Saci AHM3-SMTP User manual

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AHM3-SMTP AHM3RC-SMTP
Multifunction Power Meter
User Manual
VER：V18A

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TABLE OF CONTENTS
1 SAFETY PRECAUTIONS......................................................................3
2 DESCRIPTION.........................................................................................3
GENERAL...................................................................................................3
MODULE.....................................................................................................3
MEASUREMENT..........................................................................................4
ENERGY.....................................................................................................6
HARMONIC.................................................................................................8
POWER QUALITY .......................................................................................9
DEMAND...................................................................................................11
MAX/MIN..................................................................................................12
MEMORY MODULE（DM1）...................................................................15
ANALOGUE INPUT MODULES（DM2，DM3，DM4）..........................15
ANALOGUE OUTPUT MODULE（DM5）.................................................16
COMMUNICATION.....................................................................................19
3 INSTALLATION .....................................................................................20
4 OPERATION ..........................................................................................24
DISPLAY...................................................................................................24
SETUP BUTTON........................................................................................25
SETUP MENU OVERVIEW ........................................................................26
PROGRAM EXAMPLE................................................................................36
5 COMMUNICATION ...............................................................................37
6 MAINTENANCE AND TROUBLESHOOTING .................................37
7 TECHNICAL SPECIFICATIONS.........................................................38

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1 Safety Precautions
The manufacturer shall not be held responsible for failure to comply with the
instructions in this manual.
The equipment must be installed and serviced only by qualified personnel.
Never work alone.
Prior to any work on or in the equipment,isolate the voltage inputs and
auxiliary power supplies，short the secondary of all CT, but never short the
secondary of PT.
Always use a properly rated voltage sensing device to conform that all power
is off.
Risk of damaging device
◆The voltage of the auxiliary power supply is beyond the rated range.
◆The frequency of the power distribution system is beyond the rated range.
◆The input polarity of the voltage or the current is wired improperly.
2 Description
General
This series multifunction power meters are designed to be used for the
measurement and calculation of electrical variables such as voltage, current,
frequency, power, power factor, energy, harmonic components,etc. in
low-voltage power distribution. It is capable of single-phase,two-phase,or
three-phase measurement and can be used in two-wire,three-wire,four-wire,
TN,TT,and IT systems.
Module
There are four interfaces on the meter for modules which are used to
extend functions. Please pay attention to the following points when installing
these modules.
a）Only one of communications modules （DM10-DM13）can be installed
onto meter ; Each module of DM11,DM12 and DM13 occupies two
interfaces;
b）Only one time memory module can be installed onto the meter;

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c）Up to four modules can be installed onto meter. Total width of all modules
is 4;
d）Modules of same type of different types can be installed onto meter in
compliance with the requirements of a）， b）and c）.
E.g. 1 Four DM2;
E.g. 2 Two DM2+one DM7+one DM10
E.g. 3 One DM6+one DM8+one DM11
type
description
type
description
DM1
Memory: 8MB,include RTC
DM8
2 relay outputs
DM2
2 analog inputs：mA
DM9
1 AC digital input
DM3
2 analog inputs：PT100
DM10
Profibus-DP V0
DM4
2 analog inputs：J, K , E or N
DM11
Ethernet :Modbus/TCP,
Web Server
DM5
2 analog outputs：mA
DM12
WIFI :Modbus/TCP
DM6
2 digital inputs and 2 digital
outputs
DM13
GPRS :Modbus/TCP, SMS
DM7
4 digital inputs
Measurement
- voltage
- current
- Load percent
- Power
- Power factor
- Frequency
- Demand
- Energy
- Total Harmonic Distortion
- Unbalance
- Up to 230/400V can be connected directly.Higher voltages using voltage
transforms.
- The ×/1Aor ×/5A current transformers can be used

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The following list shows variables which can be measured byAHM3 including
relative variables calculated from basic electrical parameters.
Measurement variable
Instant
Max
Min
Demand
sum
unit
V1/V2/V3
√
√
√
[V,kV]
V12/V23/V31
√
√
√
[V,kV]
I1/I2/I3
√
√
√
√
[A,kA]
F
√
√
√
[Hz]
P/P1/P2/P3
√
√
√
[kW,MW,GW]
Q/Q1/Q2/Q3
√
√
√
[kvar,Mvar,Gvar]
S/S1/S2/S3
√
√
√
[kVA,MVA,GVA]
PF/PF1/PF2/PF3
√
-
EP+/EP-
√
[kWh,MWh, GWh]
EQ1/EQ2/EQ3/EQ4
√
[kvarh,Mvarh，Gvarh]
Spare Energy
√
THDV1/THDV2/THDV3
√
[% ]
THDI1/THDI2/THDI3
√
[% ]
Harmonic RMS-U (1～63th)
√
[% ]
Harmonic RMS-I (1～63th)
√
[% ]
Unbalance-U
√
[% ]
Unbalance-I
√
[% ]
Hour meter
h:min
Measurement variable display example

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L-N Voltage 1.1
▲▼MENU SWITCH
V1 220.55
V2 220.55
V3 220.55
F50.000
V
V
V
Hz
Left picture shows instantaneous
three-phase voltage and frequency. Press
▲
or
▼
button to change to
other interfaces. Press
MENU
button
to return to main interface. Press
SWITCH
button to check corresponding
bar graph interface.
L-N Voltage1.1
▲▼MENU
V1
V2
V3
056%
056%
056%
200 50 100
SWITCH
Left picture shows bar graph of
three-phase voltage. Press
▲
or
▼
button to change to other
interfaces. Press
MENU
button to
return to main interface. Press
SWITCH
button to check corresponding measured
variable interface.
Energy
Meter supports excellent energy metering functions as follows：
·Bi-direction energy metering
·Four-quadrant reactive energy metering
·Tariff energy metering (TOU)
·Spare energy metering
All the values of energy are calculated on the basis of secondary value,
minimum resolution of which is 1Wh of 1varh. Provided the external PT or CT
is connected, the value of primary energy increases or decreases by
1Wh(1varh) multiple rate.
The maximum value of saved secondary energy is 2147483647 Wh, and the
maximum value of displayed primary energy is 99999999999 kWh (99.9
billion kilowatt). Users can manually reset the energy data as per the specific
needs.
Spare Energy
Signal coming from a Generator. when the main line is cut off and a
generator gives the power to the installation. The meters must measure and

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display the additional 6 Energies and 2 hour meters.
Tariff Energy
Meter supports tariff energy metering of sixteen time zones at most. The
starting of a time zone is judged by meter according digital input status.
Total Import/Expo rt 2.1
▲▼MENU
+kWh
07521.369
-kWh
00000.000
+kvarh
03647.200
-kvarh
00000.000
Bi-direction energy
EP+= 7521.369kWh
EP- = 0kWh
EQ+ = 3647.2kvarh
EQ- = 0kvarh
Reactive Quadrant 2.2
▲▼MENU
Q1 kvarh
00567.500
Q2 kvarh
00000.000
Q3 kvarh
00000.000
Q4 kvarh
01785.600
Four-quadrant reactive energy
1st quadrant: Q1 = 567.5kvarh
2nd quadrant: Q2 =0kvarh
3rd quadrant: Q3 =0kvarh
4th quadrant: Q4 = 1785.6kvarh
Import Energy 2.5
▲▼MENU
kWh
07521.369
T
kWh
00500.000
T1
kWh
00300.000
T2
kWh
00000.000
T3
kWh
00000.000
T4
Tariff import energy
Total Energy(T) 7521.7kWh
Tariff #1 Energy(T1) 500kWh
Tariff #2 Energy(T2) 300kWh
Tariff #3 Energy(T3) 0kWh
Tariff #4 EnergyT4) 0kWh

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Hour Counters 2.13
▲▼MENU
EP+:
h16min
000027
EP-:
h10min
000000
Hour Counters
Energy Import (EP+): 27h16m
Energy Export (EP-) : 10m
Harmonic
Meter supports harmonic content of grid. Detailed functions are as
follows：
· Harmonic RMS ( 2-63th )
· Fundamental
· Bar graph
Total Harmonic3.1
▲▼MENU
2
3
THDU%
1
THDI%
010.5
015.5
008.5
009.5
006.5
003.5
THDV1=9.5%
THDV2=6.5%
THDV3=3.5%
THDI1=10.5%
THDI2=15.5%
THDI3=8.5%
Fundamental 3.2
▲▼MENU
V1F 221.5
V2F 222.7
V3F 223.7
V
V
V
Left picture shows voltage fundamental。

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Fundamental 3.3
▲▼MENU
I1F 105.5
I2F 100.7
I3F 110.7
A
A
A
Left picture shows current fundamental。
Har m o n i c R a t i o 3.4
▲▼
02
V2
03 04 05
00.0 06.0 00.0 00.0
MENU
V1 03.9 05.5 01.5 07.5
I1 06.7 03.5 00.0 03.5
V3 00.0 00.0 00.0 03.0
I3 00.0 00.0 00.0 02.0
I2 00.0 05.0 00.0 00.0
Left picture shows harmonic distortion
rate of three-phase voltage and current.
Har m o n i c S p e c t r u m (U )3.20
▲▼MENU
60
20
01
100
02 04 06 08 10
Bar graph of harmonic content of
three-phase voltage. Bar graph of each
harmonic shows V1, V2 and V3 from left
to right. Left picture shows
3th THDV3: 12%
5th THDV1: 24%
5th THDV2: 16%
8th THDV2: 11%
Power Quality
Meter supports monitoring and analyzing power quality of grid.
Measured parameters are as follows:
1）Waveform
Real-time display waveform of three-phase voltage and current.
Waveform, phase sequence and distortion can be judged directly.

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Waveforms(U)
▲▼MENU
4.1
1 2 3
Left picture shows real-time waveform of
three-phase voltage. "1,2,3" correspond
to "V1,V2,V3".
4.2
Waveforms(I)
▼MENU
▲
1 2 3
Left picture shows real-time waveform of
three-phase current. "1,2,3" correspond to
"I1,I2,I3".
2）Phase angle of voltage and current
Phase angle of voltage and current of each phase is displayed directly.
Phase angle of Phase A voltage is defaulted as 0°. Phase angle of other
signals are displayed as relative to Phase A voltage (Unit：°).
4.3Pha s e A ngle
▼MENU
▲
2
3
1059.4
179.3
229.5
000.0
119.9
240.0
φUφI
Phase angle of three-phase voltage and
three-phase current.
Unbalance

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Electrical parameters of three-phase system are divided into three
symmetrical components which are positive-sequence component,
negative-sequence component and zero-sequence component according to
symmetrical component method. The ratio of RMS values of
negative-sequence component and positive-sequence component is defined
as three-phase unbalance in the condition that power system is in normal
operation mode.
Unbalance(U) 4.4
▼MENU
▲
218.8
0.001
000.4
000.2
Uunb
V
V
V
%
Uo
Neg. Seq.
Pos. Seq.
Unbalance-U
Positive sequence value=218.8V
Negative sequence value=0.4V
Zero sequence value=0.2V
Voltage unbalance value=0.001%
Unbalance(I) 4.5
▼MENU
▲
3.999
0.001
0.005
0.002 A
A
A
%
Io
Neg. Seq.
Pos. Seq.
Iunb
Unbalance-I
Positive sequence value=3.999A
Negative sequence value=0.005A
Zero sequence value=0.002A
Current unbalance value=0.001%
Demand
Meter supports six independent demand recording channels which can
measure maximum demand value, present demand value and previous
demand value of three-phase current, total active power, total reactive power,
total apparent power.

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Max Demand 5.2
▲▼MENU
P3.650 kW
Q3.960 kvar
S5.385 kVA
Left picture shows maximum demand
value of three phase total active, reactive
and apparent power.
Current Period 5.3
▲▼MENU
I1 2.780 A
I2 3.600 A
I3 2.360 A
Left picture shows present demand value
of three-phase current.
PreviousPeriod5.6
▲▼MENU
P2.600 kW
Q3.700 kvar
S4.522 kVA
Left picture shows previous demand
value of three-phase total active,
reactive and apparent power.
Max/Min
When the measured value is maximum or minimum value at a moment,
meter will record this value in non-volatile memory. These maximum or
minimum values include three-phase voltage, line voltage, frequency,
three-phase current, three-phase and total active power, three-phase and
total reactive power, three-phase and total apparent power and total power
factor. Following list shows the operation method of checking instantaneous
value, maximum value and minimum value of three-phase voltage and
frequency.

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Max Value 6.1
▲▼MENU
V1 461.4
V2 639.2
V3 457.7
PF 1.000
V
V
V
Left picture shows maximum value of
three-phase voltage and frequency
Min Value 6.10
▲▼MENU
P1 00.00
P2 00.00
P3 00.00
P00.00
kW
kW
kW
kW
Left picture shows minimum value of
three-phase and total active power
Event
Meter supports recording information of power on, power off,
programming and energy clearance when it is equipped with DM1 module.
Each type of record includes total pieces and latest occurring time of the
event. These information are checked through display interface or read
through communication.
▲▼MENU
8.1
Power On Record
Num: 0032
Last Time: 14-09-20
09:52:33
Left picture shows “Power on record”
including 32 times of power on and latest
power on time.

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▲▼
8.2
Power Off Record
Num: 0032
LastTime:14-09-20
09:50:33
MENU
Left picture shows “Power off record”
including 32 times of power off and
latest power off time.
▲▼
8.3
Program Record
Num: 0012
LastTime:14-09-22
09:52:33
MENU
Left picture shows “Program record”
including 12 times of programming and
latest programming time.
▲▼
8.4
Clr Energy Record
Num: 0002
LastTime:14-09-19
08:50:00
MENU
Left picture shown “energy clearance
record”including 2 times of energy
clearance and latest energy clearance
time.
Device information
This interface shows the software version of meter and
connection of modules.

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MENU
Ver sion 9.1
X1: DM6.147A
X2: None
X3: None
X4: None
CPU: AHM3.1003
Left picture shows software version of
meter and module. None indicates that
there is no connection or wrong
connection to the interface.
Modules
Meter supports four interfaces for connecting extension modules.
Memory Module（DM1）
▲▼MENU
Mo dule X 1 7.2
Module DM1
14-09-20
10:50:50
This module provides time information
and supports data storage function. Left
picture shows time information.
Analogue Input Modules（DM2，DM3，DM4）
DM2 is used to measure 4~20mA signal. DM3 is used to measure PT100
signal. DM3 is used to measure J, K, E thermal couple signal. Display
interfaces of measured value are shown as follows:
▲▼MENU
Module X1 7. 2
Analog Inputs DM2
No.
01
02
Value
07.60 mA
18.20 mA
Left picture shows measured value of
analogue input.
First analogue input is 7.6mA;
Second analogue input is 18.2mA.

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▲▼MENU
Module X4 7. 5
PT100 DM3
No.
01
02
Value
075.5 ℃
027.6 ℃
Left picture show measured value of
PT100 thermal resistor.
First temperature is 75.5℃;
Second temperature is 27.6℃.
▲▼MENU
Module X1 7. 2
Thermocouple-J DM4
0763 ℃
No.
01
02
Value
0507 ℃
Left picture shows measured value of
thermal couple with graduation number J.
First temperature is 507℃;
Second temperature is 763℃.
Analogue Output Module（DM5）
Instantaneous electrical parameters are change into DC current signal
output through DM5 module. If this module is installed onto meter, relative
interface will be displayed. The current value shown in the interface is
theoretical value in present status.
Analogue output items and range are programmed through meter.
▲▼MENU
Module X1 7.2
Analog Outputs-DM5
No.
01
02
Value
04.00 mA
08.20 mA
Left picture shows theoretical value of
analogue output.
First analogue output value is 4mA;
second analogue output value is 8.2mA.

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Digital Input
Digital input adopts dry contact mode. There is internal power supply for
digital input so that there is no need for external power supply.
There are four working modes for digital input as follows：
1)State monitoring mode：It is used to monitor the state of breaker, the
position of handcart, etc. The state of digital inputs can be indicated locally or
read remotely through communication.
2)Pulse counter mode：Meter counts pulse numbers from input terminal.
Pulse counting adds one when meter receives one pulse.
3) Spare energy synchronization：Terminal status is used as synchronization
signal. Spare energy metering starts after meter received the signal. This
function is effective in DM9 module.
4)Tariff energy setting mode：This function is valid in DM7 module. Digital
input is used for setting tariffs. There are sixteen kinds of tariffs. Meter
accumulates energy of present period to corresponding tariff period. The
function is effective in DM7 module.
▲▼MENU
Mo dule X 1 7. 2
Digital Inputs-DM7
No.
04
Mode
State
Pulse
State
Status
Tariffs
03
01
00000056
02
Left picture shows working modes of four
digital input.
Digital input 1 is in tariff energy status;
Digital input 2 is in pulse counting status
with pulse number 56;
Digital input 3 is for Spare energy;
Digital input 4 is for check status, and
there is input signal.
Relay Output
Meter supports two relay outputs. More relay outputs are realized by
connecting DM8 module to meter.
The relay output has three working modes: Energy pulse、remote control
and alarm mode.
The relay output module (DM8) has two working modes: remote control and

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alarm mode.
Parameters like working mode, alarm item, limit value,time delay and
hysteresis should be set. The data format of limit value is the secondary
integer data.
1) Energy pulse output mode
Meter supports bi-directional active and reactive energy pulse output
function through relay output. Pulse frequency is smaller than 1Hz.
2) Remote control output mode
Receiving command PC or PLC through communication, the relay which
supports electric level manner or pulse manner can be in motion or be
released.
3) Alarm mode
High alarm indicates the relay acts in case of the measuring value more than
the alarm value, while low alarm indicates the relay acts in case of the
measuring value less than that alarm value. Only when all the terms spurring
the relay alarm do not work, the meter has been turned off power or any
software shields the alarm function, does the relay be released.
▲▼MENU
7. 1Relay Outputs
Relay Outputs
No.
01
02
Mode
E Pulse
Alarm
Status
FREE
Left picture shows working mode of relay
outputs of meter.
Relay output 1 is energy pulse mode;
Relay output 2 is alarm mode.
▲▼MENU
Mo d ule X1 7.2
Relay Outputs-DM8
No.
01
02
Mode
Alarm
Remote
Status
FREE
Left picture shows working mode of relay
outputs of module.
Relay output 1 is alarm mode;
Relay output 2 is remote control mode.

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Communication
This series power meter provides an RS-485 slave port and adopts
Modbus-RTU protocol. All devices are connected in a bus line by
twisted-conductor and shielded cable. Up to 32 stations can be connected
together in a segment.The cable at the start and end of a segment is
terminated with resistors.
One more communication is realized by connecting extension module to
meter. As for detailed information, please refer to user manual of DM10,
DM11, DM12 and DM13.

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3Installation
Dimensions
96
96 90
11 50.5
86.5
55
Mounting
1) Cut a hole in the panel measuring 91×91 mm2.
2) Take out the power meter and loosen the clips.
3) Insert the meter into the cutout from outside.
4) Insert the clips and fix the meter.Wiring