Main Contacts At Neutral; Main Contacts At Standby (Emergency); Switches And Advisory Lamps; Mode Switch - Generac Power Systems GTS "W" Owner's Manual

3.7

MAIN CONTACTS AT NEUTRAL

LOAD terminals are disconnected from both power sup-
ply terminals. The word "OFF" will be displayed in both
Windows "A" and "B" (Figure 3.4).
Figure 3.4 — Main Contacts at Neutral
3.8 MAIN CONTACTS AT STANDBY
(EMERGENCY)
LOAD terminals are connected to the standby (emer-
gency) power supply. Window "B" will display the word
"ON"; Window "A" the word "OFF" (Figure 3.5 on page
10.
Figure 3.5 — Main Contacts at Standby
(Emergency)
3.9

SWITCHES AND ADVISORY LAMPS

This section will familiarize the reader with switches
and advisory lights on the transfer switch enclosure
door, as well as with the Safety Disconnect Switch
inside the switch enclosure.
Circuit board inside the switch door may also mount
several switches. Operation of these switches will be
covered in the section entitled SENSOR AND TIMER
ADJUSTMENTS.
10 Generac ® Power Systems, Inc.
Section 3 — Operation
Generac GTS "W" Type Transfer Switch

3.10 MODE SWITCH

This switch permits operator selection of AUTOMATIC,
NORMAL TEST or FAST TEST mode as follows (Figure
3.6):
3.10.1 AUTOMATIC MODE
Use this switch position for all normal automatic oper-
ations. With AUTOMATIC MODE selected, any NORMAL
source voltage that dropped below a pre-set value will
result in the automatic sequence of events listed in the
chart in Section 3.14.
3.10.2 NORMAL TEST MODE
Permits the operator to test automatic operations, just as
though an actual drop in NORMAL source voltage had
occurred. See the chart in Section 3.14. During the test,
observe the lights (LED's) on the transfer switch circuit
board to monitor automatic operating sequences.
3.10.3 FAST TEST MODE
Permits the operator to test system operation with all
circuit board timers accelerated to less than five sec-
onds. Switch is spring-loaded back to AUTOMATIC
MODE, so continuously press the FAST TEST CON-
TROL. Following the generator startup, loads are trans-
ferred to the EMERGENCY (standby) power source as
soon as EMERGENCY source voltage and frequency
have reached the settings of STANDBY VOLTAGE and
STANDBY FREQUENCY sensors on the SYSTEM CON-
TROL board.
Figure 3.6 — System Test Switch, Standby
Operating LED, and Switch Position LED
GENERAC
AUTOMATIC MODE
UTILITY
FAST TEST MODE

3.11 STANDBY-OPERATING LED

This LED will go ON to tell the operator that the stand-
by generator is running and that STANDBY (emergency)
source power is available to the transfer switch.
STANDBY
EMERGENCY OPERATING
R R