The Thames series uninterruptible power supplies are true on-line
devices featuring double-conversion topology, with three-phase
input and single-phase output. They make use of Sinusoidal Pulse
Width Modulation (SPWM) and Insulated Gate Bipolar Transistors
(IGBT).
Static bypass, maintenance bypass, and microprocessor control
are standard on all models. SNMP and Web-based remote status
monitoring is optionally available for these units. Thames series
comes with maintenance-free dry type leadacid batteries of different
ratings and amounts to account for different autonomy times.