3VT8440-1AA03-0AA2 Circuit Breaker Inquiry Item

Product Description

3VT8440-1AA03-0AA2 belongs to Siemens SIRIUS 3VT8 series molded case circuit breaker. It is a 3-pole fixed type breaker with thermal magnetic trip unit, rated current 400A. It provides overload and short-circuit protection for distribution lines, motors and power cabinets. It features compact structure, stable breaking performance, widely used in industrial workshop, water treatment and petrochemical low-voltage distribution systems.

Technical Specifications

Model: 3VT8440-1AA03-0AA2 Brand: Siemens Series: 3VT8 VT400 Pole: 3-pole Rated current: 400 A Rated voltage: 690 V AC Breaking capacity Icu: 35 kA @ 415 V Trip unit: Thermal magnetic Mounting: Fixed mounting Certification: CE, IEC Protection grade: IP40 (front)

Components & Troubleshooting

It consists of main contact assembly, arc extinguishing chamber, thermal magnetic trip unit, operating handle, plastic housing and wiring terminals. Common faults: Cannot close manually, trip without overload, contact overheating, contact welding after short circuit, trip unit failure.

Disclaimer

This spare part shall be installed, calibrated and maintained by qualified instrument technicians. Verify rated current and trip parameters before commissioning.