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4
ATS-33
Feature 1 : Generator Duty Cycle
– start attempts
settings
You can program the ATS-33 to switch the lead
generator duty by time or start-run attempts. When the
working generator times out, or runs a number of times
the ATS-33 starts the next generator and makes this
one the lead generator. (See lines 3 & 4)
Adjustable duty time range
：
01
999 Hours.
Feature 2 : Transferring Time Delay
The ATS-33 control unit provides a time delay when
transferring the switch from the primary to standby
generator. Countdown begins when the standby source
becomes available. (Refer to program line 5 & 6)
Adjustable time delay range
：
00
250 sec
Feature 3 : Time Delay Engine Cool-down
Controller permits the generator to continue to run
unloaded after retransfer to the other generator is
complete. Countdown begins when the transferring is
complete. (Refer to program line 7)
Adjustable time delay range
：
00
250 sec
Feature 4 : Time Delay OFF Position
Time Delay on OFF keeps the switch in the center
neutral OFF position (completely disengaged) before
transferring to the other side. (Refer to program line 8)
Adjustable time delay range
：
00
99 sec
Feature 5 : Under / Over voltage Sensing
The controller monitors the voltage of each phase of
both
generators’ power source. User adjustable
settings are provided. (Refer to program line 9, 10, 11,
15, 16 & 17)
Adjustable over voltage range
：
110
500 Vac
Adjustable under voltage range
：
80
470 Vac
Feature 6 : Under / Over frequency Sensing
The controller monitors the frequency of the normal and
standby power source. User adjustable settings are
provided. (Refer to program line 12, 13, 14, 18, 19 &
20)
Adjustable over frequency range
：
51
70 Hz
Adjustable under frequency range
：
45
59 Hz
Feature 7 : Fail Alarm Output
There are three different abnormal statuses whereby
the controller will setoff the dry contact alarm output.
The auxiliary contact may be wired to a highly audible
alarm panel to indicate a malfunction with the ATS
system. The three abnormal statuses are
：
● Send start signal failure / generator fails to start.
● Transfer failure occurred.
● Abnormal voltage and frequency during generator
duty time period.
SECTION 2 : OPERATOR PANEL
2.1 General
Get acquainted with the ATS-33
：
● Front Display Window
● Operate Touch Buttons
● Panel LEDs Display
2.2 Display Window
The ATS-33 controller has a four-digit, seven-segment
displayer to monitor all parameters, setting and
messages.
The screen display’s
：
● Dual generators voltage / Duty time / Parameter
display
● Time delay countdown display
● Program setting parameter display
