General Flashcards
(25 cards)
Backfeed
Voltage supply from the load side
Neutral
Current carrying conductor at or near ground potential that acts as a return for unbalanced load
Transformer
Electrical ratio device that works on the principle of mutual induction, that bucks or boosts primary voltage to the secondary voltage.
Orange
4 ACSR
ACSR
Aluminum Conductor Steel Reinforced
AAC
All Aluminum Conductor
Red
2 ACSR
Yellow
1/0 ACSR
Blue
6 ACSR
What to do first before heating up a new service?
Check voltages on transformer
Which way does the pole brand face on a dead end?
Away from the strain of the conductor wires.
Purpose of a lightning arrestor?
To divert over voltage from the main system
Give voltage surge a path to ground
Why do we make our neutral connections first, always?
So linemen and equipment are protected
To avoid severe fluctuations in voltage to consumer.
4 ways of cooling a transformer?
- Mineral oil
- Air
- Fins
- Fan
What size secondary leads are required for a 25 Kva transformer?
50 Kva?
2 Stranded
4/0
When is a fault indicator activated?
When it detects a constant fault
When it is in a over current situation
4 methods of sagging wire
- Line of sight
- Sag scope
- Dyno
- Corn field
3 methods of testing rubber gloves
- Water
- Air
- Visual
What must be done before climbing above a de-energized transformer?
Isolate the secondaries to avoid any potential backfeeding
What is a guy breakers (fish) purpose?
Public protection
What does PCB stand for?
PolyChlorinated Biphenils
On underground cable, the voltage rating is based on what?
Depth of insulation
What does raking a pole mean?
Plumbing the pole against tension
When dressing out a cutout, what do you need?
4 Bird Wire
