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← TechnologyWhich risk increases when a heavily inductive motor is switched off if transient voltage suppression is absent within its supplying electrical circuit?
A)Reverse power flow occurs upstream
B)Electromagnetic interference becomes negligible
C)Arcing damage to switch contacts✓
D)System frequency remains abnormally high
💡 Explanation
Arcing damage to switch contacts increases because inductive loads resist sudden current changes, and a large voltage spike is generated by *inductive flyback* collapsing the magnetic field when the circuit is opened. Therefore, switch contacts are damaged, rather than the minor impacts on other parameters.
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