Landis+Gyr E650 Series 4 User Manual page 16

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Signal utilisation
Tariff control
Data preparation for
billing
Memory
Power supply
© Landis+Gyr
For signal utilisation in the various registers, the microprocessor scans the
measured quantities every second to determine the following values:

Active energy (sum and individual phases, separated according to
energy direction, if required in the ZxD400CT combimeters also
assigned to the 4 quadrants)

Reactive energy (only for ZxD400CT combimeters, sum and individual
phases, separated according to energy direction, assigned to the 4
quadrants)

Apparent energy (only for ZxD400CT combimeters, sum and individual
phases, separated according to energy direction)

Power factor cosφ (only for ZxD400CT combimeters, individual phases
and mean value)

Phase voltages

Phase currents and neutral current

Active and reactive power

Direction of rotating field

Total harmonic distortions of active energy, voltage and current

Energy losses (line losses and transformer losses)
Tariff control is performed:

Externally via control inputs (3 fixed, plus up to 4 others on the
extension board)

Externally via communication interfaces using formatted commands

Internally by time switch and calendar clock

By event signals based on threshold values of the monitoring functions
The following registers are available for evaluation of the individual
measured values:

32 for energy rates

27 for total energy

10 for running mean demand values

24 for demand rates

2 for power factors cosφ (ZxD400CT combimeters only)

up to 41 diagnostic registers

others for values of voltage and current, network frequency and phase
angles
A non-volatile flash memory serves to record data profiles and contains the
configuration and parameterisation data of the meter and secures the
billing data against loss due to voltage failures.
The supply voltages for the meter electronics are obtained from the three-
phase network, whereby the phase voltage can vary over the entire voltage
D000062026 en a – E650 Series 4 – ZMD400AT/CT, ZFD400AT/CT – User Manual
Device description