LDL36400U43X Schneider Electric Industrial Automation Components

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Square D by Schneider Electric LDL36400U43X is a Moulded Case Circuit Breaker (MCCB) within the PowerPacT LDL sub-range, featuring a PowerPact L-Frame 600 Micrologic 5.3A (LSI) design. It is a 3-pole (3P) device with a rated current of 400A and offers a connection type with lugs on both load and line sides. This MCCB provides protection functions including Long-time (L), Short-time with fixed time delay (S), Instantaneous (I), and Zone Selective Interlocking (ZSI). It has a rated insulation voltage (Ui) of 750V, a rated voltage (AC) of 600Vac, and a rated voltage (DC) of 250Vdc. The unit is designed for individual mount on plate, with a net height of 382 mm, width of 153 mm, and depth of 171 mm. It features a degree of protection of IP40 and operates via a toggle (manual) mechanism. Protection settings are adjustable, with L protection against overload (0.3...1 x In), S protection against short-circuit with time delay (1.5...10 x lr), and I for instantaneous protection against short-circuit (1.5...12 x In). The rated operating voltage (Ue) is 690V, with a rated impulse voltage (Uimp) of 8kV. The trip current rating is 400 AT, and the frame current rating is 600 AF. Its short circuit breaking rating includes 25kA at 240Vac, 18kA at 480Vac, and 14kA at 600Vac, all per UL489 standards. The trip unit type is an electronic Micrologic 5.3A (LSI) with an LCD display, offering current measurements and calculation functions for phases and neutral, including RMS instantaneous current, average current, current unbalance, highest RMS current, ground fault current, and demand/peak current values with an adjustable calculation window of 5-60min. The utilisation category is A.