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Merlin Gerin STR38S-LSI-800A - Trip Unit 800A 600V

Merlin Gerin
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Merlin Gerin STR38S-LSI-800A is a Masterpact electronic trip unit designed for advanced overcurrent protection in air circuit breaker systems. It operates at a voltage rating of 600V AC and supports a current range from 800A minimum to 800A maximum, with LSI (Long-Time, Short-Time, and Instantaneous) protection functions using solid-state RMS sensing technology. The unit weighs 10 lb and is compatible with M and MP frame types, featuring a 3-pole configuration. It complies with industry standards for industrial power distribution, incorporating thermal memory and I2t ramp characteristics for precise fault coordination. This trip unit is typically applied in industrial and commercial power distribution environments requiring reliable overcurrent protection and monitoring.

Key Features & Specifications
  • Manufacturer: Merlin Gerin
  • Family: Masterpact
  • Type: STR
  • Functions: LSI - Long-Time, Short-Time and Instantaneous
  • Voltage Rating: 600V AC
  • Poles: 3
  • Amperage Minimum: 800A
  • Amperage Maximum: 800A
  • Protection: Solid State
  • Compatible Frames: M, MP
  • Weight: 10 lb
  • Current Sensor Rating: 800A
  • Sensing Technology: RMS (Root Mean Square)
  • Standard Features: Alarm switch, Overcurrent trip switch, Thermal memory, I2t ramp