SECTION 4.2
OPERATIONAL ANALYSIS
DC CONTROL
PART 4
Page 85
XB1, Wire B, and a bridge rectifier. The standby
closing coil energizes and the main current carrying
contacts of the transfer switch are actuated to their
'Standby" source side.
• As the main contacts move to their "Standby"
source side, a mechanical interlock actuates limit
switch XB1 to its open position and limit switch XA1
to its "Utility" side position. When XB1 opens,
standby closing coil C2 3 de-energizes.
• "Standby" power is delivered to the "Load"
terminals (T1/T2) of the transfer switch.
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