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4.3
Connecting the meter
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5.
Drill the three holes for the fixing screws.
6.
Unscrew the meter terminal cover.
7.
Fit the meter with the three fixing screws on the mounting surface
provided.
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
interrupted, i.e. the system switched off.
Dangerous voltage on current transformers
The current transformer secondary circuits must not be opened when
current 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 to
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
interrupted, i.e. the system switched off.
Connecting conductor cross-section
For ZxD400xT meters with a maximum current of 20 A connecting
conductors of 4 to 6 mm² cross-section are recommended.
If smaller conductors are used in connection with lower maximum current at
the metering point, the cross-section must be chosen corresponding to the
protection fuse and maximum current in the installation according to the
technical rules.
D000062026 en a – E650 Series 4 – ZMD400AT/CT, ZFD400AT/CT – User Manual
Installation and uninstallation
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