User Manual

3RR2 current monitoring relays
4.4 3RR21 current monitoring relays
3UG4 / 3RR2 monitoring relays
52 Manual, 02/2013, NEB927043002000/RS-AA/002
3RR2141-..... 3RR2142-.....
Standby time for restart after fault s 0.3
Phase number 3
Number of monitored phases 2
Product function
• overcurrent monitoring
Yes
• undercurrent monitoring
Yes
• overcurrent and undercurrent monitoring
Yes
• apparent current monitoring
Yes
• active current monitoring
No
• undercurrent recognition of 3 phases
No
• phase sequence recognition
No
• can be activated or deactivated phase
sequence recognition
No
• 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
— …
Response value residual current detection at
50/60 Hz typical
A
—
Type of current for monitoring AC
Measurable current
• for AC
A
1.6 … 16 4 … 40
Adjustable switching hysteresis for measured
current value
A — …
Relative switching hysteresis for measured
current value
% 6.25
Response time maximum s 0.3
Relative repeat accuracy % 2
Temperature drift per °C %/°C 0.1
Current-carrying capacity
• for permanent overcurrent maximum
permissible
A
16 40
• for overcurrent duration < 1 s maximum
permissible
A
320 800