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I believe there is no simple way to calculate this based just on the transformer structure; this is best calculated once the transformer is built, on the basis of actual measurements with currents. You would have to measure input and output
currents and voltages, calculate the input and output power, and divide output power by input power. This might give a number like, say, 0.98. Subtract this from 1 (1 - 0.98 in this example), and you have the transformer loss (in this example, 0.02, or 2%).
Wiki User
∙ 10y ago
Wiki User
∙ 11y agoLet me assume that you are asking how you measure bus bar voltages. First, bus bar carry very high voltage and should not be tampered with. Any work on them must only be carried out by a qualified personel.
Answer: I mentioned that bus bars carry high voltage thus it will not be ideal or safe to measure it with normal volt meters. SO, use is made of an instrument transformer called a PT( Potential Transformer). It's actually a transformer because it steps down the voltage to a value that is safe for the volt meter.
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How you calculate the proper size of copper bus bar for 1200 Kw load?
You first have to find out what the load amperage is going to be and second, what is the working voltage.
Why the impedance of infinite bus bar is zero?
...because it is an infinite bus bar, meaning it can supply infinite current. By Ohm's law, since the voltage at the bus bar is fixed, to have infinite current, you must have a zero impedance.
To measure DC of big bus bar?
A: TO measure the current on any path you will need a very small known resistance in sires and measure the voltage drop across it. If the resistance i not small then inaccuracy of reading will be evident
What is an infinite bus bar?
A theoretical bus that can provide infinite amounts of current. This is often used in distribution level load studies - the distribution source bus is often modelled this way. The majority of voltage drop is due to the modelled distribution lines, and the step down transformers to the distribution bus often use load tap changers to keep the source voltage at the desired level anyway.It's a electrical term relating to power grids. See the Related Link below.
Is there a minimum value of contact resistance of bus bar or value per joints?
You want that as low as possible. Make sure all contacts are clean and if there is high current involved I would suggest a transfer paste. Whatever you decide is the resistance is can help you calculate the voltage drop across the connection and therefore the heat that will be created. You want as little loss there as possible. The resistance will change under load. (increase)
How do you rise voltage at the motor bus bar if the voltage drop too low?
It depends on why it is dropping too low.See discuss question below
What are the conditions for Synchronization of three phase alternator and bus bar?
voltage of incoming machine should be same as that of bus bar voltage
How can you calculate the copper bus bar according to the amp?
To obtain the amp of the copper bus bar, multiply the width of the bus bar by the thickness of the bus bar to obtain the current carrying capacity of the bus bar.
How you calculate the proper size of copper bus bar for 1200 Kw load?
You first have to find out what the load amperage is going to be and second, what is the working voltage.
Why the impedance of infinite bus bar is zero?
...because it is an infinite bus bar, meaning it can supply infinite current. By Ohm's law, since the voltage at the bus bar is fixed, to have infinite current, you must have a zero impedance.
How do you increase voltage of distribution bus bar?
A hybrid grid mini-system
How can calculate cu bus-bar breaking capacity?
Earthing busbar size
To measure DC of big bus bar?
A: TO measure the current on any path you will need a very small known resistance in sires and measure the voltage drop across it. If the resistance i not small then inaccuracy of reading will be evident
What is an infinite bus bar?
A theoretical bus that can provide infinite amounts of current. This is often used in distribution level load studies - the distribution source bus is often modelled this way. The majority of voltage drop is due to the modelled distribution lines, and the step down transformers to the distribution bus often use load tap changers to keep the source voltage at the desired level anyway.It's a electrical term relating to power grids. See the Related Link below.
How do you calculate bus bar size?
You just Calculate Size of Bus bar which has been mentioned below:Example: Calculate Size of Bus bar having Following DetailsBus bar Current Details:Rated Voltage = 415V,50Hz ,Desire Maximum Current Rating of Bus bar =630Amp.Fault Current (Isc)= 50KA ,Fault Duration (t) =1sec.Bus bar Temperature details:Operating Temperature of Bus bar (θ)=85°C.Final Temperature of Bus bar during Fault(θ1)=185°C.Temperature rise of Bus Bar Bar during Fault (θt=θ1-θ)=100°C.Ambient Temperature (θn) =50°C.Maximum Bus Bar Temperature Rise=55°C.Enclosure Details:Installation of Panel= Indoors (well Ventilated)Altitude of Panel Installation on Site= 2000 MeterPanel Length= 1200 mm ,Panel width= 600 mm, Panel Height= 2400 mmBus bar Details:Bus bar Material= CopperBus bar Strip Arrangements= VerticalCurrent Density of Bus Bar Material=1.6Temperature Co efficient of Material Resistance at 20°c(α20)= 0.00403Material Constant(K)= 1.166Bus bar Material Permissible Strength=1200 kg/cm2Bus bar Insulating Material= BareBus bar Position= Edge-mounted barsBus bar Installation Media= Non-ventilated ductingBus bar Artificial Ventilation Scheme= without artificial ventilationBus bar Size Details:Bus bar Width(e)= 75 mmBus bar Thickness(s)= 10 mmNumber of Bus Bar per Phase(n)= 2 NoBus bar Length per Phase(a)= 500 mmDistance between Two Bus Strip per Phase(e)= 75 mmBus bar Phase Spacing (p)= 400 mmTotal No of Circuit= 3 No.Bus bar Support Insulator Detail:Distance between insulators on Same Phase(l)= 500 mmInsulator Height (H)= 100 mmDistance from the head of the insulator to the bus bar center of gravity (h)= 5 mmPermissible Strength of Insulator (F')=1000 Kg/cm2
What is PV bus?
In power systems, there are 3 types of buses: swing bus, load bus and voltage controlled bus. PV bus is another name for voltage controlled bus.
Is there a minimum value of contact resistance of bus bar or value per joints?
You want that as low as possible. Make sure all contacts are clean and if there is high current involved I would suggest a transfer paste. Whatever you decide is the resistance is can help you calculate the voltage drop across the connection and therefore the heat that will be created. You want as little loss there as possible. The resistance will change under load. (increase)
