Siemens SIMOTICS GP Operating Instructions Manual page 74

IMPORTANT:
pairs. However, this does not indicate that the motor is suitable for "Delta-
Wye" connection. If it is, it will be indicated in the nameplate.
A motor with six leads shall be connected as follows:
IMPORTANT:
If the motor was requested with a special connection, do not connect
the motor as described above. For further information and/or technical
support, please contact your local SIEMENS sales office.
The motor might be supplied with an internal device protecting the
windings against overheating and/or overload. The type of the protection
device is specified in the nameplate. A RTD (Resistance Temperature
Detector) is placed on or inside the windings to record its temperature.
Leads of this device must be connected to another device capable of
interpreting the RTD signal to shut down the electrical supply in case of
overheating.
Overload protection devices act directly on the power circuit. They
use bimetallic materials which deform when a high and constant current
passes through them. E.g: The KLIXON's.
CAUTION:
element, it must have: an adequate power supply, overload protection, and
switching devices that ensure that the heating element ONLY OPERATES
WHEN THE MOTOR IS NOT ENERGIZED
CAUTION:
connection instructions from the tachometer manufacturer shall be
addressed before starting the motor for the first time.
Unrestricted
Some motors can be manufactured with six leads, in three
1. Leads marked with the same number must
2. Three pairs will be obtained. Each one shall
If the motor is equipped with an electrical heating
If the motor is equipped with tachometer, safety and
be connected to each other 1-1, 2-2 & 3-3.
be connected to a different phase of the
electrical supply.
.
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