Kamstrup MULTICAL 602, Техническое описание, Страница: 86 / 130

MULTICAL® 602
86 Kamstrup A/S ∙ Technical Description ∙ 5512 ‐ 931_N1_GB_11.2016
9.9 Back-up of data during power down
An early warning circuit and corresponding software is added, securing safety back-up of all main registers during
power down. In fact, this will function as the hourly data back-up, but also during power down. This will ensure that
the meter always starts up with the same display values as before the power break.
This will be effective for both 24V and 230V power break and also when the top part of MULTICAL
®
602 is removed
from the base, or in case of a battery failure.
The battery has been constructed to maintain a constanct voltage level of 3.6 VDC ±0,1 V throughout its entire
life-time. Shortly before the battery’s energy is used up completely, the voltage falls. When the battery reaches
3.1 V the meter performs a safety back-up. When the voltage is further reduced, ”bAt LO” is displayed to indicate
that the battery voltage of the meter is too low to carry out measurements. At 2.1 V info code = 1 is logged in the
info event logger with time and date, to make it possible to see when the battery’s energy has been completely
used up.
9.10 Danish regulations for connection of mains operated meters
Installation to electric mains operated equipment for consumption registration ( www.sik.dk , safety notification
electric services no. 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-isolated, it is not necessary to run
the protective conductor all the way 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 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, either by separators, or it must appear from the
installation instructions that the secondary circuit can be disconnected at the transformer’s terminals
General information
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 notification as well as connection and
disconnection of the equipment outside the panel is carried out by an authorized electrician. These tasks can also
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.