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What would the control voltage be for a transformer marked 240v 24vac?
Wiki User
∙ 14y ago
A control transformer marked 240V - 24Vac would have a control voltage of 24 volts.
Wiki User
∙ 14y ago
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How do you determine transformer turns ratio if the supply source and load is given?
Transformer turns ratio is the ratio of voltages between two windings. For instance, a 24VAC control transformer that runs on 120VAC will have a turns ratio about 5 to 1.
What is impedance voltage in a transformer?
Power transformers have an impedance (Z) rating that is listed in %. So the nameplate might state 5% Z for example. What this means is that when the secondary conductors are bolted together then 5% of the rated primary voltage is applied and will generate 100% current in flow in the secondary. Example: you have a 75KVA Delta-Wye 5% Z transformer with a 480V primary rating and 208/12 secondary rating. The amp rating of the secondary is 208A [75,000/(1.732x208)] So if you applied 24VAC to the primary with the secondary bolted together with busbar then you would have 208A of current flow.
What IS power factor on 40VA 24VAC?
There is insufficient information in the question to answer it. You need some other information, such as voltage to current phase angle, inductance, capacitance, or watts. Please restate the question.
What is the advantage of using the centre tapped full wave rectifier?
By using a center tap, with the tap connected to ground you can use one winding for the positive AC swing and the other winding (both relative to the center-tap) for the negative swing. Thus, when the secondary windings can be connected to the AC inputs of a full-wave-bridge rectifier to harvest a bi-polar DC power source. i.e. - a positive DC voltage 'rail' AND a negative DC voltage rail, say for example you have a 24VAC center tapped secondary of a 110VAC transformer. With a full-wave bridge, the center tap becomes the circuit 'ground' (aka 'return') in a DC circuit.
What is difference between 24vac and 240 v ac coil?
These are two different rating coils. I will not take 24V and 240V ac coils in this explanation, I will take low voltage ac coil and high voltage ac coil in the explanation in general. Low voltage ac coils have low insulation in general compared to the high voltage coils since we need more insulation for the high voltage coils. Low voltage ac coils have less no of turns and less diameter of coil compared to high voltage ac coils. But the thickness of the conductor used for the ac coil depends on the current rating of the coil only it does not depends on the voltage.
How do you determine transformer turns ratio if the supply source and load is given?
Transformer turns ratio is the ratio of voltages between two windings. For instance, a 24VAC control transformer that runs on 120VAC will have a turns ratio about 5 to 1.
What the reason for Compressor and condenser fan not starting?
ONLY COMMON POINTS TO BOTH ARE: LINE VOLTAGE TO COND. UNIT;FUSES, BREAKERS, DISCONNECT. LOW VOLTAGE TO CONDENSING UNIT CONTACTOR COIL; WIRING, T-STAT (NEED POWER COMING FROM Y and C), (24vac) in a call for cooling. CHECK FIRST AT AHU OR FURNACE CONTROL BOARD. JUMPER FROM R and Y to bypass t-stat. DO NOT JUMPER FROM "C" TO ANYTHING, THIS WILL BLOW FUSE OR TRANSFORMER. CONTACTOR (I'VE FOUND BUGS STUCK IN CONTACTS TOO) lc
What is the current for 24VAC with load of 30VA - which fuse to put in series If you can show the calculation?
I'm assuming these are RMS values. Power is equivalent to the voltage times the current: 30VA = 24*I I = 1.25A. If the load is 30VA, you should put in a fuse larger than 1.25A. If the transformer this is coming from is rated at 30VA, and the load is below this (say typically 20 watts resistive load), you may want to undersize the fuse to insure the transformer is protected.
What is impedance voltage in a transformer?
Power transformers have an impedance (Z) rating that is listed in %. So the nameplate might state 5% Z for example. What this means is that when the secondary conductors are bolted together then 5% of the rated primary voltage is applied and will generate 100% current in flow in the secondary. Example: you have a 75KVA Delta-Wye 5% Z transformer with a 480V primary rating and 208/12 secondary rating. The amp rating of the secondary is 208A [75,000/(1.732x208)] So if you applied 24VAC to the primary with the secondary bolted together with busbar then you would have 208A of current flow.
Will 24VAC be compatible with a 24 volt power supply?
yes it is compatible to use 24VAC to 24V supply
What IS power factor on 40VA 24VAC?
There is insufficient information in the question to answer it. You need some other information, such as voltage to current phase angle, inductance, capacitance, or watts. Please restate the question.
What is 24VAC?
24 volts of alternating current
What could cause a 24 volt transformer on a house heater to burn up?
On the 24vac side, this would include any load attached or powered by the transformer. A wire than has gone to ground (shorted), or rubbed into the ductwork (stat wire). The transformer will be rated at xxva, meaning volts X amps aka(watts). Most residential equip. will have a 40va fitted. 40 / 24= 1.66 amps. Any load in excess of this should cause a failure. If you are trying to fix this yourself, put a 2amp automotive fuse in series with one of the 24vac "out" leads and go one by one, isolating the gas valve, wiring to the thermostat, etc, till the fuse quits blowing. Otherwise, call a tech. lc
What does 24vac 4.8va equal in amps?
4.8va/24v = 0.2a
How do door chimes work and how do you repair them when they stop working?
This is accurate for old style electromechanical door chimes. I believe the procedures will work with electronic chimes, but I have no experience with them so it may not. Your door chime system consists of three parts: * A step down transformer. Ususally 120VAC->24VAC and commonly mounted near the breaker panel. This powers the system. * A button by the door. * The chime unit. These three parts are wires in series. When the button is pushed it completes the circuit from the transformer to the chime. The energy draws a plunger into a solenoid. The inerta of the plunger draws it past the energized resting position, striking a chime to make the "ding". The plunger then comes to rest, held in the solenoid. When the button is released a spring pushed the plunger back out. Again, inerta oushed the plunger past its true resting position, striking the chime to make the "dong". Note: You will need a AC voltmeter for this. * Locate the transformer. You should see 24VAC (check the transformer rating to verify this) across the output terminals. If you don't see this the transformer is the problem. Check that it is powered. If the transformer has power but us not putting out an output voltage the transfoemer has failed. * Take the cover off your chime. You should see three terminals: a common, a front door chime terminal, and a back door chime terminal. Check the voltage across the front door terminal and common. It should be 0V. Have a helper push the door chime button. The voltage should go to the voltage you read across the transformer. If these measurements are as expected the chime has failed. * Pull the button out. You should see the transformer voltage across the terminals when the button is not depressed. When the button is depressed the voltage should be 0V. If you short the terminals the chime should sound. If you can sound the chime by shorting the wires the button has failed. * If you think the chime is bad, disconnect the wire from the front door terminal and connect it to the rear door terminal. There are two solenoids in the unit, so this is a quick test case. The chime should now sound as normal, but only sound one tone. If so, the front door soleniod is bad. You will have to replace the whole chime. If not, there is a problem somewhere else. * If you can't track down the problem above, completely disconnect the wiring from the transformer and short the two wires together. Disconnect the two wires from the chime and short them together. Disconnect the switch and measure the continuity between them. If you see more than a few ohms, you have a break in the wire. Have you done anything that would cut a wire or cause it to break lately? * Somewhere there is a splice, usually at one of the three components, as you need two runs of two cinductor wire to connect the 3 components. Find this and check it. You can also disconnect it and test the two runs independently.
How do you convert 12volts power supply into 24volts?
For AC it is relatively simple from an electrical point of view. All that is required is a transformer. Even if there are other electronic solutions, unless there is good reason. Stick with the idea of a transformer since the only bad part about transformers, compared to other sophisticated electronic methods are: weight, size, stray magnetic fields but that's about all. They are robust and still very reliable and easy to use. They are available in high power units, they are easy to replace, easy to reconstruct and easy for anyone to understand it's function for later. Transformers can step-up or down voltage depending on the ratio of windings between the primary (input) and secondary (output). If you have access to a company that wind or make transformers (Most modern city areas have such companies) One can contact them for more advice. What you will need is your primary voltage, secondary voltage, the VA - VA is the Apparent Power which is the not the real average power since it does not include the power factor. It is only the volt(ac) x amps(ac) of the secondary. The general idea is that the power you apply on the input should be close to the power you get from the output, even though you do have some power losses (Eddie current, heat, ext.) Then you also need to specify the type of transformer. Normally an E-Core transformer can be used. E-core is a transformer with a metal core with laminations shaped like an "E" to reduce Eddie Currents. More information can be obtained from: http://en.wikipedia.org/wiki/Magnetic_core If you need 24Vac for a 100W lamp then the current will be 100W/24V = 4.16A so basically you need a (24V x 4.16A) =100VA step up transformer with 12V primary and 24V secondary in a E-core style. Also note that the primary current will then increase to 8.33A since 100W/12V = 8.33A. It might even be a little bit more but never less. One cannot create energy.
What is the advantage of using the centre tapped full wave rectifier?
By using a center tap, with the tap connected to ground you can use one winding for the positive AC swing and the other winding (both relative to the center-tap) for the negative swing. Thus, when the secondary windings can be connected to the AC inputs of a full-wave-bridge rectifier to harvest a bi-polar DC power source. i.e. - a positive DC voltage 'rail' AND a negative DC voltage rail, say for example you have a 24VAC center tapped secondary of a 110VAC transformer. With a full-wave bridge, the center tap becomes the circuit 'ground' (aka 'return') in a DC circuit.
