Adjustments On Inphase Monitor Control Circuit Board - Generac Power Systems GTS "W" Owner's Manual

3.17 ADJUSTMENTS ON INPHASE
MONITOR CONTROL CIRCUIT BOARD
The Inphase Monitor Control board is operational only
when the generator set is running and producing elec-
tricity. Transfer will occur when UTILITY and GENER-
ATOR voltage and phase are comparatively equal with a
maximum difference of 20° between the power sources.
To assure precision matching control, minimum voltage
and frequency ranges are specified by the operator. In
addition, each inphase control is programmed with the
use of an onboard DIP switch to match the actuation
time of the corresponding switch. Inphase transfer is
used only between two live power sources and NOT dur-
ing a UTILITY source failure. The Inphase Monitor
Control board (Figure 3.13) is designed to transfer
loads under the following conditions:
• When generator set frequency is between 58-62 Hz
(48-52 Hz for 50 Hz systems).
• When generator set and utility power source frequen-
cies are within 2 Hz.
• When the generator set and utility source voltage are
within 85-100 percent of normal voltage.
• When both power sources are able to come into phase
within 10 seconds.
• When less than 10 seconds has elapsed since the
engine warmup timer has indicated "go ahead."
ENGINE
WARMUP
5 3
SEC MIN
ENGINE
MINIMUM RUN
5 30
MIN MIN
RETURN
TO UTILITY
1 30
MIN MIN
ENGINE
COOLDOWN
1 30
MIN MIN
90821B
16 Generac ® Power Systems, Inc.
Section 3 — Operation
Generac GTS "W" Type Transfer Switch
Figure 3.13 — Inphase Monitor Control Panel
85%
80%
1
SEC
0.1
SEC
If any one of the preceding conditions are not met with-
in 30 seconds, the system will automatically revert to
Time delay Neutral (if selected). If Time Delay Neutral is
not selected, the switch will transfer immediately after
failing to do an inphase transfer within the 30 second
window.
3.17.1 ENGINE WARMUP TIMER
Permits the engine to warm up before transferring
LOAD from NORMAL to STANDBY power. Reset timer
to any time interval between 5 seconds and 3 minutes;
factory set to about 1 minute.
3.17.2 ENGINE MINIMUM RUN TIMER
Establishes the minimum length of time the generator
must run before it can be shut down automatically.
Timer prevents a cold engine from being shut down. It
is factory set to about 20 minutes, but you can reset the
interval between 5 and 30 minutes.
3.17.3 RETURN TO UTILITY TIMER
Establishes time interval between restoration of NOR-
MAL source voltage above the setting of the Voltage
Pickup Sensor and re-transfer back to that source.
This time interval is necessary, to prevent re-transfer
that otherwise might occur as a result of transient volt-
ages. Timer may be reset to any interval between 1 and
30 minutes; factory set to about 5 minutes.
I N P A H
STANDBY
VOLTAGE
M O I N
95%
C O N
STDBY
STANDBY
OFF
FREQUENCY
UTIL
90%
ON
SIGNAL
OFF
BEFORE
TRANSFER
ON
30
SEC
OFF
ON
TIME DELAY
NEUTRAL
OFF
10
SEC
ON
OFF
S E
T O R
T R O L
CALIBRATION
MODE
INPHASE
TRANSFER
SELECT
SIGNAL
BEFORE
TRANSFER
WARMUP
BYPASS
TRANSFER
ON EXERCISE
WARMUP
TIMER
MINIMUM RUN
TIMER
RETURN TO
UTILITY TIMER
COOLDOWN
TIMER
INPHASE
TRANSFER
SELECTED
TDN TIMER
SIGNAL BEFORE
TRANSFER TIMER
TRANSFERRED
TO STANDBY
STANDBY RUN
SIGNAL