Siemens SIRIUS 3RH Series, System Manual

Page: 405 / 786

SIRIUS 3RV2 motor starter protectors
4.8 Operation
SIRIUS Innovations
System Manual, 01/2011, A8E56203870002-03
405
Current reduction
Current reduction is required at ambient temperatures above +60 °C. The maximum
permissible current setting for an ambient temperature of +70 °C is indicated on the scale by
a slightly longer mark on the scale. You can find more information about derating in the
chapter titled Application environment (Page 396).
4.8.2 Testing the overload release
The table below shows the procedure for testing the motor starter protector's overload
release:
Step Operating instruction Figure
1 Turn the rotary button from O to I.
2 / 3 Insert a screwdriver into the test opening
and push it to the left.
TEST
Result
If the rotary button snaps into the tripped setting, the test was successful.
4.8.3 Testing the overload relay function (3RV21)
Step Operating instruction Figure
1 The control circuit must be energized.
Insert a screwdriver into the test opening
and push it down.
TEST
Result
The connected contactor disconnects.