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Power Monitor, PD 3260
Manual
5
Power Monitor Channel (channel A).
The power monitor channel has current and voltage inputs for monitoring a 50Hz or 60 Hz power
line. The channel can be used as an energy meter. It measures the energy of one three-phase
system, or between one and three single-phase systems. Another application of the device could
be for monitoring the power factor of a plant and then compensating for this, by connecting a
capacitor battery via the module’s digital I/O channels.
The channel has 6 primary inputs for measuring three-phase RMS current and RMS voltage. Input
overload alarms for the voltage and current inputs can be enabled. Using the primary inputs, the
following parameters are calculated:
Power factor, Power and Energy are measured for each of the three phases, and as a total. The
Total effective power level can be monitored, by enabling the user presettable HighLevel and
LowLevel alarms. The total effective power is integrated over time, and presented as Total,
Produced and Consumed Energy. The line frequency is also measured.
The primary inputs are precision factory calibrated. Automatic calculation of fullscale for voltage
and current inputs are possible, to ease calibration of the module when using current and voltage
transformers.
All variables are represented in engineering units. The power and energy variables can be
individually scaled for the most appropriate units, by using the Factors register.
Variables on Power Monitor channel.
Channel identifier: PowerMonitor
SWNo
Identifier
Memory type
Read out
Type
SI Unit
A0
Power
RAM Read Write
Decimal
Real
W
A1
Energy
RAM AutoSave
Decimal
Record
Wh
A2
PhasePower
RAM Read Write
Decimal
Record
W
A3
PhaseEnergy
RAM AutoSave
Decimal
Record
Wh
A4
Current
RAM Read Write
Decimal
Record
A
A5
Voltage
RAM Read Write
Decimal
Record
V
A6
PowerFactor
RAM Read Write
Decimal
Record
[]
A7
HighLevel
RAM Init EEPROM
Decimal
Real
W
A8
LowLevel
RAM Init EEPROM
Decimal
Real
W
A9
ChConfig
EEPROM RPW
- - -
Record
- - -
AA
LineFreq
RAM Read Write
Decimal
Real
Hz
AB
FullScale
EEPROM RPW
Decimal
Record
- - -
AC
Factors
EEPROM RPW
Decimal
Record
- - -
AD
Maintenance
EEPROM RPW
- - -
Record
- - -
AE
ChType
PROM Read Only
- - -
Record
- - -
AF
ChError
RAM Read Only
Binary
Record
- - -