50 Hertz Industrial Electricity

All of Europe and most of mainland Asia and Africa use 50Hz frequency for their industrial electrical needs. Industrial motors operate better at this frequency, since the voltage drops could be easily maintained.

467 Questions
50 Hertz Residential Electricity
50 Hertz Industrial Electricity

Why does one pin on a three pin plug get really hot?

Either the conductor connection to that pin of the plug is failing-replace the plug

or- the receptacle is old and loose fitting due to metal fatigue-replace the receptacle

or- the conductor termination at the receptacle is loose-tighten or replace receptacle if damaged. Loose connection creates resistance, which equals heat

Answer for UK and other countries using 13 amp square-pin plug:

I had this happen yesterday in a fused plug and cured the problem by opening the plug, taking out the 13 A fuse and squeezing together the fuse sockets with pliers to make the fuse a tighter fit. Then I put the fuse back in. That did the trick (for a UK 13-amp plug with fuse feeding a 2 kW convector).

203204205
Building and Carpentry
Salary and Pay Rates
50 Hertz Industrial Electricity

How much does a construction superintendent make?

Not enough

131132133
50 Hertz Residential Electricity
50 Hertz Industrial Electricity

Why is the live pin getting hot on a three pin plug?

Heat is caused by a current trying to flow through a resistance. What you have is probably a loose connection on one of your screw terminals of the plug creating a higher than normal resistance. Take a screw driver and tighten the screws and see if that makes a difference.

99100101
50 Hertz Industrial Electricity

What is the basic function of PLC?

PLC or programmable logic controller is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly line, amusement rides, or lighting fixtures.

939495
50 Hertz Residential Electricity
50 Hertz Industrial Electricity

How can you calculate the current carrying capacity of 1 sq mm wire?

4amps can pass in 1sqmm of wire max it is universal.

In the UK 1 sq. mm wire can take 10 amps max according to tables. Cables that become warm in use should be replaced by a thicker gauge.

818283
Shopping
Sentence and Word Structure
50 Hertz Industrial Electricity
Costco

What happened to Costco's Kirkland Mixed Nuts?

The Brazilian nuts in the 2.5 lbs container are rancid.

818283
Electrical Troubleshooting
Industrial Electricity and Electronics
50 Hertz Industrial Electricity

What are the methods to calculate and improve power factor?

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. These drives allow very precise control over a motor, unlike the very sudden, jerky starting and stopping across the line seen when using a motor starter. They eliminate the huge inrush current required to start motors that causes low PF.

Answer:

1) Power factor can be calculated by connecting an energy meter [P] (voltage coil in parallel & current coil in series with the load), a voltmeter [V] across load and an ammeter [A] in series with the load. Measure P, V & I.

Since, Active Power (P) = V.I.Cosϕ

power factor = Cosϕ = P/VI

2) Power factor is usually (industrially) improved by connecting a shunt (parallel) capacitor bank at feeding end.

How it works??

Inductive loads contain both inductors and resistors. But due to phasor difference of coils and caps when voltage is applied across both, the two currents results in a smaller net current finally. So now the angle (ϕ) between the voltage phasor and current phasor is lessened. When ϕ is reduced, Cosϕ is risen resulting in a higher power factor.

798081
Electrical Troubleshooting
50 Hertz Residential Electricity
50 Hertz Industrial Electricity

We have a problem with induced voltage. We measure 220 VAC in the L and 45 to 60 VAC in the N. There is no chance of changing the cable. How to avoid this?

Normally the neutral wire of every circuit is connected to the neutral bus bar in the main breaker panel. Because the neutral bus bar is always connected to ground you should never be able to measure any voltage between the neutral wire and ground.

So, if you are measuring 45 to 60 VAC between the neutral and the ground it could be that the neutral wire has become disconnected at the breaker panel or somewhere in between the panel and the point where you are measuring that voltage.

Assuming the load equipment - an appliance, a motor or whatever - is still connected to the hot and neutral wires, then, if there is no connection to the neutral going back to the power station, in effect you are measuring the line voltage from the hot feed as reduced by the resistance and/or reactive impedance (total reactance) of the load. That could be making 45 to 60 VAC, as read by your meter, appear on the neutral wire coming back from the load.

A simple way to prove if that is the case is to unplug or disconnect all loads - appliances, light fixtures, motors, etc. - from the circuit in question. If you cannot then measure any voltage between the neutral wire and ground the next thing to check is the resistance between the neutral and ground.

First of all switch off the circuit by switching off the breaker at the main panel - or remove the circuit's fuse if it has a fuse and no breaker - and then use the resistance range on a multimeter to measure the resistance between the neutral wire and ground. If it is a very low resistance then an open neutral is not the cause of your problem. If it measures as a very high resistance or an open circuit then your problem is an open neutral.

The reason for the open neutral must be found and that fault must then be corrected urgently.

In the Discussion page to this question please let us know what you found when you did the tests suggested above, and whether or not this advice helped you to locate and fix this problem.

To be able to help you better it is important to know exactly here this circuit is located geographically in the world and to have confirmation whether - as inferred from your question - it is a 50Hz system with one 230V live and one neutral or whether it is actually a 60 Hz system having two 120V hots (+120V and -120V) balanced around neutral.

Then, if necessary we shall have to consider what other reasons could cause the fault you have described but to be able to do so it would help to know exactly what you found when you did the tests described above.

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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances,

always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

737475
50 Hertz Industrial Electricity

What is the excitation system in a generator used for?

The excitation system is used to control the excitation of the rotating field in the armature. By increasing the armature current, it in turn increases the magnetic flux in the armature coil. This has the effect of increasing the voltage output of the generator. By lowering the armature current this in turn lowers the generator output voltage. The generator's voltage regulator automatically adjusts the output voltage continuously as the applied load on the generator changes.

717273
Electrical Engineering
Electrical Wiring
50 Hertz Industrial Electricity

Diagram of star-delta connection of motor?

See sources and related links below.

525354
Electrical Engineering
Industrial Electricity and Electronics
50 Hertz Industrial Electricity

Functions of the basic components of PLC?

Input

Output

Ladder Logic

Electricity

646566
Electrical Engineering
Electrical Wiring
50 Hertz Industrial Electricity

How do you connect a single phase motor to a three phase power supply in UK?

for countries in Europe and other world areas running a 50 Hz supply service. UK household AC power mains voltage is now 230V (previously it was 240V) 50 Hz. From a 415 volt 3-phase incoming supply you will get this voltage between any ONE line and the Neutral.

Between any two lines you will get 415V. DO NOT WIRE IT LIKE THIS!

So, if you wire the motor to any ONE line (and ONLY ONE) and Neutral you'll get the correct voltage.

<><><>

As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.

Before you do any work yourself,

on electrical circuits, equipment or appliances,

always use a test meter to ensure the circuit is, in fact, de-energized.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

+++

My advice would be to buy a proper transformer which can be connected to a 415V 3ph input and give 230V 1ph output at a current rating suitable for the motor and its purpose. I assume the questioner's installation is in a commercial premises because domestic supplies in the UK are 230V 1ph only - running a 3ph motor off that requires a suitable inverter.

636465
Electrical Engineering
50 Hertz Industrial Electricity

Which equipments used in the substations?

In a substation there are many items.

Circuit Breakers

Disconnectors

Earth Switches

Current Transformers

Voltage Transformers

Surge Arrestors

Power Transformers

Insulators

596061
New Electrical Work
Electrical Troubleshooting
50 Hertz Industrial Electricity

What is locked rotor current?

"Locked Rotor Current" also called LRA which stands for Locked Rotor Amps, is commonly found on electric motor nameplates. Locked Rotor essentially means the motor is not turning. The current or amps in this case have to do with the amount of electrical energy required to start the motor. At the instant the motor is switched on, it is not turning, and draws the maximum current. As the motor starts to turn, the current goes down. This required energy is much greater than the Full Load Amps or Running Amps, which is the current drawn when the motor is running at normal speed under full load. The current required to start the motor will depend on the type of motor as well as the specified design voltage required for the motor, typically the higher the voltage, the lower the required amperage or current.

The term also applies to equipment such as Air Conditioners which have an enclosed motor inside the compressor, as well as the condenser fan(s) etc.

Depending on the type of motor, LR current can be anywhere from 3 to 8 times the normal running current, also called RLA, or running load amps.

333435
Computer Terminology
Industrial Electricity and Electronics
50 Hertz Industrial Electricity

What are discrete inputs?

Discrete inputs are inputs to a PLC(programmable logic controller)that require an on or off signal. Limit switches,push buttons,selector switches or relay contacts would be good examples of devices used on discrete inputs.Hope this helps.
Inputs often refers to data that is entered into a computer. The resources that are needed for production purposes can also be called inputs. Some of these things are raw materials, energy, and machines, for example. People can also offer their input on a situation. Most people use the word input instead of inputs.

495051
50 Hertz Residential Electricity
50 Hertz Industrial Electricity

Current carrying capacity of 2.5 sq mm copper wire?

5.6 amps to 10 amps

515253
Electronics Engineering
50 Hertz Residential Electricity
50 Hertz Industrial Electricity

4 sq mm copper cable current carrying capacity?

25 amps, 6000 watts

394041
50 Hertz Residential Electricity
50 Hertz Industrial Electricity

Can you put a 15 amp fuse in an electric fire plug?

I would say no as it could blow and if majorly can damage the plug and can be expensive to repair

474849
Electrical Engineering
50 Hertz Industrial Electricity

What is cable size for a 75kW 3 phase 415V Induction Motor 15 meter run of cable started direct-online?

160

001
Home Electricity
Industrial Electricity and Electronics
50 Hertz Industrial Electricity

Can a 3 phase heater be out of phase?

No, a 3 phase heater can not be out of phase.

434445
Physics
Electrical Engineering
50 Hertz Residential Electricity
50 Hertz Industrial Electricity

1 unit equals how many watts?

The 'unit' is a measurement of energy used in the UK for the purpose of billing consumers, and is short for 'Board of Trade Unit'. An 'unit' is exactly equivalent to the kilowatt hour, a power of one kilowatt running for one hour. You cannot equate the unit (energy) with the watt (power).

434445
Industrial Electricity and Electronics
50 Hertz Industrial Electricity

Why should a prime mover's speed be kept constant?

I believe it is related to generator - if the prime mover speed is not constant, the frequency and voltage may not be constant

012
Electrical Wiring
Industrial Electricity and Electronics
50 Hertz Industrial Electricity

How can I wire a 240 V single-phase outlet from a commercal building with 3-phase service 4- wire?

If you have 440 Volts 3 phase, neutral system, you can get 240 Volts single phase, by using one of the phase and the neutral to connect your single phase load

012
50 Hertz Residential Electricity
50 Hertz Industrial Electricity

What is the current carrying capacity of 10 sq mm wire?

About 80~150 amps

394041
Jobs & Education
Mechanical Engineering
50 Hertz Industrial Electricity

How the speed breakers are useful for the generation of electricity?

Next time on the roads, don't scoff at the speed-breakers. They could actually light up small villages off the highway.

An amateur innovator in Guwahati has developed a simple contraption that can generate power when a vehicle passes over a speed breaker. Kanak Gogoi, a small time businessman, has developed a mechanism to generate power by converting the potential energy generated by a vehicle going up on a speed breaker into kinetic energy. The innovation has caught the eye of the Indian Institute of Technology (iit), Guwahati, which will fund a pilot project to generate electricity from speed-breakers.

The idea is basic physics. Gogoi has welded five-metre-long metal plates into the speed-breaker instead of the conventional bitumen-and-stone-chip rumble strip. The plates are movable and inclined with the help of a spring-loaded hydraulic system. The fulcrum-attached plates are pushed down when a vehicle moves over them and bounce back to original position as it passes.

"When the vehicle moves over the inclined plates, it gains height resulting in increase in potential energy, which is wasted in a conventional rumble strip," Gogoi says. "When the plates come down, they crank a lever fitted to a ratchet-wheel type mechanism. This in turn rotates a geared shaft loaded with recoil springs. The output of this shaft is coupled to a dynamo to convert kinetic energy into electricity," he explains.

iit Guwahati has evaluated the machine and recommended it to the Assam ministry of power for large scale funding. A K Das, a professor at iit's design department says it is a 'very viable proposition' to harness thousands of mega watts of electricity untapped across the country every day.

"A vehicle weighing 1,000 kg going up a height of 10 cm on such a rumble strip produces approximately 0.98 kilowatt power. So one such speed-breaker on a busy highway, where about 100 vehicles pass every minute, about one kilo watt of electricity can be produced every single minute. The figure will be huge at the end of the day," he said.

The Assam power ministry is expected to back the iit pilot project.

Das says a storage module like an inverter will have to be fitted to each such rumble strip to store this electricity. The cost of electricity generation and storage per mega watt from speed-breakers will be nearly Rs 1 crore as opposed to about Rs 8 crore in thermal or hydro power stations

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