Bryant ASPAS1BBA015 Manual de usuario descargar pdf (Pagina 53)

Page 53

SECTION 3.2

OPERATIONAL ANALYSIS

“V-TYPE” PREPACKAGED

TRANSFER SWITCHES

PART 3

TRANSFER TO STANDBY

The generator circuit board delivers 12 volts DC to the transfer relay, via terminal 194 and back to the circuit

board via terminal 23. However, circuit board action holds the Wire 23 circuit open and the transfer relay remains

de-energized. On generator startup, an "engine warm-up timer" on the generator circuit board starts timing. When

that timer has timed out, circuit board action completes the Wire 23 circuit to ground. The transfer relay then

energizes, its normally open contacts close, and standby source voltage is delivered to the standby closing coil

via Wires E1 and E2, the transfer relay (TR) contacts, limit switch (XB1), Wire "B". and a bridge rectifier. The

standby closing coil energizes and the main contacts actuate to their "Standby" side.

Figure 4. Transfer Action to Standby Position

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Bryant ASPAS1BBA015 Manual de usuario Pagina 53