Technical information
16
V23C_09.13
SC4000 Pos 2
Platform is supplied with 400 V/50 Hz AC
mains.
The electrical installation of the platform
consists of the following circuits:
-
Power circuit 3 x 400 V
- Control circuit,
safety separated 48 V
- Signalling circuit 230 V
- Tool circuit for hand
tools, protected against
fault current / 30 mA 230 V
Power circuit
The pover circuit is responsible for feeding
the electric motors (M1, M2 and M3) and
the disk brake of the motors.
The control centre of the chassis is re-
spon si ble for chassis drive. It consists of
supply socket (X1), main switch (Q1),
phase-inverter switch (Q1.1), motor pro-
tection fuses (F1, F2), directional con-
tactors (K1-K3), and transformer (T1) for
con trol circuit.
The control centre of the platform is re-
spon si ble for vertical drive. It consists of
main switch (Q2), motor protection fuses
(F10, F11), phase control relay (F8), di rec-
tional contactors (K4-K7) and protection
fuse (F7) for the protection transformer
(T2).
Main switches switch off power- and
control circuits. Motor protection fuse
closes power circuit in case of failures,
overload and short-circuit. Phase con trol
relay constitutes also protection of cir cuit
in case of phase direction change.
2.3. ELECTRICAL INSTALLATION
WARNING!
THE MAIN SWITCH (Q2) IN PLAT-
FORM ELECTRIC BOX DOES NOT
DISCONNECT THE ELECTRICITY
OUT OF THE SOCK ETS (E1 AND E2)
AND THE HOOTER (H2).
Control circuit
Chassis drive control circuit in chassis
drive electric box consists of chassis drive
interlocking limit switch (S10) and contac-
tor coils (K1-K3).
The circuit is protected against short
circuit by automatic fuse (F3). The chas-
sis will be controlled through the remote
control (E3) which is connected to the
chassis electic box socket X3.
Same remote control (E3) is used for
both chassis and platform. For chassis
drive there is a push-button (S4) forward,
(S5) backward and an emergency stop
(S6).
Platform control circuit
in platform elec-
tric box consists of key switch (S3), safety
brake switch (S13), limit switch (S11) for
top and bottom position S, safety limit
switch (S12) for S11, safety sensor (B1) for
mast assem bly (in ductive), safety sensor
(B2) for alarm hooter (H2) and con tactor
coils (K4-K10).
The circuit is protected against short
circuit by protection fuse (F7). The con trol
voltage 48 V is fed by protection trans-
former (T2).
The platform is controlled through a
re mote control (E3) which is the same as
used for the chassis drive. Remote con trol
consists of push-button (S4) up, (S5) down
and emergency stop (S6).
Signalling circuit consists of hooter push-
button (S2) and hooter (H2). The circuit is
protected against short circuit through
an automatic fuse (F6). The signal can be
given by pushing the hooter push-button,
which is on platform electric box.
When the platform is lowered or raised
the hooter (H2) on the bottom-area of
the plat form signals au to matically af ter
the safety sensor (B2) is activated by the
sig nalling bar at adjusted height.
Socked circuit for hand tools
!
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