3SE

ELECTRICAL SIGNALLING, MEASURING, COUNTING, RECORDING, MONITORING, TESTING, OPEN AND CLOSED-LOOP CONTROL AND SWITCHING DEVICES, NAMELY, LOW-VOLTAGE ELECTRIC SWITCHES, CONTRACTORS, OVERLOADED SWITCHES, RELAYS, ELECTRIC SWITCHES WITH ACTUATOR-SENSOR INTERFACES TO CENTRAL CONTROL UNITS; SAFETY SWITCHES, NAMELY, MECHANICAL POSITION INDICATING SWITCHES; DATA PROCESSING COMPUTER SOFTWARE FOR OPERATING ELECTRIC SWITCHES