... against overload, short-circuit, and high & low voltageCommunication portsRS 232 or SNMP card (optional)Unit size (mm)390*150*210474 ... against overload, short-circuit, and high & low voltageCommunication portsRS 232 or SNMP card (optional)Unit size (mm)480*240* ... against overload, short-circuit, and high & low voltageCommunication portsRS 232 or SNMP card (optional)Unit size (mm)555*265*665Shipping ...