Operating Instructions

Electrical Installation
Siemens Building Technologies, Inc. 39
Motor Connection
(Wye "Y"/Star or Delta Configuration)
DANGER:
Do not use the SED2 with a motor of higher nominal power
rating than the SED2, or a nominal power less than half that
of the SED2. Only operate the SED2 when the nominal
current (P0305) is set to match motor rating continuous
current.
The motor nameplate indicates the required supply voltage and
method of connection. In general, larger 400/690V motors connect in a
delta (Δ) configuration and smaller 230/400V motors connect in a Wye
“Y” or star configuration (Figure 24).
Connect motor wiring to SED2 terminals U, V, and W (Figures 19
through 22).
MOTOR TERMINALS
U2 V2W2
U1 V1 W1
U2 V2W2
U1 V1 W1
VFD0029R2
Wye "Y"
Figure 24. Delta and Star (Wye, Y) Motor Connections.