Schneider Electric C2545E250 MicroLogic 5.2 E Trip unit for NSX 250 rating 250A 4P

The Schneider Electric C2545E250 is a MicroLogic 5.2 E electronic trip unit for ComPacT NSX250 new-generation circuit breakers, providing LSI protection with integrated energy measurement for power distribution applications.

• Trip unit name: MicroLogic 5.2 E
• Compatible breaker: ComPacT NSX250 (new generation)
• Rating: 250 A at 40 °C
• Poles: 4P (protected poles: 3d + N/2, 4d, 3D + OSN, or 3d; neutral conductor position: left)
• Rated voltage [Ue]: 690 V AC, 50/60 Hz
• Protection function: LSI — long-time overload (L), short-time short-circuit (S), instantaneous short-circuit (I)
• Long-time pick-up [Ir]: 100–250 A, 9 adjustable settings; delay 15–400 s at 1.5 × Ir, 0.5–16 s at 6 × Ir, 0.35–11 s at 7.2 × Ir
• Short-time pick-up [Isd]: 1.5–10 × Ir, 9 adjustable settings; delay 0–0.4 s (I²t off) or 0.1–0.4 s (I²t on)
• Instantaneous pick-up [Ii]: 1.5–12 × In, adjustable or Off
• Thermal memory: 20 minutes before and after tripping
• Zone selective interlocking (ZSI): included
• Display: LCD with multimeter measurement; data includes energy measurement, power quality, demand values, max/min records, and time-stamped event history
• Local signalling: flashing green LED (device ready), orange LED (overload at 90% Ir), red LED (overload at 105% Ir)
• Standards: EN/IEC 60947-2; IP40 per IEC 60529; operating temperature −25 to 70 °C; storage temperature −40 to 85 °C