Mx37y_Technical_Description_ENG_v2.00.doc
8
─ Single- and three-phase electronic meters with built-in DLC
modem, GSM/GPRS modem or RS485 comm. interface
- “Emergency Credit Limit” defines the credit value
which is available after the value of “Available Credit
Register” reaches zero and the customer selects the
emergency credit.
- “Emergency Credit Threshold” defines the positive
value of “Available Credit Register” at which the
meter begins to notify the customer that the credit will
expire. When the value of “Available Credit Register”
falls below the value of “Emergency Credit
Threshold”, the meter starts notification.
Emergency credit must always be selected by the
customer otherwise the meter disconnects the
customer from the grid when “Available Credit
Register” reaches zero.
Consumption-based tariff charging:
Consumption-based tariff charging is bound to energy
consumption register via “Energy Register
Reference” object which contains the COSEM logical
name of energy consumption register.
In each accounting period the meter calculates the
increment of energy consumption from the previous
accounting period. The increment is then multiplied
by the appropriate tariff charge rate according to
meter tariff definition. The calculated charge advance
based on consumption is finally charged from the
customer’s credit.
Time-based auxiliary charging:
This charging function is used for charges that are
fixed over predefined period of time defined as one
month. The accounting period of time-based auxiliary
charges is one minute. This means that the meter
calculates the minute value of auxiliary charge by
dividing the auxiliary charge for one month with the
number of minutes per month. The minute values are
then charged from the customer’s credit every
minute. When the meter is powered down, the
auxiliary charge is done after power-up, including
charges for the whole period of time when the meter
was powered-off.
Fig. 2: MT372 meter with ZO3 plug-in switching device
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