Appendix, Appendix 1 specifications of pr300, Measuring function – Yokogawa PR300 Power and Energy Meter User Manual
Page 58
Appendix
A-1
IM 77C01E01-01E
1
2
3
4
5
A
Appendix
Appendix 1 Specifications of PR300
Measuring Function
Active energy (regenerative energy)
The active power up to present is integrated, and the integrated value is output in units of kWh
or MWh (only kWh in the communication mode). The sign of integrated values of regenerative
power is “–,” and they are output as different data.
Reactive energy
LAG and LEAD reactive power up to present are integrated and output in units of kvarh or
Mvarh (only kvarh in the communication mode). The signs of LAG reactive power and LEAD
reactive power are “+” and “–,” respectively.
Apparent energy
Apparent power up to present is integrated and output in units of kVAh or MVAh (only kVAh in
the communication mode).
Optional active energy
While the control signal for optional integration is turned on, the active power is integrated and
output in units of Wh. The control signal for optional integration is turned on via communication
or by digital input.
Active power (regenerative power)
The present active power is output in units of W, kW, or MW. The sign of the value of
regenerative power is always "–."
Minimum resolution:
0.1 W (The minimum display resolution is the least significant
value of [primary rated power
(
*
)
ϫ 0.001])
Maximum/minimum values
They are calculated in the range of
[– primary rated power
(
*
)
ϫ 1.2] to [primary rated power
(
*
)
ϫ 1.2].
Apparent power
The present apparent power is output in units of VA, kVA, or MVA.
Minimum resolution
0.1 VA (The minimum display resolution is the least significant digit of
[(primary rated power
(
*
)
ϫ 0.001].)
Maximum/minimum values
They are calculated in the range of 0 to [(primary rated power
(
*
)
)
ϫ 1.2].
Reactive power
The present reactive power is output in units of var, kvar, or Mvar. The value of LEAD reactive
power is output with a “–” sign. The value of LAG reactive power is output without a positive sign.
(The signs of LEAD/LAG calculates according to the phase difference between V1 and I1.)
Minimum resolution
0.1 var
Maximum value
It is calculated in the range between 0 and [(primary rated power
(
*
)
)
ϫ 1.2]
(whichever is larger of the LEAD or LAG value).
Minimum value
It is calculated in the range between 0 and [(primary rated power
(
*
)
)
ϫ 1.2]
(whichever is smaller of the LEAD or LAG value).
Power factor
The present LEAD power factor is output as a value with a “–” sign. The present LAG power
factor is output as a value without a positive sign (a power factor is an rms value. The signs of
LEAD/LAG calculates according to the phase difference between V1 and I1.).
Minimum resolution
0.001
Maximum value
It is calculated in the range between 0 and [(rated value)
ϫ 1.2]
(whichever is larger of the LEAD or LAG value).
Minimum value
It is calculated in the range between 0 and [(rated value)
ϫ 1.2]
(whichever is smaller of the LEAD or LAG value).
Frequency
The frequency of the voltage line input to Voltage-1 is output in units of Hz.
Minimum resolution
0.1 Hz
Demand
The average power or the average current in the set demand period is measured
(refer to “3.8 Setting Demand Measurement Conditions“ and “4.7 Demand Measurement”).
* Primary rated power= secondary rated power
ϫ VT ratio ϫ CT ratio
(Secondary rated power is the rated power of PR300.)