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Ceiec Electric Technology
4.4 Logging
4.4.1 Peak Demand Log
The PMC-630E stores the peak demand data of
This Month
and
Last Month
with timestamp for Ia, Ib,
Ic, ∑kW, ∑ kvar, and ∑kVA. All of the peak demand data can be accessed through front panel LCD as
well as communications.
The
Self-Read Time
allows the user to specify the time and day of the month for the Peak Demand
Self-Read operation. At the specified time in each month, the Peak Demand register of
This Month
is transferred to the Peak Demand register of
Last Month
and then zeroed. The
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: Self-Read Time = Day * 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 15
th
day of each month.
The peak demand data of This Month can be reset manually through the front panel or via
communications.
The PMC-630E provides the following Peak Demand parameters:
Peak Demand of This Month
Peak Demand of Last Month
∑kW Peak Demand of This Month
∑kW Peak Demand of Last Month
∑kvar Peak Demand of This Month
∑kvar Peak Demand of Last Month
∑kVA Peak Demand of This Month
∑kVA Peak Demand of Last Month
Ia Peak Demand of This Month
Ia Peak Demand of Last Month
Ib Peak Demand of This Month
Ib Peak Demand of Last Month
Ic Peak Demand of This Month
Ic Peak Demand of Last Month
Table 4-5 Peak Demand Measurements
4.4.2 Max/Min Log
The PMC-630E records the minimum and maximum data of
This Month
and
Last Month
with
timestamp for VLN, VLL, I, ∑kW, ∑kvar, ∑kVA, ∑P.F., frequency, THD, K-Factor, and Unbalance. The
Max/Min data is stored in the device’s non-volatile memory and will not suffer any loss in the event of
power failure. All maximum and minimum data can be accessed through communications.
The
Self-Read Time
allows the user to specify the time and day of the month for the Max/Min
Self-Read operation. At the specified time in each month, the Max/Min registers of
This Month
are
transferred to the Max/Min registers of
Last Month
and then reset. The
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: Self-Read Time = Day * 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 15
th
day of each month.
