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Industrial Electricity and Electronics

Parent Category: Electrical Wiring
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.

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you would wire a float switch into the control circuit i.e, thecontactor coil (which is relatively low current but rated at leastfor the control voltage,, in most cases 120VAC). also in the samecircuit would be the overload contacts. if the overload tripsand/or the float switch opens then voltage is...
you would need a motor starter/contactor with the contactor coilrated at your control voltage. the motor is wired through thecontactor main contacts and the control circuit wired into thecontact coil
float switches are not rated for motor currents, therefore youwould need a motor starter/contactor to handle to motor current andthe float switch would be wired into the coil circuit, i.e.,control voltage source.. I'm guessing 120VAC wired through thefloat switch to the contactor coil and the other...
some feedback r insulting or inappropriate. it depend on how u sortthe question. Question is on feed back system in control system. In a controlsystem generally there is a setpoint to be achieved. Control systemaims to achieve the setpoint. However due to inherent reasons, theactual keeps hovering...
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..
Most 3ph Motors are rated for both voltages. High Voltage Wiring(440-480) Connections goes as follows L1=>T1,12 L2=>T2,10L3=>T3,11 4=>7 5=>8 6=>9. Low Voltage (220-240) goes asfollows L1=>T1,6,7,12 L2=>T2,4,8,10 L3=>T3,5,9,11. "L"Denotes Line Side Voltage (Power Coming to the Motor) "T"...
An electrical motor is such an electromechanical device whichconverts electrical energy into a mechanical energy. In case ofthree phase AC operation, most widely used motor is Three phase induction motor as this type of motor does notrequire any starting device or we can say they are self...
I would say that probably the fuse holder is loose, this would cause a voltage drop and result in heating of the fuse. Replace the fuse holder.
The advantages of computers is that it makes different task easier.It also saves time and effort and reduces the overall cost tocomplete a particular task.
The term killowat simply means 1000 watts. Watts are computed asvolts times amps. A load of one killowat used for one hour consumesone killowat hour of energy. That would be 60 killowat minutes,however that measurement is seldom used.
kW = (V Ã I Ã PF Ã 1.732) Ã· 1,000. now if we assume unity PF and solve this equation for "I," we get: I = 1,000kW Ã· 1.732V.
Electricity is transferred with high voltage and low current to reduce transmission loss ( I 2 R , where R= resistance of wire). As high voltage is present in transmission lines, Danger-high voltage is written.
This forum is Home Electricity. You shouldn't have 277 volts in ahome.
Using a megger you check from either positive or nuetral to ground.The megger should read open (usually OL). It doesnt matter whichconnection you choose as long as one is ground. If the megger showsanything other than open the windings are bad.
Dispatch refers to the selling ofelectricity by an power generation or distribution company to usersdepending on demand. Mostly this sale is a very complicatedprocess which the SLDC ( S tate L oad D ispatch C entre) has to conduct everyday throughout theyear with the power generation...
electricity because a light bulb needs electricity
Answer . there should be a diagram on the side of the relay with the pin numbers and some symbols. the pins that are on the coil or control side can be wired power and ground. this generally goes through a switch. the load side has a small gate looking symbol these can be wired power and ground...
You could get an electric shock, If there is a fault in electricalinstallation, if you touch a live metal part. Because theelectricity may use your body as a path from the live part to theearth part. Earthing protects you from an electric shock. By providing a pathfor a fault current to flow to...
The definition of reactive power is power that is supplied from andAC circuit. This occurs when the voltage and current are not inphase.
The advantage of having a star - delta connected motor starter is the advantage of having a reduced inrush starting current.
Follow the schematic of the relay. A relay is simply an electrical switch that is operated by an electric current. When current is present at the relay coil, the relay toggles the switch. If you do not know how to read the schematic of a relay, you probably shouldn't be messing with it.
It is a device used on power systems above 1000 volts to protectother equipment from lightning and switching surges.
Well, there are 746 Watts in one Hp; so just based upon that, it equals 5595.0 Watts. But I would then say, you would have to know at what Voltage the system is operating at, in order to determine the current. I would divide the Voltage into the above Watts to find that. However, I do not know...
The standard length wire mold is sold in is ten foot lengths.
An electric motor converts electrical power to mechanical power in its rotor (rotating part). There are several ways to supply power to the rotor. In a DC motor this power is supplied to the armature directly from a DC source, while in an induction motor this power is induced in the rotating device....
The advantages of automation include increased productivity andreduction in the hours a person has to work manually. This isespecially useful in factories.
Mathematically, just divide 480 by the square root of three. Electrically, 480V refers to the line-to-line value of a three phase system. For example, measure the voltage across A-phase and B-phase and you'll get 480V. 277V is the line-to-neutral value. Measure the voltage across A-phase and the...
let me try to explain it this way. Suppose I have an electricdipole that is placed in an external electric field E(vector). Now, scientists try to calculate the energy stored in the dipoledue to its position and configuration in the external field. When you learn about angular motion, you probably...
explain the effect of incorrect phase sequence
A 250 MCM copper conductor with a insulation factor of 75 or 90 degrees C is rated at 255 and 265 amps respectively. This conductor can only be load to 80% capacity which allows a working current of 204 and 212 amps respectively. To obtain the full capacity of 250 amps a 350 MCM conductor will be...
Richard March Hoe died on June 7, 1886 at the age of 73.
Fuses and breakers are the main forms of protection on generators transformers and most other electrical equipment.
NO! The voltages available in the 3-phase system are 480 (if you wire phase to phase) and 277 (if you wire phase to neutral) Don't try it!
Long Answer: Are you sure you have three phase 240v power? If it has three WIRES (black, white, red) that's not the same as three phase power. A good rule of thumb is if the power is part of a residential distribution system (in your home), it's something called 'split single phase'. If it's part...
Well that is probably a very complicated circuit. You should just look for a Inverter with 220V single phase input and 415V three phase output. It should be that hard to find.
The most typical industrial three phase voltage in the United States is 480volts. In Canada it is 600 volts.
A star delta starter is one complete unit with all of the interlocks built in. The three phase supply is connected to the top terminals and the six wires from the motor connect to the appropriate terminals on the starter. All that has to be connected into the circuit is the timer that tells the...
Copper losses due to winding resistance vary with load since load current varies.
They are devices that are used to control the flow of current.
One of the three phase contacts in the star contactor could be burned open or just open not allowing the motor to start because of a single phase condition. The time interval between star and delta connections could be small enough that the motor heaters will not catch the single phase condition and...
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 isthe sum of the individual capacitors' capacitances. If two or morecapacitors are connected in parallel, the overall effect is that ofa single equivalent capacitor having the sum total of the plateareas of the individual capacitors....
Miniature circuit breakers or MCBs are used to replace fuses that protect individual pieces of electrical equipment and the circuits which supply them with power. In the case of tripping because of a current overload, MCBs are very easy to reset, which is much simpler to do that having to replace...
No of flux line producing can be the difference. And we need improved external structures to get maximum out put voltage through 3pole than 4pole.
To answer this question the voltage of the genset is needed.
The change over time will vary with the type of motor, size of motor and the connected load to the motor. The time should be adjusted so that the motor is up to speed and stabilized at the star speed. It is at this point that the change to delta should take place. One thing to note is, do not leave...
semi conductors are use to control the current flow in any circuit. they are widely used in diodes, transistors, igbt, scr and other electronic component manufacturing. these all allows you to switch or flow control of current. igbt allows you to control the out put magnitude through its gate. a...
A four-wire system has an added conductor - neutral, necessary for supplying single-phase loads where one supply wire is hot and one is at ground potential.
The starting sequence of a star delta starter is initial start in star configuration and time delay then into delta run configuration.
If the delta magnetic starter pulls in then there is a problem in the delta windings of the motor. If the magnetic starter does not pull in then there is a problem in the star delta timing relay. Check the timer relay for voltage output to the delta magnetic after the completion of the timing...
Answers does not have the ability to reproduce diagrams on the answer page.
input--> star configuration -->delta configuration. bothconfigurtaion is connected to 3 phase motor coil. mail contactor isconnected to both star and delta configuration. timer is connectedto main contector....
No, since in series they are 24 volts so you need to charge each one independently with the 12 volt charger. This may be done disconnected or leave them connected and put the charger on the + - of the same battery.
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...
Star delta starting is used to reduce the dip in voltage which can feed back to the primary line which makes other customers unhappy when their lights dim each time a high HP motor is started on the same circuit they are connected to. By starting in a wye connection there is less disruption of...
A star delta starter brings the motor up to operating speed in two steps. A soft start brings the motor up to speed in multiple steps that can be programmed into the starter. Soft start starters have the option of having a bypass contactor in the circuit so that when the motor comes up to operating...
Building codes will vary. In the US, the National Electrical Code (NFPA 70) is the basis for most of those. The answer will vary depending on what the structure is. For a single family home, there is no specific number of outlets per breaker. For commercial work, there is a limit of 10 outlets per...
A thermocouple is a temperature sensor made from two different types of metal. Different metal types give different sensing properties and ranges. Several standard pairs of metals are defined in industry and designated by a letter. A copper-constantan thermocouple is "Type T."
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.
The vast majority of power stations produce alternating current (AC) electricity. They may use nuclear, coal, oil, gas, or garbage as fuel, or they may use flowing water or blowing air, but the same kind of electricity is produced, regardless of the fuel used.
Use a transformer. A 208-240v single phase line has 2 power leads. Consult your local electrician for help! 440v systems are not for toying with when questions like this are asked.
A CONTACTOR SHOULD NOT BE USED TO START A 3-PHASE MOTOR unless there is some sort of motor protection in series with it. You would need a 3-phase contactor and just connect each phase (1 wire) to each terminal of the line side of the contactor, and the 3 wires to the load side. 3 wires on the line...
The use of a star delta starter is for motor control only and not resistive heating loads. This type of starter is used to dampen the inrush current by using a lower voltage to start the motor.
Yes! But they will also die if you don't put it on the floor. On the floor or not makes no difference.
You would get a shock if you provided a path to ground.
The use of a star delta starting is determined by the horsepower of the motor. It is the utility company that has to be asked - What is their policy on how much horsepower will they allow for across the line starting. These days pump installations usually opt for VFD controllers. This will allow the...
The sounds are caused by the oscillations of the frequency changing from positive to negative when voltage is applied to electrical equipment. See related links below.
Ball bearings can not be fixed or repaired they have to be changed and new ones installed.
This type of motor starting configuration is used to start large motors. The utility company's policy is to only let a certain three phase motor horsepower loads across the line starting. High horsepower loads draw high current which draws the line voltage down. This causes a small instantaneous...
To answer this question a voltage value must be given. Circuit breakers protect the conductors that feed the load. . The lower the voltage value, the higher the current value, hence a larger the wire size is needed and therefore larger the breaker size for the circuit. . In reverse the higher the...
two contecter There are three contactors used in a Star Delta configuration.
First check voltage at the main and make sure you have 220 volts coming in. Check the voltage at both peak and off peak hours. If you find low voltage at the main lugs contact you local utility provider.
Just swapping the hot and neutral connections on a plain and simple single phase ac motor (one which was not designed to be reversible) is usually a waste of time as the voltage is alternating and the motor sees this as the same either way and it will still run in the same direction. For a DC...
AC current is measured as I(dc)*cos(w*t), where I(dc) is the peak current through the path, w = 2*pi*f (f is frequency, in this case 50 Hz), and t is the time. As long as 80 A is the peak current rather than the rms current, the value would then be 80*cos(2*pi*50*.005), or 79.9699 A.
No, there is not any difference between the switching action of a relay and a contactor. Both of these devices are operated by an electro magnetic coil.
The replacement fuse must be of the same amperage as the one it is replacing. The voltage does not come into play in this application.
The SPM-D11 uses an independent analog signals for real and reactive load sharing. The Easygen uses a single CAN communication line for the same load sharing. As is, there is no way for them to share. However, there are Woodward devices called Load Share Gateways (LSG). There is a model for real...
It is apples and oranges--kVA and volts are different units describing different things. Determining kVA requires measuring both voltage and current.
Yes, three-phase meters are designed to work even if the phases are unbalanced, which can actually happen if only single-phase loads, such as lighting, are on.
Cables run under the water, like the ones that run from the us to Europe across the Atlantic.
De energising means you are disconnecting a device from electrictysource. Switch off the device, physically disconnect the device tode energise the circuit.
Well I dont think because its quite dangerous. I think no sorry...
480 / 1.732 (square root of 3) = 277. This is due to the deltaconfiguration in a 3 phase system. Any phase to another is 480v.Any phase to ground is 277v
verification of accounts and identifying errors to a period of time.
If you mean by three-valve manifold, then If you apply excessive pressure to your differential pressure transmitter, you could damage your instrument. This is known as over-ranging the transmitter. A three-way manifold valve is a device that prevents the instrument from being over-ranged. It also...
A machine that makes electricity is called a generator. Generators use electromagnetism to convert physical movement into electricity.
If the secondary system is ungrounded, or the secondary system is phase shifted +/- 30 degrees from the primary. I've even seen where the secondary system was phase shifted 150 degrees, so a special transformer was installed. There might be other reasons as well - cost, matches other equipment so a...
Symbols Methuselah, the Parrot The parrot left by Brother Fowles serves as a symbol for the doomed Republic of Congo. Methuselah is denied freedom for most of his life, and while he is kept in a cage and fed by his masters, he loses the ability to fend for himself. Even after Nathan liberates him...
It depends on the application, and on the implementation of the UPS. Some UPS devices function as an AVR by boosting the output voltage when the input voltage sags. A UPS will also help you during a complete power outage, which an AVR will not. A UPS however has batteries which need to be...
To avoid sudden inrush of current in case of high starting torqueapplication
A kilowatt is an unit of true power in an AC circuit -as measured by a wattmeter. A kilovolt ampere is an unit of apparent power in an AC circuit, which is the product of the voltage across a load by the current through it. The relationship between the two is: kilowatt = (kilovolt ampere) x ...
A megger test is done to check the insulation factor of wires ordevices. This is to make sure that when the working voltage isapplied, a short circuit to ground will not occur due to a problemwith the insulation of the device or wire.