Siemens 1PH728, Руководство по эксплуатации

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Transport, assembly, and connection
3.3 Electrical connection
A5E00177602A AD
32
Siemens AG Operating Instructions 2.02 1PH728
Note
We recommend using shielded cables with shielding that is conductively connected to a
large area of the metal terminal box of the motor (with an EMC cable gland made of metal).
NOTICE
Unused threads must be sealed with a metallic screw plug.
Internal equipotential bonding
The equipotential bonding between the ground terminal in the terminal box housing and the
motor frame is established via the terminal box fixing bolts. The contact points underneath
the bolt heads are bare metal and are protected against corrosion.
The standard terminal box cover fixing bolts provide adequate equipotential bonding
between the terminal box cover and terminal box enclosure.
Note
Connecting points are provided on the enclosure or end shield to allow an outer PE
conductor or equipotential bonding conductor to be connected (see section entitled
"Connecting the ground conductor").
Final checks
Before closing the terminal box, please check that:
●
the electrical connections in the terminal box are tight and are in full compliance with the
specifications above.
● the required clearances in air of 10 mm are maintained.
● no wire ends are standing proud.
● The inside of the terminal box must be clean and free of any pieces of cable.
● all seals and sealing surfaces are not damaged.
● the connecting cables are laid in an open arrangement and the cable insulation cannot be
damaged.
● cable entries which are not used are sealed and the plugs are tightly screwed in (i.e. so
that they can only be removed using the suitable tools).
● the right cable glands are fitted with respect to the correct degree of protection, method of
laying, permissible cable diameter etc., as stated in the specifications.
Then close the terminal box.
Note
Tightening torque for the fixing screws on the lid: 22 Nm