High Voltage Side And Low Voltage Side In Transformer
In a step up transformer the voltage coming out is higher than the voltage going in so the output is the high side and.
High voltage side and low voltage side in transformer. Someone once told me that in residential air conditioners heat pumps the high voltage side of a. In order to find out the low voltage and high voltage coil winding of the transformers we can use the lcr digital multimeter to measure the inductance value of the transformer. In the open circuit test the transformer rated voltage is applied to the low voltage side of the transformer with the high voltage side left open. Calculate the corresponding voltage and power factor as measured at the high voltage terminals.
If the phase to neutral voltage is 120 volts in a wye transformer system the phase to phase voltage would be. Actually if you ask that which side of the transformer is used for tapping then i will say both high voltage and low voltage sides because you may notice in smaller transformers like 240 12v 240 24v tappings are provided on low voltage side but in case of large transformers tappings are provided on the high voltage side of the transformer. Lower inductance value is the low voltage coil winding of the transformers whereas the higher inductance value signify the high voltage side of the transformers. Low voltage transformers can be used in control circuits that range from ringing the front door bell to sophisticated motor automation.
Connections for open circuit test. Compared to the high voltage side the low voltage side of a transformer draws current. A 460 v 2400 v transformer has a series leakage reactance of 37 2 ω as referred to the high voltage side. A load connected to the low voltage side is observed to be absorbing 25 kw unity power factor and the voltage is measured to be 450 v.
Low voltage transformers are for the most part single phased units with a voltage range on the high side primarily of 120 to 480 volts alternating current vac. Conduit conductor capacity is generally based on a fill ratio. The high voltage side has larger bushings whereas the lower voltage side has smaller bushings or even direct cable terminals. Measurement of power current and voltage are made on the low voltage side as shown in fig 4.
In residential split system air conditioners and heat pumps there are transformers inside both the condenser and the air handler that step the voltage down from 220 230 240 volts to 24 volts.