BERTHOLD TECHNOLOGIES LB 480, Руководство пользователя, Страница: 87 / 450

SENSseries LB 480 Level measurement
BERTHOLD TECHNOLOGIES GmbH & Co. KG
1 – 87
Volume 1 6 Electrical Installation
1
6
Electrical Installation
The electrical installation may be carried out only by a qualified
electrician.
Electrical hazards
Risk of fatal injury due to electric shock!
Open the housing only to perform installation, maintenance and
repair work.
When the housing is open, you may come into contact with live
parts if the power supply is connected. During installation and
maintenance work on the hardware of the detector you have to
switch off the measuring system, possibly connected relay con-
tacts, and all the inputs and outputs in order to avoid contact with
live parts.
Never modify the installation without having thoroughly read this
User’s Manual.
Cable glands, adapters and
dummy plugs
The screwed fittings must be suitable for the intended use (ATEX or
FM/CSA).
If the detector is not used in explosion hazardous areas, the
screwed fittings, adapters and dummy plugs have to be tested in
accordance with at least one of the following guidelines or stan-
dards:
– EN50262
– UL1565
– C22.2 No. 0.17.92
– ATEX
At ambient temperatures of -20 to +40° C, only metallic cable
glands and metal adapters may be used to comply with the protec-
tion class IP 65. The material properties of the cable glands, adapt-
ers and dummy plugs used must be suitable for the ambient condi-
tions existing at the measuring location.
At ambient temperatures above 40° C and below -20° C, only the
cable glands tested and approved by Berthold may be used.
The tightening torques for the cable glands supplied by BERTHOLD
TECHNOLOGIES are listed on
page 1-47 .
Please note that only one adapter per cable entry may be used. It
is not permitted to screw together several adapters.
The total length of the cable glands, including any adapter must not
exceed 10 cm.