- 52 -
6.
Parallel
operation
[Note]
This
section
is
to
explain
only
the
procedures
for
parallel
operation
that
are
different
from
the
general
single
unit
operation.
For
the
same
procedures
with
those
for
single
unit
operation,
read
「
4.
Connecting
the
load
」
and
「
5.
Operation
」.
In
the
case
where
the
required load
capacity
exceeds
the
generator capacity, the
parallel
operation
is
useful
by
paralleling
electrically
generators
of
2
units
or
more.
However,
note
that
the
stable
parallel
operation
requires
the
equality
of
output
voltages,
frequencies,
engine
governor
characteristics,
etc.
For
this
reason,
it
is
requested
for
easy
paralleling
to
select
the
same
model of the
generating
sets.
Study
this
manual
carefully
before
paralleling
the
units.
6-1
Preparation
for
parallel
operation
(1)
Turn
off
the
main
circuit
breakers
on
all
the
units,
and
stop
the
engines.
(2)
Set
the
voltage
selector switch
on
each
unit
to
the
same
voltage.
(3)
Connect
each
unit
and
load
as
shown
below,
referring
the
terminal
symbols.
Use
a
phase
tester
to
check
the
sequence
of
the
phases.
Generator
1
Generator
2
Generator
3
U V W
U V W
U V W
Circuit breaker
No
.1
No
.2
No
.3
Load
[Note]
Connect
the
cables
in
the
correct
sequence
of
the
3-phases,
check
the
terminal
symbols.
(4)
Turn
the
single-parallel
change-over
switch
to
"PARALLEL"
position
on
each
control
panel
.
Summary of Contents for DCA-150LSKE
Page 2: ...Japan...
Page 18: ...14 16 environmental base fluid level warning lamp...
Page 55: ...51 When the single parallel change over switch is parallel side device acts...
Page 93: ...89 12 2 Outline drawing...
Page 94: ...90 12 3 Generator connection diagram...
Page 95: ...91 12 4 Engine wiring diagram...
Page 96: ...92 12 5 Controller wiring diagram...
Page 101: ...97...
