NZR – Ihr Partner für Energiemessung
Technische Änderung
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Technical details subjec
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Power supply modules
The power supply modules are connected by means of a plug-in connector to the main
board.
Main power supply modules
From the installation side, the main power 230V – 45/60 Hz is to be
protected with a 5A fuse. The power supply module 230 VAC, 24 VAC
or 12 - 24 VDC are equipped at the factory with a backup battery. With
the emergency power supply via the backup battery, the WZ FW 662
is operated in a mode to preserve the battery. The emergency power
over backup battery is laid out up to 6 months. The instrumentation characteristics
are ensured, however the communication options are not supported. The mains power
supply modules are provided ex-factory with a jumper. This Jumper permits an activating
or a deactivating of the backup battery. At the delivery of the WZ FW 662 the jumper is
always plugged - activated.
The electrical connection of main power supply modules
The electrical connection is to be done in accordance with valid standards, under consi-
deration of local safety regulations and by an authorized person. The electrical main is to
be made in such way that no hot parts (pipes etc. over 80°C) can be touched (danger with
damaged isolation). The electrical connection may not come into contact with water.
Backup battery for date and time
The calibration and measuring relevant integrator upper part is equipped with a button
cell. This button cell battery serves as power supply for the date and time function as
well as for the LCD display, if the integrator upper part is removed from the lower part.
On the LCD display appears in this case the cumulated running time of the battery in
minutes. The backup function of the button cell battery is laid out up to 3 months.
Note: In case of missing voltage supply module in the lower part of integrator the button
cell battery in the upper part of the integrator is emptied prematurely.
When storing the WZ FW 662 it is to be paid attention that the back-up battery is not
activated. On request a protective film can be installed at the factory, in order to protect
the battery from an early discharge.
