Alarm And Protection - ABB RVC Installation And Operating Instructions Manual

Protection 3: Over THDV (Max THDV)
If the THDV exceeds this over THDV limit set by the user, all steps
are disconnected. The reset delay time (default 40 sec) is
automatically doubled each time this event takes place.
Below certain specified THD level, this protection is disabled. This
condition is shown by a "

ALARM AND PROTECTION

RVC controller has a Normally Open (NO) type of alarm contact.
This contact activates (OPEN) when the following situation arise:
Reset
(40s)
Alarm ON
cos ϕ ϕ
Over- ON blinking ON
temperature
Over- ON blinking
voltage
Under- ON blinking
voltage
Over ON blinking
THDV
" display on the screen.
blinking
ON
Alarm
relay
closed disconnected
open all connected
open disconnected when
open disconnected
ON open fast disconnection
ON open disconnected
9
since more than
6 min.
T internal > 85°C
<1 network period