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where
V1, V2 are the Positive and Negative Sequence Components for Voltage, respectively.
and
I1, I2 are the Positive and Negative Sequence Components for Current, respectively.
4.4 Logging
4.4.1 Max./Min. Log
The PMC-340 records the Max. Log and Min. Log of This Month (Since Last Reset) and Last Month
(Before Last Reset) with timestamp for 44 parameters. Each log includes the relevant parameter
value and its timestamp. The recorded data is stored in non-volatile memory and will not suffer any
loss in the event of a power failure. The PMC-340’s Max./Min. Log records the following parameters:
Table 4-7 Max./Min. Measurements
The same Self-Read Time for the Peak Demand Log is used to specify the time and day of the month
for the Max./Min. Self-Read operation. Please refer to Section 4.5 for a complete description of the
Self-Read Time and its operation.
The Max./Min. Log of This Month can be reset manually from the front panel or via communications.
4.4.2 Monthly Energy Log
The PMC-340 stores monthly energy data for the present month and the last 12 months. The
Monthly Energy Log Self-read Time setup parameter allows the user to specify the time and day of
the month for the Recorder’s Self-read operation via communications. The Monthly Energy Logs are
stored in the meter’s non-volatile memory and will not suffer any loss in the event of power failure,
and they are stored on a first-in-first-out basis where the newest log will overwrite the oldest.
The Monthly Energy Log Self-Read Time supports two options:
A zero value means that the Self-Read will take place at 00:00 of the first day of each month.
A non-zero value means that the Self-Read will take place at a specific time and day based on the
formula: Energy Self-Read Time = Day x 100 + Hour where 0 ≤ Hour ≤ 23 and 1 ≤ Day ≤ 28. For
example, the value 1512 means that the Self-Read will take place at 12:00pm on the 15th day of
each month.
The Monthly Energy Logs can be reset manually through the front panel or via communications.
The PMC-330 provides the following energy data for the present month and the last 12 months:
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