36 / 267
3VT1 Molded Case Circuit Breakers up to 160 A
Accessories and Components
Manual operating mechanisms
2/26
Siemens LV 36 · 2008
2
Mechanical interlocks and mechanical interlocks for parallel switching
3VT9 100-8LA00 mechanical interlocking
The mechanical interlocks are for the mechanical interlocking of
two circuit breakers so that they cannot be tripped simulta-
neously, but always just individually. Both circuit breakers may
be switched off simultaneously. Interlocking can be used be-
tween two 3VT1 circuit breakers. Each circuit breaker must be
furnished with a manual operating mechanism – at least one with
a manual operaitng unit and a knob,
(see page 2/25)
. In order to
use the interlocking, it is absolutely necessary to comply with the
dimensions shown in the figure and given in the table.
Arrangement of circuit breakers/switch disconnectors with
3VT9 100-8LA00 mechanical interlocks
3VT9 100-8LB00 mechanical interlocks for parallel switching
Mechanical interlocks for parallel switching are for simultaneous
switching of two circuit breakers. Parallel switching can be used
between two 3VT1 circuit breakers. Each circuit breaker must be
furnished with a manual operating unit and at least one with a
knob
(see page 2/25)
. In order to use parallel switching, it is ab-
solutely necessary to comply with the dimensions shown in the
figure and given in the table.
Arrangement of circuit breakers/switch disconnectors with
3VT9 100-8LB00 mechanical interlocks for parallel switching
Dimensions
mm
X
87.5 or 100
L
94.5 or 106
NSO0_00057
L
X
NSO0_00059
12.5 or 25
Dimensions
mm
X
75 or 87.5 or 100
L
L
NSO0_00058
X
L
NSO0_00060
0 or 12.5 or 25