Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← TechnologyWhich risk increases when a molded-case circuit breaker is applied in a three-phase system with high harmonic distortion?
A)Nuisance tripping due to peak current misinterpretation✓
B)Contact welding from increased DC component
C)Insulation breakdown due to elevated voltage spikes
D)Reduced interrupting capacity during fault events
💡 Explanation
When harmonic distortion is high, harmonic currents circulate which biases upwards, meaning the device approaches 100% rated trigger level sooner and nuisance tripping occurs disproportionately due to the peak current effect. Therefore nuisance tripping occurs, rather than contact welding, insulation breakdown or reduced capacity, all caused by other separate, non-distortion related failures.
🏆 Up to £1,000 monthly prize pool
Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.
Related Questions
Browse Technology →- Which outcome dramatically shortens LED array lifespan when constant-current drivers fail to compensate for thermally-induced voltage changes?
- Which outcome occurs when liquid fuel directly injected into a hot diesel pre-chamber incompletely vaporizes?
- Which outcome occurs when a gasoline direct injector (GDI) experiences excessive carbon buildup on the nozzle tip?
- Which risk increases when uneven cylinder wear occurs during operation of a piston air compressor?
- Which outcome occurs when a refrigeration system experiences refrigerant overcharge in a capillary tube system?
- Which consequence results when a PLC timing delay accumulates excessively in a robotic arc welding cell?