Electrical Systems & Wiring Flashcards
7 cards from real SAW practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Electrical Systems & Wiring flashcards as text
What is the purpose of the inductance control on a SAW power source?
Answer: To control the rate of current rise and arc stability
Inductance controls the rate of current rise during short circuits, smoothing arc behavior and reducing spatter in SAW operations.
Which type of electrical connection produces deeper penetration in SAW: electrode positive (DCEP) or electrode negative (DCEN)?
Answer: DCEP produces deeper penetration
DCEP (reverse polarity) drives more heat into the base metal, resulting in deeper weld penetration compared to DCEN.
A SAW system shows erratic wire feeding and unstable voltage readings. The most likely electrical cause is:
Answer: Worn or contaminated contact tip causing poor electrical contact
A worn or contaminated contact tip creates inconsistent current transfer to the electrode wire, causing erratic arc behavior.
In a SAW multi-wire system, the trailing electrode is typically connected to:
Answer: AC to reduce arc blow interference between electrodes
The trailing electrode in multi-wire SAW is typically on AC to minimize magnetic arc blow caused by interaction between DC magnetic fields.
What does the term 'arc voltage' specifically measure in a SAW electrical circuit?
Answer: The voltage drop across the welding arc between electrode tip and weld pool
Arc voltage is the actual voltage measured across the arc gap between the electrode tip and the molten weld pool.
When using a constant current (CC) power source for SAW, what controls the wire feed speed?
Answer: A separate voltage-sensing wire feeder that adjusts speed to maintain arc length
With a CC source, a voltage-sensing wire feeder automatically adjusts feed speed to maintain a consistent arc voltage and arc length.
What is the function of the work clamp (ground connection) in a SAW electrical circuit?
Answer: It completes the welding circuit and carries the full welding current back to the power source
The work clamp completes the welding circuit, allowing full welding current to return from the workpiece to the power source.