Accessories
4.4 Plug-in and draw-out technology
3VA molded case circuit breakers with IEC certificate
298
Manual, 03/2019, A5E03603177010-03
Signal "Draw-out unit locked / open"
A position signaling switch to transmit this signal is installed in position 44 of the right-hand
side wall of the draw-out unit.
A position signaling switch in position 44 outputs a signal which indicates whether the
padlock locking unit is in the OUT position, thereby locking the draw-out unit.
The draw-out unit can be locked in the defined breaker positions CONNECT, TEST and
DISCON by padlocks or a cylinder lock (available as retrofit component). The position of the
molded case circuit breaker cannot be changed when the draw-out is locked. In the locked
state, the opening for the crank handle is mechanically sealed and the handle cannot be
inserted.
To lock the unit using padlocks, the padlock locking unit on the draw-out unit must be pulled
out manually so that the shackles of the padlocks can be inserted through the opening.
When the draw-out unit is locked by the cylinder lock, the padlock locking unit moves out
automatically as the cylinder lock is turned because it is mechanically coupled with the
cylinder lock in the draw-out unit. The position of the padlock locking unit ultimately
determines the position of the contacts of the position signaling switch.
