GE Fanuc F35A00VFHF8AH6GM8APXX Circuit Breaker

The GE Fanuc F35A00VFHF8AH6GM8APXX, also cataloged as the F35 Circuit Breaker, operates as a dedicated hardware component for electrical circuit protection within medium voltage networks. Configured with a nominal continuous physical rating of 4160 VAC and 800 A, the breaker executes immediate arc interruption up to 65000 A under fault conditions. The onboard microprocessor-based trip unit samples current parameters across three phases to drive internal trip coils when threshold parameters for overloads, ground faults, or phase imbalances are breached.

Hardware Specifications

Firmware Flash Compatibility and Microprocessor Trip Logic

The microprocessor-based trip unit regulates current-zero clearing coordinates by matching sensor acquisition times to internal firmware parameters. The processing core relies on strict firmware flash compatibility across memory tables to guarantee sub-cycle reaction thresholds for arc flash sensing and ground fault timing loops. By separating secondary monitoring communications from the execution registers of the direct-acting trip mechanism, the unit avoids backplane delays and processes heavy current step changes within fixed execution windows.

Frequently Asked Questions

Q: Can the microprocessor-based trip unit be flashed with newer firmware versions while the circuit breaker is energized with 4160 VAC?

A: No. Firmware modification or programming alterations must be performed with the breaker completely racked out and isolated from the primary voltage source. Updating firmware flash components on live systems introduces risk of unintended trip actuation or internal component damage.

Q: What dictates backplane current limitations when interfacing this device with external communication adapters?

A: The integrated trip logic draws power directly from internal current transformers or a separate secondary auxiliary line. It maintains isolation from external supervisory busses, ensuring that communication hardware faults do not interrupt the core phase balance protection loop.

Field Installation Guidelines

• Chassis Grounding Connection: Secure a heavy copper grounding bus strap directly from the designated frame ground terminal to the master station earth matrix before pulling primary lines.
• Secondary Signal Shielding: Route all external sensing lines and auxiliary alarm loops using shielded twisted-pair cables. Ground the shield at the enclosure cable gland entry plate to eliminate electromagnetic noise.
• Environmental Clearance: Ensure the panel or DIN rail layout conforms exactly to the NEMA rating limits specified, maintaining mandatory air gap clearances for 4160 VAC physical bus alignment.