4
3ZX1012-0RB20-1CA1
2.5 User test (device test)
The test according to EN 60079-17 can be carried out together with the
user test. The device must be taken out of operation if the test results
are negative.
Initialization
• The three phase currents running through the 3RB2 must be as sym-
metrical as possible.
• The phase currents must be
≥
80 % of the set current I
e
.
• The currents must flow at least for the time t
1
before starting the test.
• The phase currents must be at least the same size as the value set
for the lower setting mark of the current setting.
Test implementation
During the test all the protection functions are still active. The test is
initiated by pressing the TEST button (see device test in operating
instructions 3ZX1012-0RB20-1AA1 and 3ZX1012-0RB20-1BA1).
After the TEST button has been pressed, the device must trip within
the following time periods:
Test evaluation
The user test is considered to be carried out successfully if
• the device trips within the maximum permissible time limit
• contact 95-96 opened (not welded shut)
2.6 Additional safety instructions
2.7 Ambient conditions
Permissible ambient temperature range
• Storage / transport: -40 °C to +80 °C
• Operation:
-25 °C to +60 °C
This device is maintenance-free.
To meet the conditions of the warranty, you must observe the safety
and commissioning instructions and the operating instructions
3ZX1012-0RB20-1AA1 for 3RB201 to 3RB204 and 3RB211 to 3RB214
and
3ZX1012-0RB20-1BA1 for 3RB205 / 3RB206 / 3RB215 / 3RB216.
Further information about the 3RB20 / 3RB21 can be found in Siemens
Industrial Controls Catalog IC 10 or on the Internet:
http://support.automation.siemens.com
CAUTION
This test must be carried out by a specialist familiar with the stan-
dards stated!
Class
5E
10E
20E
30E
t
1
[minutes]
3
5
10
15
Max. phase
Class 5E
Class 10E Class 20E Class 30E
% von I
e
[s] max.
[s] max.
[s] max.
[s] max.
100 %
8
15
29
43
90 %
16
31
61
92
80 %
31
61
122
183
NOTICE
Correct functioning of the device can only be guaranteed when
these two criteria are met.
CAUTION
3RB20 and 3RB21 are not designed for load-side operation for
frequency converters.
!
3. Safety data
Values in the safety and commission-
ing instructions for 40 °C ambient
temperature plus 10 K due to self-
heating
SIL
SIL 1
HFT
0
λ
safe
440 * 10
-9
1/h
λ
DD
105 * 10
-9
1/h
λ
DU
296 * 10
-9
1/h
SFF
65%
DC
26%
MTBF
130 years
PFD
avg (for 36 months)
< 1,0 * 10
-2
Architecture
1001
T1 value
(repeat test)
DIN EN 60079-17, Section 4.4
T
lifetime
20 years
4. Maintenance and repair
5. Warranty
6. Further information
