ALLIANCE POM100 User manual

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User Manual
Power Meter -
Din Rail, No Display
Model: POM100

Power Meter –POM100 User Manual v1
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Table of Contents
Notices...........................................................................................................................................3
Warnings .......................................................................................................................................3
Multi-Function Power Meter .......................................................................................................4
Specifications................................................................................................................................5
Installation –Mechanical...........................................................................................................12
Installation –Electrical ...............................................................................................................14
Warranty......................................................................................................................................22
Need help? ..................................................................................................................................22
Appendix –Modbus Communication Protocol.......................................................................23

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Notices
Please read this manual in full and
carefully observe the notes and
instructions before and during
installation, operation and
maintenance. The manufacturer cannot
be held liable for any damage which
occurs as a result of noncompliance
with this manual.
Do not tamper with device. Should
the device be tampered with in any
manner other than a procedure which
is described and specified in this
manual, the warranty is cancelled and
the manufacturer is exempt from
liability.
The product is designed exclusively
for the described application. Use of
this product in conditions not specified
in this manual or, contrary to the
instructions provided by the
manufacturer, is considered improper
handling of the product and will void
your warranty. The manufacturer will
not be held liable for any damages
resulting from improper use of the
product.
This manual should be read carefully by
relevant personnel and the end user.
This manual should be kept with the
product and be made available as
needed. Once you install or use the
product, you accept that you have
read, understood and complied with
this manual.
Compressed Air Alliance endeavours to
make the content of this manual
correct, but is not responsible for
omissions or errors and the
consequences caused. In case of any
doubts or questions regarding this
manual or the product, please contact
Compressed Air Alliance.
Warnings
Ignoring the warnings can lead to
serious injury and/or cause damage!
When handling, operating or carrying
out maintenance on this product,
personnel must employ safe working
practices and observe all local health &
safety requirements and regulations.
Improper operation or maintenance of
this product could be dangerous and
result in an accident causing damage to
machinery or injury or death.
The manufacturer cannot anticipate
every possible circumstance which may
represent a potential hazard. The
warnings in this manual cover the most
common potential hazards and are
therefore not all-inclusive. If the user
employs an operating procedure, an
item of equipment or a method of
working which is not specifically
recommended by the manufacturer
they must ensure that the product will
not be damaged or made unsafe and
that there is no risk to persons or
property.
NEVER CHANGE ORIGINAL
COMPONENTS WITH ALTERNATIVES.

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Multi-Function Power Meter
This multi-function three phase
power meter with Modbus/RTU
output is simple to install and easy to
configure directly into a remote
display or into your data acquisition
system.
The power meter can be installed on
mains supply or can be used for sub
metering individual equipment or sub
loads.
The POM100 power meter is best
suited to
•3 phase or single phase
measurements
•Where no display is required
•Permanent installations
Why should you monitor
power?
Monitoring power can help you:
•Reduce operating and energy
costs
•Improve understanding of energy
usage (eg spikes, variation,
usage)
•Identify phase and voltage issues
•Identify power factor and
harmonic issues
•Compare and challenge your
energy bill
•Improve efficiency and reduce
waste
•Monitor your mains power
supply usage and quality
•Monitor individual equipment
usage or sub system loads
Key Features
•Measure voltage, amps,
kilowatts, power factor, kilowatt
hours, kilovolt Amps (kVa) and
harmonics
•DIN rail mounting
•Modbus/RTU output
•Easy to install rogowski coil
current transducers
•Can be installed on mains supply
•Can be used for sub metering
individual equipment or sub
loads
Installation Requirements
Installing power meters is not difficult
but should be done by suitably
qualified and experienced
technicians. Some knowledge of
MODBUS communications is required
to connect the power meters to your
network.

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Power Meter –POM100 User Manual v1
Specifications
Power Meter Specifications
Power Meter Details
Type
Multi-function power meter
Applications
Power analysis
Energy meter
Mounting
Din Rail
Poles description
3PH4W 3PH3W
1PH2W (L-N) 1PH2W (L-L) 1PH3W (L-L-N)
Display
N/A (no display)
Available clamp sensors
Rogowski coil - 500A or 1,000A or 3,000A
Sampling rate
8,000 samples per second
Harmonic
52th Max
Dimensions
122 mm L x 87 mm W x 23 mm D
4.8” L x 3.4” W x 0.9” D
Weight
125 grams
Colour
White
Installation Type
Permanent installation or temporary installation
Contractual warranty
12 months
Measurement Ranges
Measured voltage
80V to 400V AC or 100V to 500V AC
Frequency
50/60Hz
Accuracy
Note: The accuracy of
the power meter is
affected by the quality of
installation. On-site
Current
0.5% from 1% to 120%
(manufacturer doesn’t ensure
accuracy when <10A)
Rated current
500A (0.5% from 10A to 600A)
3,000A (0.5% from 30A to 3600A)
10kA (0.5% from 100A to 12kA)

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conditions such as oil,
high humidity or other
impurities can also affect
the accuracy of the
power meter
Rogowski coil
specification
85mV/kA@50Hz±0.5%
Voltage
0.2% from 80V to 400V
(or 100V to 500V)
Power factor
±0.005 from 10% to 120%
Active/Apparent
Power
IEC62053-22 Class 0.5
Reactive power
IEC62053-21 Class 2
Frequency
0.01% from 45 to 65Hz
Active energy
IEC62053-22 Class 0.5s
Reactive energy
IEC62053-21 Class 2
Power
Power supply
85 to 264VAC / 100 to 370VDC, 3.5W
Or 24VDC
Input
Input type
External CT (333mV only) or External Rogowski coil
Primary current range
Adjustable from 0.1A to 9999A
Measurement input
range
1/225mV to 333mV
Permissible overload
600mV for 10s/hours
Output
Output parameters
Voltage, Amps and Kilowatts for each phase, power
factor, reactive power (kVa), total Kilowatts, Kilowatt
hours and electrical system harmonics
Connection
Screw terminals:
2.5mm2
0.1”
Interval:
5.08mm
0.2”
Relay
1 × digital output (2 ports) from 1pcs relay, rated
24V/800mA, 75mΩ
max
2.5kVrms insulation (controlled by Modbus)

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Maximum Switching Power:
0.5A, 125VAC
1A, 30VDC
Optical coupler
Max voltage: 80VDC
Max current: 50mA
Recommend Current: 10mA
Environmental Conditions
Operating temperature
-25°C to +55°C
-13°F to +131°F
Storage temperature
-40℃to +85℃
-40°F to +185°F
Humidity rating
5% to 95% RH at 50℃ (non-condensing)
Pollution degree
2: Normally only nonconductive pollution occurs.
Temporary conductivity caused by condensation is to
be expected.
Overvoltage category
III, for distribution systems up to 277/480VAC
Dielectric withstand
As per IEC61010-1, Doubled insulated front panel
display
Altitude
3000m Max
IP degree of protection
IP20 conforming to IEC 60629
Alarm
Setting
Voltage and current, each phase, AVG
Output form
Relay
Instantaneous rms Values
Voltage
U, UTH2, UTH3, UTH4 (Per Phase, AVG)
Current
I, ITHD2, ITHD3, ITHD4 (Per Phase, AVG)
Power
P, Q, S, PF (Per Phase, SUM)
Energy
EP, EQ, ES, Freq (Per Phase, SUM)
Over 1 x 109 kWh, value resets
UTHD (%)
UTHD, THD2, THD3, THD4 (Per Phase, AVG)
ITHD (%)
ITHD, THD2, THD3, THD4 (Per Phase, AVG)
PF
PFa, PFb, PFc, AVG

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Update Rate
Data acquisition rate
400ms
Calibration
Current
Per phase, all
Voltage
Per phase, all
Power factor
Per phase, all
Energy
Reset to “0” EP, EQ, ES all phase
EMC
Electrostatic discharge
Level IV (IEC61000-4-2)
Immunity to radiated
fields
Level III (IEC61000-4-3)
Immunity to fast
transients
Level IV (IEC61000-4-4)
Immunity to surge
Level IV (IEC61000-4-5)
Conducted immunity
Level III (IEC61000-4-6)
Immunity to power
frequency magnetic
fields
0.5mT (IEC61000-4-8)
Conducted and radiated
emissions
Class B (EN55022)
Standard compliance
EN 62052-11, EN61557-12, EN 62053-21, EN 62053-22, EN 62053-23, EN 50470-1,
EN 50470-3, EN 61010-1, EN 61010-2, EN 61010-031
Modbus RS485
Communication
Transmission mode
RS485 port, Half duplex

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RS485 link
3 wires
Communication protocol
MODBUS RTU
Settings
Communication address
1 to 247 (default 1)
Baud rate
1200 to 57600 baud (default 19200)
Parity
Even, Odd, None (default)
Data Bit
8
Stop bit
1
Power Meter Dimensions
87 mm
3.4”

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Rogowski Coil Specifications
500 Amps
1,000 Amps
3,000 Amp
Coil Length
200 mm or 7.87”
350 mm or 13.78”
510 mm or 20.08”
Window Size
50 mm or 1.97”
100 mm or 3.94”
150 mm or 5.91”
Ratio
Calibrated:
85mV / kA@50Hz / 100mV / kA@50Hz
Uncalibrated:
110mV / kA@50Hz
Read Accuracy
Calibrated:
<0.5% (central position, 25℃)
Uncalibrated:
< 5% tolerance (central position, 25℃)
Maximum Current
Measurable
100kA
Coil Resistance
from 100 to 250 Ω
Position Error
±1% maximum
Phase error
≤0.5°
Shielded
00% coil, 100% output cable
Couplings
PA6 UL 94 V-O rated
Voltage Insulation
Coil: 3000V
Signal cable: 1000V
Compliance
LVD EN 61010-1:2010
EMC EN 61326-1:2013
Safety
1000V CATIII ,600V CATIV
Materials
Coil & cable: Thermoplastic rubber, flame retardant UL 94
V-0 rated
Lead Length
5 meters
Operation
Temperature
-20℃to +70℃
-4°F to 158°F
Storage Temperature
-30℃to +90℃
-22°F to 194°F
Installation Type
Temporary or permanent installation
Warranty
12 months

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Rogowski Coil Position Sensitivity
Rogowski Coil Dimensions
500 Amps
1,000 Amps
3,000 Amp
A
Windows size A
50 mm
105 mm
155 mm
B
Windows size B
60 mm
100 mm
150 mm
C
Coil Outer Diameter
66 mm
121 mm
171 mm
D
Coil section
8 mm
E
Lead Cable Total Length
5 meters
F
Coil length
200 mm
350 mm
510 mm
Conductor Position
Typical Error (%)
•Adjacent to the center of coil
0.2%
•Adjacent to the inside coil
＜1%
21 mm
0.8”
5 mm
0.2”
20 mm
0.8”
10 mm
0.4”

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Installation –Mechanical
WARNING! Risk of electrical shock.
Any contact with energised parts of the product, may lead to an electrical
shock which can lead to serious injuries or even death. The user shall take
all measures necessary to protect against electrical shock.
Notes
•Users should be suitably qualified, licensed and experienced to install, operate,
maintain and remove this product.
•Please observe local and national regulations before/during installation and
operation.
•Before installing the product, make sure it is rated for your system (refer
to the “Specifications” section).
oUse of the product outside specified ranges or operating parameters can
lead to malfunctions and may damage the product or system.
•The system must be disconnected from any power supply during maintenance
work.
•Certain parts of the product may carry hazardous live voltage (e.g. primary
conductor). The user shall take all measures necessary to protect against
electrical shock. A protective enclosure or additional insulation barrier may be
necessary.
•Do not use this product in explosive areas.
•Do not stress the Rogowski Coils by applying any kind of mechanical force (i.e.
twisting, puncturing, excessive pressure, tight bending, etc.) as this will
dramatically degrade the device’s accuracy.
•Do not disassemble the product.
•The product must be installed properly, otherwise it may lead to inaccurate
measurement values.
•The product should be maintained and checked for faulty wiring on a regular
basis.
•Incorrect installation can damage the product, cause it to work incorrectly or
result in injury or death.

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Installation and maintenance shall be done with the main power supply
disconnected. Local and national regulations must be fully observed.
Step 1 –Locate clip on the Rogowski Coil base unit
Step 2 –Unscrew clip and pull out coil from base unit
Step 3 –Place coil over conductor, ensuring arrow faces toward the load
Step 4 –Insert coil back into base unit and screw clip to secure the coil

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Installation –Electrical
WARNING! Risk of electrical shock
Incorrect wiring or contact with energised parts of the product, may lead to
an electrical shock which can lead to serious injuries or even death. The
user shall take all measures necessary to protect against electrical shock.
Notes:
•Always check the wires to make sure they are wired correctly.
•Consider all local and national safety requirements and regulations for electrical
installations.
•The system must be disconnected from any power supply during
installation and maintenance work.
•Any electrical work on the system is only allowed by authorised and qualified
personal.

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Port Definition
Port
Number
Port
Name
Port Function
Remarks
1
IA+
A-phase current input positive
A-phase
current
Current (I)
Input
2
IA-
A-phase current input negative
3
IB+
B-phase current input positive
B-phase
current
4
IB-
B-phase current input negative
5
IC+
C-phase current input positive
C-phase
current
6
IC-
C-phase current input negative
7
N/A
Option
Option
8
N/A
Option
9
N/A
Option
10
UN
N-phase voltage input
Voltage (U) Input
11
UC
C-phase voltage input
12
UB
B-phase voltage input

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Port
Number
Port
Name
Port Function
Remarks
13
UA
A-phase voltage input
14
N/A
Option
Option
15
N/A
Option
16
N/A
Option
17
N/A
Option
18
A
RS485 A (Data +)
RS485 communication
19
B
RS485 B (Data -)
20
GND
RS485 Ground (Shield)
21
OP+
Coupler output +
Coupler output
22
OP-
Coupler output -
23
RCOM
Relay output -
Relay output
24
RO1
Relay output +
25
V-
Power supply –(0V DC)
Power
85 to 265 V AC/DC or
24V DC
26
V+
Power supply + (24VDC)

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Wiring Diagrams
WARNING:Incorrect wiring and installation can cause an electric shock,
electrocution or damage to the power meter or other equipment. It may
also void the warranty.
Before installing the power meter, make sure it is rated for your system (refer to
Specification section).
Notes:
Rcoil*：Rogowski coil secondary output voltage can not be over 333mV rms.
CT^：CT must be voltage output, secondary output can not be over 333mV rms.
Circuit breaker: 500mA fuses and disconnect switch
VT primary fuses and disconnect switch
Modbus Communication Wiring Diagram
GRD
485A
485B

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3PH4W no VT
3PH3W no VT
A
B
C
B
C
N
A

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3PH3W with VT
A
C
B

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1PH3W LL-N
1PH2W L-N
L
L
N
L
N