Acrel AMC Series Owner's manual

281
Manual of AMC Series intelligent power collection
and monitoring device
Installation and Operation Instruction V1.4
ACREL Co., Ltd.

DECLARATION
No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any
form by any means, electronic, mechanical photocopying, recording, or otherwise without prior
permission of Acrel. All rights reserved.
This company reserve power of revision of product specification described in this manual, without
notice. Before ordering, please consult local agent for the latest specification of product.

CONTENTS
1.General................................................................................................................................................................- 1 -
2.Type and specification of products................................................................................................................. - 1 -
3.Technical parameters........................................................................................................................................- 1 -
4.Installation wiring instructions..........................................................................................................................- 2 -
4.1 Outline and mounting cutout size........................................................................................................ - 2 -
4.2 Wiring method.........................................................................................................................................- 3 -
5.Operating instructions....................................................................................................................................... - 5 -
5.1 Explanation for keypad functionality................................................................................................... - 6 -
5.2 Display Example.....................................................................................................................................- 6 -
5.3 Programming menu............................................................................................................................. - 10 -
5.4 Programming example........................................................................................................................ - 11 -
6.Communication................................................................................................................................................ - 16 -
6.1 Communication address table(MODBUS-RTU)............................................................................. - 16 -
6.2 Communication application................................................................................................................ - 26 -
7.Common fault analysis................................................................................................................................... - 29 -

1.General
AMC series intelligent power collection and monitoring device is a smart meter designed for power
monitoring needs of power systems, industrial and mining enterprises, utilities, and intelligent buildings.
It integrates measurement of power parameters (such as single-phase or three-phase current, voltage,
and active power). Power, reactive power, apparent power, frequency, power factor) and power
monitoring and assessment management. At the same time, it has a variety of peripheral interface
functions for users to choose: with RS485 communication interface, MODBUS-RTU protocol can meet
the needs of communication network management; 4-20mA analog output can correspond to measured
electrical parameters, meet DCS Such interface requirements; with switch input and relay output can
realize the function of "remote signal" and "remote control" of circuit breaker switch. High-brightness
LED/LCD display interface, parameter setting and control through buttons, ideal for real-time power
monitoring systems. Can directly replace conventional power transmitters and measuring instruments.
As an intelligent, digital front-end acquisition component, the instrument has been widely used in various
control systems, SCADA systems and energy management systems.
2.Type and specification of products
Meter type
Basic function
Optional function
Co-selection
function
AMC72-E4/KC
AMC72L-E4/KC
Three phase voltage, Zero sequence
voltage,Three phase current, Zero sequence
current,Three phase active power, Total
active power,Three phase reactive power,
Total reactive power,Three phase apparent
power, Total apparent power,Three phase
Power factor, Total power factor,Frequency,
Voltage phase angle, Voltage and current
imbalance,Forward and reverse power, Four
quadrant energy metering,System time
display,1 channel RS485 interface /
Modbus-RTU protocol and the statute
DLT645.
①2DI+2DO+1Ep(K)
②4DI+2DO(K)
③Event record (SOE) +
Extreme value
④Total harmonic
measurement (H)
①③④
②③④
AMC96-E3/KC
AMC96L-E3/KC
①4DI+2DO+1Ep(K)
②2DI+2DO+1Ep(K)
③Event record (SOE) +
Extreme value
④2-31th harmonic
measurement (H)
⑤2-channel analog output
(M)
①③④
②③④⑤
AMC96-E4/KC
AMC96L-E4/KC
Note:
1.DI--Switching input, DO--Switching output, M--Analog output, SOE--Event recording, H--Harmonic
measurement, Ep--Electric energy pulse
2.When the digital tube is displayed, the harmonic data is not displayed, and the data is read only by
communication.
3.K is a required function，Choose from ①②
4.When Event record (SOE) is selected,Extreme value and maximum demand（D）are available at the
same time.
3. Technical parameters
Technical parameters
Value
Input
Connection
3-phase-3-wire, 3-phase-4-wire
Frequency
45-65Hz

Voltage
Rating: AC 100V、400V
Overload:1.2 fold rating {continuous) : 2 fold rating for 1 second
Power consumption:< 0.5VA
Current
Rating: AC IA、5A
Overload:1.2 fold rating(continuous);10fold rating for 1 second
Power consumption:< 0.5VA
Output
Electric energy
Output mode:open-collector photo-coupler pulse
Pulse constant: 10000 , 40000, 160000 imp/kWh
Communication
RS485port, Modbus -RTU protocol,baud rate 1200 ~ 38400
Function
Switching input
2channel or 4channel passive dry contact input mode
Switching output
Output mode:2 channel relay NO contact output
Contact capacity: AC 250V/3A、DC 30V/3A
Analog output
Output mode:0-5V,0 - 20mA,4 - 20mA programmable
Accuracy class
Frequency:0.05Hz,Current、Voltage:0.2 class,Reactive
power:l .0class,Reactive Electric energy:l .0class,other:0.5class,2-31th
harmonic measurement:±1%
Power supply
AC/DC 85-265V
power consumption≤10VA
Security
Power frequency
withstand voltage
Between Power supply//Switching Output// Current Input//voltage Input and
Transmitting// Communication //Pulse Output//switching input AC 2 kV 1min;
Between Power supply、switching output、Current Input、voltage Input AC
2 kV 1min;
Between Transmitting、Communication、Pulse Output、switching input AC
1kV 1 min;
Insulation
resistance
Input、Output end to machine enclosure >100MΩ
Environment
Temperature
work: -10°C~+55°C storage: -25°C ~+75°C
Humidity
≤93%RH Non-condensing
Altitude
≤2500m
4.Installation wiring instructions
4.1 Outline and mounting cutout size
Outline
unit ：mm
faceplate size
housing size
cutout size
width
height
width
height
depth
width
height
72 square
75
75
66.5
66.5
94.3
67
67
96 square
96
96
90
90
77.8
92
92

Figure 1 AMC72 appearance size
Figure 2 AMC96 appearance size
Figure 3 AMC72 installation dimensions
Figure 4 AMC96 installation dimensions
4.2 Wiring method
According to varied design requirements, power and voltage input terminals are recommended with
fuse(BS88 1A gG) to meet with the safety performance requirements of prevailing electric codes.

4.2.1 Instrument terminal block and wiring method
Figure 5 AMC72 series terminal block diagram
Note: Switching input: 32 - DI3, 33 - DI4; pulse output: 32 - E +, 33 - E-.
Figure 6 AMC96 series terminal block diagram
Note: Switching input: 32 — — DI3, 33 — — DI4, 38 — — COM3; pulse output: 32 — — AO1,33 — —
AO2,38——COM3.
4.2.2 Instrument signal terminal wiring method
Signal terminal: "4,5,6,7,8,9" is the terminal number of the current input; "11,12,13,14" is the
terminal number of the voltage input.

A
B
C
N
UAUBUCUNIA
*IAIB *IBIC *IC
FUSES
A
B
C
N
UAUBUCUNIA
*IAIB *IBIC *IC
FUSES
A
B
C
UAUBUCUNIA
*IAIB *IBIC *IC
FUSES
three-phase four-wire 3CT three-phase four-wire 3PT、3CT
three-phase three-wire 2PT、2CT
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2
S1 S2
* * * * * *
* * *
*
*
*
*
*
*
*
*
A
B
C
UAUBUCUNIA
*IAIB *IBIC *IC
FUSES
S1 S2
S1 S2
* * *
*
*
11 12 13 14 4 5 6 7 8 9
11 12 13 14 4 5 6 7 8 9 11 12 13 14 4 5 6 7 8 9
11 12 13 14 4 5 6 7 8 9
three-phase three-wire 2CT
Figure 7 Schematic diagram of instrument signal wiring
Note: is the test terminal for short circuit of CT secondary side.
An example of wiring for the communication part is shown below:
Correct wiring method: the communication cable shield is connected to the earth.
It is recommended to add a matching resistor between A and B of the end meter, and the resistance
range is 120Ω~10 kΩ.
5. Operating instructions
SET
Figure 9 LED front panel Figure 10 LCD front pane

5.1 Explanation for keypad functionality
Four keys of AMC series intelligent power collection and monitoring device separately indicate SET
key, LEFT key, RIGHT key, ENTER key from left to right.
Panel key category
Key Function
SET key ( )
Under measurement mode, Press This key enter
programming mode, meters hint Input password PASS, after
Input correct password, set up meters programming;
Under programming mode, used for Return to previous
menu。
Left key( )
Under measurement mode, used for switching Display item;
Under programming mode, used for switching same class
menu or ones place reduced。
Right key( )
Under measurement mode, used for switching Display item;
Under programming mode, used for switching same class
menu or ones place increase。
ENTER key( )
Under measurement mode, when Displaying Electric energy
data, press This key can look over time sharing multi-rate
Electric energy(if any);
Programming mode, used for menu item selection confirm
and parameter revision confirm。
Left key+ENTER
key( + )
Programming mode, this key combination is used for the
reduction of hundreds of digits.
Right key+ENTER
key( + )
Programming mode, this key combination is used to
increase the hundred digits.
Note: When using the combination key, you can hold down the Left and Right key and then press
the Enter key.
5.2 Display Example
5.2.1 The operation steps to view power parameters are shown in Figure 11.

total harmonic di stortion of the current
current
P、 Q、 λ
abso rp tiv e activ e ele ctric ene rgy
re lea se a c tive electric en e rgy
indu ctive re a ctive e lec tric e n ergy
cap a citiv e re ac tive ele ctric ene rgy
F、 2DI2DO 4DI2DO
pahse voltage line voltage total harmo nic disto rtion of the Voltage
V1
1
P
V2
2
Q
V3
3
λk
M
V1
1
P
V2
2
Q
V3
3
λk
M
V1
1
P
V2
2
Q
V3
3
λk
M
V1
1
P
V2
2
Q
V3
3
λk
M
V1
1
P
V2
2
Q
V3
3
λk
M
V1
1
P
V2
2
Q
V3
3
λk
M
V1
1
P
V2
2
Q
V3
3
λk
M
V1
1
P
V2
2
Q
V3
3
λk
M
V1
1
P
V2
2
Q
V3
3
λk
M
V1
1
P
V2
2
Q
V3
3
λk
M
V1
1
P
V2
2
Q
V3
3
λk
M
V1
1
P
V2
2
Q
V3
3
λk
M
V1
1
P
V2
2
Q
V3
3
λk
M
V1
1
P
V2
2
Q
V3
3
λk
M
frequency
The k indicator light is on, indicating that the unit of electric energy is kWh. When reading the
electric energy, the second row of digital tubes and the third row of digital tubes are continuous,
as shown in the figure on the left, the electric energy is 123456.78kWh;
Similarly, the M indicator lights up to MkWh.
three p hase pow er factor
Figure 11

5.2.2 The steps to view the event record of AMC72/96 are shown in Figure 12.
Figure 12
Note: The event record (SOE) can be viewed by pressing the SET key on any interface.
5.2.3 The steps for viewing various types of power parameters of the AMC72L/96L are shown in Figure
13.
Figure 13.
Note: The SET key can be used to switch various types of data,event record (SOE) and extreme value
data exist only when SOE function is selected.
5.2.4 View the power parameters of the AMC72L/96L as shown in Figure 14.
Figure 14
Note: If the meter has an event record (SOE) function, the date and time interface is displayed.

5.2.5 View the harmonic parameters of the AMC72L/96L meter as shown in Figure 15.
Figure 15.
Note: Only the 96 shape has the function of fractional harmonics; press the left and right buttons to
switch the harmonic content of 2-31 times.
5.2.6 View the power parameters of the AMC72L/96L as shown in Figure 16.
Figure 16
5.2.7 View the AMC72L/96L event record parameters as shown in Figure 17.
Figure 17.
5.2.8 View the extreme value parameters of the AMC72L/96L as shown in Figure 18.
Figure 18
Note: There are no interface voltage maximum value and phase voltage minimum value interface for

three-phase three-wire.
5.3 Programming menu
5.3.1 Meter general programming menu
First menu
Second menu
Tertiary menu
Description
Start-up display selection: 0-automatic
page turning; other page numbers
correspond to the current meter model
power parameter interface.
0～9999
Password setting (Initial password 0001)
Press ENTER key Electric energy clear
Press Enter key, clear demand record
Press Enter key, clear demand record
E1/E2
Primary(EI) or secondary(E2) energy
display option,The default is E1.
1.6-160.0
Constant of Energy plus(e.g:10.0-
10000imp/kWh)
EP/EQ
Active pulse (EP), reactive pulse (EQ)
switching, default active pulse
3P3L、3P4L
Connection
mode(Three-phase-three-wire
Three-phase-four-wire)
100V、400V、660V
Input voltage range
1A、5A
Input current range
0～9999
Voltage ratio
0～9999
Current ratio
1～247
Communication address
1200、2400、4800、
9600、19200、38400
Communication baud rate
None/2bit/odd/even
Communication data mode

000000000001～
999999999999
645 Protocol Communication Address
See 5.4.2 for
details.
Analog output item selection
4～20mA Or 0～
20mA
Output range
-9999～9999
High change value setting
-9999～9999
Low change value setting
See 5.4.3for details.
Alarm item selection
0000～9999
Alarm delay or remote control delay
0000～9999
Hysteresis setting
-9999～9999
High alarm value setting
-9999～9999
Low alarm value setting
Whether low alarm is allowed when the
signal is 0
Year
Month,day
Set current time
Time
Minutes, seconds
Meter version number and number
5.3.2 LCD display instrument backlight control menu
First menu
Second menu
Tertiary menu
Description
0-9999
When set to 0, the
backlight is always on.
When set to 1-9999, the
backlight is off after
1-9999 seconds.
5.4 Programming example
The programming example use flow chart to introduce how to change some options of programming
menu such as current times, transducer setting etc.

Note: After completing setting or selecting, press ENTER button to confirm, after confirming,
pressing SET key until SAVE/YES page appear, now, the ENTER button must be pressed to
confirm, otherwise, the setting is invalid.
5.4.1 How to modify the current ratio
For example: the signal is 1000A/5A meter, the ratio setting is shown in Figure 19.
Figure 19
5.4.2 How to modify the analog output settings(Only AMC96 instrument supports analog output
function)
For example: set the line voltage Uab to correspond to the first analog 0-20mA output at 19-381V，
The settings are shown in Figure 20.
Figure 20

First channel analog output
Analog output item selection
00
01
02
03
04
05
06
07
UA
UB
UC
UAB
UBC
UCA
IA
IB
08
09
10
11
12
13
14
15
IC
PA
PB
PC
Psum
QA
QB
QC
16
17
18
19
20
21
22
23
Qsum
SA
SB
SC
Ssum
PFA
PFB
PFC
24
25
PF
F
4～20mA Or 0～20mA
When the analog output is 20mA, the corresponding electrical parameter is taken as the
highest four-digit integer (the decimal point is ignored) and the last bit is zero.
Similar to Ao.Hi
Note: The analog output setting includes the analog output selection, the analog output full scale
corresponding value and the analog output zero corresponding value.
The analog output selects different values for different signals, and refers to the analog output item
selection. The analog output full scale corresponds to the signal primary side value, that is, the 20 mA
output corresponds to the displayed value of the power, and the highest four-digit integer (the decimal
point is ignored) is less than 0. If the input is 220V, 100A/5A, three-phase three-wire, the total power is
220kV×100A×
3
=38.10kW, the output type is 4-20mA; if 100% total power, the first analog output is
20mA, 0% total power The first analog output 4mA, the first analog output selection (register address
0005H) is set to 12, the first output fullness corresponding value (register address 0006H) can be set to
38.10; the first output zero corresponding value (Register address 0007H) can be set to 0.
5.4.3 Switching/Relay alarm output setting
For example: when the total active power is lower than 3.3kW or higher than 66kW, the first alarm
will act after 10 seconds,and Hysteresis setting is 1kW. When the power is 0, the alarm is allowed. The
setting is shown in Figure 21.

Figure 21

The first switching/relay alarm output
Alarm item setting
00
01
02
03
04
05
06
07
Remote control
UA
UB
UC
Three-phase
phase voltage
maximum value
UAB
UBC
UCA
08
09
10
11
12
13
14
hree-phase line
voltage maximum
value
IA
IB
IC
Three-phase
current
maximum value
PA
PB
15
16
17
18
19
20
21
22
23
PC
Psum
QA
QB
QC
Qsum
SA
SB
SC
24
25
26
27
28
29
30
31
Ssum
PFA
PFB
PFC
PF
F
Voltage
imbalance
Current
imbalance
32
33
34
DI1(Linkage)
DI2(Linkage)
FL（Combined alarm）
The corresponding channel "In.=0" needs to be set to "Lo.on"
The second way DO can
be set
When the alarm item SEL is 00 (remote control), DLY indicates the duration after the
switching amount is activated.
When the alarm item SEL is not 00 (alarm), DLY indicates the delay time before the
switching action.
Hysteresis setting
High alarm value setting (do not set the maximum 9999)
Low alarm value setting (do not set minimum -9999)
Whether low alarm is allowed when the signal is 0, Lo.on is enabled, Lo.of is forbidden
Note:
1. Hysteresis setting, high alarm value setting and low alarm value setting correspond to the display
value of the battery, and the display contains a decimal point.e.g. input 220V 100A/5A, three phase four
wire, 100% P total as 220*100*3=66kW, e.g. 100% power high alarm, "AL.Hi" taken as 66.00; 100%
voltage high alarm, "AL.Hi" taken as 220.0; 100% current high alarm, "AL.Hi" taken as 100.0
2.Indication of three phase XX maximum/minimum value: high alarm represents maximum value of
three phase; low alarm represents minimum value of three phase
3.Secondary DO to be set as "34.FL" combination alarm function; after setting, level II menu
changed as "SEL" (function selection), "dLy" (delay), "H-U" (high voltage), "L-U" (low voltage), "H-F"
(high frequency), "L-F" (low frequency), "H-P" (high frequency), "L-P" (low frequency), "H-I" (high
current), "L-PF" (low power factor), " H-b.U " (over voltage unbalance, set as -1 phase miss, judgment
condition at least one phase>0.5Ue, at least one phase<0.1Ue), " H-b.I " (over current unbalance, set as
-1 phase miss, judgment condition at least one phase>0.2Ie, at least one phase<0.01Ie).
4.Unbalance calculation
(Difference between maximum deviation from the mean value and mean value)/mean value *100%,if the

mean value of denominator is less than the rated value, the denominator is rated value; voltage rated
value Ue; 3 phase 4 wire Ue as the phase voltage, menu setting 400V instrument as 220V*PT, 100V
instrument as 57V*PT.Current rated value Ie: 5A instrument as 5A*CT, 1A instrument as 1A*CT.
Unbalance set parameter in percentage, e.g. 20 means 20%.
6Communication
6.1 Register listing(MODBUS-RTU)
Address
Parameter
Read or
write
Value range
Data
type
0000H
Password saved
R/W
0001-9999
Uint16
0001H high
byte
Communication
address
R/W
0001-0247
Uint16
0001H low
byte
Communication
baud rate
R/W
0-3：38400、19200、9600、4800bps
0002H
Control character
R/W
8th bit-connection mode
(0-3-phase-4-we, 1-3-phase-3-wire)
7th bit-input voltage range (0-400V, 1-100V)
second bit-input current range (0-5A, 0-1
A)
Uint16
0003H
PT transformation
ratio
R/W
1-9999
Uint16
0004H
CT transformation
ratio
R/W
1-9999
Uint16
0005H
First analog output
parameter setting
Analog output
selection
R/W
The low byte is valid, and the corresponding
parameter refers to the SEL
correspondence in 5.4.2.
Uint16
0006H
First analog output
parameter setting
Analog output full
scale
corresponding
value
R/W
-9999～9999(Same as analog output setting
menu 5.4.2 in Ao.Hi)
Int16
0007H
First analog output
parameter setting
Analog output zero
point
corresponding
value
R/W
-9999～9999(Same as analog output setting
menu 5.4.2 in Ao.Lo)
Int16
0008H-000AH
Second analog
output parameter
R/W
Same as the first analog output parameter
setting
Uint16

setting
000BH-000D
H
Third analog output
parameter setting
R/W
Same as the first analog output parameter
setting
Uint16
000EH-0010H
Fourth analog
output parameter
setting
R/W
Same as the first analog output parameter
setting
Uint16
0011H high
byte
Backlight control
R/W
Only applied to LCD Display meters 0= lights
Uint16
0012H
rt-1 hour，rt-1
minute
R/W
high byte:rt-1 hour，low byte:rt-1 minute
Uint16
0013H
rt-1 multiple rate，
rt-2 hour
R/W
high byte:rt8-rt1 multiple rate(1 sharp, 2 peak,
3 flat, 4 valley)，low byte:rt-2 hour
Uint16
0014H
rt-2 minute，rt-2
multiple rate
R/W
high byte:rt-2 minute，low byte:rt1-rt2 multiple
rate(1 sharp, 2 peak, 3 flat, 4 valley)
Uint16
0015H-0017H
Rt-3, rt4 setting
R/W
Same as rt-1, rt-2 setting
Uint16
0018H-001AH
rt-5，rt6 setting
R/W
Same as rt-1, rt-2 setting
Uint16
001BH-001D
H
rt-7，rt8 setting
R/W
Same as rt-1, rt-2 setting
Uint16
001EH～
0020H
Date time setting
R/W
Year, Month, Day, Hour, Minute, Second
Uint16
0021H high
byte
Automatic meter
reading day
R/W
Month, day
Uint16
0021H low
byte
Current time rate
R/W
1 sharp, 2 peak, 3 flat, 4 valley
0022H
Switching input and
output status
R/W
See 6.2.1
Uint16
0023H high
byte
Decimal point U
(DPT)
R
3～7
Uint16
0023H low
byte
Decimal point I
(DCT)
R
1～5
0024H high
byte
Decimal point PQ
(DPQ)
R
4～10
Uint16
0024H low
byte
Symbol PQ
R
High byte-low byte:Q、Qc、Qb、Qa、P、Pc、
Pb、Pa;
0 is positive and 1 is negative
The following is the primary side power parameter
0025H
UAN
R
0-9999 (see 6.2.2 for conversion formula)
Uint16
0026H
UBN
R
0-9999 (see 6.2.2 for conversion formula)
Uint16
0027H
UCN
R
0-9999 (see 6.2.2 for conversion formula)
Uint16