Electrical Engineering

This depends on the type of bulb and it's efficiency. Incandescent bulbs produce 700-900 lumens at 60 watts.

You can use a DC ammeter.

because it is being regulated.

Currently, in popular usage, 3 phase systems are arranged in a "Y" or "star" configuration with the same voltage from each leg to ground. Primary sides of transformers are in a delta, "triangle", configuration but this is not the utilized side.

In some old systems, the utilized system is delta with the mid point of one winding grounded. The phases at each end of this winding will measure half the volts to ground as from phase to phase. The phase farthest from the grounded winding measures a much higher voltage to ground than phase to phase since, in simple terms, it is measuring the voltage across 1 and 1/2 windings.

Full Scale Deflection is equal to the max value on a scale or meter. If a thermometer reads from -20 degrees to +100 degrees, the full scale deflection = 100 degrees and the range = 120 degrees

If this is a single-phase motor, it may or may not be reversable. If it is, there should be a wiring diagram on the motors nameplate. If it just has two wires for power and no other changeable connections, it is probably not reversable. You can also look up the model number on the manufacturers website, you may find info there.

In series, each device creates a voltage drop related to the current and impedence of the device, therefore, the voltage for the devices in the circuit are not the same.

Addition:

Also, in a series circuit, if one device fails, all others in the circuit would also "turn off" - think older strands of Christmas lights.

Lets say for example that all the lights in your house were in a series circuit. When you turned the circuit on, all the lights would come on, but when you turn the switch off, all the lights would also go off (possibly useful when leaving for the day or going to bed). Now, one light bulb blows out...every light in the house would go out, leaving you to try replacing every light in the house until you found the correct one...in the dark.

Low Voltage

Iron losse are constant at all different levels of speed

sending voltage means voltage applied to source side.....

The symbol for the element lead is Pb. It stands for plumbum, the Latin name for the element lead.

Switches are used to isolate the supply voltage from the connected load. This isolation is needed to be able to work on equipment in the de-energized state. Without the switch in the circuit this could not be accomplished.

Assumption:

F= 60Hz

V= 1v is equal also to I=1amp.

PF= 0.85

Single Phase: Three Phase:

S = IV pf / 1000 S = 1.73 x I x V x PF/1000

= 1 x 1 x 0.85/1000 = 1.73 x 1 x 1 x 0.85 /1000

S = 0.00085KVA S = 0.0014705KVA

increases

It depends upon at how much voltage level 400 kvar capacitor bank is used.

The electrolytic capacitor can only have voltage across it in one direction. Failure to comply will result in catastrophic destruction of the capacitor.

The potential difference across two resistors connected in parallel to a battery with a potential difference of 6 volts is 6 volts.

Kirchoff's Voltage Law: The signed sum of the voltage drops in a series circuit is zero. This means that that the two series circuits involving the battery and each resistor have the same voltage across each other, and the series circuit involving the two resistors have the same voltage across each other.

sailant

Unitary PLC

Unitary PLC's are compact non adaptable systems which are connected directly to the machine or equipment they control. They are one self contained unit in which is house power systems, CPU, output and input controls and any specialised pieces of equipment needed within the system. Each unitary module will have one purpose and cannot be adapted or changed after construction.

Unitary PLC's are practical if used in an industry which rarely changes production techniques and requires only a small amount of PLC usage for singular specialised tasks.

However, if adaption maybe needed in the future this is not practical.

Plus unitary PLC's are cheaper and more compact than others.

Modular PLC

Modular PLC's are multi-adaptive systems that can be changed easily and simply. They consist of a cabinet or rail upon which a system is placed as standard. This standard system contains a power supply, CPU and input and output control. However, the PLC is not specialised like unitary PLC's it can be adapted and changed to serve different purposes or you may add more than one system so the module can be multi-functional.

Extra modules such as upgraded power supplies or CPU's and specialised modules maybe added to different sections.

These systems can be rail mounted or in cabinets for safety and security.

Modular PLC's are very practical machines in the fact they can be multi-functional and are completely adaptive and their functions can be easily changed. However, these systems are a lot larger and more expensive than unitary PLC's

Rack Mounted PLC

Rack mounted PLC's are basically compact rack mounted modular PLC'S. These are multi-adaptive and can be modified easily just as modular PLC's can be.

The main difference between these two is the rack mounted PLC is mounted on racks as seen by the diagram.

Rack mounted PLC's are the most practical of all three as they make the multi-adaptive features of the modular PLC's a lot more compact and able to fit out of the way in small places. This is ideal for industry where space can be vital.

However, there is one major impracticality which is that these are the most expensive of the three.

(THIS ALLOWED ME TO PASS MY FIRST ASSIGNMENT)

yes -- the input current still runs in the primary coil.

based on the pizoelectric effect. Change in resistance due to the force acting on it and convert it into 4 - 20 mA.

From the nameplate on the welder you find the amperage that the welder draws at the three phase voltage that you are going to use. This amperage is used to size the phase converter. This amperage is also used to size the breaker that will feed the phase converter and wire size for the installation.

The sampling rate must be at least double the highest frequency component of the

modulating signal in order to avoid frequency aliasing.

following specifications can b found in the name plate of a GT:: 1) HV rated voltage 2) LV rated voltage 3) Rated MVA (can be like "50Mva/40MVA" where 50 MVA is for OFAF and 40 for ONAF) 4) Vector group of the Trf. 5) operating freq. 6) Cooling system 7) LTC specifications 8) max core and winding temparature rise 9) class of insulation 10) % impedance 11) others including size(volm and wt) tank,oil etc. ...........Rahul