Energy Meter Manual
Table Of Contents
- Introduction
- Notices
- Checking the Package
- Checking the Model and Suffix Codes
- Contents
- Chapter 1 Installation and Wiring
- 1.1 Installation with the ANSI 4-inch Round Form or JIS 110-square Instrument Size
- 1.2 Installation with the DIN 96-square Instrument Size
- 1.3 Wiring
- Crimping Terminal Recommendations
- Single-phase two-wire system (voltage input, current input, power supply)
- Single-phase three-wire system (voltage input, current input, power supply)
- Three-phase three-wire system (voltage input, current input, power supply)
- Three-phase four-wire system (voltage input, current input, power supply)
- Three-phase four-wire system (2.5 element) (voltage input, current input, power supply)
- Other Wiring
- 1.4 Attaching the Dust Cover and Terminal Cover
- Chapter 2 Preparations before Starting Measurement (Set up the PR300 First)
- Chapter 3 Parameter Setting Operations
- 3.1 Basic Parameter Setting Operations
- 3.2 Setting the VT and CT Ratios
- 3.3 Setting the Integrated Low-cut Power
- 3.4 Setting RS-485 Communication Conditions
- 3.5 Setting Ethernet Communication Conditions
- 3.6 Setting Pulse Output Conditions
- 3.7 Setting Analog Output Conditions
- 3.8 Setting Demand Measurement Conditions
- 3.9 Setting the Measured Value Display Pattern
- 3.10 Setting the “Indicator-out” Mode and Locking Parameters
- Chapter 4 Operation for Display of Measurement Items and Measurement Method
- 4.1 Measurement Items
- 4.2 Switching Display Pattern
- 4.3 Displaying Measured, Instantaneous, and Maximum/Minimum Values
- Example Display and Measuring Ranges of Active Power (Regenerative Power)
- Example Display and Measuring Ranges of Reactive Power
- Example Display and Measuring Ranges of Apparent Power
- Example Display and Measuring Ranges of Voltage
- Example Display and Measuring Ranges of Current
- Example Display and Measuring Ranges of Power Factor
- Example Display and Measuring Ranges of Frequency
- How to Switch between Instantaneous Value, Maximum Value, and Minimum Value
- 4.4 Phase Switching for Voltage and Current
- 4.5 Displaying Energy Values
- 4.6 Resetting Measured Values
- 4.7 Demand Measurement (Optional Measuring Function)
- Chapter 5 Troubleshooting
- Appendix
- Appendix 1 Specifications of PR300
- Measuring Function
- Power Items and Equations
- Input Specifications
- Digital Input Specifications
- Analog Output Specifications (additional output function)
- Pulse Output Specifications (additional output function)
- Demand Alarm Output Specifications (optional measuring function)
- Communication Specifications
- Standard Performance
- Safety and EMC Standards
- Environmental Conditions
- Mounting and Shape
- Appendix 2 System Reset
- Appendix 3 Parameter Map
- Appendix 4 Parameter List
- Appendix 5 Alphanumeric Characters Table for 7-segment LED
- Appendix 1 Specifications of PR300
- Index
- A
- C
- D
- E
- H
- I
- M
- O
- P
- R
- S
- T
- V
- W
- Wiring diagram
- Single-phase two-wire system
- Single-phase three-wire system
- Three-phase three-wire system
- Three-phase four-wire system
- Three-phase four-wire system (2.5 element)
- Analog output
- Demand alarm output
- Demand alarm release
- Ethernet communication
- Integration control signal
- Palse output
- RS-485 communication
- Wiring diagram
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
(
*
)
0.001])
Maximum/minimum values They are calculated in the range of
[– primary rated power
(
*
)
1.2] to [primary rated power
(
*
)
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
(
*
)
0.001].)
Maximum/minimum values
They are calculated in the range of 0 to [(primary rated power
(
*
)
) 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
(
*
)
) 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
(
*
)
) 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) 1.2]
(whichever is larger of the LEAD or LAG value).
Minimum value
It is calculated in the range between 0 and [(rated value) 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 VT ratio CT ratio
(Secondary rated power is the rated power of PR300.)