DSE Model 5520 Automatic Mains Failure Control and Instrumentation System Operators Manual
5520 OPERATING MANUAL ISSUE 1 04/02/05 AM
34
TEST
Thi
s
push-
but
t
on
pl
aces
t
he
modul
e
i
nt
o
i
t
’
s
‘
Test
’
mode. This mode is
used to test the function and timing of the generator start and load
sequence. The mode is initiated by pressing the
‘
St
ar
t
’
But
t
on
and the
set will be automatically started and placed on load. The set will run on
load continuously. To test the off-loading and stopping sequence return
the set to the
‘
Aut
o’
mode, the module will automatically transfer the
load from the generator and shut the set down observing the
stop delay
timer
and
cooling timer
as necessary. The module will then await the
next start event.
For further details please see the more detailed
descr
i
pt
i
on
of
‘
Test
Oper
at
i
on’
ear
l
i
er
i
n
t
hi
s
manual
.
ALARM MUTE
This push-button is used to silence the internal alarm sounder and also
any external sounder devices fed from the
audible alarm output
. Any
further alarm conditions will reactivate the sounder. Once the alarm has
been muted and investigated it may then be cleared.
Ref
er
t
o
t
he
‘
Pr
ot
ect
i
ons’
sect
i
on
of
t
hi
s
manual
f
or
det
ai
l
s.
When the
Alarm Mute
is operated a
Lamp test function
will also be
implemented and all LED indicators will be illuminated.
TRANSFER TO GENERATOR
This push button is used to control the closure of the generator load
switching device and has three modes of operation :
1. Synchronising is NOT enabled. Pressing this button when the
generator is running off load and in MANUAL mode, the mains load
switch is opened. After a delay (load transfer time), the generator
load switch is closed. Further presses of this button will have no
effect.
2. Synchronising is enabled. Pressing this button when the generator is
running and in MANUAL mode, the 5520 controller will volts match
and synchronise with the mains supply. The generator load switch is
then closed in parallel with the mains supply.
3. Synchronising is enabled. Pressing this button when the generator is
running in parallel with the mains supply and in MANUAL mode, will
open the mains load switch and after a delay (load transfer time), the
mains load switch is opened (transferring the load to the generator
supply).
NOTE:- This button is only active in MANUAL mode.