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Merlin Gerin STR58U-LSIG-1200A - Trip Unit 1200A 600V

Merlin Gerin
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Merlin Gerin STR58U-LSIG-1200A is a solid-state trip unit designed for the Masterpact family of circuit breakers, providing LSIG protection functions including long-time, short-time, instantaneous, and ground fault. It is rated for 1200 amperes at 600 volts AC across 3 poles, ensuring reliable and selective trip performance for power distribution systems. The unit weighs 10 lb and is compatible with M and MP frame draw-out electrically operated circuit breakers. This trip unit complies with industry standards for high interrupt capacity applications in industrial environments. Typical applications include main and feeder protection in commercial and industrial power distribution panels.

Key Features & Specifications
  • Manufacturer: Merlin Gerin
  • Item Subcategory: Trip Units & Programmers
  • Family: Masterpact
  • Type: STR
  • Weight: 10 lb
  • Functions: LSIG - Long-Time, Short-Time, Instantaneous and Ground Fault
  • Voltage Rating: 600V AC
  • Poles: 3
  • Amperage: 1200A
  • Protection: Solid State
  • Compatible Frames: M, MP
  • Mounting Type: Draw-out, Electrically Operated
  • Series/Frame: Masterpact MP12H1