ABB REF543KM127AAAA Feeder Terminal

ABB REF543KM127AAAA is a highly integrated feeder protection and control terminal belonging to ABB’s REF 54x series, specifically designed for medium-voltage substations 

and industrial power distribution systems. It is engineered to provide a safe and reliable connection between feeder cables and protection control equipment, made of high-quality materials 

to withstand the rigors of harsh industrial environments. The terminal integrates comprehensive protection functions including overcurrent, earth fault, phase unbalance, and thermal overload, 

as well as advanced control functions such as circuit breaker control, auto-reclose, and interlocking, along with a built-in fault locator for short circuits in various network types. It supports 

accurate measurement of key electrical parameters including voltage, current, power, energy, and frequency, via conventional measuring transformers or current sensors and voltage dividers, 

with 25 digital inputs and 18 relay outputs for flexible I/O configuration to meet diverse on-site needs. Equipped with multiple communication protocols such as SPA bus, LON bus, 

IEC 60870-5-103, and Modbus, it can also support IEC 61850 (via SPA-ZC 400 adapter) and Profibus DPV1 (via SPA-ZC 302 adapter) for seamless integration with SCADA systems 

and upper-level automation equipment. The built-in PLC logic function allows customized programming, minimizing the need for external hardwiring and enhancing system flexibility, 

especially when combined with LON communication to reduce wiring between feeder terminals. With an operating temperature range of -25°C to +55°C and IP65 protection rating, it 

ensures stable and reliable performance in harsh industrial environments. Originating from Finland, this terminal has a gross weight of 7.7kg and is available in new original units with 

global stock availability. We supply new, original, and refurbished ABB REF543KM127AAAA terminals, all fully tested with warranty and fast global delivery to meet your substation 

automation and feeder control needs.