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. These also feature additional system components to signal the 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.

RY7

First ’auto generator start attempt’

The auto generator stop sequence

is initiated if: (1) The battery

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.

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'

Next ’auto generator Start sequence has been initiated

Second

‘auto

generator

start attempt’

RUN (or)

OFF

 

 

ON (engages to the N.O. position)

 

 

OFF

 

GLOW-

 

 

 

OFF (engages to the N.C. position)

 

 

 

 

OFF

ON

 

 

 

ON

OFF

STOP

 

 

 

 

 

 

 

 

 

 

 

 

 

START

SET PRE

SET MAX

SET GEN

LOCK ON

GEN-RUN PERIOD

COOL

Generator is

START

 

 

DELAY

CRANK

CRANKING

WARM-UP

GOOD

 

DOWN

off and

DELAY

 

PERIOD

SECONDS

SECONDS

SECONDS

DELAY

(Determined by the

PERIOD

waiting for

PERIOD

 

 

 

 

 

PERIOD

voltage and time

 

 

next ’auto

 

 

8 SECS

10 SECS.

10 SECS

60 SECS

 

settings under the

40 SECS

generator

8 SECS

 

FIXED

DEFAULT

DEFAULT

DEFAULT

12 SECS

’BATTERY

FIXED

start

FIXED

 

 

 

 

 

FIXED

CHARGING’ heading

 

 

sequence

 

 

 

 

(RY8 goes

(Starts once

 

or by the current and

(Only used

 

 

 

 

 

off with a

voltage

(Starts when

delay min settings

with ’Set

 

 

 

 

 

1 sec delay

exceeds

AC is within

under the ’GEN

Generator’ to

 

 

 

 

 

when

80 VAC)

108 to 132

AUTO START

AUTO)

 

 

 

 

 

AC HOT IN

 

VAC

SETUP’ heading)

 

 

 

 

 

 

 

>80 VAC)

 

and

 

 

 

 

 

 

 

 

 

 

53-67 Hz)

 

 

 

 

 

ON

ON

SET PRE

CRANK

SECONDS

10SECS.

DEFAULT

RY8

ON

OFF (engages to the N.C. position)

Time (Sec) 0

8

18

28

88 100

+100 +140 0

8

18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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)

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 26, Relay RY7 and RY8 Sequence

Page

78

2001 Xantrex Technology, Inc.

Telephone: 360/435-8826

SW Series Inverter/Charger

5916 - 195th Street N. E.

Fax: 360/435-2229

Part No. 2031-5

Arlington, WA 98223

www.traceengineering.com

Rev. C: February 2001

Page 86
Image 86
Xantrex Technology SW Series owner manual Generator Control Sequence, TO-2 Wire Converters

SW Series specifications

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