80K I presume is the temperature rise at rated load. Usually in degrees C, but K is equivalent to C when examining differences (rises).
IP55 is the degree of ingress protection. The first 5 means dust-protected. The second 5 means protected against water jets.
IC411 is the cooling. First 4 means frame or surface cooled. I think the first 1 means that the internal air flow is dependent on machine speed. The second 1 means the external air flow is also dependent on machine speed. In other words, I think this is totally enclosed fan cooled. Two fans... one for internal circulation and one for external.
Duty: SI - I'm not sure whether this might be inverter or intermittent?