YOKOGAWA POWERCERT PR300 Initial Setup

Startup
Model PR300
Manual
Power and Energy Meter
<Initial Setup Operations>
Thank you for purchasing the PR300.
This manual describes the setting procedures of phase and wire system,
voltage range, VT ratio, and CT ratio of the PR300. The electronic manual is
also provided in this manual. Read them along with this manual.
To ensure correct use, be sure to read the PR300 Power and Energy Meter
User's Manual (IM 77C01E01-01E) thoroughly before beginning operation.
Printed manuals
Model PR300 Power and Energy Meter Startup Manual <Installation> :
IM 77C01E01-02E
Model PR300 Power and Energy Meter Startup Manual <Initial Setup Operations> :
IM 77C01E01-03E (This manual)
Electronic manuals (PDF files)
Model PR300 Power and Energy Meter User's Manual :
IM 77C01E01-01E
Model PR300 Power and Energy Meter Communication Interface User's Manual:
IM 77C01E01-10E
You can download the latest manuals from the following website.
https://www.yokogawa.com/ns/pr300/im/
Please keep this manual for future reference.
IM 77C01E01-03E
2nd Edition: Sep. 2017 (YK)
Component Names and Functions
Demand Alarm lamp (Red)
Lights up if the demand value exceeds the demand alarm point at
any point in time other than the demand alarm mask time.
Pulse Output lamp (Green)
Lights up when the output is turned on in the pulse output
mode and goes out when the output is turned off.
Communication lamp (Green)
Blinks while RS-485 or Ethernet communi-
cation is in progress.
Power lamp (Green)
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.
Phase Indication lamps (Red)
Light up to tell for which phase the voltage or
current value is being measured.
MAX and MIN lamps (Red)
Light up when the maximum or minimum
measured value is displayed.
Operation keys
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, this key is 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.
1
Record the parameter settings of the PR300 on MEMO column in
Appendix 4, "Parameter List" of the user's manual (IM 77C01E01-01E).
Note that in the case of a failure, the parameter settings set to the failed
product cannot be restored.
Phase and Wire System lamps (Green)
The phase and wire system option set in the
PR300 lights up.
Input Range lamps (Green)
The voltage range option set in the PR300 and
the current range (rated input) option specified
at the time of ordering light up.
Measured Value display (Red)
Shows a measured value of power, energy, etc.
Also shows a parameter symbol and its setpoint
at the time of parameter setting.
Unit lamps (Red)
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.
DEMAND lamp (Red)
Lights up when the measured value of demand
power or demand current is displayed.
(Only supported for a PR300 with the demand
measuring function.)
This key is used to start or stop demand measure-
ment. The lamp (green) in the key lights up in the de-
mand measurement.
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.

1. Set up the PR300 First

NOTE
If you change the phase and wire system and the voltage range, all parameters other than those related to RS-485 and Ethernet communications are
initialized (to factory-set values). Change the phase and wire system and the voltage range before setting parameters such as the VT and CT ratios.
1.1 Setting the Phase and Wire System
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.
Startup screen
1
Turn on the PR300.
The PR300 shows the station number for about 5
seconds, then the Measured Value screen * appears.
Measured Value screen
2
Hold down for at least 3 seconds.
VT Ratio screen
The parameter (VT ratio) appears.
Simultaneously hold down
3
+
for at least 3 seconds.
Specification Change Confirmation screen
The Specification Change Confirmation screen appears.
4
Using or , show
the lower display.
Specification Change Confirmation screen
5
Press once.
Phase and Wire System screen
The Phase and Wire System screen appears.
Parameter symbol for
phase and wire system
Current value
6
Press once.
Phase and Wire System Setting screen
The Phase and Wire System Setting screen appears.
Setpoint
7
Using or , select the setpoint.
Phase and Wire System Setting screen
8
Press once to blink the setpoint.
Phase and Wire System Setting screen
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.
9
Press once while the setpoint is blinking.
The setpoint is confirmed and the PR300
Phase and Wire System screen
returns to the Phase and Wire System screen.
When proceeding to set the voltage range, start from Step
6
in Section 1.2, "Setting the Voltage Range," with this
screen (figure on the left) shown as is.
Current value
10
Hold down for at least 3 seconds.
Measured Value screen
The PR300 shows the Startup screen for about 5 seconds,
then the Measured Value screen appears.
Setting completed.
Note
•If single-phase three-wire system is selected, the voltage
range is fixed at 300V (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
on
phase and wire system cannot be changed.
Range of Phase and Wire System Options
Parameter Symbol Setting
Setting Range (Details)
Parameter Name Type
Selection Model and Suffix Codes
Phase and
Single-phase
wire system
two-wire system
Single-phase
three-wire system
Three-phase
three-wire system
Model and Suffix Codes
Single-phase
two-wire system
Single-phase
three-wire system
Three-phase
three-wire system
Three-phase
four-wire system
Model and Suffix Codes
Three-phase four-wire
system (2.5 element)
* The initial value of the Measured Value screen (display pattern) is Upper
display: Current (phase switch indication), Middle display: Voltage (phase
switch indication), and Lower display: Active power. For the display
pattern setting procedures, refer to the PR300 Power and Energy Meter
User's Manual (IM 77C01E01-01E).
Initial Value
(Factory-set
Value)
Three-phase
three-wire
system
Three-phase
four-wire
system
Three-phase
four-wire system
(2.5 element)