Siemens 3UG4 - Page 80

3RR2 current monitoring relays
4.5 3RR22 current monitoring relays
3UG4 / 3RR2 monitoring relays
80 Manual, 05/2016, NEB927043002000/RS-AC/004
3RR2241-.....
3RR2242-.....
3RR2243-.....
Mechanical operating cycles
as operating time typical
10 000 000
Electrical operating cycles
as operating time
at AC-15
at 230 V typical
100 000
Precision of digital display
+/-1 digit
Adjustable response delay
time
• when starting
s
0 … 99
• with lower or upper limit
violation
s 0 … 30
Standby time
for restart
after fault
s 0.2
Phase number
3
Number of monitored
phases
3
Product function
• overcurrent monitoring
Yes
• undercurrent monitoring
Yes
• overcurrent and
undercurrent monitoring
Yes
• apparent current
monitoring
Yes
• active current monitoring
Yes
• undercurrent recognition
of 3 phases
Yes
• phase sequence
recognition
Yes
• can be activated or
deactivated phase
sequence recognition
Yes
• self-reset
Yes
• reset external
No
• manual RESET
Yes