ATR243 - User manual -
21
Max
Min
Zero
7.10 Loop Break Alarm On Current Trasformer
This function allows to measure load current and to manage an alarm during malfunctio-
ning (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
or
AL. 3
as
AL. 4.
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
SET
This key enables to scroll
on display 2 the output
percentage, auto / man
selection, setpoint and
alarms.
Press
SET
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.
Setting on parameter 48
L.b.A.t.
the value 0 it is possible to visualize the current absorbed
without generating the Loop Break Alarm.