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Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
5
Equipotential bonding
Electrical Installation
Only use connection glands with screw heads that fit into the existing counterbore.
The following table shows the sizes of the flat bottom counter sinking with the corre-
sponding screw sizes:
All cable entries that are not required must be sealed off with a closing plug after com-
pletion of the installation in order to maintain the degree of protection. A closing plug
may only be replaced with another explosion-proof closing plug.
5.5
Equipotential bonding
In accordance with EN 60079-14 and IEC 61241-14, it might be necessary to establish
a connection to an equipotential bonding system. Observe the chapter "Electrical Instal-
lation" / "Improving the grounding (EMC)".
5.6
Wiring notes
Adhere to the safety notes during installation.
5.6.1
Protecting the motor protection devices against interference
Adhere to the following points to protect SEW motor protection devices (TF temperature
sensors) against interference:
• You may route separately shielded supply cables together with switched-mode
power lines in one cable.
• Do not route unshielded supply cables together with switched-mode power lines in
one cable.
Counter sinking in mm
Screw fitting
19
M12
24
M16
30
M20
35
M25
45
M32
56
M40
64
M50
75
M63