Technical Specifications Compatible Breaker Frame: Matched for GE large‑frame molded case circuit breaker Protection Function: Long‑time overload, short‑time delay, instantaneous short‑circuit, ground‑fault protection Current Setting Range: Programmable adjustable protection threshold Communication Interface: Local test port Trip Output Mode: Mechanical linkage drive for breaker trip mechanism Operating Power Supply: Self‑powered from breaker current transformer Operating Temperature: ‑40℃ ~ +70℃ Storage Temperature: ‑50℃ ~ +85℃ Relative Humidity: 5%‑95%, non‑condensing Certifications: UL, CE solid‑state trip unit compliance
Functional Features Fully adjustable protection setting parameters without mechanical component replacement. Built‑in fault‑event storage for fault‑current value recording after protection action. Local test interface for protection function verification on‑site. Self‑powered design, no external auxiliary power supply required. 
Application Scenarios Upgrade retrofit for GE legacy large‑frame molded case circuit breakers. Industrial low‑voltage main incoming feeder multi‑function protection. Heavy‑industry factory power distribution loop precise protection requirement. Power plant auxiliary power cabinet circuit protection upgrade.
Structural Characteristics Compact plug‑in module housing, installable inside corresponding breaker frame cavity. Front‑panel setting dial / local test operation interface. Internal precision current‑sampling transformer and solid‑state logic circuit board. Mechanical trip actuator for driving breaker mechanical trip linkage. Metal shielding shell reduces electromagnetic interference influence inside breaker cabinet. Position‑locking buckle for firm fixing inside breaker body.
Working Principle Current signal from breaker built‑in CT is sampled and sent to solid‑state logic circuit. Microprocessor compares sampling value with each group of preset protection threshold parameters. Self‑diagnosis circuit monitors CT sampling and internal circuit operating state continuously.
Installation RequirementsLock the trip unit in position with built‑in buckle, guarantee mechanical trip linkage is in good engagement. Verify CT signal wiring connection is correct and reliable. Carry out protection function test via local test port after installation completion. Ambient temperature and humidity inside breaker cabinet shall keep within specified range, avoid condensation.
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