Operation
9.4 TEST function
SIRIUS Innovations - SIRIUS 3RU2 thermal overload relays / SIRIUS 3RB3 solid-state overload relays
Manual, 09/2014, A5E03656507420A/RS-AA/002
81
Test function for the 3RB30/3RB31 solid-state overload relay
Correct functioning of the relay when ready for operation can only be checked by pressing
the TEST button with the motor current flowing (device/electronics test). 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.
Required loading with
the rated current prior to
pressing the TEST button
CLASS 5E 3 min 30 s
CLASS 10E 5 min 1 min
CLASS 20E 10 mins 2 mins
CLASS 30E 15 mins 3 min
The TEST button must be held down throughout the test. In this case the motor current must
be > 80% of the current setting I
e
and equal to at least the value of the lower current setting.
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.
The user test has been completed successfully if:
● The device trips within the maximum permissible time and
● Contact 95-96 is open (test for welding)
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