Guardian Technologies 4390, 4456, 4389 Section, Operational Analysis, Part, Transfer To Standby

SECTION 3.2

OPERATIONAL ANALYSIS

PART 3

V-TYPE PREPACKAGED TRANSFER SWITCHES

TRANSFER TO STANDBY

When the standby coil is energized it pulls the transfer switch mechanism to a overcenter position towards the standby power source side, the transfer switch mechanically snaps to the STANDBY position. On closure of the main contacts to the standby power source side, limit switches XA1 and XB1 are mechanically actuated to "arm" the circuit for re- transfer to utility power source side.

Generator power from E1 and E2 is now connected to the customer load through T1 and T2.

Figure 5. Generator Powering Load.

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