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Why are distribution transformers frequently designed to develop maximum efficiency at loads that are somewhat lower than rated value?
It is always desirable to run any equipment or device at maximum efficiency for that matter, not only the power transformer. Power transformer maximum efficiency occurs when copper loss is equal to iron loss. (or no load loss equals to load loss). This does not necessariliy mean that maximum efficiency occurs at maximum or full load. Generally the maximum efficiency occurs at relatively less than full load of the transformer.
What are advantages of high power factor?
Power factor ranges from zero to a maximum of 1. At 1 the current and voltage waveforms are in phase and operate at maximum efficiency.
What is maximum efficiency of stirling engine?
78%
What is the efficiency of a 12 volt electric motor?
Efficiency of any electrical machine is maximum when the load on that machine is such that the variable loss ( copper loss) is equal to constant loss (eddy current loss, hysteresis etc).the same applies to dc machines too.
What is the final stage of a transmitter in telecommunication?
The power amplifier that drives the antenna. In CW transmitters and some AM transmitters this stage is also the modulator, in others (and in non-AM transmitters) the modulator is in an earlier stage.
Which power plant has maximum efficiency?
thermal
Why are distribution transformers frequently designed to develop maximum efficiency at loads that are somewhat lower than rated value?
It is always desirable to run any equipment or device at maximum efficiency for that matter, not only the power transformer. Power transformer maximum efficiency occurs when copper loss is equal to iron loss. (or no load loss equals to load loss). This does not necessariliy mean that maximum efficiency occurs at maximum or full load. Generally the maximum efficiency occurs at relatively less than full load of the transformer.
When is efficiency of 3phased Induction motor maximum what is the condtion for maximum efficiency in induction motor?
It is maximum at about 75% to 100% of the motor rated load. Efficiency is maximum at unity power factor , when R=X and when variable losses Is equal to constant losses at rated load.
When a source is delivering maximum power to load the efficiency of the circuit is always?
50%
What are advantages of high power factor?
Power factor ranges from zero to a maximum of 1. At 1 the current and voltage waveforms are in phase and operate at maximum efficiency.
Why amplitude modulation is called as collector modulation?
amplitude modulation using collector modulator gives:More symmetrical envelope• Higher power efficiency• Higher output power• Need higher amplitude modulatingsignal
When is the efficiency maximum in a transformer?
the efficiency is maximum in a transformer when no load loss is equal to load loss.
Why instead of transmitting maximum power power utility transmits power at maximum efficiency?
This question relates to the economic decisions that electricity utilities make in designing their power networks. During peak load periods, power is transmitted at the maximum current that is safe for the network, but at other times power transmission simply depends on demand. Ideally, utilities would transmit power at maximum efficiency because, by minimising losses over the lines and in transformers, they minimise generation costs. However, each increase in efficiency results in increased capital costs. A compromise is always made between purchasing efficient power transformers and distribution transformers or less expensive ones with higher losses.
Why instead of transmitting maximum power power utility transmit power at maximum efficiency?
This question relates to the economic decisions that electricity utilities make in designing their power networks. During peak load periods, power is transmitted at the maximum current that is safe for the network, but at other times power transmission simply depends on demand. Ideally, utilities would transmit power at maximum efficiency because, by minimising losses over the lines and in Transformers, they minimise generation costs. However, each increase in efficiency results in increased capital costs. A compromise is always made between purchasing efficient power transformers and distribution transformers or less expensive ones with higher losses.
What is maximum power transfer theorem?
Max efficiency of energy transfer can only occur when impedence source matches the impedence of the load.
What is maximum efficiency condition in distribution transformer?
The maximum efficiency condition in distribution transformer is said to be occurred when iron loss = copper loss
What is the rate of heat output of a Carnot engine?
Power Output / [(1/Thermal Efficiency) - 1], where Thermal Efficiency = 1 - Tc/Th
