ZTED low-voltage delayed transition automatic and manual transfer switches are part of the GE Energy Digital Energy product line. They have high-speed, up to 115k Baud Modbus RTU serial communications, Fast Ethernet, (10/100 Mbit), Modbus TCP/IP Ethernet communications, True RMS metering, including THD% (up to 8th order), ability to transfer to de-energized normal source or center position in event of generator overload, integral surge protective device (SPD) load-connected medium or high exposure type, integral battery charger 3 or 10A, 12 or 24VDC type, compression lugs in lieu of standard mechanical lugs on 100A-1200A switches, mechanical or compression lugs in lieu of standard rear-bus connection on 1600-4000A switches, ratings voltage, ampere and pole configuration per Order Code, certifications UL 1008, CSA C22.2, third-party seismic certification to IBC 2006, 3.2g @ Ip = 1.5 (operation during event), momentarily energized, high-speed solenoid mechanism, mechanically-held with mechanical interlock to inhibit connection of both sources to the load, GE design and manufactured, silver tungsten alloy with separate arcing contacts on 600A and above ratings for high withstand and close-on capability, neutral pole (4 pole only), identical construction to phase poles with fully rated main and arcing contacts. Operation