3RR2 current monitoring relays
4.4 3RR21 current monitoring relays
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
53
3RR21 current monitoring relays
4.4.1
Operator controls and connection terminals
Front view / terminal labeling (basic version)
Connection for contactor mounting or for stand-alone
assembly
Rotary button for setting the threshold for overshoot "I▲"
Rotary button for setting the threshold for undershoot "I▼"
④
Sliding switch "Memory" for selecting the reset response
parameter (manual/autoreset):
Control circuit terminal (removable):
The control circuit can be connected using either the
screw-type or the spring-loaded connection system.
⑥
Main circuit terminal (permanently connected) :
The main circuit can be connected using either the screw-
type or the spring-loaded connection system.
Label (below which there is a DATAMatrix code)
Device article number
Rotary button for startup delay time "onDel (s)"
⑩
Rotary button for tripping delay time "Del (s)"
⑪
Status display via "Ready" LEDs (green) for auxiliary
voltage and "Fault" (red) for switching state
32 Output relay K1 changeover contact NC
31 Output relay K1 changeover contact root
34 Output relay K1 changeover contact NO
Feed-through contactor auxiliary switch (S00)
Feed-through contactor coil terminal (S00)
You can find additional information on the connection terminals and the permissible
conductor cross-sections in the Chapter "Connection methods (Page 21)".
You can find information on connecting in the Chapter "Circuit diagrams (Page 59)".
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