Siemens 420 manual IEC Motor, Nema Motor

3 Functions Issue 07/04

IEC Motor

W2 U2 V2

U1 V1 W1

W2 U2 V2

U1 V1 W1

U1

Delta connection

V1

W1

U1

Star connection

V1

W1

e.g.: Volts 230 V (Delta connection) / 400 V (Star connection)

NEMA Motor

T

1

Connected

Volts

U

V

W

Connection

T4

together

T7

low

T1-T7

T2-T8

T3-T9

T4-T5-T6

Y Y

high

T1

T2

T3

T1-T7

T2-T8

T3-T9

Y

T T9

T8

e.g.: Volts 230 V

YY

(low) /

460 V Y

(high)

6

T5

T3

T

2

T1

Volts	U	V	W	Connected			Connection
				together
low	T1-T6-T7	T2-T4-T8	T3-T5-T9	-			∆ ∆
high	T1	T2	T3	T4-T7	T5-T8	T6-T9	∆	T3

TT9 TT4

6 7

T8 T5

T2

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 U12 between outer conductors L1, L2) and the outer conductor current (phase current) I1 are always specified on the rating plate.

MICROMASTER 420	Operating Instructions
66	6SE6400-5AA00-0BP0