Electric MCB Accessories Function OF Auxiliary Contact: Indicate the status of making or breaking of MCBs. MX Shunt Trip: MCB and RCBO by remote controlling device. SD Alarming Contact: Indicate the status of making or breaking of MCBs. MN Under or Over Voltage Trip: Make the MCBs trip when voltage is over or under the rated voltageTechnical Parameter Model typeEBS6B-OF, EBS6B-MX, EBS6B-SD, EBS6B-MNStandardIEC62019Rated current3, 6, 9ARated frequency50/60HzEndurance4000 timesRated voltage AC(V)125, 300, 400MCB AccessoriesEBS6B-MXMX Shunt TripMCB AccessoriesEBS6B-SDSD Alarming ContactFeatures●Mounted on the left side of EBS6B MCBs and RCBOsApplicable Working and bus bar connection Ambient temperature-5~+40℃, the average value cannot exceed to +35℃ within 24hAltitude≤2000 mRelative humidity≤95%Pollution levelII.Installation locationPlace free from erosion of rain and snow