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ABB REF541KM118AAAA REF54 Series Multifunctional MV Feeder Protection & Bay Control Terminal

Made by ABB Switzerland factory, REF541KM118AAAA belongs to discontinued classic REF54 product line, industrial-grade all-in-one feeder terminal adopting mature DSP digital core, full EMC anti-interference design adapting harsh EMI environment inside distribution switch room。

Complete standard protection suite compliant IEC/ANSI specifications: directional/non-directional overcurrent IDMT/definite time, residual earth fault, negative sequence, thermal overload, over/under voltage, auto-reclosing, breaker failure backup protection; expandable for capacitor group & medium voltage three-phase motor dedicated protection functions。

Front detachable large graphic LCD supports single-line mimic diagram display, local manual switch operation & parameter checking; rear screw terminal layout with fixed I/O configuration per KM118AAAA coding, 15 digital input +12 relay output onboard, no extra expandable IO slot for this variant。

Triple communication channel design: one front local RS232 for PC commissioning, rear native SPA bus + LON bus as standard; supports SPA, LON, IEC60870-5-103, Modbus RTU, DNP3.0; IEC61850 & Profibus-DP need external SPA-ZC adapter expansion to realize Ethernet digital substation access。

Embedded free programmable PLC logic cuts external intermediate relay wiring, realizes interlock & sequential control; built-in disturbance recorder + multi-threshold event logger stores fault waveform & historical alarm for post-fault analysis, also supports THD harmonic measurement & voltage sag/swell power quality monitoring。

1.Utility Power Grid:6~33kV urban/rural substation incoming/outgoing feeder protection, old RMU equipment renovation spare replacement

2.Thermal/Hydro Power Plant:station service auxiliary feeder, plant medium voltage motor & capacitor cabinet protection

3.Metallurgy & Petrochemical:factory workshop MV distribution outgoing line, large motor & reactive compensation cabinet control protection

4.Old Substation Retrofit:legacy ABB SPA/LON bus automation system damaged unit direct pin-to-pin replacement

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple as possible, we offer multiple payment methods including bank transfer, check, and PayPal. Meanwhile, we also accept most mainstream credit and debit cards, such as Visa, Mastercard, and American Express. We can accept payments in most major currencies worldwide, but we recommend using US dollars (USD), British pounds (GBP), or euros (EUR) as a priority. Payments in other currencies may incur additional fees. All transactions are securely processed by HSBC Bank and HSBC Merchant Services.

How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.