User Manual

3RR2 current monitoring relays
4.5 3RR22 current monitoring relays
3UG4 / 3RR2 monitoring relays
68 Manual, 02/2013, NEB927043002000/RS-AA/002
3RR2241-..... 3RR2242-.....
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
Adjustable response current
• 1
A
1.6 … 16 4 … 40
• 2
A
1.6 … 16 4 … 40
Factor as multiple of the current monitoring
upper limit
• for the adjustable value of a blocking current
2 … 5
Response value residual current detection at
50/60 Hz typical
A
1.5 4
Relative metering precision with regard to
measured value
% 5
Type of current for monitoring AC
Measurable current
• for AC
A
1.6 … 16 4 … 40
Adjustable switching hysteresis for measured
current value
A 0.1 … 3 0.1 … 8
Relative switching hysteresis for measured
current value
% —
Response time maximum s 0.2
Relative repeat accuracy % 2