What this breaker does and where it fits
The Siemens 3VA1180-6EE32-0AA0-ZD00 is a 3-pole IEC frame 160 molded-case circuit breaker with a 70kA interrupting capacity at 415V (breaking capacity class H). It is configured for line protection with a TM220 thermal-magnetic trip unit, ATFM function, and a rated current In of 80A. Overload protection is adjustable from 56A to 80A, and the short-circuit protection is fixed at Ii = 10 x In. This variant includes a nut keeper kit and is specified for a DC Power OEM in China — meaning the breaker is built to a customer-specific BOM, not a standard catalogue item.
Engineering judgement on the ratings
The 70kA Icu at 415V means this breaker can safely interrupt fault currents up to 70kA without welding or rupturing — critical for high-fault-capacity installations where upstream SCCR coordination is required. The adjustable Ir (56–80A) lets you fine-tune the overload pickup to match the actual load current, reducing nuisance tripping on motor or transformer inrush. The fixed Ii at 10 x In (800A magnetic trip) is typical for line protection of cables and distribution; it is not suitable for motor-starting duty where a higher multiple (12–14x) is usually needed to ride through inrush.