KROHNE OPTITEMP TCA Ex EN - Manual (Page 28)

4
ELECTRICAL CONNECTIONS
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OPTITEMP TRA/TCA
www.krohne.com 10/2010 - 4001087001 - Ex AD OPTITEMP TRA/TCA R02 en
4.4 Grounding and equipotential bonding
The manufacturer's measuring insert connections withstand a test voltage of 500 VAC to earth.
DANGER!
In order to prevent injury and material damage, always observe the following points regarding
grounding and equipotential bonding:
• Always include the thermometer and its measuring insert as per EN 60079-14 in the
equipotential bonding of the installation site (when installed correctly, the fixing screws
guarantee this).
• If the thermometer is not connected to a grounded metal pipe system or a container through
the process connection, you must include it in the equipotential bonding of the explosive area.
• The connection for equipotential bonding is via the PA terminals or the process connection.
• If there is a cable shield you must ground it according to EN 60079-14. A terminal in the
connection head means that the cable shield can be grounded by the shortest route.
.book Page 28 Friday, November 19, 2010 2:23 PM