Transformers Flashcards
Which type of current makes a transformer work?
AC
How is a voltage produced on a transformer’s secondary coil?
The magnetic field cuts across the secondary coil, inducing a voltage
List 2 types of transformer construction
- Shell
- Core
What is the principle purpose of a transformer?
To raise or lower the value of an AC voltage
What is the purpose of the laminated soft iron core?
To achieve the maximum transfer between primary and secondary windings
If there are more coils in the secondary windings, what type of transformer is it and what will happen to the output voltage?
It’s a step-up transformer so the output voltage will be higher than the input voltage
What is the output voltage equation?
Output Voltage = (Number of Secondary Turns)/(Number of Primary Turns) x Input Voltage
What is the purpose of a centre tapped transformer?
It effectively reduces the electric shock hazard by halving the voltage
What are the input and output cables on HM Ships?
- Red L1
- Yellow L2
- Blue L3
What are the new colour codes?
- Brown
- Black
- Grey
Label diagram
Why won’t transformers work with DC current?
Because there is no change in the magnetic field
