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OPERATION
Most diesel generators are controlled like the Onan type, except that they also require that glow plugs be
operated before the generator start is attempted. The SW Series Inverter/Charger automatic generator
control system can also provide glow plug control. The addition of an external relay may be required to
operate the glow plugs due to the amperage required by the glow-plugs and to separate the stop signal
circuit. For this type of generator, select GLOWSTOP from the SET RY7 FUNCTION menu item under the
GEN STARTING DETAILS (13) menu heading.
3-TO-2 WIRE CONVERTERS
Another option for three-wire start-type generators is a 3-to-2-wire converter which vary from simple relays
to advanced microprocessor types. Onan offers a simple 3-to-2-wire converter that works well for many
installations. Universal 3-to-2 wire converters can be used with virtually any generator as well as control
glow plugs for diesel generators.
generator control system to start.
GENERATOR CONTROL SEQUENCE
The relays close in a specific sequence to start the generator. Some of the timing periods are adjustable
through the GEN STARTING DETAILS (13) menu heading. GLOWSTOP has been added to the
sequence for diesel generator applications. RY7 can be configured for either "RUN" or "GLOWSTOP"
operation. The two control relays complete the following sequence:
The 'auto generator control sequence' is initiated if the battery voltage remains below the 'Set start volts DC' setting (unless
'Start/End Quiet time h:m' is enabled) for the required period of time or the 'Read LBCO 30 sec start VDC' setting for 30 seconds;
or if the load amps reaches the 'Load Start amp AC' setting longer than the 'Set Load Start delay min' period. The manual
generator control sequence is initiated if generator is manually turned on via 'Set Generator' to ON.
First 'auto
generator
attempt'
RY7
OFF
RUN (or)
GLOW-
OFF
ON
STOP
START
SET PRE
DELAY
CRANK
PERIOD
SECONDS
8 SECS
10 SECS.
FIXED
DEFAULT
RY8
Time (Sec) 0
8
Figure 26, Relay RY7 and RY8 Sequence
2001 Xantrex Technology, Inc.
Page
5916 - 195th Street N. E.
78
Arlington, WA 98223
These also feature additional system components to signal the
The auto generator stop sequence
is initiated if: (1) The battery
start
voltage has been held at the 'Set
Bulk volts DC' setting for the 'Set
Absorption time h:m' period or (2)
The load amps drops below the
'Load Start amps AC' setting for
longer than the 'Set Load Stop
delay min' period.
ON (engages to the N.O. position)
OFF (engages to the N.C. position)
SET MAX
SET GEN
LOCK ON
CRANKING
WARM-UP
GOOD
SECONDS
SECONDS
DELAY
PERIOD
10 SECS
60 SECS
DEFAULT
DEFAULT
12 SECS
FIXED
(RY8 goes
(Starts once
off with a
voltage
(Starts when
1 sec delay
exceeds
AC is within
when
80 VAC)
108 to 132
AC HOT IN
VAC
>80 VAC)
and
53-67 Hz)
ON
OFF (engages to the N.C. position)
18
28
88
GEN CONTROL RELAYS
OFF = relay contact closed from N.C. to COM (relay disengaged)
ON = relay contact closed from N.O. to COM (relay engaged)
The generator will stop
immediately with an
inverter fault or if 'Set
Generator' is set to
OFF. Also a "Kill Before
Cranking" signal is
enabled before the next
'auto generator start
attempt'
OFF
ON
GEN-RUN PERIOD
COOL
Generator is
DOWN
off and
(Determined by the
PERIOD
waiting for
voltage and time
next 'auto
settings under the
40 SECS
generator
'BATTERY
FIXED
start
CHARGING' heading
sequence
or by the current and
(Only used
delay min settings
with 'Set
under the 'GEN
Generator' to
AUTO START
AUTO)
SETUP' heading)
100
+100 +140
Telephone: 360/435-8826
Fax: 360/435-2229
www.traceengineering.com
Second
Next 'auto
'auto
generator
generator
Start
start
sequence
has been
attempt'
initiated
ON
OFF
ON
START
SET PRE
DELAY
CRANK
PERIOD
SECONDS
8 SECS
10 SECS.
FIXED
DEFAULT
0
8
18
SW Series Inverter/Charger
Part No. 2031-5
Rev. C: February 2001
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