Technical Specifications Device Type: Molded Case Circuit Breaker Trip Unit Rated Current: 100A Frame Size: THED series frame Rated Operating Voltage: 600V AC Pole Configuration: 3‑pole Operating Temperature: ‑20 °C to +60 °C Storage Temperature: ‑40 °C to +85 °C Relative Humidity: 5%‑95%, non‑condensing Certifications: UL, CE low‑voltage distribution equipment compliance
Functional Features Provides long‑time delay overload protection and instantaneous short‑circuit protection function. Real‑time monitoring of loop current value during equipment operation. Mechanically triggers breaker opening action when fault current exceeds preset threshold. Designed as plug‑in replaceable unit for convenient on‑site maintenance and replacement. Anti‑aging mechanical structure adapts to industrial cabinet vibration environment.
Application Scenarios Applied in factory low‑voltage power distribution cabinets, commercial building power distribution systems, auxiliary power supply loops of petrochemical and metallurgical sites. It offers circuit fault protection for motor feeders, power supply branch circuits and transformer secondary distribution loops.
Structural Characteristics Compact modular mechanical‑electronic integrated structure. Standard plug‑in interface for matching THED series circuit breaker main body. Internal contains current sensing components and mechanical trip driving mechanism. High‑strength heat‑resistant engineering plastic shell for internal component isolation.
Working Principle Current sensing components detect real‑time current of power loop. When overload or short‑circuit fault occurs, sensed current value exceeds protection setting threshold. Internal mechanism outputs mechanical driving force to push breaker operating mechanism, cut off power supply loop rapidly to avoid equipment damage.
Installation Requirements Install THED136100WL trip unit into matched THED series molded‑case circuit breaker housing. Complete mechanical locking to ensure reliable contact between trip unit and breaker main mechanism. Install the complete circuit breaker unit on standard DIN‑rail inside power distribution cabinet. Check mechanical trip function test before putting the whole device into service.
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