What is nameplate voltage?

What is nameplate voltage?

Voltage. Nameplate-defined parameters for the motor such as power factor, efficiency, torque and current are at rated voltage and frequency. When the motor is used at other voltages than the voltage indicated on the nameplate, its performance will be affected.

How do you calculate motor current rating?

“Now the formula,which you know, KWH = Line Current * Line Voltage * Power factor can be applied. The only unknown value ‘current’ can be calculated.” You must not use de time, as P= dW/dt, the correct is kW = Line Current * 1,73*Line Voltage * Power factor * efficiency.

What is a tri voltage motor?

Tri-voltage motors (e.g., volt [V]), are designed to produce rated torque at each voltage, but will slip more and operate hotter at 208 V than at 230 or 460 V. This reduces a motor’s ability to produce sufficient starting torque and increases acceleration times.

How is transformer rated voltage calculated?

How to Calculate the Rating of Transformer

1. For single phase transformer: VA Rating = V x I.
2. For three phase transformer: VA Rating = √3V x I.
3. = ( V X I ) / 1000 ………..(
4. = (√3V X I ) / 1000 ……..(
5. A nameplate of three phase transformer has the following parameters:
6. Transformer rating = 100 kV.
7. Primary voltage or H.V.= 11 kV Primary current= 5.25 A.

How do I choose a transformer size?

How to Size a Transformer

1. Transformer size is determined by the kVA of the load.
2. Load voltage, or secondary voltage, is the voltage needed to operate the load.
3. Line voltage, or primary voltage, is the voltage from the source.
4. Single-Phase has two lines of AC power.

What is the rated voltage of a transformer?

Or it is just the 2200 V as mentioned in rating? The primary rated voltage is that at which the transformer can pass maximum power. If the primary voltage is reduced then you will no longer be able to get the same VA out of the secondary. Power output will be reduced.

How do you calculate the full load voltage of a transformer?

Transformers on-load

1. VS(no-load) = ES
2. VS(full-load) = ES – ISR – ISX.
3. or VS(full-load) = ES – IS(R+jX)
4. ∴ VS(full-load) = ES – IS*Z.
5. Vdrop = IS(RcosΦ + XcosΦ)
6. if cosΦ = 0.85, Φ = cos-1(0.85) = 31.8o ∴ sinΦ = 0.527.
7. IS = VA/V = = 90.9 Amps.

What will happen if a DC voltage is given to the transformer primary?

When a DC voltage is applied to the primary winding of a transformer, due to low resistance, the winding acts as a short circuit across the terminals of the DC source that lead to the flow of heavy current through the winding resulting in overheating of the winding.

Why is motor rated in kW?

Motor is rated in kW since it specifies the capacity of the motor to drive its load. It is the active power (kW) that is of interest when a motor drives a load. The motor converts the active power that it draws from the mains into mechanical power that the load consumes/demands. Thus, a motor is rated in terms of kW.

What is kW rating of motor?

Three Phase Motors

MOTOR RATING	HP
0.37 kW	1/2	2.3
0.56 kW	3/4	2.8
0.75 kW	1	3.2
1.1 kW	1.5	4.5

How do you calculate motor current from kW?

AC three phase kilowatts to amps calculation formula

1. I = 1000 × P / (√3 × PF × VL-L )
2. amps = 1000 × kilowatts / (√3 × PF × volts)
3. A = 1000 × kW / (√3 × PF × V)
4. I = 1000 × 0.33kW / (√3 × 0.8 × 110V) = 2.165A.

What is difference between HP and kW?

James Watt is also the reason we have the measurements watt and kilowatt, most commonly used to measure electricity. Obviously, a kilowatt is 1,000 watts. To convert kilowatts to horsepower, we multiply the number of kilowatts by 1.34. The result is that 80 kilowatts is roughly equivalent to 107 horsepower.

How many horsepower is the average human?

When considering human-powered equipment, a healthy human can produce about 1.2 hp (0.89 kW) briefly (see orders of magnitude) and sustain about 0.1 hp (0.075 kW) indefinitely; trained athletes can manage up to about 2.5 hp (1.9 kW) briefly and 0.35 hp (0.26 kW) for a period of several hours.

How do you calculate kW to HP?

In order to convert kilowatt-hour (kWh) to horsepower (hp) you need to know the total number of hours that the engine was running for (i.e the maximum number of hours that it can run on one charge). Formula is (kWh)*(1./(hours) = (hp).

What is the formula of kW?

Need to Find:	Formula
Kilowatts	(Volts x Amps x PF x 1.732)/1000
Amperes DC	Watts / Volts
Amperes AC	(746 x Horsepower)/(Volts x eff x PF x 1.732)
KVA	(Volts x Amps x 1.732)/1000

Is 200 hp good?

Under 200 Horsepower Horsepower is undeniably attractive, and these days even the most basic vehicles have the horsepower necessary to pass most vehicles on the highway. As such, horsepower under 200 can be quite good. This level is sufficient for drivers who don’t actively seek road thrills.

How long will 1500VA last?

A UPS with a 1500VA rating can keep a computer running for less than an hour. You’re lucky to have more than 10 minutes of running time when running a PC, network team and monitor. So, in general, you can use UPS as a backup power source for not long.

Should I turn off my ups at night?

Yes, it will shorten the life expectancy of its batteries. Every night, with the UPS unplugged, the batteries self-discharge. Every day, when you plug the UPS back in, the batteries have to charge back up to compensate for the self-discharge. It is better to make off from ups switch.

How long can a UPS power a router?

For router 600VA built in battery UPS is more than enough. It can give power to your router approx 15 minutes to 20 minutes. If you need more than that time, you have to go for 1000VA. On this UPS your router can run 1hour to 1hour 30 minutes.