Three poles, line protection version.
Breaking capacity is 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 40 kA at 690 V. That 242 kA at 240 V covers high-fault utility feeds; the 40 kA floor at 690 V still handles most industrial motor branch circuits.
