Transformers
The main purpose of a transformer is to
Change the output voltage
This transformer configuration is associated with the Triangle
Delta
Riser pathways should run perpendicular to lighting and be separated by a distance of at least
5 "
If my KVA on my primary is 14.4, the KVA on my secondary is
14.4
The windings in an autotransformer
share part of a winding
When AC flows through a transformer coil, the field generated around the coil is a
magnetic field
This transformer has the same line voltage and phase voltage
Delta
Fiber strands are made of
In a transformer with a turns ratio of 5:1,what will be the voltage on the secondary if the primary voltage is 120V?
24V
What type of transformer is normally able to handle a load that is much greater than its nameplate rating?
Buck n Boost
Converting voltage down is called
Stepping down or bucking down
This configuration looses voltage on the secondary, but not amperage
RJ-45 connectors used for UTP 4-pair cables are identified as
8P8C connectors
A tranformer has 500 turns in the primary and 250 turns in the secondary, what is the turns ratio?
2:1
Regulators are usually designed to provide a secondary voltage range of
±10% of the supply voltage
A symptom of a transformer with an open circuit is
no voltage output on the secondary
Each phase on this configuration is 120 ° out of rotation
WYE
The minimum size grounding conductor for fiber optic cable is
No. 14 AWG
Neutral busbars and connecting lugs are sized to carry
100%
What type of transformer is normally used with metering equipment when the current is too high for the metering equipment?
Current transformer
A dry transformer must be housed in a vault if rated at more than
35kV
This configuration can operate successfully with a missing leg
Open Delta
A structured cabling subsystem that connects buildings together in a multibuilding environment is called a(n)
campus backbone subsystem
The secondary thermal kVA rating of a conventional potential transformer rarely exceeds
1.5KVA
Which transformer is always single phase?
Current Transformer