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Electrical connection
6.2 Connecting
No cable entries or simple designs of sealing plug may be used on terminal boxes with the
"Ex e" type of protection.
An explosion may occur during operation. This can result in death, serious injury or material
damage.
● Use only cable entries that have been tested and certified in accordance with
● Use only sealing plugs that have been tested and certified in accordance with
Working on terminal boxes of the "Ex e" type of protection with undrilled cable entry plate
This can result in death, serious injury or material damage.
Ensure that the cable entry plate is still strong enough after drilling the threads.
6.2.2
Connecting the grounding conductor
The grounding conductor cross-section of the machine must be in full conformance with the
selection and installation specifications and to IEC/EN 60204-1.
Table 6-1
A terminal strip for grounding is fitted either on the stator frame or on the flanged endshield,
depending on the type of construction. The grounding point is marked.
The terminal strip is suitable for connecting stranded cables with cable lugs or connecting flat
straps. In addition, all machines have a PE terminal within the terminal box.
When connecting up the grounding conductor, ensure that the contact surface of the
connection is bare and protected against corrosion using a suitable agent, e.g. with acid-free
Vaseline.
6.2.3
Circuit diagram in the terminal box cover
Data on the connection and connecting the motor winding can be found in the circuit diagram
in the cover of the terminal box.
56
WARNING
IEC / EN 60079–7.
IEC / EN 60079–7 to close openings that are not to be used.
CAUTION
Determining the cross-section of the grounding conductor
External cable cross-section S
S ≤ 16 mm²
16 mm² < S ≤ 35 mm²
S > 35 mm²
Cross-section of the grounding conductor [mm²]
S
16 mm²
S/2
Operating Instructions 08/2016
LOHER CHEMSTAR 1PS2
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