Installing The Meter - ABB A43 User Manual

Installation

2.3 Installing the Meter

Warning – Electrical equipment should only be installed, accessed, serviced
and maintained by qualified electrical personnel.
Working with high voltage is potentially lethal. Persons subjected to high voltage
may suffer cardiac arrest, burn injuries, or other severe injuries. To avoid such
injuries, make sure to disconnect the power supply before you start the installation.
Warning – For safety reasons it is recommended that the equipment is installed in a
way that makes it impossible to reach or touch the terminal blocks by accident.
The best way to make a safe installation is to install the unit in an enclosure. Further,
access to the equipment should be limited through use of lock and key, controlled by
qualified electrical personnel.
Warning – The meters must always be protected by fuses on the incoming side.
In order to allow for maintenance of transformer rated meters, it is recommended that
there should be a short circuiting device installed near the meter. Alternatively a CT with
short circuiting terminals is used to short circuiting the secondary current during
maintenance. The reason for short circuit the secondary current during maintenance is
that a very high voltage will be induced across the terminals if current is flowing through
the CT primary and any secondary terminal is disconnected. This high voltage can be
potentially lethal and can damage the CT or other equipment.
Cable type Cable type connected to the voltage/current terminals shall be solid or stranded copper
cable. When using stranded cable end ferrules can be used.
Follow the steps in the table below to install and verify the installation of the
Install the meter
meter:
Step
1
2
3
4
5
6
7
Verify the installation
2CMC48001M0201
Revision: C
Action
Switch off the mains power.
Place the meter on the DIN-rail and make sure it snaps onto it.
Strip the cable insulation to the length that is indicated on the meter.
Connect the cables according to the wiring diagram that is printed on the meter
and tighten the screws (3.0 Nm for direct connected meters and 1.5 Nm for
transformer connected meters).
Install the circuit protection. See table 2:1 below for the correct fuse.
If inputs/outputs are used, connect the cables according to the wiring diagram
that is printed on the meter and tighten the screws (0.25 Nm). Then connect to
an external power supply (max 240V).
If communication is used, connect the cables according to the wiring diagram
that is printed on the meter and tighten the screws (0.25 Nm).
19 A43/A44
User Manual