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Schneider Electric 33072 - Trip Unit LSI 600V (Micrologic 5.0A)

Merlin Gerin
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Schneider Electric Micrologic 33072 is a solid-state trip unit designed for advanced LSI (Long-Time, Short-Time, and Instantaneous) protection in industrial power distribution systems. It operates at a voltage rating of 600V and is compatible with Masterpact NS, NT, NW, and other frame series including PG, PJ, PK, PL, RG, RJ, RK, and RL. The unit weighs 1 lb and features a digital display with LED signaling for fault indication, supporting both fixed and drawout mounting configurations for 3-pole and 4-pole arrangements. It complies with industry standards for electronic protection and measurement in AC networks at 50/60 Hz. Typical applications include selective coordination and protection in commercial and industrial electrical systems.

Key Features & Specifications
  • Manufacturer: Schneider Electric
  • Item Subcategory: Trip Units & Programmers
  • Family: Micrologic
  • Type: 330
  • Weight: 1 lb
  • Functions: LSI - Long-Time, Short-Time and Instantaneous
  • Voltage Rating: 600V
  • Protection: Solid State
  • Compatible Frames: NS, NT, NW, PG, PJ, PK, PL, RG, RJ, RK, RL
  • Part Number: 33072
  • Series: Masterpact NT/NW
  • Control Unit Type: Micrologic 5.0A
  • Number of Poles: 3P, 4P
  • Mounting Type: Fixed, Drawout
  • Network Type: AC
  • Network Frequency: 50/60 Hz
  • Long-time Pickup Adjustment: 0.4–1 x In
  • Short-time Delay Adjustment: 0–0.4 s
  • Instantaneous Pickup Adjustment: 2–15 x In