different types of capacitors. They alter the current to create a rotating magnetic field. They have two or three terminals to which the wires are attached.
Anything beyond 90volts might kill an human. Some are more
sensitive for even lesser voltage like 30 Volts. Do not touch
anything beyond 30 Volts
capacitance is the ability of a body to store charge in anelectric field. Capacitance is also a measure of the amount of electric potential energy stored (or separated) for a given electric potential.
AnswerA capacitor is a device that will store electrical energy. This energy is stored in its ele…
While the old ballast is still in the system identify all of the wires. Cut the wires from the old ballast at about three inches from the ballast. Take the old ballast out and install the new one. Using small wire nuts reconnect the new ballast to the wires the same way the first ballast was wired. …
On the whole megger testing is non destructive. What happens is a DC voltage is applied to the device or winding under test. It is an insulation test to see is the insulation has been injured in any way to cause a short circuit when normal power is applied to it. On my megger there are 3 ranges 300V…
The method of turning manure into electricity is called "biogas" and is a procedure where cattle manure is processed to release methane gas that will be burned as fuel to power a generator.
Answer for USA, Canada and countries running a 60 Hz supply service.A motor starter is a piece of equipment that incorporates various components necessary to control the operation of a motor. Common components include:Disconnecting meansMotor Relay (sometimes called a starter by itself)Control wirin…
They collect all the cats in the country and throw them in a carpet factory and use a complex system of electro-gravitational machinery to pull out the static, thus harnessing the Awesome Power of Cats!
Line commutating chokes are used to smooth voltage peaks or bridge
commutating dips. In effect, this reduces the effects of harmonics
on the inverter and power supply. A line commutating choke is
necessary to reduce current peaks if line impedance is <1%
To do this you need to study how to use thyristor-control for power circuits.
Press down on the access button and it should say please enter your password then make up a password and repeat it when it says to. If that doesn't work undo the back and press the reset button
Some US Navy ships have a battleshort switch for certain systems.
A thyristor is primarily a very fast "switch-on" device and is not designed to be used as a "switch-off" device. A circuit breaker is primarily a "switch-off" device which is used to automatically break the flow of current from a source to a load whenever the amount of current exceeds the rated cur…
The wire in a circuit helps to pass power to the electrical appliances.
Use a small light bulb, such as 25-50 watt. Connect 120 VAC power to the big L1 terminal. Connect the big T1 terminal to the light bulb. Connect the neutral to the light bulb. The light bulb will be OFF. Connect another 120 VAC wire to the control input terminal #3. Connect another neutral to the…
The first large nuclear reactors in the world were invented to produce plutonium for the atomic bombs in WW2. They were not power plants, the heat was considered waste and was just dumped into the Columbia River in the Hanford Site in Washington. Shortly after the war work was begun on Boiling Wate…
A jet engine is a gas turbine -- natural gas causes it to spin; a steam turbine is of heavier construction, with many vanes in decreasing diameter and pressure from steam passing through it causes it to spin.
Read and interpret drawings, circuit diagrams and electrical code specifications to plan wiring layouts. • Pull wire through conduits and through holes in walls and floors. • Install brackets and hangers to support electrical equipment. • Install, replace and repair lighting fixtures and e…
It will not work at all.
No, an inventory is what is in stock; a power supply powers an electronic device and determines wattage and voltage, usually from a wall outlet.