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-3
IM 77C01E01-01E
1
2
3
4
5
A
Appendix 1 Specifications of PR300
Digital Input Specifications
It is used for control signals for optional integration or demand alarm release.
Control signal for optional integration: Starts and stops measurement of optional active energy.
Demand alarm release (with demand measuring function): Releases demand alarm.
Number of inputs 1
Input signal Voltage signal; ON signal: 4.5 to 25 V DC; OFF signal: within 1 V DC
Minimum ON time 50 ms
(Note 1) The control signal for optional integration can be controlled via communication. Once it is
controlled by digital input, it is the only means for controlling until the system is reset. System
reset can be performed via communication or by turning off/on of the power of the PR300.
(Note 2) In the PR300 with the demand measuring function, digital input can be used only to cancel the
demand alarm and cannot be used for control signals for optional integration.
Analog Output Specifications (additional output function)
The measured value is converted into the direct current signal for outputting.
Measurement item for output
One of active power, reactive power, apparent power, voltage-1, voltage-2, voltage-3, current-1,
current-2, current-3, power factor, and frequency
Output signal 4 to 20 mA DC
Output accuracy Measurement accuracy of measurement item for output +(0.5% of F.S.)
Allowable load resistance
0 to 600
Response speed 2 seconds or less (until 1% of the final value is reached)
Setting item Selection of measurement item for output, and lower, and upper limits of scaling
Setting range of lower/upper limits of scaling according to measurement item for output
Active power –rated power (W) to rated power (W)
Reactive power –rated power (var) to rated power (var)
Apparent power 0 to rated power (VA)
Voltage-1 to 3 0 to voltage range (V)
Current-1 to 3 0 to current range (A)
Power factor (LEAD) 0.5 to 1 to (LAG) 0.5
Frequency 45 to 65 (Hz)
Pulse Output Specifications (additional output function)
The pulse proportional to the energy is output.
Measurement item for output
One of active energy, regenerative energy, LEAD reactive energy, LAG reactive energy, and
apparent energy
Number of outputs 1
Output signal Open collector
Contact capacity 30 V DC, 200 mA
Pulse unit 0.1 to 5000.0 kWh/pulse (changeable in increments of 100 Wh)
Setting item Measurement items for output, pulse unit, and ON pulse width
ON pulse width The ON time of the output pulse is shown.
Setting range: 10 to 1270 ms (changeable in increments of 10 ms)
Setting should be made not to exceed the value of the maximum ON pulse width calculated by
the following equation:
Maximum ON pulse width (ms) =
Pulse unit [kWh/pulse] 3600 1000
2
Secondary rated power [W] VT ratio CT ratio 1.2 2
The pulse unit of reactive energy is kvarh/pulse, and that of apparent energy is kVAh/pulse.