Landis+Gyr E650 Series User Manual page 7

Description of Unit
D000030110 d – E650 Series 3 (ZMD400AT/CT, ZFD400AT/CT) – User Manual

Tariff control
– External
– via control inputs (ZxD400xT21 and ZxD400xT41)
– via communication interfaces using formatted commands
– Internal
– by integral time switch (ZxD400xT24 and ZxD400xT44)
– by event signals based on monitored values, such as voltage,
current, demand etc.

Display of data on a liquid crystal display (LCD)

Active and reactive power per phase and true RMS values of voltages
and currents by means of digital signal processing (DSP) chips

Accuracy: Compliance with IEC class 1 or 0.5 S and with MID accu-
racy class B or C for active energy consumption (ZxD400xT) and IEC
class 1 for reactive energy (ZxD400CT).
Exception: ZxD402CT – IEC class 0.2S for active energy and IEC
class 0.5 for reactive energy.

Flexible measuring system through parameterisation (definition of
different variables by software)

Correct measurement even with failure of individual phases or when
used in two- or single-phase networks

Wide range of measurement from starting current to maximum current

Optical interface according to IEC 62056-21 and dlms
– for direct readout of meter data
– for service functions of the meter, extension board and communica-
tion unit (e.g. parameterisation)

Inputs for recording fixed valency pulses (communication unit)

Output contacts (solid-state relays) for fixed valency pulses, control
signals and status messages

Installation aids
– Indication of phase voltages, phase angles, rotating field and
direction of energy

Storage of event information, e.g. voltage failures, exceeding of thres-
holds or error messages. Event information can be read out via the
available interfaces. Important events can be communicated to the
energy supply company as operational messages (sending of SMS
messages, control of an arrow in the display, drive for an output con-
tact, etc.).

Interfaces such as CS, RS232, RS485, modem, etc. for remote trans-
mission of data (communication unit)

Auxiliary power supply for communication with the meter if no measur-
ing voltage is present
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