Pixsys DRR 245, Start Manual

Page: 22 / 59

22 - DRR245 - User manual
Max
Min Zero
9.1 Loop Break Alarm On Current Trasformer
This function allows to measure load current and to manage an alarm during
malfunctioning (with power in short circuit or always off ).
The current transformer connected to terminals 15 and 16 must be 50 mA
(sampling time 80 ms).
• Set end scale value of the current transformer in Amperes on parameter 47
t.a.
• Set the intervention threshold of the Loop Break Alarm in Amperes on
parameter 48
L.b.a.t.
• Set the intervention delay time of the Loop Break Alarm on parameter 49
L.b.a.d.
• It is possible to associate the alarm with a relay by setting the parameter
AL.
1
,
AL. 2
as
L.b.a.
If a remote control switch or SSR remains closed, controller signals the fault
by showing
L.b.a.c.
on display 2 (alternatively with a command setpoint).
If the power stage remains open, or the load current is lower than the value
set on
L.b.a.t.
, controller shows
L.b.a.o.
on display. It is possible to display the
current absorbed during the closure phase of the power stage.
Press Display Do
1
|
This key enables to scroll
on display 2 the output
percentage, auto / man
selection, setpoint and alarms.
Press
|
until the writing
am.t.a.
appears on display 1
and display 2 shows the current
in amperes (
t.a.
>0).
The value is also maintained
when no current circulates on
the load.