Emerson Bettis SCE300 Installation, Operation And Maintenance Manual page 29

Installation and Maintenance Instructions
MAN-02-04-99-0712-EN Rev. 1
NOTICE
In case the screws of the cover, of the terminal compartment and of the OM3 must be
replaced, SS Aisi 316 Class A4 grade 80 screw must be used with minimum yield strength
600 N/mm², the screw size is M6 X 25 mm. Other screws used for the assembly of the other
various parts of the explosion proof enclosure shall be a SS AISI 316 Class A4 Grade 70,
with minimum yield strength of 450 N/mm
compartment cover and the OM3 are reassembled, make sure to tight all the screws with
5 Nm torque.
In order to properly connect the cables, remove the cable entry plugs and make all the
necessary connections. To guarantee the a proper weather-proof fit, degree IP66/68 must
be ensured: screw the cable glands tightly and coat them with a thread sealant. The use of
a thread sealant is necessary in explosion-proof applications.
If some parts of the cable glands have been removed while working on the cable entries,
put them back into place in order to avoid losing the dismantled parts. For unused entries:
•
•
WARNING
Once all power cable connections have been made to the terminal block, position the power
terminal protection to prevent accidental contact while wiring the signal terminals.
Figure 13
Installation
For explosion-proof construction: unused entries must be plugged with metal
explosion-proof plugs and coated with a thread sealant
For weather-proof construction: replace the standard plastic protection plugs
supplied with the actuator with suitable plugs to guarantee the requested degree
of protection
Overview of the cable entry conduits
. Every time the main cover, the terminal
2
Section 4: Installation
February 2020
power terminal
protection
25