Eaton IZM63 Instruction Manual

33IZM63 / IN63 low voltage air circuit breaker MN013014EN May 2021 www.eaton.com.cnSection 5: Protective characteristic curvesIZM63 / IN63...V(P)...PXR20/25 Long Delay(L) and Short Delay(S) CurvesS-Protection with: I²t-Characteristic curve ON.01.02.03.04.05.06.07.08.09.1.2.3.4.5.6.7.8.91234567891020304050607080901001234567891020304050607080901002003004005006007008009001000200030004000500060007000800090001000012245415270.531.51060.50.10.30.4130.54Time in SecondsCurrent in Multiples of Long Delay Pickup (Ir )Notes:1. This curve shown as a multiple of the LONG PU setting(Ir). The actual pickup point occurs at 110% of the Ir, with ±5% tolerance.2. SDPU = 1.5x to 10x of Ir, have 100% ± 10% tolerance.3. LD Time = 0.5s to 24s, have 100% +0 / -30% tolerance.4. SD Slope = I²T. The short pickup points have ±10% tolerance.time setting from 0.1s to 0.5s, with steps of 0.1s, except 0.2s.tolerance is 100% +0 / -30% except 0. 1s, has tolerance 100% +0 / -40%.5. I²T slopes flattens out at 8x of Ir for top of band with FLAT time minimum value prevailing for bottom of band. For all curves the lower flatresponse time value projected to I²T line will determine the other break point and shape of the curve.6. If long delay thermal memory is enabled, trip times may be shorter than indicated in this chart.7. Curves applies from -20°C to +70°C ambient. Temperatures above +85°C will cause over temperature trip.8. This curve is for 50Hz, 60Hz applications.9. These curves are comprehensive for series IZM63 circuit breakers including all frame sizes, ratings, and constructions.