Acrel AID120 User manual

076
Medical IT System Intelligent Insulation
Monitoring Devices
(5-Piece Set)
Installation and Operation Manual V2.6
Acrel Co., Ltd.

Declaration
Please read this instruction carefully before using this product. All pictures, logos and
symbols involved are owned by Acrel Co., Ltd. All or part of the content shall not be
reproduced publicly without written authorization by non-company personnel.
Please read the instructions and precautions in this operation manual carefully before
using this series of products. Acrel will not be responsible for personal injury or economic
loss caused by ignoring the instructions in this operation manual.
The equipment is professional electrical equipment, any related operation, need to be
carried out by special electrical technicians. Acrel is not responsible for personal injury or
financial loss resulting from the error of non-professional personnel.
The contents of this description will be updated and amended constantly, and it is
inevitable that there will be a slight discrepancy between the physical product and the
description in the product function upgrading. Please refer to the physical product
purchased and obtain the latest version of the description through www. acrel.cn or sales
channels.

Modified Records
No.
Time
Versions
Reasons for revision
01
2016.01.20
V2.0
On the basis of the original insulation monitoring
products, the contents of all five pieces of products are
integrated to replace the instructions of each sub-product.
02
2016.10.25
V2.1
Some errors have been fixed.
03
2016.11.07
V2.2
The overview added "products conform to Enterprise
standards Q31/0114000129C013-2016 IT System
Insulation Monitoring Instrument”.
04
2020.04.01
V2.3
Remove discontinued models from the five-piece set and
make adjustments and updates where necessary.
05
2020.06.11
V2.4
Added panel installation schematic for AID120/150.
06
2020.08.14
V2.5
Correct errors and omissions, adjust the wording.
07
2022.02.18
V2.6
Adjust format, logo update, transformer update, reference
standard update, transformer size update, contact
information update, delete errors, weight leakage and
other problems.
Note:

Contents
1 Introduction............................................................................................................................1
2 Function features....................................................................................................................2
2.1 Function features of AITR series medical isolation transformer....................................2
2.2 Function features of AIM-M100.....................................................................................2
2.3 Function features of AID120/150 ...................................................................................3
2.4 Function features of ACLP10-24....................................................................................3
2.5 Function features of AKH-0.66P26 current transformer ................................................3
3.Reference standard.................................................................................................................3
4 Technical parameters..............................................................................................................4
4.1 Technical parameters of AITR series medical isolation transformer..............................4
4.2 Technical parameters of AIM-M100 medical insulation monitor...................................4
4.3 Technical parameters of AID120/AID150 ......................................................................5
4.4 Technical parameters of ACLP10-24..............................................................................6
4.5 Technical parameters of AKH-0.66P26 current transformer ..........................................6
5 Installation and wiring ...........................................................................................................6
5.1 Shape and mounting hole size.........................................................................................6
5.2 Installation method..........................................................................................................8
5.3 Wiring method...............................................................................................................10
5.4 Typical wiring diagram .................................................................................................13
5.5 Considerations...............................................................................................................14
6 Programming and application..............................................................................................15
6.1 Panel description...........................................................................................................15
6.2 LED indicator instructions............................................................................................16
6.3 Button function descriptions.........................................................................................17
6.4 Button operation descriptions .......................................................................................17
7 Communication protocol......................................................................................................24
7.1 Modbus-RTU communication protocol........................................................................24
7.2 Introduction to the function code..................................................................................24
7.3 AIM-M10 parameter address table ...............................................................................25
8 Typical applications .............................................................................................................27
9 Power on and debugging instructions..................................................................................27
9.1 Wiring check.................................................................................................................27
9.2 Common faults and eliminations ..................................................................................28
9.3 Settings and debugging.................................................................................................29

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Medical IT System Intelligent Insulation Monitoring Devices
1 Introduction
Medical IT systems are primarily used in critical medical 2 locations such as operating rooms,
ICU/CCU intensive care units to provide safe, reliable, and continuous distribution of critical
equipment in these locations. Medical insulation monitoring products are developed by Acrel
according to the special requirements of insulation resistance of distribution system in medical 2 type
places with many years of design experience in the power meter industry. It can be used for isolating
power system in various operating rooms and intensive care units in medical places, realizing
real-time monitoring of system insulation, load, isolation transformer temperature and other operating
conditions, as well as remote monitoring. Products comply with the enterprise standard
Q31/0114000129C013-2016 IT System Insulation Monitor provisions.
Insulation monitoring products of medical IT system (5-piece set) include AITR series medical
isolation transformer, AIM-M100 medical intelligent insulation monitor, AKH-0.66P26 current
transformer, ACLP10-24 dc power module and AID series (AID120, AID150) external alarm and
display instrument, etc., as shown in Table 1.
Table 1 Medical IT System Insulation Monitoring Products
Type & Name
Picture
Description
AITR series
Medical isolation
transformer
AITR series isolation transformer is specially used in
medical IT system. The windings are treated with double
insulation and have electrostatic shielding layer, which
reduces electromagnetic interference between windings. The
PT100 temperature sensor is installed in the wire bag to
monitor the temperature of transformer. The whole body is
treated with vacuum invasion paint, which increases
mechanical strength and corrosion resistance. The product
has good temperature rise performance and very low noise.
AIM-M100
medical intelligent
insulation
monitoring
instrument
The AIM-M100 medical intelligent insulation monitor is
compact in size, easy to install, intelligent, digital and
networked, and is an ideal choice for insulation monitoring
of isolation power supply systems in operating rooms,
intensive care units and other medical places.
AKH-0.66P26
current transformer
The AKH-0.66P26 type current transformer is the
protective current transformer supporting the AIM-M100
insulation monitor, of which the maximum measurable
current is 60A and the transformation ratio is 2000:1.
Shielded twisted-pair cables are standard for secondary
cables which is convenient to install and use.

2 / 29
ACLP10-24
DC power module
Special DC module for instrument, stable output voltage.
The module adopts the standard guide way to install, and can
be installed on the same guide way with the insulation
monitor, easy to install.
AID series
external
alarm and
display
instrument
AID
120
It is suitable for wall installation embedded in operating
room or nurse station and can monitor 1 AIM-M100
insulation monitor. It has sound and light alarm function of
insulation, overload, overtemperature and equipment failure,
digital tube display and RS485 communication.
AID
150
LCD display, RS485 bus, centralized monitoring of up to
16 SETS of AIM-M100 medical intelligent insulation
monitor data, sound and light alarm can be remote. The
AID150 can also monitor data from multiple AIM-R100
residual current monitors.
2 Function features
2.1 Function features of AITR series medical isolation transformer
➢The transformation ratio between the primary and secondary windings is 1:1.
➢Double insulation treatment is adopted between the windings, and the electrostatic shielding layer
is designed.
➢The Pt100 temperature sensor is installed in each wire packet to monitor the temperature of the
isolation transformer.
➢Used for the transformation of TN system into IT system (ungrounded system) after isolation
transformer.
2.2 Function features of AIM-M100
➢Functions of real-time monitoring and fault alarming of the ground insulation resistance,
transformer load current and transformer winding temperature of the monitored IT system.
➢Can be used with insulation fault locator, remotely starting fault-locating and displaying locating
results when there are insulation faults.
➢Real-time monitor the line disconnection fault, temperature sensor disconnection fault and the
functional grounding line disconnection fault of the monitored system, and give the alarm indication
when the fault occurs.
➢Relay alarm output, LED alarm indication and other faults indication functions.
➢Two kinds of fieldbus communication technology, which are used for centralized alarm and display
instrument, test signal generator, insulation fault locator and upper computer management software
communications, and can monitor the operation status of IT system in real time.
➢With event recording function, it can record the time and fault type of the alarm, which is
convenient for operators to analyze the system operation status and eliminate the fault in time.

3 / 29
2.3 Function features of AID120/150
➢The insulation resistance alarm value, load current alarm value and transformer temperature alarm
value of the system can be set remotely.
➢When the system appears insulation fault, overload, transformer temperature over limit and wiring
fault, alarm and display instrument gives out the corresponding sound and light alarm, and has the
function of eliminating sound alarm.
➢Using advanced fieldbus technology, the remote monitoring function can be realized by real-time
data interaction with the insulation monitor.
Table 2 Functional Description of AID Series Products
Model
Selection Description
AID120
It can monitor one set ofAIM-M100 insulation monitor and be used for installation by embedding
into wall. It can be applied to monitor operating room or ICU only using single set of isolated power.
AID150
It can monitor 16 sets of AIM-M100 insulation monitoring instruments to the maximum and
AIM-R100 residual current monitor which can be used for installation by embedding into wall. It is
fit for the centralized monitoring on operating room or ICU or other medical sites.
2.4 Function features of ACLP10-24
➢To employ isolated linear transformer with the characteristics of strong capacity of resisting
disturbance and small ripple etc.
➢AC 220V input, DC 24V output, with max output power of 3W.
➢Used for the DC 24V power supply for AID series centralized alarm and display instrument.
2.5 Function features of AKH-0.66P26 current transformer
➢The maximum measurable current is 60A, and the transformation change ratio is 2000:1.
➢Work with the AIM-M100 insulation monitoring instrument to measure the load current of
isolation transformer.
3 Reference standard
◆IEC 60364-7-710 Building electrical installations section 7-710: Requirements for special
installations or locations----medical locations;
◆IEC 61557-8 Electrical safety of low voltage distribution system below AC 1000V and DC 1500V,
Test, measurement or monitoring equipment for protection test section 8: Insulation monitoring
device for IT systems;
◆IEC 61557-9 Electrical safety of low voltage distribution system below AC 1000V and DC 1500V,
Test, measurement or monitoring equipment for protection test section 9: insulation fault positioning
equipment for IT systems;
◆IEC61558-1 Safety of power transformers, power supplies, reactors and similar products section 1:
General requirements and tests;
◆IEC61558-2-15 Safety of power transformers, power supplies and similar products section 16:
Special requirements for isolation transformers for power supply in medical locations.

4 / 29
4 Technical parameters
4.1 Technical parameters of AITR series medical isolation transformer
Refer to Table 3.
Table 3 Technical Parameters of AITR Series of Medical Isolation Transformer
Type
AITR10000
AITR8000
AITR6300
AITR5000
AITR3150
Insulation class
H
H
H
H
H
Protection class
IP00
IP00
IP00
IP00
IP00
Power/voltage/
current
Rated power
10000VA
8000VA
6300VA
5000VA
3150VA
Rated frequency
50/60Hz
50/60Hz
50/60Hz
50/60Hz
50/60Hz
Rated input
voltage
AC230V
AC230V
AC230V
AC230V
AC230V
Rated input
current
45.3A
36A
28.5A
22.5
14.2A
Rated output
voltage
AC230V/115
V
AC230V/115V
AC230V/115V
AC230V/115V
AC230V/115V
Rated output
current
43.5A
34.7A
27.4A
21.7
13.7A
Inrush current
<12In
<12In
<12In
<12In
<12In
Leakage current
<200μA
<200μA
<200μA
<200μA
<200μA
No load input
current
1.359A
1.08A
0.855A
0.675A
0.426A
No load output
voltage
235V±3%
235V±3%
235V±3%
235V±3%
235V±3%
Short circuit
voltage
<6.9V
<6.9V
<6.9V
<6.9V
<7.5V
General
parameters
Fuse wire
80A
63A
50A
35A
25A
Primary winding
resistance
<55mΩ
<64mΩ
<80mΩ
<131 mΩ
<245mΩ
Secondary
winding resistance
<45mΩ
<64mΩ
<80mΩ
<116 mΩ
<228mΩ
Iron loss
<150W
<105W
<107W
<77W
<55W
Copper loss
<230W
<200W
<170W
<125W
<120W
Efficiency
>96%
>96%
>96%
>96%
>95%
Maximum
ambient
temperature
<40℃
<40℃
<40℃
<40℃
<40℃
No-load
temperature rise
<36℃
<33℃
<31℃
<26℃
<22℃
Full load
temperature rise
<65℃
<76℃
<67℃
<62℃
<55℃
Noise grade
<40dB
<40dB
<40dB
<40dB
<40dB
4.2 Technical parameters of AIM-M100 medical insulation monitor
Refer to Table 4.
Table 4 Technical Parameters ofAIM-M100 Medical Intelligent Insulation Monitoring
Auxiliary
power
supply
Voltage
AC220V (±10%)
Temperature
measurement
Thermistor
Pt100
Frequency
50/60Hz
Measuring range
-50~+200℃

5 / 29
power
consumption
<8W
Alarm value
scope
0~+200℃
Insulation
monitoring
Range of
insulation
resistance
10~999kΩ
Alarm output
Output mode
2-route relay output
(optional)
Absolute
percentage
0~±10%
Contact capacity
AC 250V/3A;
DC 30V/3A
Alarm value
scope
50~999kΩ
Environment
Operating
temperature
-10~+55℃
Response time
<2s
Storage
temperature
-20~+70℃
Measuring
voltage
<12V
Relative
humidity
5%~95%,
non-condensate
Measuring
current
<50uA
Altitude
≤2500m
Load
current
Measuring
range
2.1~50A
Communication
RS485, Modbus-RTU
Alarm value
scope
5~50A
Rated impulse voltage
/ Pollution degree
4KV/Ⅲ
Measuring
accuracy
≤±5%
EMC electromagnetic
compatibility
/ Electromagnetic radiation
Conform to IEC
61326-2-4
4.3 Technical parameters of AID120/AID150
Refer to Table 5.
Table 5 Technical parameters of AID120 / 150
Parameter Type
AID120
AID150
Auxiliary power supply
Voltage
DC 24V
Consumption
< 0.6W
Display range of insulation resistance
0~999kΩ
——
Insulation alarming range
50~999kΩ
——
Transformer load rate display
Percentage display
——
Load current alarm setting
14A、18A、22A、28A、35A、45A
Temperature alarm setting range
0~+200℃
Alarm method
Sound-light alarm
Alarm type
Insulation failure, overload, overheat, equipment
failure
Communication mode
RS485, Modbus-RTU
Display mode
LED digital display
128×64 LCD display

6 / 29
4.4 Technical parameters of ACLP10-24
Refer to Table 6.
Table 6 Technical parameters of ACLP10-24
Input voltage
AC 220V (±10%)
Frequency
50/60Hz
Power
3W
Output voltage
DC 24V±5%
Voltage regulation factor
≤30%
Temperature rise
≤20℃
Dielectric intensity
4000VAC/minute
4.5 Technical parameters of AKH-0.66P26 current transformer
Refer to Table 7.
Table 7 Technical Parameters ofAKH-0.66P26 Current Transformer
Input current
0.5mA~50A
Frequency range
0.02~10 kHz
Output current
0.025~25 mA
Loading resistance
<200Ω
Temperature
coefficient
100 ppm/℃
Transient current
(1s)
200A
Phase displacement
10
Installation
Fixed with 4×10 screws
Operating temperature
-35~+70℃
Secondary wiring
Shielded twisted pair cable
2*0.3mm2, 2m
Storage temperature
-40~+75℃
Secondary resistance
range
95~120Ω
Isolation pressure
5000Vac
Accuracy
0.5%
Linearity
0.5%
5 Installation and wiring
5.1 Shape and mounting hole size
5.1.1 External dimensions of AITR series medical isolation transformer (unit: mm)
Shape and size of AITR series medical isolation transformer are shown as below and in Table 8.
Front view Side view Vertical view

7 / 29
Table 8 External Dimensions of AITR Series Medical Isolation Transformer
Type
Capacity
(VA)
A(mm)
B(mm)
C(mm)
D(mm)
E(mm)
F(mm)
Total weight
(kg) (mm)
(mm) (kg)
AITR10000
10000
280
240
427
240
190
11*8
92
AITR8000
8000
280
240
427
240
190
11*8
90
AITR6300
6300
280
225
427
240
175
11*8
75
AITR5000
5000
280
225
427
240
175
11*8
73
AITR3150
3150
280
215
427
240
175
11*8
53
Note: according to the standard, the maximum capacity of medical single-phase isolation transformer is
10kVA; Dimensions A, B, and C are the length, width, and height of the transformer; dimensions D, E, and F
are the installation dimensions of the transformer; F is the mounting hole position. M8*30 screws are
recommended to fix the transformer.
5.1.2 External dimensions of AIM-M100 medical insulation monitor (unit: mm)
Medical Intelligent Insulation Monitor On Overload
Insulation Overtemp
AIM-M100
AcrelAcrelAcrelAcrelAcrel
Test Menu
1 2 345678 9 10 1112
13 14 15 16 17 18 19 20 2122 23 24
Front view Side view
5.1.3 External dimensions of ACLP10-24 (unit: mm)
www.acrel.cn
DC ON
Type:ACLP10-24
Input:AC 220±10% 50-60Hz
Output:DC 24V 0.125A
Acrel
ACLP10-24 DC Power Supply
1 2 34567
8 9 10 1112 13 14
Front view Side view
5.1.4 External dimensions of AID120/AID150 (unit：mm)

8 / 29
Acrel
Insulation resistance kΩ
Transformer load rate %
On
Insulation
Overload
Overtemp
AID120
Test Mute
Menu
AID120 Front view AID120 Side view
AID120 Hole size
Acrel
On Comm
AID150
Test
Mute Menu
Fault Alarm
AID150 Front view AID150 Side view AID150 Hole size
5.1.5 External dimensions of AKH-0.66P26 current transformer (unit: mm)
Front view Side view Bottom view
5.2 Installation method
In addition to the AID series external alarm and display instrument, the 5-piece set insulation
monitoring devices of medical IT system should be installed in the distribution cabinet (isolated
power cabinet). The isolation transformer should be installed at the bottom of the distribution cabinet,
fixed with supporting bolts, and cooling fan should be installed. The instrument and circuit breaker

9 / 29
are mounted on the upper panel. If the isolation transformer is installed separately, it should be near
from the AIM-M100 insulation monitor. When the AID120/150 external alarm and display instrument
is used in the operating room, it can be embedded in the wall and installed next to the information
panel in the operating room for the convenience of manual medical personnel. When AID150 is used
in ICU/CCU and other intensive care units, it should be installed in the hand nurse station for the
nurses on duty to check, and the RS485 communication between each insulation monitoring
instrument, AID centralized alarm and display instrument under centralized monitoring should be
connected hand in hand. The external wiring of the AID series external display device includes two
24V power lines and one RS485 communication line with 2-core shielded twisted pair. These three
lines are drawn from the isolated power cabinet, and pipelines should be reserved during construction.
5.2.1 Installation mode of AIM-M100 medical insulation monitor
AIM-M100 insulation monitor adopts the installation method of the guide rail, and the fixation
mode is the clip buckle type, as shown in the following figure:
5.2.2 Installation method of ACLP10-24 power module
ACLP10-24 power module is installed by guide rail and fixed by clip-on, which can also be
installed at the same guide rail as AIM-M100 monitoring instrument.
5.2.3 Installation mode of AID series alarm and display instrument
AID120 / 150 external alarm and display device shell is the same, just display and installation
direction is different.
(1) If you choose to embed the wall for installation, taking AID120 as an example, the installation
diagram is as follows:

10 / 29
Side view
4.Connect the
connection wire to the
panel through the
terminal
AID120
Screw
5.Fixed panel and
shell
Acrel
Insulation resistance kΩ
Transformer load rate %
ON
Insulation
Overload
Overtemp
TEST Erasure
MENU
1.Product shape 2.Size of wall
openings
3.Insert the shell
into the wall
Front view
Attention：
As our products are
constantly updated,
this drawing is for
reference only until
it has been
confirmed by the
relevant personnel.
When decorating, first place in the right wall openings, and then isolated power cabinet lead
(2 power cable with 1.5mm2 cables and 1 shielded twisted-pair cable with 1.5mm2cable) introducing
the receiving terminal, the shell knocked down hole near the line, then embedding external alarm and
display the shell wall and internal fixation, the terminal to circuit board corresponding terminals on
the front cover, Install the panel on the housing and fix it with the supplied tapping screws.
(2) If you choose to install on an opening cabinet door, taking AID150 as an example, the
installation diagram is as follows.
AID150 shape Separate the product
body from the cassette
Install the cassette on
the door panel
Hole size of door
panel
Screw Clasp
Fix the panel to
the cassette
Screw
Attention：
As our products
are constantly
updated, this
drawing is for
reference only
until it has
been confirmed
by the relevant
personnel.
5.3 Wiring method
5.3.1 Wiring mode of AITR series medical isolation transformer
The input terminals at the transformer terminal blocks are labeled with "PM", in which two
terminals 0 and 230 are connected to the input 220V single-phase AC. The output terminals are
labeled with "SEC", in which the output voltage of two terminals 0 and 230 is AC 220V and is

11 / 29
connected to external field load. The S terminal is connected to the PE bus bar on the spot (or the
equipotential terminal line). Two ST terminals are temperature sensor interfaces, which are
respectively connected to the No.11 and 12 terminals of AIM-M100 insulation monitoring instrument.
Power Input Grounding temperature Powe Output
NL PE T0 T1 L1 L2
Note: The wirings of input and output terminals of the isolation transformer should select the copper wires
matching the line diameter based on the isolation transformer rated input and output current (refer to tables
in section 5.4). S terminal wiring can select 2×4mm2yellow-green wire. The wiring of two ST terminals can
select 2×1.5mm2shielded twisted pairs, and the wiring should not be too long.
5.3.2 Wiring mode of AIM-M100
Upper row terminals: U1, U2 for the auxiliary power supply, and L1, L2 are connected to the
monitored IT system (which can be connected with U1 and U2 in parallel, and then connected to the
two output terminals of isolation transformer). I0, I1 for the current transformer signal input, and T0,
T1 as the temperature sensor signal input.
1 2
U1 U2
4 5
L1 L2
L2
L1
8 9
I0I1
L2
L1
11 12
T0T1
T0T1
*
*
FUSE
L2
L1
FUSE
Power IT system current temperature
Lower row terminals: FE,KE are respectively connected to the field equipotential grounding
terminal block, A1,B1 are the communication terminals with the upper computer, A2,B2 are the
communication terminals with the external alarm and display instrument, J1 is the over temperature
alarm output (used to control the cooling fan), and J2 is the output of the fault alarm relay.
13 14
FE KE
FE KE
21 22
J1
J1
15 16
A B
A B
18 19
A B
A B
23 24
J2
J2
21
Grounding communication 1 communication 2 relay output

12 / 29
Note:
(1) The wirings connecting 1 and 2 terminals of the insulation monitor can select 2×1.5mm2cable, and the
L1 and L2 terminals corresponding to 4 and 5 can select 2×1.5mm2cable. and the FE and KE terminals
corresponding to 13 and 14 can select 2×4mm2yellow-green cable (grounding cable). J1, J2 relay output are
the dry nodes, which need additional power supply during the control of external load. For example, J1
controlsAC 220V cooling fan, then theAC 220V power supply is needed, and the cable type should be
determined according to the load current.
(2) 2×1.5mm2shielded twisted pair cable can be selected for current transformer signal line corresponding
to terminals 8 and 9, temperature signal line corresponding to terminals 11 and 12, RS485 communication
line corresponding to terminals 15 and 16, and RS485 communication line corresponding to terminals 18 and
19. The COM port for communication does not need wiring.
5.3.3 Wiring mode of AID120 / 150 centralized alarm and display instrument
A and B relate to A2 and B2 in the lower terminal of AIM-M100. The terminals of the power
supply correspond to the positive pole and ground of the 24V DC power module respectively. The
wiring diagram is shown in the following figure.
24V G
24V G
A B
A B
Power RS485
The 24V power supply can be connected by multiple copper wires of 2 x 1.5mm2, and the RS485
communication terminal can be connected by shielded twisted pair of 2 x 1.5mm2.
5.3.4 Wiring mode of ACLP10-24
A1 A2 A3 A4
AC 220V 50/60Hz
V1 GV2 GV3 G
3组直流24V输出
www.acrel.cn
DC ON
Type:ACLP10-24
Input:AC 220±10% 50-60Hz
Output:DC 24V 0.125A
Acrel
ACLP10-24 DC Power Supply
1 2 34567
8 9 10 1112 13 14
Terminals 1 and 2 (A1, A2) of ACLP10-24 power supply module are input terminals of AC 220 V
power supply, and terminals 6 and 7 (A3, A4) are input expansion terminals. In the instrument, A3 is

13 / 29
connected with A1 and A4 is connected with A2. 8 and 9 (V1, G), 10 and 11 (V2, G), 13 and 14 (V3,
G), these are three groups of 24 V power output, which are used to provide DC power supply for
external alarm and display instrument of AID series. Inside the instrument, all V terminals are
connected and all G terminals are connected.
5.4 Typical wiring diagram
More information:
(1) The connection line diameter of the input and output of the isolation transformer should match
the rated current of the isolation transformer, or it can be selected according to the following table:
Isolation transformer type
Selected line diameter
AITR3150
3×4mm2
AITR5000/AITR6300
3×6mm2
AITR8000/AITR10000
3×10mm2
(2) Terminals 1, 2, 4 and 5 of AIM-M100 insulation monitor, and terminals 1 and 2 of ACLP10-24
power module need to be connected with AC220V of IT system, which can be directly connected to 0
and 230V output terminals at the secondary side of isolation transformer according to the diagram,
and connected with 6A fuse protection in series.
(3) The relay output control of 20 and 21 terminals in AIM-M100 insulation monitor is a dry node,
which needs an additional fan power supply when used. When multiple transformers are installed in
one isolation power cabinet, multiple fans should be connected in a parallel mode controlled by
multiple insulation monitors, that is, every one insulation monitor can start or stop all fans.
(4) AKH-0.66P26 only needs to be passed through one of the L1, L2. It cannot be passed through

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the two wires. The output is connected with the 2×1.5mm2 wire to the No.8, 9 terminals of
AIM-M100, which is not allowed for grounding.
(5) In order to reliably monitor the grounding insulation of the isolation power system, the No.4, 5
terminals of AIM-M100 insulation monitor should be reliably connected to IT system (which can be
connected in parallel to the output terminal of the isolation transformer) with 2×1.5mm2multicore
copper wires, and the No.13, 14 terminals should be respectively connected to the on-site
equipotential terminals (or the grounding terminals in the isolation power cabinet) with two
independent 4mm2yellow-green grounding wires.
(6) When AID150 centralized alarm and display instrument monitors multiple sets of AIM-M100 at
the same time, the communication line should be connected by hand (that is, after the communication
line of the previous meter is connected to the communication terminal of this meter, it is led out from
the terminal of this meter and connected to the communication terminal of the following table). One
matching resistance shall be connected between the two communication terminals at the head and end
of RS485 bus, and the resistance recommended and attached with the goods. The resistance is 120Ω.
The 15 and 16 terminals of AIM-M100 are also RS485 communication terminals, which are used to
communicate with the upper computer. If there is no upper computer, there is no wiring.
5.5 Considerations
(1) Medical IT system insulation monitoring and fault locating seven pieces of products should be
centrally installed in the isolation power cabinet except for AID150. If the field space is too limited to
apply the isolation power cabinet, the isolation transformer can be installed separately, but should not
be too far away from the insulation monitor and the field load.
(2) The installation of wiring should strictly follow the wiring diagrams, which should preferably
use the pressure connection with the needle-type fittings, and then insert into the corresponding
terminal of the instrument and tighten the screws to avoid the abnormal work conditions of instrument
caused by loose connection.
(3) The grounding wire of the instrument and the transformer shall be reliably connected with the
equipotential terminals in the field. When applying the isolation power cabinet, it should be connected
to the grounding terminals in the isolation power supply cabinet, and then to the equipotential
terminals in the field.
(4) The current input of AIM-M100 medical intelligent insulation monitoring instrument should use
a matching AKH-0.66P26 type current transformer. It is recommended to use pressure connection
with U-type indenters during wiring operation, and then connect to the CT terminal. Do not directly
use the bare head connection, for the considerations of reliable connection and easy disassembly.
Before removing the wiring, the CT primary circuits must be cut off or the secondary circuits must be
short connection.

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(5) Special reminder:
Any isolation transformer will have an impact current when it starts up, and too large impact
current may cause the circuit breaker at primary side of the transformer difficult to disconnect
or shut down. Therefore, for medical IT systems composed of medical isolation transformers
and insulation monitoring products, in the selection of inlet circuit breaker of the isolation
transformer, it is recommended to choose the circuit breakers only with short circuit protection
but without overload protection according to GB requirements. If choosing the circuit breaker
with overload protection, the circuit breaker should conform to the C and D tripping curves of
GB14048.2-2008, and the rated current of the circuit breaker should be determined according
to the capacity of the isolation transformer as follows: 10kVA-63A, 8kVA-50A, 6.3kVA-40A,
5kVA-40A, 3.15kVA-20A.If the circuit breaker selection is not in accordance with the above
requirements, the company shall not be liable for any medical malpractice caused by the
closure difficulty of the circuit breaker or the disconnection of the circuit breaker during
operation.
6 Programming and application
6.1 Panel description
(1) AIM-M100 Insulated monitor panel
Medical Intelligent Insulation Monitor On Overload
Insulation Overtemp
AIM-M100
AcrelAcrelAcrelAcrelAcrel
Test Menu
LED Indicator
Terminal *12
Terminal *12
LCD Dispaly
Operation Key
(2) AID120 External alarm and display panel
Acrel
Insulation resistance kΩ
Transformer load rate %
On
Insulation
Overload
Overtemp
AID120
Test Mute
Menu
LED Indicator
LCD Display
Installed Screw
Operation Key
(3) AID150 External alarm and display panel

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Acrel
On Comm
AID150
Test
Mute Menu
Fault Alarm
LED Indicator
LCD Display
Installed Screw
Operation Key
6.2 LED indicator instructions
6.2.1 AIM-M100
Indicator
Instructions
On
When the instrument operation is normal, the indicator light flashes, with the
flashing frequency of about one time per second.
Insulation
When the insulation resistance exceeds the alarm value, or when the LL/FK is
disconnected, the indicator light flashes to alarm.
Overload
When load current exceeds the total load current of transformer, the indicator
light flashes to alarm.
Overtemp
When testing transformer temperature exceeds the alarm value, or when the
temperature sensor wiring is disconnected, the indicator light flashes to alarm.
6.2.2 AID120
Indicator
Instructions
On
When the device is in normal operation, the indicator flashes, and the flickering
frequency is about once a second.
Insulation
When the insulation resistance exceeds the alarm value, the indicator light flashes
to alarm.
Overload
When load current exceeds the total load current of transformer, the indicator
light flashes to alarm.
Overtemp
When testing transformer temperature exceeds the alarm value, the indicator light
flashes to alarm.
6.2.3 AID150
Indicator status
Instructions
On
When the device is in normal operation, the indicator flashes, and the flickering
frequency is about once a second.
Comm
Indicate the status of device communication, when there is data communication,
the indicator light flashes.
Fault
WhenAIM series monitor detect disconnection failure, indicator flashes alarm.
Alarm
WhenAIM-M series monitor exceed threshold alarm, indicator flashing alarm.