Device description
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– E650 Series 4 – ZMD400AT/CT, ZFD400AT/CT – User Manual
© Gyr
2.3
Characteristics
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)
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 and demand.
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 accuracy
class B or C for active energy consumption (ZxD400xT) and IEC class 1
S for reactive energy (ZxD400CT).
Exception
: ZxD402CT
– IEC class 0.2 S for active energy and IEC
class 0.5 S 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
communication 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
Output contacts (relays) for control and status messages
Input contact for alarm monitoring and sending SMS messages, if
suitable optional communication unit selected
Installation aids
– Indication of phase voltages, phase angles, rotating field and
direction of energy
