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
Operation for Display of Measurement Items and Measurement Method
4-7
IM 77C01E01-01E
1
2
3
4
5
A
4.5 Displaying Energy Values
This section explains the measuring range and display method of active energy, regenerative energy,
LEAD reactive energy, LAG reactive energy, and apparent energy.
Example Display and Measuring Ranges of Active Energy and Regenerative Energy
Regenerative
energy
Active energy
Secondary rated power
VT ratio CT ratio
Less than 100 kW
100 kW to less than 1 MW
1 MW to less than 10 MW
10 MW or greater
Type
A
B
C
D
Measuring range
0 to 99999 kWh
0.00 to 999.99 MWh
0.0 to 9999.9 MWh
0 to 99999 MWh
* For all the four types in the table, decimal places that
are not appearing can be displayed by key operation
(refer to “Operation for Energy Value Display” on the
next page).
Supplementary
unit
(refer to the
table on the right)
“-” will always appear when the displayed
value is a regenerative energy value.
Example Display and Measuring Ranges of LEAD Reactive Energy and LAG Reactive Energy
LEAD reactive
energy
LAG reactive
energy
Secondary rated power
VT ratio CT ratio
Less than 100 kW
100 kW to less than 1 MW
1 MW to less than 10 MW
10 MW or greater
Type
A
B
C
D
Measuring range
0 to 99999 kvarh
0.00 to 999.99 Mvarh
0.0 to 9999.9 Mvarh
0 to 99999 Mvarh
* For all the four types in the table, decimal places that
are not appearing can be displayed by key operation
(refer to “Operation for Energy Value Display” on the
next page).
Supplementary
unit
(refer to the
table on the right)
“-” will appear when the displayed
value is a LEAD reactive energy value.
Example Display and Measuring Ranges of Apparent Energy
Apparent
energy
Secondary rated power
VT ratio CT ratio
Less than 100 kW
100 kW to less than 1 MW
1 MW to less than 10 MW
10 MW or greater
Type
A
B
C
D
Measuring range
0 to 99999 kVAh
0.00 to 999.99 MVAh
0.0 to 9999.9 MVAh
0 to 99999 MVAh
* For all the four types in the table, decimal places that
are not appearing can be displayed by key operation
(refer to “Operation for Energy Value Display” on the
next page).
Supplementary
unit
(refer to the
table on the right)
NOTE
When the power is below the integrated low-cut power, it is not integrated as energy.