mcb auxiliary switch: auxiliary contact, alarm contact, shunt release,mx + of, under voltage release,over voltage. HH45/60/61 Circuit ... breaker univeral auxiliary switch / univeral accessory, mx + of Scope of Application OF and SD are suitable for ... .Can be used for uniting the warning contact,Standard:IEC40947 MX SHUNT RELEASE is suitable for telecontrol release,can install on ...