Square D PFA34030GN bus plug-in unit for I-Line busway provides a 30‑A, 277/480 VAC, four‑wire interface to insert an FA‑frame circuit breaker into a Square D I‑Line busway system. This plug‑in unit is designed for FA‑frame breakers and presents a 3‑pole, 4‑wire configuration compatible with 277/480 VAC service, enabling modular protection in three‑phase distributions. It mates with Square D busway sections to form a safe, quick‑connect breaker plug‑in path within FA‑frame I‑Line busway infrastructure.
