Transport, installation and assembly
3.12 Connecting the anti-condensation heating and auxiliary circuits
A5E01083943A AB
56 Siemens AG Operating Instructions 2.02 1FW4
3.12 Connecting the anti-condensation heating and auxiliary circuits
Anti-condensation heating
NOTICE
Anti-condensation heating only if the motor is shut down
The anti-condensation heating is only allowed to be operated when the motor is off. For this
purpose, an appropriate interlocking circuit with the main switch of the machine must be
installed when erecting the electrical system.
The anti-condensation heating can only be switched on approximately 1 hour after
switching off the motor. This prevents damage to the winding insulation.
Auxiliary circuits
The type designations of the mounted auxiliary terminal boxes, their arrangement, and the
relevant connection terminals are documented in the "Technical data" section. The
information required to connect anti-condensation heating and the auxiliary circuits is
provided in the connection diagram, located on the inside of the terminal box cover, and in
the "Technical data" section. The terminals are suitable for conductor cross-sections up to 4
mm
2
. When choosing the connecting cables, take into account the rated current and the
plant-specific conditions (e.g., ambient temperature, routing type, etc., to IEC/EN 60204-1).
Cable entry and routing
For feeding in the connecting cables, a two-part cable inlet support with rubber seals is
screwed onto the terminal box as standard. Ensure that the IP55 degree of protection is met.
Internal equipotential bonding
The equipotential bonding between the protective conductor terminals in the respective
terminal box housing and the motor housing is established via a fastening screw of each
terminal box housing. The contact point underneath the bolt head is bare metal and
protected against corrosion.
Final checks
Before closing any of the terminal boxes, please check that
● the cables are connected in accordance with the terminal diagram inside the terminal box
cover.
● the inside of the terminal box is clean and free of any cable pieces.
● the cable glands are firmly tightened, and are suitable regarding the degree of protection,
type of cable routing, permissible cable diameter, etc., and have been mounted in full
compliance with the specifications and regulations.
● the connecting cables are laid in an open arrangement, and the cable insulation cannot
be damaged.
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