Siemens MICROMASTER 420 - Fig. 3-18 Motor Terminal Box

3 Functions Issue 07/04
MICROMASTER 420 Operating Instructions
66 6SE6400-5AA00-0BP0
IEC Motor
e.g.: Volts 230 V (Delta connection) / 400 V (Star connection)
U1
V1
W1
Star connection
W2
U1
U2
V1
V2
W1
Delta connection
U1
V1
W1
W2
U1
U2
V1
V2
W1
NEMA Motor
T
1
T
4
T
7
T
3
T
6
T
9
T
8
T
5
T
2
Volts
UVW
T
1
-T
7
T
2
-T
8
T
3
-T
9
low
T
4
-T
5
-T
6
T
1
T
2
T
3
high
Connected
together
Connection
T
1
-T
7
T
2
-T
8
T
3
-T
9
Y Y
Y
UVW
T
1
-T
6
-T
7
T
2
-T
4
-T
8
T
3
-T
5
-T
9
-
T
1
T
2
T
3
T
4
-T
7
T
5
-T
8
T
6
-T
9
∆ ∆
∆
T
1
T
4
T
7
T
2
T
5
T
8
T
3
T
9
T
6
Volts
low
high
Connected
together
Connection
e.g.: Volts 230 V YY (low) / 460 V Y (high)
Fig. 3-18 Motor terminal box
The following must be noted when entering the rating plate data or the ESB data:
 The rated motor voltage P0304, the rated motor current P0305 and the stator
resistance P0350 must always be entered in accordance with the motor circuit
configuration (either delta or star).
 If the rated motor data that is available (P0304, P0305, P0350) does not match
the motor circuit configuration, then the appropriate conversion (refer to Fig.
3-19) must be made and then entered.
NOTE
The outer conductor voltage/phase-to-phase voltage (voltage U
12
between outer
conductors L1, L2) and the outer conductor current (phase current) I
1
are always
specified on the rating plate.