Glossary - Siemens SINOVA Manual

Glossary

Auxiliary switches
Undervoltage releases and shunt releases are available.
Closing coil
Electrical closing of the energy in the spring energy store.
Current transformer
Generates energy (power supply) for the internal supply of the electronic trip unit.
Electrical closing lockout
This function is designed to electrically interlock two or more Circuit Breakers (closing
lockout). The electrical closing lockout prevents the Circuit Breaker from closing with a
continuous signal.
Finger contacts
These connect the main connection terminals on the Circuit Breaker to the main terminals on
the guide frame.
Mechanical interlock
This function supports different types of mechanical interlocking for Circuit Breakers.
Mechanical reclosing lockout
After overcurrent tripping, the Circuit Breaker is locked against reclosing until the mechanical
reclosing lockout function has been manually reset.
Position indicator
This indicates the position of the Circuit Breaker (disconnected/test/operating position) in the
guide frame.
Position signaling switch
This is used for remotely displaying the Circuit Breaker position in the guide frame.
3WJ Air Circuit breakers
Operating Instructions, 12/2022, L1V30828903001-01
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