Siemens SIRIUS 3RU Manual page 72

Configuration
6.5 Safety instructions for use in hazardous areas (3RB)
Performing the test
Correct functioning of the relay when ready for operation can only be checked with the motor
current flowing (device/electronics test). The test is initiated by pressing the TEST button.
Current sensing, the motor model, and the tripping unit are tested. If these components are
OK, the device is tripped in accordance with the table below. In the event of an error, the
device is not tripped. During the test all the protection functions are still active.
Note
The TEST button must be held down throughout the test. In this case the motor current must
be > 80% of the current setting I
max. phase
% of I
e
100 %
90 %
80 %
The switch position indicator slide can be used to test the auxiliary contacts and the control
current wiring. The tripping of the relay can be simulated by moving the slide. This simulation
process opens the NC contact and closes the NO contact, thereby checking that the auxiliary
circuit has been wired correctly. The relay is reset after a test trip by pressing the RESET
button.
Test evaluation
The user test has been completed successfully if the following criteria apply:
● The device has tripped within the maximum permissible time.
● Contact 95-96 has been opened (test for welding).
NOTICE
Damage to property
Correct functioning of the device is ensured only if both criteria are met. The device may no
longer be used if the test could not be carried out successfully.
72
CLASS 5E
[seconds] max [seconds] max
8
16
31
and equal to at least the value of the lower current setting.
e
CLASS 10E
[seconds] max
15
31
61
SIRIUS 3RU thermal overload relays / SIRIUS 3RB electronic overload relays
Manual, 09/2016, A5E03656507420A/RS-AB/003
CLASS 20E CLASS 30E
[seconds] max
29
61
122
43
92
183