The Siemens SENTRON 3VA2216-5KP32-0AA0 is a 3-pole molded case circuit breaker rated for a continuous current Iu of 160 A, with the same 160 A hold from 40 °C through 70 °C — no derating curve to chase across the panel ambient range. The ETU850 electronic trip unit handles line protection (overload and short-circuit) and includes a communication function for integration into a plant-wide monitoring scheme.
Breaking capacity that keeps selectivity
At 690 V AC the rating drops to 4.5 kA, which still covers most 690 V motor control center bus faults.
Trip unit and neutral protection
The N-conductor protection is adjustable from OFF through 20 % to 160 % of the phase setting — useful for 4-wire systems where the neutral may carry harmonics or unbalanced current.