MULTICAL® 803
148
Kamstrup A/S · Technical description · 5512-2360_A1_
GB
_02.2019
10.8
Data backup in case of interruption of supply
As a starting point, MULTICAL® 803 is always equipped with a backup battery, see paragraph 10.1, which ensures the
operation of the calculator and the internal clock in case of an interruption of the mains supply. If it is required to
replace the backup battery, the calculator will, during the replacement, maintain its clock for one hour so that the
replacement of the backup battery can take place without loss of time information. The calculator is also equipped
with functionality to store all current register meter counts if the supply is completely disconnected (both backup
battery and mains supply). When the supply is reestablished, the calculator continues counting from the value, which
was saved when the supply was interrupted.
10.9
Danish regulations for mains connection of meters
Installation of mains-connected equipment for registration of consumption.
(www.sik.dk, SIK message Electrical Installations 27/09, February 2009)
The consumption of energy and resources (electricity, heat, gas and water) of the individual consumer is to an
increasing extent registered by electronic meters and often, equipment for remote reading and remote control of
both electronic and non-electronic meters is used.
General regulations for carrying out installations must be observed. However, the following modifications are
permitted:
•
If meter or equipment for remote reading or remote control is double insulated, it is not necessary to extend
the protective conductor to the connection point. This also applies if the connection point is a plug socket,
provided that it is placed in a canning which is sealable or can be opened with key or tool only.
If meter or equipment used for remote reading and remote control is connected to a safety transformer mounted in
the panel and that is direct connected to the branch conductor, no on-off-switch or separate overcurrent protection
in either primary or secondary circuit is required, provided that the following conditions are fulfilled:
•
The safety transformer must either be inherently short-circuit-proof or fail-safe.
•
The conductor of the primary circuit must either be short-circuit-protected by the overcurrent protection of
the branch conductor or short-circuit safely run.
•
The conductor of the secondary circuit must have a cross section of at least 0.5 mm² and a current value
which exceeds the absolute maximum current deliverable by the transformer.
•
It must be possible to separate the secondary circuit, by separators, or it must appear from the installation
instructions that the secondary circuit can be disconnected at the transformer’s connection terminals.
In general
Work on the fixed installation, including any intervention in the group panel, must be carried out by an authorized
electrician.
It is not required that service work on equipment comprised by this message as well as connection and
disconnection of the equipment outside the panel is carried out by an authorized electrician. These tasks can be
carried out by persons or companies who professionally produce, repair or maintain equipment if only the person
carrying out the work has the necessary expert knowledge.