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Merlin Gerin STR58U-LSI-3000A - Trip Unit 3000A LSI (Masterpact)

Merlin Gerin
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Merlin Gerin STR58U-LSI-3000A is a solid-state trip unit designed for overload and short-circuit protection in Masterpact series circuit breakers. It operates at a voltage rating of 600V and supports a continuous current rating of 3000 amperes across three poles. The unit weighs 10 lb and is compatible with M and MP frame circuit breakers. It provides Long-Time, Short-Time, and Instantaneous (LSI) protection functions for precise coordination in electrical distribution systems. This trip unit is typically used in industrial power distribution and high-capacity switchgear applications.

Key Features & Specifications
  • Manufacturer: Merlin Gerin
  • Item Subcategory: Trip Units & Programmers
  • Family: Masterpact
  • Type: STR
  • Weight: 10 lb
  • Functions: LSI - Long-Time, Short-Time and Instantaneous
  • Voltage Rating: 600V
  • Poles: 3
  • Amperage Minimum: 3000
  • Protection: Solid State
  • Compatible Frames: M, MP
  • Amperage Maximum: 3000
  • Part Number: STR58U-LSI-3000A
  • Mounting: Compatible with Masterpact circuit breakers