Electrical Engineering

PDB could stand for power distribution board, normally a low voltage (below 1000V) board used in industrial applications. Typically contains about 20 circuit feeds, each one will have a fuse or a Miniature Circuit Breaker for overcurrent protection of the circuit it feeds. Normally fed in the UK by a 3 phase 415V supply.

In a car the power supply is DC so all motors in cars work on DC. Also, AC motors are usually designed for 120 v or 240 v so they would not work on 12 v DC. So the answer is no.

The emitter

we can use the Out Put Capacitor Ex Kvar

The induction motor rotor has different frequency compared to it's stator. The rotor has slip ( s ) frequency.

slip = ( Synchronous speed - rotor speed ) / Synchronous speed

Synchronous speed = ( 120 * f ) / P

where f = supply frequency to the stator.

p = no of poles

rotor speed is the actual speed the motor is running.

Frequency in the rotor = slip * frequency in the stator

At starting rotor speed is zero, so slip is one.

Let us take the supply frequency is 50 Hz, then rotor frequency is also 50 Hz at starting.

The motor attains speed and runs with its full speed at a point of time.

Then let us take the slip is 0.04

then the rotor frequency will be 2 Hz.

yes you can

If the motor is connected to an ungrounded delta supply service there will be no effect on the operation of the motor. If the motor is connected to a wye system supply service and the B phase grounds out, the motor's overload protection would take the motor off line from the electrical supply.

The best way to find information about generators is to go to a hardware store and discuss both the household's needs and budget with an employee. Information about specific models of generators can also be obtained by contacting the manufacturer directly.

It is the same thing as the motor's rotor speed given in revolutions per minute.

A bonding line is a pre-arranged credit facility that a company can use to obtain bonding for specific projects. It allows the company to provide a financial guarantee to ensure completion of the project to the project owner.

A parallel circuit is used in common wiring practice because it allows one item to go out and the rest will remain on. Say that you had an office building. If every light bulb in the place was connected in series(every light bulb connected to the next on one current path), if one were to burn out, the circuit would break and all the other bulbs would go out. By using a parallel circuit, one bulb can go out and the rest can stay lit. Another reason that this occurs is because of the resistance involved in a series circuit. By connecting everything in one path, resistance to current will grow rapidly, so and current supplied to the circuit would be wasted by the resistance. Connecting in parallel gives multiple pathways for current to travel between devices and power sources, so the resistance is much lower, and more of the energy goes to powering the device rather than overcoming resistance.

An ampere is the actual amount of current flowing. See the Related Questions links for more information.

What does reduce engine power means?

In an ideal transformer the power in equals the power out there is no gain. In an ideal amplifier the power out equals the Gain *Power In.

An ideal transformer transforms energy at a ratio of its windings.

For example an ideal 1:10 ratio transformer (step up) would convert a 10Volt input at 10amps to a 100Volt output at 1Amp. Or conversely an ideal 10:1 ratio transformer (step down) would convert a 10Volt 10Amp input into a 1Volt 100Amp output.

Since Power = Voltage * Current we can see the power in equals the power out in an ideal transformer.

In an ideal amplifier the power out is greater than the power in. This is defined as the gain of the amplifier.

An ideal amplifier with a Voltage gain of 10 would take a 1Volt 1amp signal and amplify it into a 10Volt 1 amp signal.

An ideal amplifier with a Current gain of 10 would take a 1Volt 1Amp signal and amplify it into a 1Volt 10 amp signal.

Since Power = Voltage * current we can see the power in is less than the power out showing a gain in power.

A circuit with a 2 ohm resistor and a 4 ohm resistor in series with a 12 volt battery will have 2 amps flowing through each resistor. The current is the same in each resistor because they are in series, and a series circuit has constant current throughout.

The National Fire Protection Association (NFPA), a non-governmental trade association, publishes the NEC as well as other safety guidelines that may or may not be adopted by state regulatory agencies.

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: THERMOCOUPLE has the characteristic of both negative and positive temperature a room temperature it is still sensing the temperature it will not go to zero except for a specific temperature and that will change for each metal used

Less than or equal to 1KV comes under Low voltage.

The threshold voltage will be increased (in case of an N-Mos), because the charge in the depletion region formed under the channel will be more (high density) and hence gate voltage has to overcome this charge for strong inversion.

Vt = (work function difference of gate and substrate) + 2*(substrate Fermi voltage) + (Qd/Cox)

Where, Qd = charge in Depletion region in Coulomb

Cox = Oxide capacitance

All other things being equal, short wires. Longer wires cause the voltage to drop somewhat. The thickness of the wire also makes a difference - thicker wire can handle higher current, but the short/long principal is the same.

In reality if the proper motor protection is used, no motor should burn. Even a motor that has a locked rotor will trip the heater overload protection. So the issues to be looked at that would cause a motor to burn would be, is the motor protection correctly sized? The motor must be running within the manufactures specifications and not outside the motors service factor. The supply breaker and wiring to the motor must be the correct size. The overload protection should be in mid scale of the settings. House keeping around motors is a big condition to keep a motor running within its parameters. Cooling fins and fans must be kept clean of any debris. All of this should allow a motor to run free of trouble for many years.

For moving-iron instrument magnetic field is caused when the current (voltage) passes the fixed circle. When the current (voltage) passes the fixed circle，the two iron plates are magnetized ,rotational torque is resulted, the deflection angle indicate measured current. Because the magnetized polarity is same for AC or DC, moving-iron instrument can be used in AC and DC circuit. For permanent-magnet moving-coil instrument magnetic field is caused by the permanent-magnet, When the DC current passes the moving coil, rotational torque is resulted,so the deflection angle indicate measured DC current. As AC current passes the moving coil ,because inertia of moving parts of meter the deflection angle indicate rotational torque average, but rotational torque average is zero in cycle, moving parts of meter is´t deflec,so permanent-magnet moving-coil instrument only is used in DC circuit.