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Installation and uninstallation
4
Installation and uninstallation
4.1
Basic information for connecting the meter
4.1.1
Connection to low voltage with current transformers
D000062026 en a – E650 Series 4 – ZMD400AT/CT, ZFD400AT/CT – User Manual
This section describes the installation and connection of meters for
transformer connection. In addition, the necessary steps for checking the
connections, commissioning of the meter and the final functional check are
described as well as the uninstallation.
Dangerous voltage
Dangers can arise from live electrical installations to which the meters are
connected. Touching live parts is dangerous to life. All safety information
should therefore be strictly observed without fail.
It is recommended to use the following circuits whenever possible for
connecting the meter to the various voltage levels.
Terminal layout
In the following illustrations the terminal layout is shown according to DIN.
For the version with symmetrical terminal layout, which is optionally
available for ZMD400 meters for three-phase four-wire networks, the
different terminal numbers according to the connection diagram must be
observed.
Restriction for meters fitted with or intended to be fitted with pins, pin
adapters and cables
Meters fitted with or intended to be fitted with pins, pin adapters and cables
must have appropriately rated service fuse(s) in accordance with the
maximum current rating of the pins, pin adapters and cables deployed. In
such installation, the maximum rating stated on the meter faceplate is not
applicable and must be de-rated to that of the pins, pin adapters and cables
deployed.
Figure 46. Connection to low voltage with current transformers
47/96
© Landis+Gyr
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