Generac Power Systems PowerPact 6561 Installation Notes page 35

Probably requires 300-600V rated wire. Thermostat wire will not meet code. N1, N2, & T12 are 120V. Must meet local
code.
Also available two sizes of Generac Power /Control Cable.
Power wires & Control wires in one cable.
6-17kW has #6-3, #8-1, #18-6 conductors.
20-22kW has #3-3, #6-1, #18-6 conductors.
Transfer Operation

Generac (RTS switch) Transfer Relays are controlled by the controller in the Generator set.

The transfer relay gets 12VDC from the Generator battery via wire 15B or 194 from the generator
control board.

The 12VDC circuit is completed through the transfer relay coil and back to the controller via wire 23.

The controller holds wire 23 circuit open to ground (normally open) and the relay is de-energized.
 When de-energized, the relay contacts are in their normal condition (one set open and one set closed).
The normally closed relay contacts deliver utility source power to the utility closing circuit of the transfer
switch.
 The normally open relay contacts will deliver standby source power to the transfer switch standby
closing circuit only when the transfer relay is energized by the control panel in the generator.
 During automatic system operation, when the generator controller senses that the utility source voltage
has dropped out (via wires N1 and N2), the controller will initiate a ten-second Line Interrupt Delay
Timer. At the end of the ten-second delay, the controller will crank and start the engine.
The Transfer Relay energizes:
 The relays normally closed contacts open and the normally open contacts close.
 When the normally open contacts close, standby source power is delivered to the standby closing coil
and transfer to standby occurs (you hear the transfer coil engage...it's loud).
Transfer back to Utility
 When the controller senses that utility source voltage has been restored (via wires N1 and N2) for 15
seconds, the wire 23 circuit will open to ground.
 The Transfer Relay will de-energize, its normally open contacts will open.
 When the normally closed relay contacts close, utility source voltage is delivered to the utility closing
coil to energize the coil. Transfer back to utility occurs.
Generac Control Cable is 18AWG 7 conductor TFFN 600V
90degC dry, 75degC wet, UL Listed Type
TC-ER UL1277
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