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User’s
Manual
Model PR300
Power and Energy Meter
IM 77C01E01-01E
IM 77C01E01-01E
5th Edition
Introduction
Thank you for purchasing the PR300 Power and Energy Meter.
This manual provides information about the procedure for installing, wiring and operating the PR300
Power and Energy Meter, as well as precautions for handling the product. Read this manual carefully
before use, in order to use the product correctly and safely. (Record the parameter settings of the
PR300 on MEMO column in Appendix 4, “Parameter List” of this manual.)
■ Intended Readers
This manual is intended for personnel in charge of the installation and wiring, instrumentation and control
equipment, maintenance of equipment, and operation and monitoring.
■ Related Documents
The following user’s manuals all relate to the PR300 Power and Energy Meter. Read them as necessary.
Printed manuals
Model PR300 Power and Energy Meter Startup Manual <Installation> Document number: IM 77C01E01-02E
Model PR300 Power and Energy Meter Startup Manual <Initial Setup Operations>
Electronic manual (PDF file)
Model PR300 Power and Energy Meter Communication Interface User’s Manual (RS-485 and Ethernet Communications)
■Notes on This Manual
●The contents of this manual are subject to change without prior notice for reasons of performance and/
or functional enhancements.
●Every effort has been made to ensure accuracy in the preparation of this manual. Should any errors or
omissions come to your attention however, please contact your nearest Yokogawa branch or sales
office.
●Reprinting and reproducing the contents of this manual either in part or in their entirety, is prohibited
without the prior consent of Yokogawa.
●The document concerning TCP/IP software has been created by Yokogawa based on the BSD
Networking Software, Release 1 that has been licensed from the University of California.
■Trademark
●All the brands or names of Yokogawa Electric’s products used in this manual are either trademarks or
registered trademarks of Yokogawa Electric Corporation.
●Ethernet is a registered trademark of XEROX Corporation in the United States.
●Company and product names that appear in this manual are trademarks or registered trademarks of
their respective holders.
Document number: IM 77C01E01-03E
Document number: IM 77C01E01-10E
■Documentation Conventions
Symbols
This manual uses the following symbols.
●Symbols Used in the Main Text
NOTE
TIP Gives additional information to complement the present topic.
See Also Gives reference locations for further information on the topic.
Draws attention to information that is essential to understanding the operation and/or
features of the product.
■Description of Displays
(1) Some of the representations of product displays shown in this manual may be exaggerated,
simplified, or partially omitted for reasons of convenience when explaining them.
(2) Figures and illustrations representing the PR300’s displays may differ from the real displays in regard
to the position and/or indicated characters (uppercase or lowercase, for example), the extent of
difference does not impair a correct understanding of the functions and the proper operations and
monitoring of the system.
■Revision Information
1st Edition: April, 2006
2nd Edition: August, 2006
3rd Edition: February, 2007
IM 77C01E01-01E
4th Edition: June 2008
5th Edition: September, 2017
i
Notices
■Regarding This User’s Manual
• This manual should be passed on to the end user. Keep the manual in a safe place.
• Read this manual carefully to gain a thorough understanding of how to operate this product before you
start using it.
• This manual is intended to describe the functions of this product. Yokogawa Electric Corporation
(hereinafter referred to as Yokogawa) does not guarantee that these functions are suited to the
particular purpose of the user.
• Under absolutely no circumstances may the contents of this manual, in part or in whole, be transcribed
or reproduced without prior consent.
• The contents of this manual are subject to change without prior notice.
• Every effort has been made to ensure accuracy in the preparation of this manual. Should any errors or
omissions come to your attention however, please contact your nearest Yokogawa representative or
our sales office.
■Regarding Protection, Safety, and Prohibition Against Unauthorized Modification
• In order to protect the product and the system controlled by it against damage and ensure its safe use,
be certain to strictly adhere to all of the instructions and precautions relating to safety contained in this
document. Yokogawa does not guarantee safety if products are not handled according to these
instructions.
• The following safety symbols are used on the product and/or in this manual.
● Symbols Used on the Product and in This Manual
This symbol on the product indicates that the operator must refer to an explanation in the user’s manual
in order to avoid the risk of injury or death of personnel or damage to the instrument. The manual
describes how the operator should exercise special care to avoid electric shock, electrocution or other
dangers that may result in injury or loss of life.
Protective Grounding Terminal
This symbol indicates that the terminal must be connected to ground prior to operating the equipment.
CAUTION
● Power supply
Check that the voltage of the power supply agrees with the rated supply voltage of the Meter.
● Protective grounding
To avoid electric shock, be sure to provide protective grounding before turning on the Meter.
● Need for protective grounding
Do not cut the internal or external protective grounding conductor of the Meter or disconnect the
conductor from the protective grounding terminal. In either case, the protective functions of the
Meter will become ineffective, resulting in a hazardous situation.
● Defect of protective grounding
If the protective functions of protective grounding or fuses are assumed to be defective, do not
operate the Meter. Before putting the Meter into operation, check that the protective functions are
normal.
● Use in a gaseous environment
Do not put the Meter in operation in a location where any combustible or explosive gases or fumes
are present. It is extremely dangerous to use the Meter under such conditions.
● Removal of casing
No person except Yokogawa service personnel is allowed to remove the casing. Removing the
casing is hazardous since the Meter contains high-voltage parts.
● External wiring
Securely provide protective grounding before wiring the Meter to the measuring object or external
control circuit.
● Damage to protective construction
Operating the Meter in a way not described in this manual may impair the protective construction of
the Meter.
ii
IM 77C01E01-01E
■Force Majeure
• Yokogawa does not make any warranties regarding the product except those mentioned in the
WARRANTY that is provided separately.
• Yokogawa assumes no liability to any party for any loss or damage, direct or indirect, caused by the
use or any unpredictable defect of the product.
• Be sure to use the spare parts approved by Yokogawa when replacing parts or consumables.
• Modification of the product is strictly prohibited.
• Reverse engineering such as the disassembly or decompilation of the product is strictly prohibited.
• No portion of the product supplied by Yokogawa may be transferred, exchanged, leased, or sublet for
use by any third party without the prior permission of Yokogawa.
Checking the Package
Verify the package as explained below before starting to use the product. Should the delivered product
be wrong or the package be missing any item, contact the vendor from which you purchased the product.
Checking the Model and Suffix Codes
The PR300 bears a nameplate. Confirm that “MODEL” and “SUFFIX” (suffix codes) shown on the
nameplate agree with those of the product ordered.
Model
PR300
Phase and
wire system
Input voltage/
input current
Additional input and
output function
Communication function
Optional measuring function
Power supply
Phase indication format
0
1
0
0
A
Suffix Codes
-ⵧ ⵧ ⵧ ⵧ ⵧ -6 ⵧ -0
-3
-4
-5
1
2
2
3
Description
Power and Energy Meter
Universal three-phase three-wire system (single-phase two-wire,
single-phase three-wire, and three-phase three-wire systems)
Universal three-phase four-wire system (
phase three-wire, three-phase three-wire, and three-phase four-wire systems
Three-phase four-wire system (2.5 element)
Universal voltage input *2 (150 V, 300 V, 600 V) / 1 A
Universal voltage input *2 (150 V, 300 V, 600 V) / 5 A
1 digital input
1 digital input, 1 analog output
1 digital input, 1 pulse output
1 digital input, 1 analog output, 1 pulse output
RS-485 communication
3
3
-6
R
RS-485 communication, Ethernet communication
None
Demand measurement (1 demand alarm output)
100-240 V AC ±10% (50/60 Hz) or 130-300 V DC ±15%
A, B, and C indications
R, S, and T indications
Always 0
-0
*1 Can be used only when the voltage is in a state of equilibrium.
In cases where “Three-phase four-wire system (2.5 element)” is specified,
the input current specification of 1 A AC is not applicable.
*2 Set the voltage range (150 V, 300 V or 600 V) according to the rated input
voltage to be measured.
Rated input voltage
120 V
240 V
480 V
*3 For Ethernet communication, the RS-485 communication interface is
exclusively for the Ethernet-serial gateway function.
Voltage range
single-phase two-wire, single-
*1
*3
Allowable input voltage
150 V
300 V
600 V
)
150 V
300 V
600 V
IM 77C01E01-01E
Serial Number (NO.)
Also inform this number shown in “NO.” on the nameplate when contacting the vendor from which you
purchased the PR300.
iii
Checking the Package
Checking the Accessories
(1) JIS/ANSI-mounting kit
Bezel
(2) DIN-mounting
brackets
(for DIN 96-square
instr
ument panel
mounting)
(5) Shor
ting bar
(for RS-485 communication
termination)
(6) Tag number labels
Panel-mounting bracket
(3) Dust cover
(with 1 fixing screw)
(7) Star
tup Manuals
(Installation/Initial Setup Operations)
Model PR300
Power and Energy Me
<Initial S
etup O
Model PR300
Power and Energy Me
<Installation
>
p
erations>
Panel-mounting bolts (2)
Bracket-fixing screws (2)
Nuts (2)
Flat washers (2)
Spring washers (2)
(4) Terminal cover
(with 3 fixing screws)
ter
ter
Item Name
(1) JIS/ANSI-mounting kit
(2) DIN-mounting brackets
Bezel
Panel-mounting bracket
Panel-mounting bolts
Bracket-fixing screws
Flat washers
Spring washers
Nuts
Qty
1
1
2
2
2
2
2
2
Remarks
Used to mount the PR300 according to the ANSI 4-inch round
form size or JIS110-square instrument size.
Used to mount the PR300 according to the DIN 96-square
instrument size.
(3) Dust cover
Fixing screw
(4) Terminal cover
Fixing screws
(5) Shorting bar
(6) Tag number label
(7) Startup manual
1
1
1
3
1
2
2
iv
Attached onto the top of the PR300 main unit.
Attached to the PR300 terminal section. (Must always be
attached to avoid a possible electric shock.)
Used in RS-485 communication if the
PR300
is a terminal device.
A quick reference manual for use in initial installation.
IM 77C01E01-01E
1
Model PR300 Power and Energy Meter
1
IM 77C01E01-01E
2
3
Contents
Introduction....................................................................................................................i
Notices ..................................................................................................................... ii
Checking the Package ................................................................................................ iii
■ Checking the Model and Suffix Codes ...................................................................................... iii
■ Checking the Accessories ......................................................................................................... iv
Chapter 1 Installation and Wiring
1.1 Installation with the ANSI 4-inch Round Form or JIS 110-square Instrument Size............ 1-1
External Dimensions ...................................................................................................................1-1
Panel Cutout Dimensions ........................................................................................................... 1-1
Mounting Method......................................................................................................................... 1-2
1.2 Installation with the DIN 96-square Instrument Size .......................................................... 1-3
External Dimensions ...................................................................................................................1-3
Panel Cutout Dimensions ........................................................................................................... 1-3
Mounting Method......................................................................................................................... 1-4
1.3 Wiring ..................................................................................................................................1-5
Crimping Terminal Recommendations ........................................................................................1-5
Single-phase two-wire system (voltage input, current input, power supply) .............................1-6
Single-phase three-wire system (voltage input, current input, power supply) ........................... 1-6
Three-phase three-wire system (voltage input, current input, power supply) ........................... 1-6
Three-phase four-wire system (voltage input, current input, power supply) ............................. 1-7
Three-phase four-wire system (2.5 element) (voltage input, current input, power supply) ....... 1-7
Other Wiring ................................................................................................................................ 1-8
1.4 Attaching the Dust Cover and Terminal Cover ...................................................................1-9
Chapter 2 Preparations before Starting Measurement (Set up the PR300 First)
2.1 Component Names and Functions ..................................................................................... 2-1
2.2 Setting the Phase and Wire System ...................................................................................2-2
Range of Phase and Wire System Options ................................................................................2-3
2.3 Setting the Voltage Range ..................................................................................................2-4
Range of Voltage Range Options ...............................................................................................2-5
Chapter 3 Parameter Setting Operations
3.1 Basic Parameter Setting Operations ..................................................................................3-1
Methods of Changing Parameter Setpoints ............................................................................... 3-1
3.2 Setting the VT and CT Ratios ............................................................................................. 3-2
Setting the VT Ratio ....................................................................................................................3-2
Setting the CT Ratio ....................................................................................................................3-3
3.3 Setting the Integrated Low-cut Power................................................................................. 3-4
3.4 Setting RS-485 Communication Conditions ....................................................................... 3-6
3.5 Setting Ethernet Communication Conditions ......................................................................3-8
3.6 Setting Pulse Output Conditions .......................................................................................3-10
3.7 Setting Analog Output Conditions ..................................................................................... 3-12
Relationship between Scale Values and Measurement Inputs (Example) ..............................3-13
3.8 Setting Demand Measurement Conditions .......................................................................3-14
3.9 Setting the Measured Value Display Pattern ....................................................................3-16
3.10 Setting the “Indicator-out” Mode and Locking Parameters...............................................3-19
Setting the Indicator-out Mode..................................................................................................3-19
Locking and Unlocking Parameters ..........................................................................................3-20
4
5
A
I
IM 77C01E01-01E
TOC-1
Contents
Chapter 4
Operation for Display of Measurement Items and Measurement Method
4.1 Measurement Items ............................................................................................................4-1
4.2 Switching Display Pattern ...................................................................................................4-2
Switching Display Pattern ...........................................................................................................4-2
Initial Values and Example Display Patterns ..............................................................................4-2
4.3 Displaying Measured, Instantaneous, and Maximum/Minimum Values............................. 4-3
Example Display and Measuring Ranges of Active Power (Regenerative Power) ................... 4-3
Example Display and Measuring Ranges of Reactive Power .................................................... 4-3
Example Display and Measuring Ranges of Apparent Power ...................................................4-3
Example Display and Measuring Ranges of Voltage .................................................................4-4
Example Display and Measuring Ranges of Current ................................................................. 4-4
Example Display and Measuring Ranges of Power Factor ........................................................ 4-4
Example Display and Measuring Ranges of Frequency ............................................................4-5
How to Switch between Instantaneous Value, Maximum Value, and Minimum Value ..............4-5
4.4 Phase Switching for Voltage and Current ...........................................................................4-6
How to Switch the Phase for Single-phase Three-wire, Three-phase Three-wire and
How to Switch the Phase for Three-phase Four-wire System ...................................................4-6
How to Read the Phase Indication Lamp ...................................................................................4-6
Three-phase Four-wire (2.5 element) Systems .......................................................... 4-6
4.5 Displaying Energy Values ...................................................................................................4-7
Example Display and Measuring Ranges of Active Energy and Regenerative Energy ............4-7
Example Display and Measuring Ranges of LEAD Reactive Energy and LAG Reactive Energy ....
Example Display and Measuring Ranges of Apparent Energy ..................................................4-7
Operation for Energy Value Display ........................................................................................... 4-8
Optional Integrating Function...................................................................................................... 4-9
4.6 Resetting Measured Values ..............................................................................................4-10
Resetting Maximum and Minimum Values ...............................................................................4-10
Resetting Energy Value............................................................................................................. 4-10
Canceling Reset Item Selection (Returning to the Measured Value screen without resetting) ......
Reset Items and Details ............................................................................................................ 4-11
4.7 Demand Measurement (Optional Measuring Function) ...................................................4-12
Example Demand Display and Measuring Ranges .................................................................. 4-12
Demand Measurement Procedure ............................................................................................ 4-12
Operation for Demand Measurement .......................................................................................4-13
Demand Alarm ...........................................................................................................................4-14
Example Demand Measurement .............................................................................................. 4-14
Chapter 5 Troubleshooting
5.1 Error Display and Recommended Response ..................................................................... 5-1
5.2 Maintenance ........................................................................................................................5-2
Appendix
Appendix 1 Specifications of PR300 ......................................................................................... A-1
Measuring Function .................................................................................................................... A-1
Power Items and Equations ....................................................................................................... A-2
Input Specifications .................................................................................................................... A-2
Digital Input Specifications ......................................................................................................... A-3
Analog Output Specifications (additional output function) ........................................................ A-3
Pulse Output Specifications (additional output function) .......................................................... A-3
Demand Alarm Output Specifications (optional measuring function) ....................................... A-4
Communication Specifications ................................................................................................... A-4
Standard Performance ............................................................................................................... A-6
Safety and EMC Standards ....................................................................................................... A-7
Environmental Conditions .......................................................................................................... A-8
Mounting and Shape .................................................................................................................. A-8
Appendix 2 System Reset ........................................................................................................... A-9
Appendix 3 Parameter Map....................................................................................................... A-10
Appendix 4 Parameter List ....................................................................................................... A-12
Appendix 5 Alphanumeric Characters Table for ............................................................................
7-segment LED ............................................................................................................... A-16
Index
4-7
4-11
TOC-2
IM 77C01E01-01E
1
Chapter 1 Installation and Wiring
1.1 Installation with the ANSI 4-inch Round Form or JIS 110-square Instrument Size
The PR300 can be installed so that it handles ANSI 4-inch round form or JIS 110-square instruments
panel cutouts by attaching the “JIS/ANSI-mounting kit” accessory.
External Dimensions
(126.5) (109)
104.5
Dust cover
2-M5
1 to 10
23
(Acceptable panel thickness for mounting)
1.5
Terminal cover
110 109
Panel Cutout Dimensions
110
22
2
Bezel
1
Installation and Wiring
Unit: mm
ANSI
42.9±0.4
[1.688±0.015]
42.9±0.4
[1.688±0.015]
Multiple Mounting
42.9±0.4
[1.688±0.015] [1.688±0.015]
42.9±0.4
[6.299 min.]
160 min.
[6.299 min.]
160 min.
ø101.6
[ø4.000]
ø7.9
[ø0.312]
JIS
45±0.3
45±0.3
45±0.3 45±0.3
Unit: mm
[approx. inch]
ø101
ø6.5
When installing the PR300, provide spacing of 50 mm
or more between each face of the PR300 body and the
instrument next to the PR300 or between each face
and the wall surface.
● Normal Allowable Deviation = (Value of JIS B 0401-1998 Tolerance Grade IT18) / 2
IM 77C01E01-01E
1-1
1.1 Installation with the ANSI 4-inch Round Form or JIS 110-square Instrument Size
WARNING
● Install the PR300 in the secondary side
of the existing breaker.
● Provide spacing of 50 mm or more
between the products.
Mounting Method
Set the direction of the panel-mounting bracket.
1
The diagram on the right shows the front of the
bracket (the side into which the panel-mounting
bolt is inserted). Rotating the bracket 90°
makes the bracket compatible with either ANSI
or JIS panel cutouts. Set the bracket to either
the ANSI or JIS mark according to which type
of panel you are installing, as shown in the
diagram on the right.
4
Bezel
(standard accessory)
NOTE
● Do not install the PR300 in the following types of
environments, as they may cause the PR300 to
malfunction or fail. Avoid sites:
exposed to significant shock or vibration; where corrosive
gases are present; where large amounts of dust are present;
exposed to water; exposed to direct sunlight; outside; at
altitudes above 2000 m.
●
The PR300 mounting position is for vertical panels only.
Front of the bracket
ANSI
Rotate 90°
Insert two panel-mounting bolts
2
into the front of the panelmounting bracket as shown in
the diagram on the left.
Front of the bracket
JIS
PR300
Panel-mounting bolt
(standard accessory: 2 bolts)
Panel-mounting bracket
(standard accessory)
Panel-mounting bolt
Fix the panel-mounting bracket
3
securely to the back of the PR300
with two bracket-fixing screws as
shown in the diagram on the left.
(recommended tightening
torque: 0.8 N•m)
2
Bracket-fixing screw
(standard accessory: 2 screws)
6
5
3
Flat washer, spring washer, and nut
(standard accessory: 2 of each)
Attach the bezel from the front of
4
the PR300.
Insert the PR300 from its rear
5
through the mounting cutout in
the panel as shown in the
diagram.
Secure the PR300’s panel-
6
mounting bolts by tightening
them with the washers and nuts.
(recommended tightening
torque: 2.0 N•m)
1-2
IM 77C01E01-01E
1
1.2 Installation with the DIN 96-square Instrument Size
External Dimensions
110
96
12.3
(124.5) (109)
112.2
Dust cover
1.5
1
Installation and Wiring
Unit: mm
96
Panel Cutout Dimensions
+0.8
92
0
(68)
+0.8
92 (68)
0
1 to 10
(Acceptable panel
thickness for mounting)
160 min.
109
Terminal cover
Mounting bracket
(2 places)
Unit: mm
160 min.
When installing the PR300, provide spacing of 50 mm
or more between each face of the PR300 body and the
instrument next to the PR300 or between each face
and the wall surface.
● Normal Allowable Deviation = (Value of JIS B 0401-1998 Tolerance Grade IT18) / 2
IM 77C01E01-01E
1-3
1.2 Installation with the DIN 96-square Instrument Size
WARNING
● Install the PR300 in the secondary side
of the existing breaker.
● Provide spacing of 50 mm or more
between the products.
Mounting Method
NOTE
● Do not install the PR300 in the following types of
environments, as they may cause the PR300 to
malfunction or fail. Avoid sites:
exposed to significant shock or vibration; where corrosive
gases are present; where large amounts of dust are present;
exposed to water; exposed to direct sunlight; outside; at
altitudes above 2000 m.
●
The PR300 mounting position is for vertical panels only.
Insert the PR300 from its rear through the mounting
1
cutout in the panel as shown in the diagram.
2
Mounting bracket
(standard accessory: 2 brackets)
Affix the mounting brackets to the left and right
2
sides of the PR300. Secure the brackets to the
PR300 by tightening the screws in the end of the
mounting brackets with a screwdriver as shown in
the diagram.
(recommended tightening torque: 0.4 N•m)
1-4
IM 77C01E01-01E
1
1.3 Wiring
WARNING
● As there is a danger of electric shock, turn off the power supply and check that the cables to be
connected are not conducting electricity before carrying out the wiring procedure.
● For safety, be sure to install a circuit breaker switch that conforms to an IEC60947-compatible
product, 5 A, 100 V or 220 V AC near the PR300 so as to be operated easily, and clearly indicate
that the device is used to de-energize the PR300.
● The wiring procedure for the PR300 should be carried out by a qualified person (an electrician etc.)
with knowledge of electrical matters and who has actual experience.
● Install a current transformer (CT) inside a panel when using a conduit for wiring.
● Use a UL Listed Panel only for the panel on which the PR300 is installed.
● If the voltage is below 600 V AC, it is possible to connect the PR300 directly without using a voltage
transformer (VT) and if the current is below 5 A AC, it is possible to do so without using a current
transformer (CT). However, in order to use the PR300 safely, the use of VT and CT is recommended. Use a UL Listed VT and CT for the PR300.
● Perform wiring for the voltage and current input in the same circuit.
● Check the following before turning on the power. Using the PR300 beyond the stated specifications
may cause it to heat up and burn out.
• Check that the power supply voltage, input voltage, and input current values to be applied to the
PR300 agree with its specifications.
•
Check that the external wiring is connected to the terminals in accordance with the specifica-tions.
● Do not touch the screws in locations (a) to (f) shown in the wiring diagrams. They are an essential
part of the structure of the PR300. Loosening or tightening them may result in a malfunction or
failure of the PR300.
● Be sure to attach the terminal cover to prevent electric shock (refer to Section 1.4) .
1
Installation and Wiring
NOTE
● When attaching the terminal cover
Since the terminal cover of PR300 has the structure of preventing electric shock, the terminal cover
cannot be attached after completing all wiring. Refer to Section 1.4, “Attaching the Dust Cover and
Terminal Cover” before wiring.
(1) Attach the terminal cover after completing the wiring to the terminals 2, 4, 6, 8, 23, 24, and 25.
(2) Execute the wiring to the terminals other than those mentioned above after attaching the
terminal cover.
If the dust cover is required, attach it before attaching the terminal cover.
●
Do not ground the input circuit when connecting voltage and current directly without using VT and CT.
Carry out the wiring referring to the diagrams on pages 1-6, 1-7, and 1-8. The wiring for voltage input,
current input, and power supply is M4 screw terminal connection. For other wiring it is M3 screw terminal
connection. The connector for connecting to the Ethernet is RJ45.
Use strand wires for the wiring. Wiring cables with a nominal cross-sectional area of 1.25 mm
are recommended for voltage/current input and power supply; cables with a nominal cross-sectional area
of 0.5 mm
Crimping Terminal Recommendations
Ring tongue
terminal
(A)
2
or thicker are recommended for other signals.
Spade tongue
(F)
(ød)
terminal
4.7 max.
(ød)
(A)
(F)
2
or thicker
Applicable
terminals
Applicable wire size: 1.04 to 2.63 mm2 for M4, 0.25 to 1.65 mm2 for M3
ød (mm)
M4M34.4 max.
3.3 max.
(mm)F (mm)
A
7.0 max.
5.8 max.
7.8 max.
6.7 max.
Recommended
tightening torque
1.2 N•m
0.6 N•m
IM 77C01E01-01E
1-5
1.3 Wiring
Single-phase two-wire system (voltage input, current input, power supply)
Power-source side
12
k
K
CT
L
l
NOTE
Do not ground the input
circuit when connecting
voltage and current directly
without using VT and CT.
u
U
Fuse
v
V
VT
1S
1L
P1
P2
1
a
2 3
45
6
7
9
8
b
10
11
12
13
14
15
16
c
17
e
18
19
20
21
22
d
Lⴙ
23
24
Nⴚ
Power supply voltage
f
25
100-240V AC 10% or
130-300V DC 15%
PE
Load side
Single-phase three-wire system (voltage input, current input, power supply)
Power-source side
1N2
k
K
CT
L
K
l
L
NOTE
Do not ground the input
circuit when connecting
voltage and current directly
without using VT and CT.
k
CT
l
U
u
Fuse
v
V
v
V
u
U
VT
1S
1L
2S
2L
P1
P0
P2
1
a
23
4 5
6
7
9
8
b
10
11
12
13
14
15
16
Refer to
c
17
e
18
19
23
20
24
21
f
22
25
d
“Other Wiring”
Lⴙ
Power supply
Nⴚ
Power supply voltage
100-240V AC 10% or
130-300V DC 15%
PE
Refer to
“Other Wiring”
Power supply
Load side
Three-phase three-wire system (voltage input, current input, power supply)
Power-source side
1-6
123
A
(R)B(S)C(T)
K
k
CT
L
l
Load side
K
L
NOTE
Do not ground the input
circuit when connecting
voltage and current directly
without using VT and CT.
k
CT
l
u
U
Fuse
v
V
v
V
u
U
VT
1S
1L
3S
3L
P1
P2
P3
1
a
23
4 5
6
7
9
8
b
10
11
12
13
14
15
16
c
17
e
18
19
20
21
22
d
Lⴙ
23
24
Nⴚ
Power supply voltage
f
25
100-240V AC 10% or
130-300V DC 15%
PE
Refer to
“Other Wiring”
Power supply
IM 77C01E01-01E
1
1.3 Wiring
Three-phase four-wire system (voltage input, current input, power supply)
Power-source side
N1
23
A
(R)B(S)C(T)
K
k
CT
L
lk
K
CT
L
l
Load side
NOTE
Do not ground the input
circuit when connecting
voltage and current directly
without using VT and CT.
K
k
CT
L
l
U
u
Fuse
v
V
u
U
v
V
u
U
v
V
VT
1S
1L
2S
2L
3S
3L
P1
P0
P2
P3
1
a
23
45
6
7
9
8
b
10
11
12
13
14
15
16
Refer to
c
17
e
18
19
23
20
24
21
f
22
25
d
“Other Wiring”
Lⴙ
Power supply
Nⴚ
Power supply voltage
100-240V AC 10% or
130-300V DC 15%
PE
Three-phase four-wire system (2.5 element) (voltage input, current input, power supply)
Power-source side
N1
23
A
(R)B(S)C(T)
K
k
CT
L
lk
K
CT
L
l
NOTE
Do not ground the input
circuit when connecting
voltage and current directly
without using VT and CT.
K
k
CT
L
l
U
u
Fuse
v
V
v
V
u
U
VT
1S
1L
2S
2L
3S
3L
P1
P0
P3
1
a
23
45
6
7
9
8
b
10
11
12
13
14
15
16
Refer to
c
17
e
18
19
23
20
24
21
f
22
25
d
“Other Wiring”
Lⴙ
Power supply
Nⴚ
Power supply voltage
100-240V AC 10% or
130-300V DC 15%
PE
1
Installation and Wiring
IM 77C01E01-01E
Load side
1-7
1.3 Wiring
Other Wiring
Analog output
+
11
12
−
Output signal:
4 to 20 mA DC
Pulse output
+
13
14
−
Contact capacity
30V DC, 200mA
(resistive load)
Demand alarm output
ALM+
15
16
ALM−
Contact capacity
30V DC, 200mA
(resistive load)
RJ45 connector
10BASE-T
100BASE-TX
c
1
a
23
45
6
7
9
8
b
10
11
12
13
14
15
16
17
18
19
20
21
22
d
Ethernet communication
Color
Description
Color
Description
Switching between 10BASE-T and
100BASE-TX takes place automatically.
Switching between half and full duplex
takes place automatically.
Link LED
Off
Stopped
Active LED
Off
Stopped
Orange
10Mbps
Orange
Half
duplex
Green
100Mbps
Green
Full
duplex
RS-485 communication
TERM
17
R
e
23
24
f
25
*1 If Ethernet communication is used, the
RS-485 communication interface is used
specifically for the Ethernet-serial gateway function.
*2 In the case of the PR300 with the
demand measuring function, the demand
alarm release is selected.
18
19
20
When terminating, short-circuit
terminals 17 and 18 with the
shorting bar.
Optional integration
control signal or demand
alarm release
21
22
Voltage signal
ON signal: 4.5 to 25 V DC
OFF signal: within 1V DC
*1
Aⴚ
Bⴙ
SG
R:120(built-in)
*2
DIⴙ
DIⴚ
1-8
IM 77C01E01-01E
1
1.4 Attaching the Dust Cover and Terminal Cover
WARNING
As there is a danger of electric shock, do not attach the dust cover and terminal cover while the wires are live.
NOTE
● Attach the dust cover before attaching the terminal cover.
● The recommended tightening torque for the screws for attaching the dust cover and terminal cover
is 0.8N•m.
Attaching the Dust Cover Attaching the Terminal Cover
1
Insert the two protruding portions on the underside of
the dust cover into the grooves on the upper side of
the PR300 as shown in the diagram below.
1
Complete the wiring to the terminals 2, 4, 6, 8, 23,
24 and 25, then secure the terminal cover in the
open state shown in the diagram below with the two
screws provided.
1
Installation and Wiring
Insert into
the ▼
marked
grooves
2
Secure the dust cover with the screw provided as
shown in the diagram below.
Dust cover
(standard
accessory)
2
Complete the wiring to other terminals with the
terminal cover open shown in the diagram below.
3
Close the terminal cover and secure it with the
screw provided as shown in the diagram below.
IM 77C01E01-01E
1-9
Chapter 2 Preparations before Starting Measurement (Set up the PR300 First)
2.1 Component Names and Functions
Demand Alarm lamp < 9 >
Pulse Output lamp <10>
Communication lamp <11>
Power lamp < 1 >
MAX and MIN lamps < 6 >
Phase Indication lamps < 7 >
DEMAND lamp < 8 >
Name
<1> Power lamp
<2> Phase and Wire
System lamps
<3> Input Range lamps
Display Color
Green
Green
Green
< 2 > Phase and Wire
System lamps
< 3 > Input Range lamps
< 4 > Measured Value display
Upper display
< 5 > Unit lamps
Middle display
Lower display
<12> Operation keys
Description
Lights up and remains lit when the PR300 is turned on and operating normally.
Blinks (4 times/second) if a communication error occurs, and continues to blink
until the PR300 returns to normal.
The phase and wire system option set in the PR300 lights up.
The voltage range option set in the PR300 and the current range (rated input) option
specified at the time of ordering light up.
2
Preparations before Starting Measurement (Set up the PR300 First)
<4> Measured Value
display
<5> Unit lamps
<6> MAX and MIN lamps
<7>
Phase Indication lamps
<8> DEMAND lamp
<9> Demand Alarm lamp
<10> Pulse Output lamp
<11> Communication lamp
<12> Operation keys
Red
Red
Red
Red
Red
Red
Green
Green
Shows a measured value of power, energy, etc. Also shows a parameter symbol and
its setpoint at the time of parameter setting.
Show the unit symbol of a measured value for each measurement item. These unit
symbols are shown in combination depending on the type of measured value.
Light up when the maximum or minimum measured value is displayed.
Light up to tell for which phase the voltage or current value is being measured.
Lights up when the measured value of demand power or demand current is
displayed. (Only supported for a PR300 with the demand measuring function.)
Lights up if the demand value exceeds the demand alarm point at any point in time
other than the demand alarm mask time.
Lights up when the output is turned on in the pulse output mode and goes out when
the output is turned off.
Blinks while RS-485 or Ethernet communication is in progress.
On the Measured Value screen, this key is used, for example, to switch the display
pattern. Also used to set parameters on the Parameter screen.
On the Measured Value screen, these keys are used, for example, to move from one
digit to another in an energy reading. Also used to set parameters on the Parameter
screen.
On the Measured Value screen, this key is used, for example, to show the
maximum/minimum value. Also used to set parameters on the Parameter screen.
On the Measured Value screen, this key is used, for example, to switch the phase of
voltage/current. Also used to set parameters on the Parameter screen.
IM 77C01E01-01E
This key is used to start or stop demand measurement. The lamp (green) in the key
lights up in the demand measurement.
2-1
2.2 Setting the Phase and Wire System
Operation
This section explains how to set the phase and wire system by taking as an example the case when a
three-phase four-wire system is changed to a three-phase three-wire system.
Operation
Startup screen
Turn on the PR300.
Phase and Wire System screen
1
The PR300 shows the station
number for about 5 seconds,
then the Measured Value screen
appears.
Measured Value screen
Phase and Wire System
Setting screen
The Phase and Wire System
screen appears.
Parameter symbol for
phase and wire system
Current value
Press once.
6
The Phase and Wire System
Setting screen appears.
Setpoint
VT Ratio screen
Specification Change
Confirmation screen
Specification Change
Confirmation screen
Hold down for
2
3
4
at least 3 seconds.
The parameter (VT ratio)
appears.
Simultaneously hold
down
for at least 3
seconds.
The Specification Change
Confirmation screen appears.
Using or ,
show on the
lower display.
Using or ,
7
Phase and Wire System
Setting screen
+
8
Phase and Wire System
Setting screen
9
Phase and Wire System
screen
Current value
select the setpoint.
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.
Press once while
the setpoint is blinking.
The setpoint is confirmed and the PR300
returns to the Phase and Wire System
screen. The phase and wire system
thus set is shown as the current value.
When proceeding to set the
voltage range, start from step
in Section 2.3, “Setting the
6
Voltage Range,” with this
screen (figure on the left)
shown as is.
2-2
5
Press once.
10
Hold down for
at least 3 seconds.
IM 77C01E01-01E
2.2 Setting the Phase and Wire System
Startup screen
The PR300 shows the Startup
screen for about 5 seconds, then the
Measured Value screen appears.
Measured Value screen
Setting completed.
NOTE
If you change the phase and wire system, all parameters other than those related to RS-485 and
Ethernet communications are initialized (to factory-set values). Change the phase and wire system
before setting parameters such as the VT and CT ratios.
2
Preparations before Starting Measurement (Set up the PR300 First)
Range of Phase and Wire System Options
Parameter
Symbol
Parameter
Name
Phase and
wire system
Setting Type Setting Range (Details)
Selection
Model and Suffix Codes
Single-phase
two-wire system
Single-phase
three-wire system
Three-phase
three-wire system
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)
Initial Value
(Factory-set
Value)
Three-phase
three-wire
system
Three-phase
four-wire
system
Three-phase
four-wire system
(2.5 element)
IM 77C01E01-01E
NOTE
● If single-phase three-wire system is selected, the voltage range is fixed at 300 V (between P0 and
P1, P0 and P2). The voltage range cannot be selected.
● Three-phase four-wire system (2.5 element) can be used only when the voltage is in a state of
equilibrium. In addition, the phase and wire system cannot be changed.
2-3
2.3 Setting the Voltage Range
Operation
This section explains how to set the voltage range by taking as an example the case when the voltage
range is changed from 300 V to 600 V.
Operation
Startup screen
Turn on the PR300.
1
Phase and Wire System screen
The Phase and Wire System
screen appears.
Measured Value screen
VT Ratio screen
Specification Change
Confirmation screen
The PR300 shows the station
number for about 5 seconds,
then the Measured Value screen
appears.
Hold down
2
3
for at least 3 seconds.
The parameter (VT ratio)
appears.
Simultaneously hold
down
for at least 3
seconds.
The Specification
Change Confirmation screen
appears.
Using or ,
show the Voltage
Range screen.
6
Voltage Range screen
The Voltage Range screen
appears.
Parameter symbol
for voltage range
Current value
Press once.
7
Voltage Range Setting screen
The Voltage Range Setting
screen appears.
Setpoint
+
Using or ,
8
Voltage Range Setting screen
select the setpoint.
Specification Change
Confirmation screen
2-4
4
5
Using or ,
show on the
lower display.
Press once.
9
Voltage Range Setting screen
10
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.
Press once while
the setpoint is blinking.
IM 77C01E01-01E
2.3 Setting the Voltage Range
Voltage Range screen
NOTE
If you change the voltage range, all parameters other than those related to RS-485 and Ethernet
communications are initialized (to factory-set values).Change the voltage range before setting
parameters such as the VT and CT ratios.
The setpoint is confirmed and the PR300
returns to the Voltage Range screen.
The voltage range thus set is shown as
the current value.
Current value
Hold down for at
11
least 3 seconds.
When proceeding to set the
phase and wire system, press
or to show the
Phase and Wire System
screen, with this screen
(figure in the upper-left
corner) shown as is. After
showing the Phase and Wire
System screen, start from
step
in Section 2.2, “Setting
6
the Phase and Wire System.”
Startup screen
The PR300 shows the Startup
screen for about 5 seconds,
then the Measured Value
screen appears.
2
Preparations before Starting Measurement (Set up the PR300 First)
Measured Value screen
Setting completed.
Range of Voltage Range Options
Parameter
Symbol
Parameter Name Setting Type Setting Range (Details)
Voltage range
NOTE
● The voltage range of single-phase three-wire system is fixed at 300V (between P0 and P1, P0 and
P2). The voltage range cannot be selected.
● Select the voltage range of three-phase four-wire system by the phase voltage (between P0 and P1,
P0 and P2, P0 and P3).
Selection 150V
300V
600V
Initial Value
(Factory-set
Value)
300V
IM 77C01E01-01E
2-5
Chapter 3 Parameter Setting Operations
3.1 Basic Parameter Setting Operations
NOTE
Set parameters only after setting the phase and wire system and the voltage range. If you change the
phase and wire system or voltage range after setting a parameter, the parameter will be initialized (to
a factory-set value). Parameters related to RS-485 and Ethernet communications will not be initialized, however.
Methods of Changing Parameter Setpoints
Four setting types - integral numeric value, fixed-point numeric value, floating-point numeric value, and
selection - have been defined for the parameters of the PR300. For each setting type, the following
explains basic operations used to set parameters.
Integral numeric value or fixed-point numeric value
Current value
Setpoint
3
Parameter Setting Operations
To re-set the parameter:
Using or ,
change the numeric
value.
123
To move to the digit to be
changed, use the following keys:
To the left
To the right
After changing the
numeric value, press
once.
This causes all digits of the
setpoint to start blinking.
Floating-point numeric value
Current value
Setpoint
Using , confirm the
number of decimal
places.
1
To move the decimal point, use
the following keys:
To the left
To the right
Using or ,
change the numeric
value.
234
To move to the digit to be
changed, use the following keys:
To the left
To the right
Selection
Current value
Setpoint
Change the setpoint using
or
.
123
After changing the
setpoint, press
once.
This causes all digits of the
setpoint to start blinking.
Press while all
digits of the setpoint are
blinking.
This confirms
the setpoint.
After changing the
numeric value, press
once.
This causes all digits of the
setpoint to start blinking.
Press while all
digits of the setpoint are
blinking.
This confirms
the setpoint.
Press any key other than
while all digits of the
setpoint are blinking. The
PR300 returns to the screen
in step
.
1
Press while all
digits of the setpoint are
blinking.
This confirms
the setpoint.
Key operations used
to set parameters
Moves from the Measured Value
screen to the Parameter screen
(hold down the key), or confirms
the setpoint.
Shows a parameter from the menu,
moves through the digits of a setpoint
(numeric value) to the right, or moves
the decimal point to the right.
Shows the next parameter or
menu item, or changes the
setpoint.
Shows the previous parameter or
menu item, or changes the
setpoint.
Returns from the Parameter screen
to the Menu screen, moves through
the digits of a setpoint (numeric
value) to the left, or moves the
decimal point to the left.
IM 77C01E01-01E
3-1
3.2 Setting the VT and CT Ratios
Operation
Setting the VT Ratio
This section explains how to set the VT ratio by taking as an example the case when the VT ratio is
changed from the initial value (1) to 4.
Operation
Measured Value screen
VT Ratio Setting screen
To move to the digit to be changed,
use the following keys:
To the left To the right
VT Ratio screen
VT Ratio Setting screen
Hold down for at
least 3 seconds.
1
The parameter (VT ratio)
appears.
Current value
Press once.
2
The screen changes to the one
for setting the parameter
and the alterable digit blinks.
Setpoint
Using or ,
3
change the setpoint.
VT Ratio Setting screen
VT Ratio screen
Press once to
blink the setpoint.
4
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.
Press once while
5
When proceeding to set the CT
ratio, press once and start
from step
Ratio.”
the setpoint is blinking.
The setpoint is confirmed and the
PR300 returns to the VT Ratio screen.
VT ratio setting completed.
To return to the Measured Value
screen, hold down .
If you do not operate any key for more
than 5 minutes on the Parameter
screen, the PR300 automatically
returns to the Measured Value screen.
3 in “Setting the CT
Parameter Setting Types and Ranges
Parameter Symbol Parameter Name
VT ratio
3-2
Setting
Type
Integral
numeric
value
Setting Range (Details)
1 to 6000
Initial value
(Factory-set
Value)
1
IM 77C01E01-01E