Siemens 3UG4 - Page 62

3RR2 current monitoring relays
4.4 3RR21 current monitoring relays
3UG4 / 3RR2 monitoring relays
62 Manual, 05/2016, NEB927043002000/RS-AC/004
3RR2141-.....
3RR2142-.....
3RR2143-.....
Adjustable response current
• 1
A
1.6 … 16 4 … 40 8 … 80
• 2
A
1.6 … 16 4 … 40 8 … 80
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 8 … 80
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
Relative metering precision
with
regard to measuring range
limit
% 10
Temperature drift per °C
%/°C
0.1
Current-carrying capacity
• for permanent overcurrent
maximum permissible
A
16 40 80
1)
• for overcurrent duration
< 1 s maximum permissible
A
320 800 1 600
1)
Class 10 = 80 A
Class 20 = 60 A
Class 30 = 50 A