What does the integrated C2 EMC line filter provide at the 3 kW power level?

The AB0 variant embeds a Category C2 line filter per EN 61800-3 directly into the drive enclosure. At 3 kW, the filter is sized to attenuate conducted emissions from the inverter stage across the 150 kHz to 30 MHz frequency band, ensuring the drive can connect to an industrial low-voltage public network without an external filter module. For conveyor system integrators, this means each 3 kW drive node is independently C2-compliant — you do not need to calculate system-level filter sizing for a daisy chain of mixed-power G115D units. The filter adds no external footprint: it occupies space already allocated within the FSB enclosure, so the drive dimensions (425x180x134 mm) are identical to the unfiltered AA0 variant.

Why does the 3 kW FSB remain fanless while the 4 kW FSB requires a fan?

The thermal boundary between fanless and forced-air cooling in the G115D FSB frame falls between 3 kW and 4 kW. At 3 kW, total power loss is approximately 126 W, which the finned aluminum heatsink can dissipate via natural convection at up to 40C ambient temperature without exceeding semiconductor junction temperature limits. At 4 kW, power loss rises to roughly 173 W — a 37% increase that crosses the natural convection threshold for this enclosure size. The fanless 3 kW variant is therefore the highest-power G115D configuration that requires zero fan maintenance over its service life, making it a pragmatic choice for conveyor installations in overhead, mezzanine, or otherwise difficult-to-access locations where fan replacement would involve a service lift or production stoppage.

Which conveyor applications are best served by a fanless C2-filtered 3 kW drive?

Three application characteristics make this drive a strong fit: (1) noise-sensitive environments — airports, retail distribution centers, and occupied warehouse picking zones — where fan noise from dozens of drives accumulates to objectionable levels; (2) dusty or fiber-laden environments — textile handling, wood processing, and cardboard recycling conveyors — where airborne particulates can clog fan filters and reduce cooling efficiency; and (3) multi-drive daisy chains where C2 compliance must be maintained at every node without adding external filter modules. The 3 kW power rating covers the mid-range of conveyor loads: merge beds, accumulation zones, and medium-duty incline sections.

Frequently Asked Questions

Does fanless cooling limit the overload capability compared to the fan-cooled 4 kW variant?

No. The overload profile — 200% for 3 seconds and 150% for 57 seconds per 300-second cycle — is identical across all G115D variants regardless of cooling method. The fanless design limits continuous duty at elevated ambient (>40C), not short-term overload. At 50C ambient, the 3 kW fanless variant derates to approximately 80% of rated output current, while the 4 kW fan-cooled variant sustains higher output at the same elevated temperature.

Can the integrated C2 filter be disconnected if the drive is moved to an IT network?

Yes. The functional grounding link for the filter capacitors is removable — remove the grounding screw as documented in the G115D operating instructions. This disconnects the filter's Y-capacitors from earth, allowing safe operation on ungrounded (IT) supply networks without ground-fault nuisance tripping.