Landis+Gyr E650 Series User Manual page 11

Description of Unit
Signal utilisation
Tariff control
Data preparation for
billing
Memory
D000030110 d – E650 Series 3 (ZMD400AT/CT, ZFD400AT/CT) – User Manual
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 en-
ergy direction, if required in the combimeters ZxD400CT also assigned
to the 4 quadrants)

Reactive energy (only for combimeters ZxD400CT, sum and individual
phases, separated according to energy direction, assigned to the 4
quadrants)

Apparent energy (only for combimeters ZxD400CT, sum and individual
phases, separated according to energy direction)

Power factor cosφ (only for combimeters ZxD400CT, individual phases
and mean value)

Phase voltages

Phase currents and neutral current

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 exten-
sion 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 (combimeters ZxD400CT 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 also con-
tains the configuration and parameterisation data of the meter and secures
the billing data against loss due to voltage failures.
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© Landis+Gyr AG