ABB RVT Serie Instrucciones De Instalación Y De Funcionamiento página 49

protection initiated by the opto-isolated input 2. The alarm relay provides one NO and
one NC contact.
Once a protection level is reached, the following actions occur:
- all the capacitor steps are switched off
an alarm message appears on the display
-
- the alarm relay is activated ( NO opens / NC closes )
- the icon
Note: if the external input signal IN2 (description in paragraph 2.4) is activated, all
capacitor steps are switched off and the Ext. prot. parameter drives the behavior of the
alarm relay:
- Disconnection and alarm
- Disconnection only (no alarm)
After the event has disappeared, the RVT will restart its normal operation after a certain
delay time. This delay time depends on the type of events. RVT post alarm restarting
procedure is described in detail in Appendix A4.
Note: when enabled, the external protection (Ext. Prot.) may be activated by applying an
external signal through the RVT digital input 2 (see paragraph 1.4).
4.3.1.4.2Warnings
Warnings level are basically will be lower than protection levels. When a warning level is
reached, following actions will occur:
- the fan/warning relay is activated: the NO contact will close
- the icon
48 Measurements and Settings ç Power Factor Controller RVT
is highlighted
is highlighted
Figure 41: RVT warning settings