WirelessHART Fieldgate SWG70, Руководство по эксплуатации

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5 Electrical Installation WirelessHART Fieldgate SWG70
24 Hauser
5.5 Cable glands and housing cover
The degree of protection IP 65 (NEMA Type 4) cannot be achieved if the cables and cable glands
are not fitted correctly.
To ensure the IP degree of protection
• all screws of the housing / housing cover must have been tightened with the appropriate
torque,
• only cables of the appropriate size must be used in the cable glands,
• all cable glands must be tightened with the appropriate torque,
• all seals must be undamaged and fitted correctly,
• all empty cable glands must be sealed with appropriate plugs.
The tightening torques of cable glands depend on what type of cable is used and must therefore be
determined by the user. The cap nuts must be securely tightened. Tightening the cap nuts too tight
can have a negative effect on the protection class. The following figures can be taken as rough
guides.
The housing cover must be installed with a torque of 24.1 Nm.
Type of cable gland Approx. installation torque
Plastic 2.5 Nm
Nickel-plated brass 4.1 Nm
Stainless steel 4.1 Nm