Which of the following is NOT true for the power supply for the arc welding ?

Power factor is high
Heat is developed due to arc between electrode and work piece
Power supply can be AC or DC
High voltage power supply is required

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 1 : Power factor is high

Requirement of power supply for electric arc welding:

Both AC and DC can be used in arc welding.
Usually, 70-100 V on the AC supply and 50-100 V on the DC supply system is sufficient to strike the arc in the air gap between the electrodes.
Once the arc is struck, 20-30 V is only required to maintain it.
Arc welding transformer is also designed to have a high leakage reactance so as to stabilize the arc during the welding process.
Due to the high leakage reactance power factor of the welding transformer is very low the order of 0.3 to 0.5 lagging.

4 views Answered 2022-09-04 04:29

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