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Ask any electrical engineer to name the most critical part of a low voltage switchgear assembly, and the answer will likely be the circuit breaker. Or perhaps the disconnect switch. Maybe the busbar system. Rarely does anyone mention the accessories. Yet experienced maintenance teams know a different reality: a switchgear system fails more often at the auxiliary contact, the terminal block, the interlock mechanism, or the indicator light than at the main power path. The circuit breaker may be the heart of the switchgear, but the accessories are the nervous system.