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
3-14
IM 77C01E01-01E
For the PR300 with demand measurement function only
3.8 Setting Demand Measurement Conditions
This section explains how to set demand measurement conditions by taking as an example the case
when the demand alarm point is changed to 300 kW and demand alarm release function to manual
release, from their respective initial values.
Operation
Operation
4
6
7
5
8
9
10
3
Current value
VT Ratio screen
2
Demand Measurement Menu
screen
Demand Power/Current
screen
Demand Alarm Point Setting
screen
Demand Alarm Point Setting
screen
Demand Alarm Point Setting
screen
Measured Value screen
1
The parameter (VT ratio)
appears.
Press once.
The screen changes to the one
for setting the parameter
.
The parameter
(demand power/current)
appears.
Demand Alarm Point screen
The parameter
(demand alarm point) appears.
Press once.
Press once.
Demand Period screen
The parameter
(demand period) appears.
Demand Alarm Mask Time screen
The parameter
(demand alarm mask time)
appears.
Setpoint
Hold down for
at least 3 seconds.
Press once.
Press once.
Using or ,
show .
Using or ,
change the setpoint.
To move to the digit to be changed,
use the following keys:
To the left To the right
Press once while
the setpoint is blinking.
Press once to
blink the setpoint.
To re-set the parameter:
Press any key other than
while all digits of the
setpoint are blinking.
The PR300 returns to the initial
setting screen.