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What is residual voltage of lvdt?

Residual voltage in a Linear Variable Differential Transformer (LVDT) refers to the small voltage that remains at the output when the primary coil is energized, but there is no displacement of the core. This voltage can arise from imperfections in the LVDT's construction or external factors and may affect the accuracy of measurements. Ideally, the residual voltage should be minimized or compensated for to ensure precise readings.


Does a power transformer hold residual power?

Yes, a power transformer can hold residual power, primarily in the form of residual voltage or charge stored in its windings and capacitance. After disconnection from a power source, this residual energy can remain for a short period, potentially posing a shock hazard. It's essential to properly discharge transformers before maintenance or inspection to ensure safety.


What is a transformer that increases voltage?

A transformer that increases voltage is a step-up transformer.


The incoming voltage from the current source to the transformer is called what?

The incoming voltage from the source to the transformer is called primary voltage.


Why transformers take high input current at start?

Inrush current is a result of core saturation. The magnetic flux in the core of a transformer is 90 degrees out of phase with the voltage. Ideally the transformer switching device will be closed at a peak voltage, and the transformer core will have no residual flux from the last close. If this occurs, the flux in the core in the first cycle will be no larger than it normally would be. If the switching device closes at a zero voltage, or there is some residual flux, the transformer's core will be driven into partial saturation within the first cycle, unless it has been oversized to prevent saturation. Decreasing the applied voltage at energization will keep this from occuring. One method is to use pre-insertion resistors which cause a voltage drop to the transformer that is significant enough to prevent saturation within the first few cycles, and then they are removed. Another method is to de-engerize the transformer core, and close at voltage peaks only (controlled closing).


What is meant by residual voltage in a dc generator?

poles are partially magnetized this causes some voltage called residual voltage


What is the main different between the power transformer and voltage transformer?

Voltage Tarnsformer transforms only voltage. While power transformer transforms both voltage and current.


When is a step up transformer used in relationship as to when a step down transformer is used?

If the voltage needs to be increased from a lower voltage to a higher voltage a step up transformer is used. If the voltage needs to be lowered from a higher voltage to a lower voltage a step down transformer is used.


What is voltage regulation of Transformer?

The change in output voltage from no load to full load defines the voltage regulation of that transformer.


Why the capacitive voltage transformer and voltage transformer both are used in a substation?

three phases


What is the difference between a step-up transformer and a step-down transformer in terms of their voltage conversion capabilities?

A step-up transformer increases voltage, while a step-down transformer decreases voltage.


What is a transformer called that increases voltage?

A transformer that increases voltage is a step-up transformer.