When the insulation resistance from system to ground falls below the set response value,
the alarm relays switch and the alarm LEDs activate. Two separately adjustable alarmcontacts
1 - Power On LED “ON” (green); lights when supply voltage is
applied and flashes in the event of system fault alarm
respectively in the event of CT malfunction.
2 - Alarm LED “AL1” (yellow), prewarning; lights when the set
response value IΔn1 is exceeded or flashes in the event of
system fault alarm respectively in the event of CT malfunction
3 - Alarm LED “AL2” (yellow), alarm; lights when the set response
value IΔn2 is exceeded or flashes in the event of system fault
alarm respectively in the event of CT malfunction.
4 - Multi-functional LC display
5 - Test button “T”: to call up the self test.
Arrow up button: parameter change, to move up in the menu
6 - Reset button “R”: to delete saved alarms.
Arrow down button: parameter change, to move down in the
menu
7 - “MENU” button: to call up the menu system.
Enter button: to confirm parameter change.
“ESC” button: press the button > 1.5 seconds.
1 - A1, A2 Supply voltage US see ordering information,
6 A fuse recommended
2 - Connector for the external CTUB10x-CTBC20…
CTUB10x-CTBC60 series measuring current transformer
3- 11, 12, 14 Alarm relay “K1”: IΔn1 (prewarning)
4 - 21, 22, 24 Alarm relay “K2”: alarm IΔn2 (alarm)
5 - T/R Combined test and reset button “T/R”
short-time pressing (< 1.5 s) = RESET
long-time pressing (> 1.5 s) = TEST
Do not route the PE conductor through the measuring current
transformer!
