ABB Sace Megamax F4S Circuit Breaker 3200A

ABB Sace Megamax F4S 3200A Air Circuit Breaker (690V)

The ABB Sace Megamax F4S 3200A is a heavy duty, high performance Air Circuit Breaker (ACB) designed for the high electrical requirements of large scale industrial infrastructures and marine main switchboards. This legacy breaker is rated for 690V AC and continuous current rated for 3200A and is a famous “S-Class” (Standard/High selected breaking performance) breaker that provides premium thermal and short-circuit protection. The SACE PR1/P (LSIG parameters) modern electronic trip devices ensure complete accuracy in selective coordination, safeguarding heavy machinery, alternators and main distribution lines from catastrophic faults.

Model Details:

• Model Range: SACE Megamax F Series (Frame 4)
• Specific Model: ABB Sace Megamax F4S 3200
• Manufacturer Part Number (MPN): F4S3200

Specifications: F4S3200

Applications

• Marine Main Switchboards Main generator or bus-tie breaker for commercial boats, container ships and offshore drilling platforms.
• Industrial Power Distribution Used in large manufacturing industries, steel mills, automotive factories to protect key low voltage substations.
• Critical Infrastructure & Data Centers Robust incoming power protection for high capacity step-down transformers.
• Power Plants & Utilities: Executed as a point of execution for generator protection and grid synchronization panels.

Compatibility

• System Integration: Compatible with classic low-voltage ABB Sace power distribution switchgear panels from the 1990s through mid-2000s legacy eras.

Part Number Cross-References

• Cross-References / Direct Replacement Path: * Direct legacy equivalents: Megamax F4S 3200 PR111, PR112, or PR113 series.

Maintenance Guide by NDMarineTech:

1. PR1/P Battery Lifespan: The internal microprocessor trip units rely on auxiliary power during operation, but internal memory can suffer if stored dead. Always test the electronic trip unit with a secondary injection test kit before racking a long-stored surplus unit back into service.
2. Contact Resistance Checks: Before installation, check the micro-ohm drop across the main contacts. For a 3200A breaker, any high resistance reading indicates contact pitting or weak spring pressure, which will cause thermal runaway at full load.
3. Arc Chute Inspection: Never put a surplus or reconditioned breaker into service without removing the arc chutes to visually inspect the main and arcing contacts for erosion.