Lufft CHM 15k, User Manual

Page: 19 / 73

Operating Manual CHM 15k R13 / 07-2019
Installation 19
6.2 Electrical installation
NOTICE
Incorrect installation may result in damage to the equipment.

The electrical connection of the CHM 15k may only be carried out by a qualified electrician of
G. Lufft GmbH or another qualified electrician.
Failure to comply will result in the loss of warranty and warranty claims.

The operator must meet all the requirements for connecting the CHM 15k ceilometer in
accordance with EN 61010-1, e. g. installation of a connection box
Figure 10 shows a schematic sketch of the electrical installation of the CHM 15k. The power supply (1)
to the device must be connected via an external mains switch (2) which needs to be easily accessible to
cut the power to the device when required.
It must be marked as belonging to the CHM 15k and have a
pre-fuse according to cable cross-
section ≥ 6 A, B or C. The connection box should be installed at a
distance of < 3 m. An external lightning conductor (5) must be installed to protect the device from direct
lightning strikes. All connections to the device must be made according to the respective country-specific
regulations.
Figure 10 Schematic sketch of the electrical installation.
1 Power supply
2 Mains switch
3 Data connection
4 PC for remote access (via LAN, DSL, data connection can be a remote place)
5 Lightning conductor
WARNING
Touching live parts may result in electric shock, which will cause serious or fatal
injury.

Switch off the external circuit breaker before starting the installation and
secure against reconnection.
The electrical connections to the CHM15k are specified in more detail in Figure 11. Connect the mains
and data cables as shown in this figure. It is recommended to include external overvoltage protection in
all connections to the device to prevent damage to the connection box. Internal lightning protection is
provided in the device. The CHM 15k is connected via the following supplied cables: