Transformers

On a 7200/12470 system with a 12470GRDY/7200 transformer what do you attach the H2 bushing to

• System neutral

• Pole ground

• Nothing

• Second phase for a phase to phase hook up

For testing turns ratio

• The low input voltage must be connected to the high voltage winding

• The high input voltage must be connected to the high voltage winding

• The high input voltage must be connected to the low voltage winding

• The low input voltage must be connected to the low voltage winding

Why is the serial number on a name plate important

• For the warehouse inventory

• For the system maps information

• Because your Foreman said so

• Monica

Total opposition to current flow is

• Resistance

• Ohms

• Impediment

• Impedance

What happens if the wrong transformer is chosen for the job

• Nothing

• Possible fire

• Melt line

• Increase or decrease of secondary voltage

Do all distribution transformers have tap changers

• True

• False

What does Travis Christensen say a transformer name plate is used for

• Store, transport, install, maintain, inventory

• Transport, install, maintain, inventory

• Store, transport, maintain, install

• Just for Warehouse and system maps

What should you always check the nameplates for?

• kva

• Polarity

• Serial number

• Weight

• Wiring schematic

What does “TLC” means in TLC Meter

• Tap load changer

• Transformer load chronograph

• Transformer last check

• Transformer latency chronograph

What should you check a transformer for before installing

• Continuity

• Correct primary coil voltage

• Correct secondary coil voltage

• Correct rotation when in a 3 phase connection