Landis+Gyr ZFQ202, User Manual

Page: 11 / 88

H 71 0200 0215 f en - ZMQ202 / ZFQ202 - User Manual Gyr
Safety 11/88
Danger
Dangerous voltage on transformers
Dangerous voltage is produced by the current transformers when the
secondary circuit is broken while current is flowing in the primary.
Contact with the transformers when under voltage will result in severe
personal injury or death. The high voltage produced will destroy the
transformers.
The current transformer secondary circuit must be short-circuited before
de-installing the meter.
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.
Danger
Galvanic isolation
The measuring circuits and auxiliary circuits (additional power supply, tariff
control input, synchronisation input, transmitting contacts, communication
interfaces) must be galvanically isolated.
Danger
Voltage paths must be fused
When installing the meter, all voltage paths (measurement voltage and all
auxiliary circuits such as the additional power supply and the tariff control
voltage) must be fused by max. 6A delay fuses.
Warning
Damage of dust, water, incorrect cleaning and handling
Damage to the meter could occur if the meter is subjected to running
water or even high-pressure devices, e.g. for cleaning purposes. The meter
may be cleaned with a damp cloth.