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In a step up transformer how does the current drop if the voltage rises?
Wiki User
∙ 13y ago
Transformers are rated in KVA, both the primary and secondary windings have the same KVA rating. (KVA is the voltage multiplied by the amperage then divided by 1000).
If you have a 10 KVA step up transformer with 120V on the primary:
A = 10k / 120 = 83.33A
and if the secondary produces 240V:
A = 10k / 240 = 41.667A
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoA step-up transformer steps up voltage.
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When voltage increase then current will be?
it depends on what type of load. Motor amperage will drop off as voltage rises. loads such as lights will increase amperage with voltage rise.
What are causes of voltage drop in transformer?
An ideal transformer (one with no losses, and not a bad approximation for the real thing) has an input power equal to its output power. In simple terms, since power is the product of voltage and current, then for a given value of power, as the voltage goes up, the corresponding current will go down.
How do you calculate voltage drop for starting motor current and how to get the starting pf?
How do you calculate voltage drop for starting motor current
Can you use a transformer to compensate the voltage drop in a branch circuit?
If the voltage drop is excessive, it is a sign that the circuit conductors may be undersized. Better to install larger conductors. If you try to use a transformer, under light loads the voltage will rise to unacceptable levels, possibly damaging equipment.
What is short circuit voltage?
Short circuit voltage is the voltage that has to be applied to the primaries of a transformer, so that the nominal current flows through the secondaries, when they are shorted. This value is important, if transformer secondaries shall be used in parallel. Ideally all transformers with parallel secondaries should have the same short circuit voltage. When their short circuit voltages are different, the transformer with the lower short circuit voltage will be loaded more than their relationship of power ratings would predict. The short circuit voltage is also important in the design of a transformer, because it predicts, how much the secondary voltage will drop at nominal output current. This knowledge helps the designer to find out, how many further windings the secondary needs for a certain voltage in relation to an ideal transformer. Short circuit voltage is also known as impedance voltage.
Can you put a transformer on a 32 amp generate to drop the amps to 16 amps?
The purpose of a transformer is to transform one voltage to another voltage. This can be in the configuration of stepping up the voltage or stepping down the voltage . The load is what establishes what the current from the transformer is going to be.
When voltage increase then current will be?
it depends on what type of load. Motor amperage will drop off as voltage rises. loads such as lights will increase amperage with voltage rise.
What is the approximate voltage drop 120 if 10 gage solid copper coated wire is used?
Your question cannot be answered, as we do not know what type of wire the copper is coated on, nor do we know how long the wire is. But, let's assume that it is solid copper # 10 wire 100 feet long. The voltage drop is zero when there is no electricity flowing through it. (That is, 'current', measured in Amperes, or just Amps.) If there is, say, 1 Ampere of current, the voltage drop is close to 1/10th Volt in the 100 feet. If there is, say, 15 Amperes of current, the voltage drop is a tiny bit over 1-1/2 Volts. If you double the wire's length, the voltage drop also doubles, and if the current doubles, the voltage drops also doubles. Or, as in my example, above, if the current rises by 15 times, then the voltage drop rises by 15 times.
What is inherent voltage regulation of an onload tap changer for power transformer?
depending on the amount of the load of transformer as well as the power factor of it, there is a transformer specific voltage drop at its terminals, due to the internal impedances. The on-load tap changer can / will be used to compensate this voltage drop or rise.
What are causes of voltage drop in transformer?
An ideal transformer (one with no losses, and not a bad approximation for the real thing) has an input power equal to its output power. In simple terms, since power is the product of voltage and current, then for a given value of power, as the voltage goes up, the corresponding current will go down.
How do you calculate voltage drop for starting motor current and how to get the starting pf?
How do you calculate voltage drop for starting motor current
Does a resistor drop current or voltage?
A resistor drops both voltage and current, however the term "drop" is generally used to indicate a voltage or current drop across the device, so it is more correctly stated that a resistor drops voltage, by allowing the current in the circuit to decrease.
What is the voltage drop across a resistor of 300 kilo ohm?
What is the amount of current flowing through the resistor? Voltage drop is dependent on the current. Ohm x Amps = Voltage drop
What is the effect of transformer impedance on regulation?
The lower the impedance, the lower the voltage drop across the transformer as it is loaded. This means regulation is better, since voltage variance is smaller.
What do you mean by no load of transformer?
Transformers voltage ratings are typically at full load. For instance, A 24 VAC, 10A transformer will have a terminal voltage of 24 when it is feeding 10 amps to a load. Since the transformer windings have some resistance, the transformer designer has to wind the transformer to put out more than 24 volts, since some of the voltage will be lost, dropped across the resistance of the secondary windings. But, according to Ohm's law, the voltage dropped across a resistance is proportional to the current (E=IR). If we take away the 10A load, there is no current, and therefore no winding voltage drop! The excess voltage the designer built in now appears at the terminals. This is the no-load voltage. In my example above, when we remove the 10A load, the output voltage of the transformer might rise to 26.4V. We would say the no-load voltage of that transformer is 26.4V The ratio of full-load voltage to no-load voltage is called the transformer's "regulation factor". It is calculated as: (no-load voltage - full-load voltage) / full-load voltage * 100. Ours is: ((26.4 - 24) / 24) * 100 = 10%.
What is the effect of low impedance transformer on regulation?
The lower the impedance, the lower the voltage drop across the transformer as it is loaded. This means regulation is better, since voltage variance is smaller.
Can you use a transformer to compensate the voltage drop in a branch circuit?
If the voltage drop is excessive, it is a sign that the circuit conductors may be undersized. Better to install larger conductors. If you try to use a transformer, under light loads the voltage will rise to unacceptable levels, possibly damaging equipment.
