TECHNICAL DESCRIPTION MULTICAL
®
401
5512-091 GB/02.2008/Rev. J1
45
10.2 Supply module 230 VAC
This print module is galvanically separated from the mains supply and is suitable for direct mains installation.
The module includes a double-chamber safety transformer which fulfils the requirements of double-insulation.
The power consumption is less than 1 VA/1 W.
Figure 31
National installation requirements must be met. The 230 VAC module must only be connected by authorised
personnel. In Denmark ”Elråd nr. 5/98” or later edition must be followed.
Changes from battery to mains supply requires a re-programming, as info 128 will still be active for the mains
supplied meter.
10.3 Supply module 24 VAC
The energy meter includes a print module which reduces the input voltage to approx. 3.6 VDC. The module has a
built-in transient protection, but includes no galvanic separation between input and output voltages. The module
is specially suited for installation together with a galvanically separated transformer, e.g. type 66-99-403, which
can be installed in the switch cabinet. When the transformer is used, the total power consumption of the meter
will be less than 4 VA/1.5 W for the entire meter.
Figure 32
10.4 Changing the supply unit
The supply unit for MULTICAL
®
401 can be changed from mains supply to battery or vice versa, concurrently with
changed needs at the utility. Thus, mains supplied meters can be exchanged into battery meters with advantage
in connection with buildings under construction, as the mains supply may be unstable or may even lack in
periods.
In connection with changes it is, however, important to note that the information code 128 (
Battery must be
changed. The code is set 12 years after resetting the hour counter)
is only active at type number 66-Wx-2x-xxx.
Use METERTOOL (see section 14) for reprogramming.
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