5 Installation at Site
38 of 62
SRA
2334.810/03-EN
5.11 Electrical connection
DANGER
Electrical connection work by unqualified personnel
Risk of fatal injury due to electric shock!
▷
Always have the electrical connections installed by a trained and qualified
electrician.
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Observe regulations IEC 60364 and, for explosion-proof models, .
WARNING
Incorrect connection of ready-to-connect control units to the mains
Damage to the power supply network, short circuit!
▷
Observe the technical specifications of the local energy supply companies.
WARNING
Unsecured access opening
Danger of injury by falling!
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If work is interrupted or when the work has been completed, fit the fall
protection at the access opening and close the access opening with the tank
cover.
Lightning protection
▪
Electrical installations must be protected against overvoltage (compulsory since
14 December 2018) (see DIN VDE 0100-443 (IEC60364-4-44:2007/A1:2015,
modified) and DIN VDE 0100-534 (IEC 60364-5-53:2001/A2:2015, modified).
Whenever modifications are made to existing installations, retrofitting a surge
protective device (SPD) in accordance with VDE is mandatory.
▪
A maximum cable length of 10 metres should not be exceeded between the
surge protective device (usually type 1, internal lightning protection) installed at
the service entrance and the equipment to be protected. For longer cables,
additional surge protective devices (type 2) must be provided in the sub-
distribution board upstream of the equipment to be protected or directly in the
equipment itself.
▪
Sensor cables that cross the boundaries between lightning protection zones must
be additionally protected by suitable surge protective devices (e.g. when using a
4 - 20 mA immersion probe).
▪
Control units installed outdoors (e.g. in outdoor cabinets) should always be
equipped with Type 1 surge protective devices (lightning protection), as they will
not normally be protected by a suitable upstream service entrance SPD.
▪
The associated lightning protection concept must be provided by the operator or
by a suitable provider commissioned by the operator. Surge protective devices
can be offered for the control units on request.
