Applications
3.3 Motor protection applications of 3VA molded case circuit breakers
3VA molded case circuit breakers with IEC certificate
150 Manual, 03/2019, A5E03603177010-03
3VA2 motor protection breaker as tested motor protection combination, 3VA2 with 3RT
The 3VA2 motor protection circuit breakers with 3RT contactors and 3RW soft starters were
tested as a motor protection combination for standard applications.
In this case, the 3VA2 molded case circuit breaker takes on the protection functions, short-
circuit protection and overload protection, and the 3RT contactor or the soft starter is
responsible for functional switching (ON/OFF) of the motor.
You will find the tested device combinations in the Siemens Industry Online Portal
(https://support.industry.siemens.com/cs/ww/en/view/109483387
).
Protection functions of 3VA2 molded case circuit breakers for motor protection
Different trip unit variants are available for the 3VA2 molded case circuit breaker. These vary
according to functionality and protection functions.
Overview of the ETU versions
1)
Adjustable tripping times with phase unbalance in firmware version 4.3 and higher.
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