MULTICAL® 403
Kamstrup A/S · Technical description · FILE100000166_B_EN-55121689_M1_07.2023
10.7 230 VAC high-power SMPS
This module is galvanically separated from the 230 VAC supply, the module is adjusted to direct connection to the
electricity network. The module is constructed as a Switch Mode Power Supply, which complies with the double
insulation requirements when the calculator top is mounted on the calculator base. When disconnecting the supply,
the module will only keep the meter supplied for a few seconds.
If connected to 230 VAC the whole installation must fulfil current national regulations. Connection/disconnection of
the module must be carried out by the meter installer. However, note that work on fixed installations, including any
intervention in the fuse box, must be carried out by an authorized electrician.
10.8 24 VAC/VDC high-power SMPS
This module is galvanically separated from the 24 VAC/VDC supply, the module is adjusted to industrial installations
and installations powered by a separate 230/24 V safety transformer, for instance mounted in a control panel. The
module is constructed as a Switch Mode Power Supply, which complies with the double insulation requirements
when the calculator top is mounted on the calculator base. When disconnecting the supply, the module will only
keep the meter supplied for a few seconds.
The whole installation must fulfil current national regulations. Connection/disconnection of the module can be
carried out by the meter installer, whereas installation of the 230/24 VAC safety transformer in a control panel as
well as other fixed installations must be carried out by an authorized electrician.
10.9 Power consumption of mains connected meter
The gained power of meters connected to 24 VAC/VDC or 230 VAC appears from the marking on the meter’s front.
The marking states an average maximum value for the meter’s gained power, and over a period the power will not
exceed the marking. For instance short periods with data communication require a short-term increase of the energy
consumption, whereas longer periods without data communication require less energy. The table shows examples of
accumulated yearly consumption for MULTICAL® 403 with various supply types. For battery supplied meters, see
paragraph 10.4 concerning battery lifetimes.
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