Product Manual A

4 Operation

4.1 Transfer Switch Configuration

The transfer switch is preset at the factory to operate using default settings. The control will operate the

transfer switch when power is applied. However, you may wish to adjust some of the settings for your

application.

The transfer switch must be installed correctly, with DC power present, before any adjustments to the

configuration can be made. If the transfer switch is connected to utility power, the Utility Power Connected

LED will be lit if battery power is available. Utility or genset voltage need not be present to adjust the

configuration.

The following tables show which control functions should not be changed and which functions can be

changed for your application.

TABLE 1. FUNCTIONS PRESET AT THE FACTORY THAT SHOULD NOT BE CHANGED

Function Factory Setting

System Nominal Voltage Table Set for your system voltage

System Nominal Voltage Set for your system voltage

System Nominal Frequency Set for your system frequency

System Phase Set for your system

External Exercise Set to “On" if the external exerciser option was ordered; otherwise, set to

“Off"

TABLE 2. FUNCTIONS THAT CAN BE CHANGED

Function Factory Setting

TDES (Time Delay Engine Start) 3 Seconds

TDNE (Time Delay Normal to Emergency) 5 Seconds

TDEN (Time Delay Emergency to Normal) 10 Minutes

TDEC (Time Delay Engine Cool-down) 10 Minutes

TDPT (Time Delay Programmed Transition) 0 Seconds

TDEL (Time Delay Elevator Signal) 0 Seconds

Test With or Without Load Without Load

Exercise With or Without Load Without Load

Utility Under-voltage Pickup 90%

Utility Under-voltage Dropout 85%

Phase Check Off

Return to Programmed Transition Off

Elevator Post Transfer Delay Off