135 / 582
BETA Protecting
Residual Current Protective Devices
5
SU1 RCBOs, type A
2/27
Siemens ET B1 · 10/2008
2
*
You can order this quantity or a multiple thereof.
■
Characteristic curves
Tripping characteristics according to EN 61009-1 (VDE 0664 Part 20)
If the ambient temperature is not 30 °C, the current values of the
delayed tripping operation change by approx. 5 % per 10 K
temperature difference > for temperatures lower and < for
temperatures higher than 30 °C.
If more than one electrical circuit is loaded in a series of RCBOs
or MCBs, the resulting increase in ambient temperature affects
the characteristic curve.
In this case an additional correction factor, specific to the rated
current of the RCBOs, must be taken into account.
Tripping characteristics at an ambient temperature of 30 °C
Switching capacity
Particular demands are made on the MCB component of the
RCBO with regard to switching capacity.
The values are standardized and are determined according to
the test conditions of EN 61009-1 (VDE 0664 Part 20).
The most common values are
and
.
Tripping characteristic B
Tripping characteristic C
•
Line protection mainly in outlet circuits; no proof required regarding personal
safety.
•
General line protection, especially advantageous with higher starting currents
(
lamps, motors, etc.)
30
I2_13653
20 15
10 8 65 4 3
2
1
2
4
10
20
40
2
1
4
10
20
40
6
60
120
1
6
Multiple of rated current
Tripping time
Minutes
Seconds
1.5
1.45
1.13
0.01
0.02
0.04
0.1
0.2
0.4
0.06
0.6
30
I2_13652
20 15
10 8 65 4 3
2
1
2
4
10
20
40
2
1
4
10
20
40
6
60
120
1
6
Multiple of rated current
Tripping time
Minutes
Seconds
1.5
1.45
1.13
0.01
0.02
0.04
0.1
0.2
0.4
0.06
0.6
Number
1
2 ... 3
4 ... 6
> 7
Correction factor K
1.00
0.90
0.88
0.85
Tripping characteristic Standards
Thermal trips
Electromagnetic trips
Test currents:
Test currents:
Limiting
Minimum Tripping time
Hold
Latest
Tripping time
Test current
Test current
I
n
63
A
I
n
> 63 A
tripping
instant
I
1
I
2
t
I
4
I
5
t
B
IEC 61009-1/EN 61009-1 1.13 ×
I
n
> 1 h
> 2 h
3
×
I
n
0.1
s
VDE 0664 Part 20
1.45
×
I
n
< 1 h
< 2 h
5
×
I
n
< 0.1 s
C
1.13
×
I
n
> 1 h
> 2 h
5
×
I
n
0.1
s
1.45
×
I
n
< 1 h
< 2 h
10
×
I
n
< 0.1 s
6 000
10 000
-25
(
Type A)
© Siemens AG 2008