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this is because in dc is steady current......so when a DC supply says 220v it means max possible voltage is 220 V
but on the other hand the AC ratings are written in terms of RMS values so wen an AC supply says 220V ,then the max voltage actually is 220*1.414(i.e sq. root 2)= 311V approx....so u see AC limit has to be kept lower than DC
What else can I help you with?
When testing a power transformer with an ohmmeter which winding should have the largest ohmic value?
The higher-voltage winding has more turns (therefore its conductor will be longer) than the lower-voltage winding and, because it will carry less current, its conductors will have a lower cross-sectional area. Consequently, the higher-voltage winding will have a higher resistance than the lower-voltage winding.
Why might the unloaded output voltage of a transformer be higher than its rms of 12.6v?
Because the windings of transformers have resistance, the primary and secondary currents will cause voltage drops. To compensate for the drops, the transformer may have been designed to have a higher than specified output voltage when there is little or no output current. The no load output voltage typically is only slightly greater than the specified voltage. Before measuring the output voltage, measure the input (line) voltage. If it is not as specified for the transformer, calculate its effect on the output.
What is step up transformer?
To transmit a lot of electrical power, you either need a high voltage or a high current. But a higher current means your cables got hotter and you lose a lot of energy so is better to use higher voltage. To increase the voltage, we need to use a step up transformers. Step up transformers are transformers which has ability to increase the voltage and they have more turns on the secondary coil on the primary coil.
What is the acceptable voltage higher than 480v for a 480v inverter?
The voltage range should be marked on the case but without that information a 5% increase can be assumed, so 504 v.
Why is capacitive voltage higher than inductive voltage in an R-L-C circuit?
It isn't necessarily so. The capacitive voltage is the product of the current and capacitive reactance, while the inductive voltage is the product of the current and the inductive reactance. So it depends whether the capacitive reactance is greater or smaller than the inductive reactance!
What is the purpose of capacitor in power supply higher than rated voltage?
The voltage marked on a capacitor is its MAXIMUM SAFE WORKING VOLTAGE. The capacitor will work in a circuit at any voltage lower than that, but it may fail at any higher voltage.
What happens when a capacitor when it is connected to a higher voltage?
If you apply a higher voltage to a capacitor than it is rated it could over heat and explode.
Is higher voltage better for electronic devices?
Higher voltage is not necessarily better for electronic devices. Using a voltage higher than what the device is designed for can damage it. It is important to use the correct voltage to ensure the device functions properly and safely.
If the resistance in ohms is higher than the voltage what does that mean?
Voltage is not measured in ohms. It is measured in volts.
Which set of batteries will give the higher voltage: alkaline or lithium?
Lithium batteries typically provide a higher voltage than alkaline batteries.
What happens when diode is supplied with a voltage higher than RIV in reverse bias?
when diode is supplied with a voltage higher than RIV in reverse bias, the diode will burn out and will have zero resistance.
What will happen to a motor if it is supplied with lower voltage than its rated voltage?
The amperage to the motor will go higher.
Can Two or more batteries connected in series generate a higher voltage than one alone?
Yes, two or more batteries connected in series can generate a higher voltage than one alone.
What is buck boost converter?
Any device that outputs a voltage higher than its input voltage. This device can be capacitive, inductive, or other.
How to use a multimeter to safely test the voltage of live wires?
To safely test the voltage of live wires using a multimeter, follow these steps: Set the multimeter to the voltage setting that is higher than the expected voltage of the live wires. Turn on the multimeter and touch the probes to the live wires, ensuring that they are securely connected. Read the voltage displayed on the multimeter screen. If the voltage is within the expected range, you can safely disconnect the probes. If the voltage is higher than expected, take caution and seek professional help. Remember to always wear insulated gloves and goggles when working with live wires to prevent electric shock.
When testing a power transformer with an ohmmeter which winding should have the largest ohmic value?
The higher-voltage winding has more turns (therefore its conductor will be longer) than the lower-voltage winding and, because it will carry less current, its conductors will have a lower cross-sectional area. Consequently, the higher-voltage winding will have a higher resistance than the lower-voltage winding.
Why drop voltage in xlpe cable is more than PVC cable?
The higher voltage drop in XLPE cables compared to PVC cables is due to the different electrical properties of the materials. XLPE has a lower dielectric constant and higher resistivity than PVC, leading to a higher internal resistance and therefore higher voltage drop. Additionally, XLPE cables usually have a higher operating temperature, which can also contribute to increased voltage drop.
