Transformer wiring diagram - Dispose of cord “c”, if supplied, from starter’s manipulate circuit.?as discussed earlier in this book, if twine “c” is supplied at the starter (magnet coil voltages extra than 120v), you ought to put off it. This can convert the starter from common manipulate to split control. Whilst you are putting in a manage electricity transformer right into a starter, you should be sure that the magnet coil is rated for the equal voltage because the secondary of the transformer.?further, any pilot lighting in this circuit must have the same voltage as the secondary. The relationship of the voltage throughout the primary to the voltage across the secondary is in direct percentage to the range of turns on each windings.?for instance, a hundred turns at the primary, and 10 turns on the secondary, is a 10 to one ratio. If the primary is 500 volts, we can get 50 volts at the secondary. The schematic image for the transformer is represented via two agencies of “scallops” facing every different. These constitute the primary and the secondary windings. The winding with the higher number of turns must be shown to have extra scallops than the other to discover it as either a step-down or step-up transformer. This produces a magnetic discipline that extends outdoor the winding, inside the shape of concentric loops as proven in figure 2. The magnetic discipline fluctuates as the ac modifications route. Those magnetic traces reduce across the conductors of the secondary winding and induce a voltage.
The motor branch circuit is mostly a segment of a larger electrical distribution community in an commercial plant. The motor circuit materials the desired energy to the various manipulate devices in order for them to operate. In a few cases, the various manage gadgets are operated on the identical voltage as the motor. An average control transformer is proven in figure 1 beneath. It includes two separate coils of wire (windings) placed adjoining to each different on a not unusual iron center. Notice that the number one winding is attached to the electricity supply. The secondary winding is hooked up to the control circuit. The reason of the transformer is to switch electric powered energy from the primary circuit to the secondary circuit.