SIEMENS
6/13
Siemens MD 50.8 · 2017
Motor options
Mechanical design
Motor connection and terminal boxes
6
■
Connection, circuit and terminal boxes
(continued)
Motor connection YY/Y
Fig. 6/13
Connection circuit diagram, motor connection YY/Y
Terminal connection
The terminal board accommodates the terminals that are
connected to the leads to the motor windings.
The terminals are designed so that up to frame size 100, the
external (line) connections can be established without requiring
cable lugs.
Terminal box assignment
-M
U
W
V
-M
U1
W1
V1
U2
W2
V2
U3
W3
V3
-M
U
W
V
=
T1
U1
=
T2
V1
=
T3
W1
=
=
T4
T7
U2
U3
=
=
T5
T8
V2
V3
=
=
T6
T9
W2
W3
=
T1
U
=
T2
V
=
T3
W
=
T1
U
=
T2
V
=
T3
W
U
L3
L2
L1
PE
[U2,V2,W2];
[W1,W3]
[V1,V3];
[U1,U3];
V
W
U
L3
L2
L1
PE
[V2,V3];
[U2,U3];
[W2,W3]
V
W
U1
V1
W1 PE
U2
V2
W2
U3
V3
W3
3
M
3
U
V
W
PE
M
PE
U
V
W
3
M
U1
U2
U3
W3
W2
V1
V3
W1
V2
Motor frame size
Terminals
Number of
cable entries
Terminal box
material
Line feeder
cable connec-
tion
Auxiliary terminals
Number
Contact screw
thread
Max.
connectable
conductor
Max.
number
Max.
connectable
conductor
mm
2
mm
2
63
6
(9 for
YY/Y motor
connection)
M4
1.5 (2.5 with
cable lug)
2 cable entries
with screw
plugs
Aluminum
alloy
With or
without
cable lug
8
2.5
71
80
90
100
4
10
112
132
6
© Siemens AG 2017