What this choke does in a drive cabinet
The Siemens 4EU2552-8UA00-0AA0 is a three-phase mains choke (line reactor) sized for frequency converter input circuits. It sits between the supply and the drive rectifier, smoothing current harmonics and limiting inrush peaks so the drive doesn't hammer the upstream transformer or trip nuisance breakers. Rated for 224 A maximum AC current and 202 A continuous operational current at 400/480 VAC, 50-60 Hz, this choke handles the full input of a 110–132 kW drive class (depending on line voltage and motor load profile). The 62 µH inductance (0.0629 mH) with a 2% relative inductive voltage drop means it provides moderate harmonic attenuation — enough to meet typical IEEE 519-2014 guidelines for a 6-pulse drive without over-sizing the reactor for the cable charging current.
Thermal and mounting reality — IP00, Class H, 186 W to shed
IP00 means no enclosure — this choke is an open-frame component intended for a ventilated cabinet. It sheds 186 W total loss (134 W copper + 52 W iron core) at rated load, so plan for forced air or natural convection with at least 100 mm clearance around the sides and top. The 0.225 m width and 0.176 m depth footprint fits a standard 600 mm deep panel, but the 0.21 m height needs vertical rail space. Class H insulation (180 °C) means the winding can survive sustained overloads that would cook a Class B or F choke — useful if the drive occasionally pulls above nameplate for short-duration loads like crusher start or conveyor breakaway. The 40 °C ambient rating is standard; above that, derate the current per IEC 60076-6. Termination is flat-type connectors (bus-bar style), not ring lugs or spring cages. The panel builder needs to plan for bolted copper bars or compression lugs sized for 224 A — no quick-connects here.
Lifecycle and compliance — active, UL/CSA, EN 61558
It carries UL/CSA recognition per the description and is designed to EN 61558-2-20 (safety of transformers, reactors, and power supply units). That covers the insulation coordination and short-circuit withstand for industrial installations. RoHS and REACH compliance is standard for Siemens industrial components from this era.