Functions
7.9 Test with small load
SIRIUS 3RW50 soft starter
Manual, 09/2019, A5E35628455002A/RS-AA/001
137
7.9
Test with small load
Requirements
●
The 3RW50 soft starter is connected to the main circuit.
●
The test motor is connected to the 3RW50 soft starter.
●
Permissible power range of the test motor:
–
< 10% of the rated power of the motor provided for the application
–
≥
1 kW
●
The test motor is switched off prior to the activation of the test mode function
"Test with small load".
Operating principle
The test mode function "Test with small load" is helpful during commissioning and when
troubleshooting, as the correct function of the application can be tested before installation in
a control cabinet or before the use of a motor provided for the application. The "Test with
small load" enables the wiring of the control and main circuit to be checked with the aid of a
small motor (test motor).
In the test mode function "Test with small load", the motor operating states and all functions
and messages can be executed and displayed by the 3RW50 soft starter as in normal
operation.
If, during an active "Test with small load", the 3RW50 soft starter detects a lack of main
current, a fault is generated with a shutdown command and the message text "Line voltage
for test required". After connecting the 3RW50 soft starter to the main supply this error
message can be acknowledged with RESET.
The error monitoring functions that are to be attributed to a missing or inadequate main
supply are not active. The test mode function "Test with small load" remains active until the
test mode function is deactivated.
The motor and intrinsic device protection functions of the 3RW50 soft starter remain active
according to their parameterization and are not influenced by the test mode function
"Test with small load".
