Basic Equipment; Mounting Of The Vd4 On Trucks From - ABB VD4 Instruction Manual

3.2.2 Basic equipment

Hand-operated
breaker
1st shunt release OFF
5 pole auxiliary switches
Auxiliary switch for fault annunciation
Blocking magnet
Auxiliary switches
3.2.3 Mounting of the VD4 on trucks from other
manufacturers
VD4 circuit-breakers which are not installed on
ABB Calor Emag withdrawable parts must be fitted
with one or two additional auxiliary switches which
are dependent on the mechanical lock and release
device. These must interrupt the circuit of shunt
release ON -Y3.
Similarly to auxiliary switches -S8 and -S9 in ABB
Calor Emag withdrawable parts, no electrical pulse
may arrive during and before mechanical blocking
of the spindle mechanism, and may only be applied
again after the end of mechanical blocking.
This ensures that the shunt release ON cannot be
loaded with an electrical ON pulse when the with-
drawable part is in an intermediate position, which
could burn out the coil.
Motor-operated
breaker
-Y2 Shunt releases ON, OFF
-S3, -S4 5 pole auxiliary switches
-S7 Charging motor
-Y1 Anti-pump relais
-S2, -S6 Auxiliary switch for fault annunciation
Blocking magnet
Auxiliary switches
-Y3, -Y2
-S1, -S3, -S4
-M0
-K0
-S7
-Y1
-S2, -S6
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