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Installation and De-Installation
4.2
Mounting the Meter
D000030110 d – E650 Series 3 (ZMD400AT/CT, ZFD400AT/CT) – User Manual
Dangerous voltage on conductors
The connecting conductors at the point of installation must be voltage-free
for installation of the meter. Contact with live components is dangerous to
life. The relevant supply fuses should therefore be removed and kept in a
safe place until finishing work, so that they cannot be re-inserted by other
persons unnoticed.
The jumpers in the voltage connections must also be opened at the test
terminal block (e.g. TVS14). For this purpose, release the screw of the
relevant jumper with an insulated screwdriver, move the jumper away from
the terminal on the meter side and then re-tighten the screw.
If no test terminal block is available, the primary voltage must be inter-
rupted, i.e. the system switched off.
Dangerous voltage on current transformers
The current transformer secondary circuits must not be opened when cur-
rent is flowing in the primary. This would produce a dangerous voltage at
the terminals of several thousand volts and the insulation of the transformer
would be destroyed.
To install the meter, short-circuit the secondary of the current transformer at
the test terminal block (e.g. TVS14). For this purpose, release the screw of
the relevant short-circuiting jumper with an insulated screwdriver, move the
jumper away over the terminals on the meter side and then re-tighten the
screw. The circuit on the meter side can then be opened without danger.
If no test terminal block is available, the primary voltage must be inter-
rupted, i.e. the system switched off.
When you have identified the correct meter position for mounting the meter,
it should be mounted as follows on the meter board or similar device pro-
vided for this purpose:
1.
Determine the desired form of fixing (open/covered meter mounting or
extended suspension hook for 230 mm suspension triangle height). If
holes for a suspension triangle height of 230 mm are already present,
use the optional extended suspension hook depicted below. This
hook can be ordered with the part number 74 109 0072 0 (minimum
order quantity 50) from:
Landis+Gyr AG
Service & Repair
Feldstrasse 1
CH-6301 Zug
Switzerland
Fig. 4.6
Extended suspension hook
47/93
© Landis+Gyr AG
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