Siemens SIMOTICS M-1PH8 Configuration Manual

Internal equipotential bonding
The potential equalization between the grounding terminal in the terminal box enclosure and
the motor enclosure is established via the terminal box 󹪝xing screws. The contact locations
underneath the screw/bolt heads are bare and are protected against corrosion.
The standard terminal box cover 󹪝xing screws provide adequate equipotential bonding
between the terminal box cover and terminal box enclosure.
Note
Higher number of grounding terminals in the terminal box for shaft height 280 (option
Q00)
For large transmission powers, symmetrical power cables with a grounding conductor split into
3 are used in some cases. To be able to connect this high number of grounding conductors in the
terminal box, with option Q00, for a shaft height 280, a grounding bar with a higher number of
terminals can also be mounted, see Chapter "Increased number of grounding terminals in the
terminal box (Page200)".
Shaft height


SH
Terminal box


Type
Quantity
Connecting terminals
(Grounding)
Standard
Quantity
Terminals (grounding)
Option Q00
280 1XB7712-P... 4 x M16 12 x M6
Motor and connecting cables
• For the motor cables, use twisted or three-core cables with additional ground conductor.
Strip the insulation from the ends of the conductors so that the remaining insulation extends
up to the cable lug or terminal.
• Arrange the connecting cables loosely in the terminal box so that the protective conductor
has excess length and the insulation of the cable cores cannot be damaged. Ensure that the
connecting cables are strain relieved.
• Take special care that the required air clearances are actually maintained:
– Up to shaft height 160, as a minimum 4.5mm
– From shaft height 180, as a minimum 10mm
Checking/testing after connecting up
• The inside of the terminal box must be clean and free of any cable pieces.
• All of the terminal screws must be tight.
• The minimum air clearances must be strictly maintained.
• The cable entries must be reliably sealed.
Electrical connection
9.3System integration
1PH8 SIMOTICS M main motors
226 Con󹪝guration Manual, 12/2022, A5E51895839A

Siemens SIMOTICS M-1PH8 Specifications

General

Brand	Siemens
Model	SIMOTICS M-1PH8
Category	Engine
Language	English