Description

ABB SPAD346C3 Power Control Drive Card Integrated Protection Relay

SPAD346C3

The ABB SPAD346C3 is a high-performance numerical protective relay engineered for reliable protection and control of medium-voltage power system components, belonging to ABB’s renowned SPAD series—trusted in industrial and utility applications for decades. As a versatile protective relay, its core function is to detect electrical faults (such as overcurrent, earth faults, or overloads) in power distribution networks, transformers, motors, or feeders, and initiate timely tripping to prevent equipment damage and ensure system stability.

SPAD346C3

The ABB SPAD346C3 stands out for its adaptive protection algorithms, which automatically adjust to varying system conditions—critical in dynamic environments like solar farms, where load fluctuations are frequent. For example, its thermal overload protection uses a dynamic model to mimic equipment heating/cooling curves, preventing unnecessary tripping during temporary overloads while ensuring long-term equipment safety.

• ABB SPAD346C2 – Previous-generation model with limited communication protocols (no IEC 61850), replaced by the SPAD346C3 for smart grid compatibility.
• ABB SPAD346C4 – Enhanced variant with additional protection functions (e.g., distance protection) for long feeder applications.
• ABB SPAD300 – Compact base model of the series, optimized for simple overcurrent protection in low-complexity systems.
• ABB REL650 – Advanced feeder protection relay that complements the SPAD346C3 in high-voltage grids, offering extended fault location capabilities.
• ABB SPAC320 – Auxiliary control relay designed to work with the SPAD346C3, handling auxiliary functions like alarm signaling or breaker control.
• ABB SPAD346C1 – Legacy model with electromechanical backup features, retained for retrofits in systems requiring hybrid protection.