Line protection MCCB with communication and auxiliary switching
The Siemens SENTRON 3VA2163-5JQ32-0HL0 is a 3-pole molded case circuit breaker rated for continuous current of 63 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. The interrupting capacity tells the real story: 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. The adjustable thermal-magnetic trip unit is set from a minimum of 95 A to a maximum of 756 A, with an initial value of 16 A, giving the specifying engineer flexibility to tune the overload and short-circuit thresholds to the protected conductor or bus.
The communication function enables integration with a higher-level monitoring system for energy management or predictive maintenance.