Description Of Unit; Field Of Application; Characteristics - Landis+Gyr E650 Series User Manual

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Description of Unit

1.1

Field of Application

1.2

Characteristics

© Landis+Gyr AG
This chapter 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 volt-
age 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 volt-
age 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 cur-
rent 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 re-
quired 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 op-
tical 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 inter-
nally 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).
ZxD400xT meters have the following basic characteristics:

Recording of active, reactive and apparent energy in all four quadrants
(ZxD400CT) or recording of imported and exported active energy
(ZxD 400AT)

Tariff system with energy and demand tariff rates, stored values, load
profiles etc.

Extended functions such as monitoring functions, sliding maximum
demand, etc. (for ZxD400CT additionally power factor cosφ)
D000030110 d – E650 Series 3 (ZMD400AT/CT, ZFD400AT/CT) – User Manual
Description of Unit