Siemens Simotics SD 1LE7, Руководство по эксплуатации

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1LE7
A5E36065207, 04/2018
21
Table 6-5 Minimum cross-sectional area of grounding conductor
Minimum cross-section of the phase conductor for installa-
tion
S
[mm²]
Minimum cross-section of the associated grounding connec-
tion
[mm²]
S ≤ 25 S
25 < S ≤ 50 25
S > 50 0.5 S
Internal ground terminal
When making connections, ensure the following:
● Ensure that the connecting surface is bare and is protected against corrosion using a suitable substance, e.g. acid-free
Vaseline.
● Arrange the flat washer and spring washer under the bolt head.
● Locate the cable lug under the clamping bracket.
● Use the terminals designated for the grounding conductor in the terminal box.
● Observe the tightening torque for the locking screw.
External ground terminal
When making connections, ensure the following:
● Ensure that the connecting surface is bare and is protected against corrosion using a suitable substance, e.g. acid-free
Vaseline.
● Position the cable lug between the contact bracket and the grounding bracket; do not remove the contact bracket
pressed into the enclosure!
● Arrange the flat washer and spring washer under the bolt head.
● Use the marked connection location for the grounding conductor on the stator housing.
● Observe the tightening torque for the locking screw.
6.5 Final checks
Before closing the terminal box/terminal base of the machine enclosure, check the following:
● Establish the electrical connections in the terminal box in accordance with the information in this documentation.
● Maintain the air clearances between non-insulated parts as described in Chapter Minimum air clearances. (Page 19)
● Avoid protruding wire ends.
● In order not to damage the cable insulation, freely arrange the connecting cables.
● Connect the machine corresponding to the specified direction of rotation.
● Keep the inside of the terminal box clean and free from trimmed-off ends of wire.
● Ensure that all seals and sealing surfaces are undamaged and clean.
● Correctly and professionally close unused openings in the terminal boxes. Observe the information in this
documentation.
● Observe the information on torques in this documentation.