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The diagram in Figure 2 shows a static bypass switch connected across a UPS. The UPS. could be a double conversion or a delta conversion or rotary type. The static bypass switch. provides a means to accomplish high-speed transfer to the bypass path in case of UPS.
Once the transfer switch is installed, the system works like this: When the electricity goes out, you set up a portable generator outside and plug it into the power inlet box. If the inlet-box cable runs to a junction box with power cord, plug the power cord into the transfer switch.