SMARTZONE UPS USER MANUAL
5
Basic Operations
The basic operations of a double conversion UPS are explained through the high-level
generic block diagram in Figure 1. The generic diagram is only used for simple high-
level explanation of the UPS working modes and operating states. This block diagram is
not the actual block diagram of the UPS units.
UPS Overview
The input of the UPS is connected to an AC power source via an input plug or hardwire
connections. The output is connected to loads via outlets or hardwire connections on
the UPS. The load may be powered from the input source or the battery. The UPS
power switching circuitry may be isolated from the power chain while continuing to
power the load (ECO Mode or bypass state). The following UPS Mode and UPS State
sections use the simplified block diagram to help explain the modes and states of the
UPS.
Figure 1: High-level Generic Double Conversion UPS Block Diagram
UPS Working Modes
The UPS may be configured into four different working modes. This section provides an
explanation of these settable working modes. One of the four working modes are
