TAVRIDA ELECTRIC VCB Series, User Manual

Page: 54 / 142

54
The following conditions must be fulfilled when designing mechanical
interlocking:

If the interlocking mechanism is attached to one of the interlocking pins, the weight of the directly attached
movable part to the interlocking pins shall not exceed 0.35 kg. If both interlocking pins are used, the sum
of the attached weights shall not exceed 0.35 kg (Figure 93).

If the attached part is joined with a lever mechanism, the weight (including directly moved parts) shall be
decreased in proportion of the lever (Figure 94).

If the interlocking mechanism is directly attached with the synchronizing shaft the moment of inertia of the
attached mechanism shall not exceed 4.3 x 10
-4
kg*m
2
. If both stub shafts of the synchronizing shaft are
used, the sum of the attached moments of inertia shall not exceed 4.3 x 10
-4
kg*m
2
respectively
1.2 x 10
-4
kg*m
2
(Figure 92).

For manual-emergency-tripping a force of up to 250 N may be applied to the interlocking pins. But no
static force shall be applied (Figure 93).

It is not allowed to perform electrical trip/close commands while the interlocking pins or the synchronizing
shaft are blocked mechanically.
Figure 93
Mechanical interlocking by interlocking pins
Figure 94
Direct connection of the interlocking mechanism to the synchronizing shaft