Mechanical Operating Mechanisms; Toggle Handle Operating Mechanism - Siemens SENTRON 3VL System Manual

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
Toggle handle positions
ON
Toggle handle positions
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01
3.4 Mechanical operating mechanisms
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).
OFF
RESET
Product description
Tripped
23