The MX100 microprocessor-based controller is designed to control a GE Zenith Controls automatic transfer switch (ATS). It has the capability to control either a standard transition ATS or a delayed transition ATS. The MX100 continuously monitors source voltage, and begins monitoring generator voltage and frequency in the event that normal voltage falls below a preset drop-out value. When generator voltage is acceptable, the transfer to emergency sequence is completed. A built-in, seven-day exerciser timer is standard in every MX100, and the unit may be used with five control input options. It also may be equipped with an optional network card that allows digital communication of ATS position, source availability, control timers and test mode. Electrical Ratings Ratings 40 to 3000 amps (2, 3 or 4 poles) UL1008 listed at 480 VAC CSA certified at 600 VAC UL, CSA and IEC listed Ringing wave immunity per IEEE 472 (ANSI C37.90A) Conducted and radiated emissions per EN550222 Class B (CISPR 11) ESD immunity test per EN61000-4-2 (level 4) Radiated RF, electromagnetic field immunity test per EN61000-4-3 (ENV50140) 10 v/m Electrical fast transient/burst immunity test per EN61000-4-4 Surge immunity test per EN61000-4-5 IEEE C62.41 (1.2 X 50 µs, 5 and 8 kV) Conducted immunity test per EN61000-4-6 (ENV50141) Voltage dips and interruption immunity per EN61000-4-11 Performance Features LEDs for continuous monitoring of switch position, source availability, exercise time delay operation and diagnostics Simplified adjustment for voltage, frequency and time delay settings Close differential three-phase under-voltage sensing of the normal source, factory standard setting 90% pickup, 80% dropout (adjustable); under-frequency sensing of the normal source, factory setting 95% pickup (adjustable) Voltage and frequency sensing of the emergency source, factory standard setting 90% pickup voltage, 95% pickup frequency (adjustable) Test switch (fast test/load/no load) to simulate normal source failure?2014automatically bypassed should emergency source fail Design and Construction Features Close differential three-phase under-voltage sensing of the normal source?2014factory standard setting 90% pickup, 80% dropout (adjustable); under-frequency sensing of the normal source?2014factory setting 95% pickup (adjustable) Voltage and frequency sensing of the emergency source?2014factory standard setting 90% pickup voltage, 95% pickup frequency (adjustable) Test switch (fast test/load/no load) to simulate normal source failure?2014automatically bypassed should the emergency source fail Type 1 enclosure is standard; also available in open style or Types 3R, 4 or 12 Double-throw, mechanically interlocked contactor mechanism Electrically operated, mechanically held Designed for emergency and standby applications