Siemens 3UG4 - Page 81

3RR2 current monitoring relays
4.5 3RR22 current monitoring relays
3UG4 / 3RR2 monitoring relays
Manual, 05/2016, NEB927043002000/RS-AC/004
81
3RR2241-.....
3RR2242-.....
3RR2243-.....
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
2 … 5
Response value residual
current detection
at 50/60
Hz
typical
A
1.5 4 8
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 8 … 80
Adjustable switching
hysteresis for measured
current value
A
0.1 … 3 0.1 … 8 0.2 … 16
Relative switching hysteresis
for measured current value
%
—
Response time maximum
s
0.2
Relative repeat accuracy
%
2
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