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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.
you would wire a float switch into the control circuit i.e, the  contactor coil (which is relatively low current but rated at least  for the control voltage,, in most cases 120VAC). also in the same  circuit would be the overload contacts. if the overload trips  and/or the float switch opens...
you would need a motor starter/contactor with the contactor coil  rated at your control voltage. the motor is wired through the  contactor main contacts and the control circuit wired into the  contact coil
float switches are not rated for motor currents, therefore you  would need a motor starter/contactor to handle to motor current and  the float switch would be wired into the coil circuit, i.e.,  control voltage source.. I'm guessing 120VAC wired through the  float switch to the contactor coil...
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=>T2,10  L3=>T3,11 4=>7 5=>8 6=>9. Low Voltage (220-240) goes as  follows L1=>T1,6,7,12 L2=>T2,4,8,10 L3=>T3,5,9,11. "L"  Denotes Line Side Voltage ...
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...
The term killowat simply means 1000 watts. Watts are computed as  volts times amps. A load of one killowat used for one hour consumes  one killowat hour of energy. That would be 60 killowat minutes,  however that measurement is seldom used.
kW = (V × I × PF × 1.732) ÷ 1,000. now if we assume unity PF and solve this equation for "I," we get: I = 1,000kW ÷ 1.732V.
This forum is Home Electricity. You shouldn't have 277 volts in a  home.
Using a megger you check from either positive or nuetral to ground.  The megger should read open (usually OL). It doesnt matter which  connection you choose as long as one is ground. If the megger shows  anything other than open the windings are bad.
Without knowing what device the blue and brown wires are on, an answer can not be given.
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...
  == 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...
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 and  AC circuit. This occurs when the voltage and current are not in  phase.
It is a device used on power systems above 1000 volts to protect  other equipment from lightning and switching surges.
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 and  reduction in the hours a person has to work manually. This is  especially useful in factories.
let me try to explain it this way. Suppose I have an electric  dipole that is placed in an external electric field E(vector).    Now, scientists try to calculate the energy stored in the dipole  due to its position and configuration in the external field.   When you learn about angular...
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.
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...
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...
Answers does not have the ability to reproduce diagrams on the answer page.
input--> star configuration -->delta configuration. both  configurtaion is connected to 3 phase motor coil. mail contactor is  connected to both star and delta configuration. timer is connected  to 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 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 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.
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.
two contecter<<>>There are three contactors used in a Star Delta configuration.
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...
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 delta  configuration in a 3 phase system. Any phase to another is 480v.  Any phase to ground is 277v
A machine that makes electricity is called a generator. Generators use electromagnetism to convert physical movement into electricity.
Symbols   Methuselah, the ParrotThe 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...
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 (power...
Due to high starting currents involved,having a star delta starting method is of importance since the machine starts at lower current when in star.As the motor accelerate to almost full load speed, its automatically connected to full load supply current (delta)thus reducing high starting currents...
a kilowatt is 1000 watts a megawatt is 1000000 wattsa gigawatt is 1000000000 wattsa terrawatt is 1000000000000 or a million million watts
Yes. The IEC 60071.1 Std states a diminish withstand of aprox of 1%  every 100mts above 1000mts. For example: for a 13.8kV system the  insulation level should be of 95kV (interior). If the installation  is going to be at 1,500mts then de minimum insulation level of your  equipment must be: 95kv/...
Nikola Tesla is known as the father of current. Tesla is made  contributions to the modern alternating current of electricity.
Efficiency drops off rapidly as you approach the knee of the  saturation curve as energy is converted to heat rather than  electricity.
When finding fault in NEXT and FEXT the problem is usually too many twists in the cable although with NEXT the problem is at the same end of the cable that generated the signal whereas with FEXT the problem occurs at the opposite end of the cable where the signal was sent.
The way to identify any transformer is to look at the the transformers nameplate. The primary side will be designated H1 to H4. This is the primary side and the voltage will be stated as to the voltage to connect to. The secondary side will be designated X1 to X4. This is the secondary side and the...
If the load is connected to the motor via belts, you can change the speed the load is turning by changing the pulley sizes. To get the load to slow down, increase the size of the pulley on the load; to get it to speed up, increase the size of the pulley on the motor. To reduce the speed of the motor...
Helmet, Ear protection, face shield, safety glasses, sock hood, FR  shirt and pants, Voltage rated gloves, Leather glove protectors,  Voltage rated tools, according to NFPA-70e standards
AOI logic, which uses AND, OR,and INVERTER(NOT) gates NAND/NOR Logic, this uses only NAND or NOR gates respectively.
First check and see if there's any voltage on the cable by using a voltmeter andthen use an ohmeter to check for resistance to ground.
PLC is used in Industries, manufacturing Plant and help to improve the control over Mechanical & Electrical devices. It helps in following ways : 1.) Automation : Using PLC a process can be switch to 100% automatic, previously it was done by relay logic, which was more complicated in terms of...
When the load current is higher than 15 Amps.
Because they dont need high voltage but high current, wich could by useful in some scenario's.
To answer this question a voltage must be stated.
The only thing that will trip the starter, is the load of the motor. Check the motor leads to make sure you have not crossed them over coming from the motor junction box. If the motor current is normal nameplate full load amps when run across the line then reduce the timing of the timer on the...
No you cant, simply because the rain will cause a short to ground causing low insulation (megger results)... The only way is to make sure the phase you are testing is dry and no path from phase to ground is present. usually drying the phase the sanding it down while keeping it covered will give you...
this problem can be fixed by refferring to mannual of that battery and also can calculated by another way use a load 10 watt on your battery and measure the current flowing through it and note the current time after that when your battery discharge multiply the measured current from hour(during...
The size of grounding wires is dependant upon what the motor current category the motor fall into. The higher the motor amperage is, the higher the fault current will be so the larger the conductor size has to be to carry the fault current.
At high altitude air is less dense. This means that any ionised air molecules (or charged pollution particles) in the air have less other air molecules (or pollution particles) to collide with as these ionised/charged particles accelerate towards the electrical conductors they are attracted to ...
The time duration for a megger test is as long as it takes to turn the handle of the megger about five times. Voltage is generated on the first turn and if there is an insulation breakdown on the device being tested it will show instantaneously. If the megger is an electronic megger hold the...
Generator coils generate the voltage, motor coils use the generated voltage.
A blowout coil connected in series with contactor's auxiliary contacts that shunt around the main contactor contacts. The coil is out of the circuit when the main contactor contacts are closed and in the circuit when the main contactor contacts are open.
A trip rod on the circuit breaker is spring loaded and held by a  permanent magnet in the "armed" position; the flux shifter, when  energized due to an overcurrent event, creates a magnetic field  opposite the permanent magnet field....this neutralizes the  magnetic field, releasing the trip rod...
There is no set limit to the number of channels an analog lighting system can be. Since each fixture is controlled by the console with a wired signal to the dimmer rack, the only limitation is the number of wires to the dimmer rack and the number of dimmers. Industry designs for these older consoles...
The capacity, known as the wire's ampacity, of the wire to carry amperage safely determines the size of the wires used in house hold wiring. This capacity is stated in the electrical code that is used in different countries around the world.
The first word that comes to mind is the word "transformer".
1 kW x 12 hours = 12 kWh. As to the cost - that may vary from country to country. Look at a bill from the power company to see how much they charge you per kWh. If that is not explicitly stated, divide the total amount of the bill, by the number of kWh used.
The production of vacuum tubes.
A regulator loses some voltage in regulating its output, known as the dropout voltage. So the input voltage must be at least the output volts plus the dropout volts. If the input voltage is too low, the output will drop out of regulation.
You don't need three-phase power; tanning beds run on single-phase. You've got enough amps.
It depends on how much the grid is loaded that the dam's generators supply. The heavier the grid load the shorter the time frame to reach the load specified. Likewise the lighter the grid load the longer the time frame to reach the specified load.
They make transformers and other products if they do good to mississippi they are a really good company. By: 20
Wire size needed depends on amperage, not watts. If you know the voltage of the power supplied you can calculate the amperage using this form of the "power formula": A = W / V Then there are tables that tell the amperage each wire gauge is capable of carrying. Just select the gauge that has the...
The electrical system must conform to the electrical code in who's jurisdiction it is to be built. Most electrical engineers when designing a system use the code book constantly. In actual fact they over design above what the code book calls for as the code book rules are the minimum requirements...
Doing the job right the first time is important. Changes when the project is underway is an added cost. Without a properly designed layout the job moves slower due to people not knowing what they want and this then raises the overall cost of the project. The old adage put it on paper first, get it...
From the bottom of the motor contactor's heater block you connect the motor's leads to T1, T2 and T3. If the motor rotates in the wrong direction reverse any two leads on the bottom of the motor's contactor heater block.
To answer this question the voltage of the immersion heater is needed. I = W/E.
It is the begining of electrial circuit, or where the power comes from, to the end point where it will be used. "Example" circuit breaker panel box has the power, circuit breaker controls the power the cable allows the power to flow to the outlet so when electrical device is plugged in it works.
The size of the contactors are dependant upon what the voltage the motor is operating on.
To answer this question the voltage of the system must be stated. You may need to use a splitter after the main disconnect and then two fused disconnects for each individual motor feed.
No. Power is constant. Transformers neither increase nor decrease power, except for minor losses. They increase or decrease voltage, and they decrease or increase current, but the product of voltage and current, i.e. power, remains the same.
The condenser is another name for a capacitor. You can use a capacitor for various purposes, such as DC blocking, filtering, coupling, de-coupling, power supplies, etc. The equation of a capacitor is ... dv/dt = i/C ... meaning that the rate of change of voltage in volts per second is proportional...
Niagara Falls, NY was the first to have hydroelectric powered lights in 1879.
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...
In a split phase service, which is the standard for residences and very small businesses in the US, Canada, and some other areas, one transformer is connected to one phase of the three phase primary distribution mains. The secondary winding is centertapped, with the centertap grounded and called...
  9 - Is this a test answer or do you just want to know for a project you're doing?   Take a look at NEC chapter 9 - tables 4 and 5 (in the 2005 edition at least)