Andritz SM Serie Instructions De Service page 18

Series SM
• Plan a motor protecting switch (3), as explained in the con-
nection description.
• Also plan an Emergency Stop cut-off, if this is specified or
required for your application!
L1
L2
L3
PE
1
2
I>
3
U = black
V = brown
W = blue
5.3.2 Earthing
3~
• The motor must be earthed. When dimensioning the earth
connection (4), pay particular attention to the motor power.
• For technical rules in this regard, please see EN 60034-1 and
IEC 364-5-54.
5.3.3 Overvoltage protection
L1
L2
L3
5
• Provide appropriate overvoltage protection (lightning pro-
tection) in the voltage supply (5).
4
I> I>
U V W PE
M
3~
Figure 2: Fusing and motor protection
4
PE
M
Figure 3: Earthing
Figure 4: Overvoltage protection
5.3.4 Connecting the 3-phase motor
• The motors are suitable for use in the anti-clockwise direc-
tion (viewing the motor shaft from above). A clockwise direc-
tion of rotation is only permissible if this is expressly permitted
in the contract documentation.
• The motor rotates anti-clockwise or clockwise, depending
on how it is connected.
• Connect the motor in such a way that the direction of rotation
of the motor is the same as the direction of rotation of the
pump.
• The motor rotates:
- anti-clockwise (standard), if clockwise rotation is
present with phase sequence L1-L2-L3 (you can check this
using a rotating-field-tester), and you connect the motor as
designated below
(L1-U,L2-V,L3-W).
- clockwise, if anti-clockwise rotation is present with
phase sequence L1-L2-L3 (you can check this using a rotat-
ing-field-tester), and you connect the motor as designated
below (L1-U,L2-V,L3-W).
• The direction of rotation can be changed by exchanging the
two wires.
• A motor protecting switch (overload relay) is absolutely es-
sential! Only use
- electromagnetic instantaneous tripping relays here.
- Thermal tripping relays with a temperature compensation
of from 20 °C to 40 °C of the tripping class 10A or 10 accord-
ing to EN 60947-4-1, with which the tripping time at 500%
I takes place within 10 seconds (starting with the bimetal in
N
the cold state), and which are phase failure sensitive.
• Adjust the motor protecting device to the value of the meas-
ured operating voltage, but at most to nominal motor cur-
rent I (acc. to the motor rating plate). We recommend a
N
setting which is a max. of 90% of the nominal motor current.
• Undervoltage protection must be provided.
L1
L2
L3
PE
U V W PE
M
3~
Figure 5: Direct starting
19