Siemens SENTRON 3VL series, System Manual

Page: 23 / 360

Product description
3.4 Mechanical operating mechanisms
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01
23
3.4 Mechanical operating mechanisms
3.4.1 Toggle handle operating mechanism
In the basic version, the SENTRON VL circuit breakers have a toggle handle as an operating
mechanism. This also functions as an indicator of the switching position. The "Tripped"
position is also displayed in addition to the "ON" and "OFF" positions.
The toggle handle goes to the "tripped" position when the internal trip mechanism is
activated by an overcurrent situation, e.g. overload or short-circuit.
Activation by an undervoltage release or shunt release will also cause the toggle handle to
move to the "Tripped" position.
Toggle handle in the "ON"
position
The toggle handle must be returned to the
"OFF/RESET" position before the circuit breaker can be
turned back on again. This enables the internal release
mechanism to be reset. SENTRON VL circuit breakers
with toggle handle operation comply with the "Network
disconnecting device" condition (5.3.2 Section c) and
5.3.3) according to DIN EN 60204-1 (VDE 0113-1).
Toggle handle positions
ON OFF
RESET
Tripped
Toggle handle positions