NEW
Font size
WorksheetsUnderstanding Transformer Concepts
Total questions: 12
Worksheet time: 6mins
What determines the polarity of a transformer?
The direction the secondary coil is wrapped
The color of the wires
The size of the transformer
The type of insulation used.
The polarity of a transformer can be either ______ or subtractive.
Additive
Multiplicative
Divisive
Subtractive
What happens if a transformer has an impedance of 2% at full load?
The secondary voltage will be limited by 2%
The primary voltage will increase by 2%
The transformer will overheat
The transformer will shut down.
Prior to installation, lineworkers always refer to the ______.
Manual
Nameplate
Blueprint
Circuit diagram
If the polarity is additive, where will the x1 bushing be?
On the left-hand side
On the right-hand side
At the top
At the bottom
The oscillation of the magnetic field in respect to the core creates which type of loss?
Copper loss
Iron loss
Heat loss
Sound loss
What is the acceptable impedance range for transformers when banking or paralleling?
+/- 5%
+/- 7.5%
+/- 10%
+/- 12.5%
CSP transformers have internal fuses that protect against ________.
external faults
internal faults
voltage surges
weight issues
What is the purpose of the internal secondary breaker in a CSP transformer?
To increase voltage
To disconnect hot legs during overload
To adjust impedance
To change oil levels.
What is the location of fuses in padmount transformers?
Externally
Internally
On the nameplate
Under the mounting bracket
What should be determined for rigging purposes of a transformer?
Voltage
Impedance
Weight
Color
What is the primary function of the internal fuses in CSP transformers?
To isolate and protect from internal faults
To increase voltage
To adjust impedance
To change oil levels
