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Schneider Electric STR28D - Trip Unit 600V 3-Pole (800-6300A)

Merlin Gerin
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Schneider Electric STR28D is a 3-pole electronic trip unit for Masterpact circuit breakers, providing solid-state protection with LI (Long-Time and Instantaneous) functions. It operates at 600V AC and supports an adjustable amperage range from 800 to 6300 A, depending on the sensor. Weighing 10 lb, this unit is designed for direct mounting on Masterpact M and MP frames and includes a mechanical fault trip indicator with reset, an LCD ammeter for phase current monitoring, and local and remote pre-trip alarms. It complies with industry standards for industrial and commercial power distribution systems requiring customizable circuit protection. Typical applications include main and feeder protection in switchboards and distribution panels.

Key Features & Specifications
  • Manufacturer: Schneider Electric
  • Item Subcategory: Trip Units & Programmers
  • Family: Masterpact
  • Type: STR
  • Weight: 10 lb
  • Functions: LI - Long-Time and Instantaneous
  • Voltage Rating: 600 VAC
  • Poles: 3
  • Amperage Minimum: 800 A
  • Amperage Maximum: 6300 A
  • Protection: Solid State
  • Compatible Frames: M, MP
  • Mounting Type: Compatible with Masterpact M and MP frames
  • Trip Unit Type: Electronic adjustable long-time, short-time, instantaneous
  • Features: Mechanical fault trip indicator with reset, LCD ammeter display, local and remote pre-trip alarms
  • Application: Industrial and commercial power distribution