Device Description; Field Of Application - Landis+Gyr E650 Series 4 User Manual

Device description

2 Device description
2.1

Field of application

D000062026 en a – E650 Series 4 – ZMD400AT/CT, ZFD400AT/CT – User Manual
This section provides you with a brief overview of the design and function of
the ZxD400xT meters.
ZxD400xT meters can be used for transformer connection at all three
voltage levels, namely on low, medium and high voltage. They are primarily
used by medium and large consumers and in the field of energy generation
and exchange.
The ZMD400xT meter is especially suitable for applications at the low
voltage level, while the ZFD400xT meter is generally used more at the
medium and high voltage levels.
ZxD400xT meters have a comprehensive tariff structure. This extends from
seasonal tariffs to multiple energy and demand tariff rates.
The ZMD400xT and ZFD400xT meters are designed for connection to
current transformers with 5 A or 1 A rated current or as a special version for
both applications (5//1).
The ZMD400CT and ZFD400CT combimeters record active and reactive
energy consumption, the ZMD400AT and ZFD400AT active energy meters
only the active energy in three-phase four-wire or three-phase three-wire
networks (low, medium and high voltage) and from this determine the
required electrical measured quantities. For this purpose they are
connected to the measuring point via current transformers and possibly
also voltage transformers:

Low voltage: ZMD400xT with current transformers

Medium voltage: ZFD400xT (sometimes also ZMD400xT) with current
and voltage transformers

High voltage: ZMD400xT (sometimes also ZFD400xT) with current and
voltage transformers
The data determined are displayed (LCD) and are also available at the
optical interface for data acquisition, with an appropriate communication
unit also as required via CS, RS232, RS485, modem, etc.
When equipped with transmitting contacts, the meters can also be used as
transmitting meters for telemetering. The tariff rates can be controlled
internally or externally.
With a communication unit, the meters can also be used for recording
counter pulses for other physical media (e.g. water or gas volumes).
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