Landis+Gyr ZMQ202, User Manual

Page: 44 / 88

Gyr H 71 0200 0215 f en - ZMQ202 / ZFQ202 - User Manual
44/88 Installation / De-installation
Danger
Missing transformer earthing
Voltage transformers in medium and high voltage systems that are not
earthed on the secondary may reach dangerously high voltage values on
the secondary.
Voltage transformers are usually earthed on the secondary. If the voltage
transformer is not earthed, severe personal injury or death can result if
contact is made with the meter and the meter will be damaged beyond
repair.
If the voltage transformers are not earthed, special precautions must be
taken when working at the meter. Installation and de-installation of the
meter must only be performed by qualified meter installers, with strict
adherence to the utility's safety regulations.
Connect Current and Voltage Connectors
1. Shorten the current and voltage connecting wires to the required
length and then strip them to fit the connectors.
2. Insert the current and voltage connecting wires to the terminal
numbers as shown in the connection diagram.
3. Tighten (torque up to 1.7 Nm) the terminal screws using the torque
screwdriver size 2.
Connect Supply Inputs and Outputs and Transmitting Contacts
4. Shorten the connecting wires of the supply inputs and outputs to the
required length and strip them for approx. 4 mm (wires and strands up
to 2.5 mm
2
can be connected).
5. If stranded wire is used, it is recommended to fit it with ferrules for
connection.
6. Connect the connecting wires of the supply inputs and outputs as
shown on the terminal connection diagram to the spring clamp
connectors as follows:
Insert a size 1 screwdriver, turning it slightly upwards, in
the upper opening.
ap
pr
ox
. 4
m
m
Place the stripped connecting wire in the lower opening
and hold it there securely.
Withdraw the screwdriver. The connecting wire is now
firmly fixed.