240 A minimum current, Trip Class 10A/10E/20E — what it means for motor starting
The 3RW5077-6AB15 soft starter has a minimum settable current of 240 A, which sets the lower bound of the motor full-load current it can protect. The Trip Class is configurable as CLASS 10A, 10E (preset), or 20E per IEC 60947-4-2 — this determines how long the overload protection allows the motor to draw starting current before tripping. CLASS 10A suits normal-start applications like pumps and fans;. Rated operating voltage spans 200 to 600 V, covering standard low-voltage motor systems globally. The soft starter supports Voltage Ramp, Soft Torque, and Pump Ramp Down profiles — the Pump Ramp Down feature gradually reduces voltage on stop to prevent water hammer in pumping stations.
ATEX, UKEX, IECEx — hazardous-area motor starting
The unit carries ATEX, UKEX, and IECEx certification, meaning it is approved for use in potentially explosive atmospheres when installed per the applicable installation codes. This is a key differentiator for soft starters in oil & gas, chemical processing, or grain handling — the certification covers the starter itself, not just the motor it controls. CE marking, UL approval, and CSA approval are also present, so the part is accepted in both North American and European jurisdictions without additional agency review.
Multi-protocol fieldbus — PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP
The 3RW5077-6AB15 supports PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP natively, plus PROFINET with the optional communication module. The analog output is configurable as 4–20 mA (default) or 0–10 V when used with the High Feature HMI accessory. An error logbook is available only with special accessories — useful for troubleshooting intermittent trip events.
Mounting and thermal derating — panel integration notes
Mounting is by screw fixing — no DIN-rail adapter, so plan for direct panel mounting with the 160 x 230 x 282 mm footprint. Clearance requirements: 100 mm upward, 75 mm downward, 10 mm forward, 0 mm backward, 5 mm at the sides. In a sealed enclosure with other heat-generating devices, factor the derating into the continuous current rating — the soft starter's internal semiconductor junction temperature governs the actual output capability above 40 °C ambient.