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Merlin Gerin STR58U-LSIG-800A - Trip Unit 800A 600V 3-Pole

Merlin Gerin
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Merlin Gerin STR58U-LSIG-800A is a solid-state trip unit designed for LSIG protection (Long-Time, Short-Time, Instantaneous, and Ground Fault) in Masterpact series circuit breakers. This 3-pole unit is rated for 800A at 600V, providing adjustable trip settings and zone-selective interlocking for coordinated protection. Weighing 10 lb, it features a plug-in mounting type and is compatible with Masterpact M and MP frames. The trip unit complies with UL 489 standards for reliable performance in power distribution networks. It is typically applied in industrial circuits requiring advanced solid-state protection.

Key Features & Specifications
  • Manufacturer: Merlin Gerin
  • Series: Masterpact
  • Type: STR58U
  • Amperage: 800A
  • Voltage: 600V
  • Poles: 3
  • Protection: LSIG (Long-time, Short-time, Instantaneous, Ground-fault)
  • Mounting Type: Plug-in
  • Interrupt Rating: Up to 100 kA
  • Control Unit Features: Built-in ammeter, zone-selective interlocking
  • Standards: UL 489
  • Application: Power distribution, industrial circuits
  • Weight: 10 lb
  • Compatible Frames: M, MP