YOKOGAWA Power Series Plus IM 2493AAA-1 User manual

Users Power SeriesPlus
Manual
Power SeriesPlus
3 in 1 AC Current
Digital Switchboard Meter
IM 2493AAA-1
1
IM 2493AAA-1
Revision 1, October 1999

CONTENTS
TABLE OF CONTENTS
IM 2493AAA-1
1ST edition, October 1999
All Rights Reserved, Copyright 1999, Yokogawa Corporation of America 0
General Description .................................................................................................1
Specifications...........................................................................................................3
Configuration............................................................................................................4
Configuring the 2493 POWER SERIES Plus Meter............................................4
Keymap .....................................................................................................................6
Changing Settings....................................................................................................7
Changing the current transformer (ct) ratio setting ..........................................8
Changing the rolling average setting ...............................................................9
Changing the network address setting...........................................................10
Changing the baud rate setting......................................................................10
Analog Output Scaling...................................................................................11
Changing the Analog Output Settings............................................................12
Connection Diagrams ............................................................................................14
Mounting and Outline.....................................................................................15

1. GENERAL DESCRIPTION
1. GENERAL DESCRIPTION
IM 2493AAA-1 1
The Yokogawa Corporation of America POWER SERIES Plus digital
switchboard meters incorporate the latest DSP ASIC technology. The ASIC
circuitry, developed by Yokogawa, has created a family of user-friendly, field-
adjustable meters.
When ordering the 2493 meter, the following options are available:
•AC Measuring Function(s): Volts, Amps, Watts, VARs, Power Factor,
and/or Frequency.
•Input Range: 0-150V, 0-300V, 0-1 A, 0-5 A, 40-70 Hz, 300-500 Hz
•Wiring Configuration: 1P2W, 1P3W, 3P3W, 3P4W, 3P4W 2 ½ element
•Analog Output Type: 0 to 1mADC, 4 to 20 mADC, or none
•Power Supply: 120 VAC, 240 VAC, 24 VDC, 48 VDC or 125 VDC
•Communications: MODBUS comm., YCA-485 comm. or no comm.
The meter display and output scaling are completely field-adjustable from the
front panel. The meter does not need to be re-calibrated after adjusting the
display or the output scaling. There are no internal parts that the user needs to
service or adjust. When a POWER SERIES
Plus
meter leaves the factory it will be
calibrated to meet or exceed its published specifications.
SAFETY NOTE: There are no field-serviceable parts in the unit. If the unit
is disassembled for any reason both auxiliary power and all inputs must be
de-energized.
Limited Warranty
This meter has been delivered to you after strict quality control and inspection.
Yokogawa Corporation of America warrants its Equipment to meet applicable
specifications, if any, and to be free from defects in material and workmanship for
a period of one (1) year from date of shipment to the original Purchaser. Upon
receipt of prompt notice from Purchaser, referencing the order number and
detailing the claimed non-conformity or defect, Seller shall, at its option, repair or
replace the Equipment. Equipment returned to Seller will only be accepted with a
Returned Material Authorization (RMA) number issued by Seller or one of its
authorized representatives. Inbound shipping charges to Seller’s factory in
Newnan, Georgia, or other designated facility, are the responsibility of Purchaser.
Normal shipping charges for the return to Purchaser of repaired or replacement
Equipment shall be the responsibility of the Seller (North American points only).
Repair or replacement of the Equipment in the manner described above is the
exclusive warranty remedy and shall constitute complete fulfillment of all Seller’s
liabilities for breach of this warranty. The Seller assumes no responsibility
hereunder for any equipment damage or failure caused by improper installation,

1. GENERAL DESCRIPTION
IM 2493AAA-1 2
operation and maintenance of the Equipment, or normal wear and tear on
disposable or consumable parts. This warranty shall be void in the event of
unauthorized modification or servicing of the Equipment.
The foregoing warranty is exclusive and in lieu of any other warranties of
quality, whether expressed or implied (including any warranty of
merchantability or fitness for a particular purpose). In no event shall Seller
be liable hereunder for any special, indirect, incidental or consequential damages
including the loss of revenue or production.

2. SPECIFICATIONS
2. SPECIFICATIONS
IM 2493AAA-1 3
3 in 1 AC Current Specifications
PRODUCT FUNCTION: AC Amps, 3 Phases
ACCURACY: ±0.2% of Reading ±0.1% of Full Scale
DISPLAY UPDATE RATE: Channel A: 80 milliseconds
Channel B & C : 160 milliseconds
OPERATING TEMPERATURE RANGE: -20 to +60°Celsius
STORAGE TEMPERATURE RANGE: -40 to +85 °Celsius
INPUT RANGES: 0-1 Amp AC or 0-5 Amp AC
CURRENT TRANSFORMER
RATIO RANGE: 1:1 through 5000:1
ANALOG OUTPUTS (Optional): 0 – 1 mADC, ±10 VDC compliance
into 10 kΩ
4 – 20 mADC, 15 VDC compliance
into 750 Ω
ANALOG OUTPUT
RESPONSE RATE: within ±1% of final value within 1.0
second
ISOLATION:
Input/Output and Case: 2500 VAC
Output to Aux. Power: 2000 VAC or 500 DC for DC-powered
option
Aux. Power to Case: 2000 VAC or 500 DC for DC-powered
option
Output to Case: 1000 VAC

3. CONFIGURATION
3. CONFIGURATION
IM 2493AAA-1 4
CONFIGURING THE 2493 POWER SERIES Plus METER
The new triple-display POWER SERIES Plus can be configured for voltage and
current inputs from instrument transformers, as well as analog outputs, RS-485
network address and a rolling average display.
All set-up functions can be performed using the four push-buttons on the front
panel see below) or via RS-485 communications. You can also use the buttons
to display the minimum and maximum readings and to change the display from
phase to phase.
This button
starts all
operations.
When
viewing or
changing
settings it is
used to
back out of
a mode.
This button,
when
changing
settings, it
moves
between
settings or
between
digits.
This button
will
increment
the value
being
changed.
It is also
used to
display Max
readings.
This button,
when
changing
settings, is
used to
select a
mode, save
it, and then
move to the
next mode
in the
sequence.
It is also
used to
display Min
readings.
All button operations are begun with the Mode button.
To see the Min or Max, push the Mode button and then the button of the reading
you want to see – Min or Max. The values will display for ten (10) seconds
before reverting to the normal display. If you want to reset the values, push the
Min or Max button again before the 10 seconds has expired.
To view the configuration settings, press Mode twice (Mode – Mode) and then
press Set. The first setting – the Current Transformer (CT) ratio - will be
displayed.. To see the other settings, press Next. You can scroll through all the
settings by pressing Next. To go back to normal operations, press Mode. To
change the setting being shown, press Set. See the specific sections on the
following pages for details on how to change the settings. Once a setting is

3. CONFIGURATION
IM 2493AAA-1 5
changed it will advance to the next setting. At any point while changing settings,
pressing Mode will exit the mode without changing anything.

4. KEYMAP
4. KEYMAP
IM 2493AAA-1 6
This flowchart illustrates the operation of the POWER SERIES Plus meter using
the push-keys on the front panel.
This flowchart depicts the front panel key options when operating in normal reading
mode. The options are:
Mode-Mode – Invokes change setting menu (see flow chart page 7).
Mode – Next – Not applicable on A/A/A units.
Mode – Max – Displays Max Readings.
Mode – Min – Displays Min Readings.

5. CHANGING SETTINGS
5. CHANGING SETTINGS
IM 2493AAA-1 7
Note: This flowchart gives
information pertaining to units
equipped with YCA
communications option, or no
communications option. The
setup flow is slightly different
for units with MODBUS
communications option. See the
Power Series communications
manual (IM 249X-COMM) for
details.

5. CHANGING SETTINGS
IM 2493AAA-1 8
Changing the current Transformer (ct) ratio setting
When you reach the CT setting, the primary value will be displayed it the middle
row and the secondary value will be displayed in the bottom row. Press Set and
the first digit of the primary value will begin blinking. You can increment the
value of this digit by pressing Inc. Once a digit has reached 9 (nine) it will then
go to 0 (zero). To move to the next digit press Next. You can return to the first
digit by pressing Next while the last digit is blinking.
When you have the digits as you want them, press Set. The decimal point will
now be blinking. You can then move the decimal point to the right by pressing
Inc. Once it has reached the last position it will jump to the first position on the
next Inc.
Pressing Set again will bring you to the Multiplier (Kilo) setting. In the leftmost
digit you will see a blinking ‘ |- ‘ and if the multiplier light is on, it will also blink.
You can change the setting by pressing Inc.
If you have a 5 Amp unit, the next time you press Set the value of the secondary
will blink. To change the value, press Inc. There are only two choices: 1 or 5.
If you have a 1 Amp unit, or you have set the secondary on a 5 Amp unit,
pressing Set will now move you to the Confirm mode. All values will blink. If the
values are correct press Set one last time to save them and move on to the
Analog Output settings. Pressing Mode at this time or at any other step in the
process will restore the old CT settings.
The CT primary value can be set to any value between 1.000 and 25000 (5
Amps X 5000 ratio). If it is not in this range you get the error “ErrH” (Too High) or