Motor starting in hazardous zones — ATEX and IECEx certified
The 3RW5521-1HA06 carries both ATEX and IECEx certification, making it suitable for soft-starting motors in explosive atmospheres where standard starters cannot be used. This certification pair covers Zone 1/21 and Zone 2/22 installations across the EU and international markets. Trip class is selectable between CLASS 10A, 10E (default), 20E, and 30E per IEC 60947-4-2, giving the commissioning engineer control over the thermal stress profile during start-up. CLASS 10A is the fastest trip for high-inertia loads; CLASS 30E allows extended acceleration for heavy starts without nuisance tripping.
Voltage range and fieldbus integration
Rated 200-690 V, this soft starter covers 208 V, 400 V, 480 V, and 600 V nominal systems without a voltage tap change — one SKU for global panel builds. The wide input range simplifies BOM consolidation across plants running different line voltages. The starter also supports PROFIenergy in PROFINET environments for coordinated energy management during idle periods.
Integrated braking and motor protection features
DC braking, combined braking, and a breakaway pulse are built into the firmware — no external braking contactor or resistor needed for controlled stops on pumps and conveyors. The pump ramp-down function reduces water hammer in centrifugal pump applications. Motor heating function and torque control allow the starter to manage soft-start and soft-stop profiles for loads that require gradual torque application, such as crushers or mixers. The analog output (4-20 mA or 0-10 V) provides real-time motor current feedback to the PLC for load monitoring.
Panel integration and thermal derating
Dimensions are 306 mm height, 185 mm width, and 203 mm depth, with clearance requirements of 100 mm upward, 75 mm downward, 10 mm forward, 5 mm at the sides, and 0 mm backward. This compact footprint fits standard 600 mm deep enclosures with room for wiring ducts. For panels in non-conditioned spaces or near process heat sources, the derating curve must be applied to maintain full rated current — the starter's service factor of 1.15 provides some headroom at lower ambients.
Compliance and approvals for global installations
CE marking, UL approval, and CSA approval are all confirmed on this variant, covering installations in the EU, US, and Canada without additional certification steps. Accuracy Class 5 per IEC 61557-12 applies to the integrated metering functions. The event list, error logbook, and trace function provide diagnostic data for fault analysis and commissioning validation. Firmware updates are supported via the communication interface, allowing field upgrades without hardware replacement.