Acrel AIM-T500L Series User manual

375
AIM-T500L Series Industrial
Insulation Monitoring and Fault
Locating System
Installation and Operation Manual V1.3
Acrel Co., Ltd.

Declaration
Please read this manual carefully before using these products, in which the
involved pictures, logos, symbols, etc. are all reserved by the Acrel Co., Ltd.
Personnel not inside the company shall not publicly reprint all or part of the contents
without written authorization.
Before using the product, please read the tips and precautions in this operation
manual, and Acrel does not take responsibility for personal injuries or economic
losses caused by ignoring tips of this manual;
The contents of the manual will be continuously updated and revised, thus the
products functions in this manual may inevitably have a slight discrepancy with the
real objects during the continuous upgrading process. Users should give first place to
the purchased real products, and can search www. acrel.cn to downloads or through
sales channels to obtain the latest version of the manual.

Contens
1 Introduction...............................................................................................................1
2 Functional characteristics........................................................................................2
2.1 AIM-T500L insulation monitor ...............................................................................2
2.2 ASG200 test signal generator ..................................................................................2
2.3 AIL200-12 insulation fault locator ..........................................................................2
2.4 AKH-0.66L series current transformer ....................................................................2
3 Reference standards .................................................................................................3
4 Technical parameters................................................................................................3
4.1 AIM-T500L insulation monitor ...............................................................................3
4.2 ASG200 test signal generator ..................................................................................4
4.3 AIL200-12 insulation fault locator ..........................................................................4
4.4 AKH-0.66L series current transformer ....................................................................5
5 Installation and connection......................................................................................5
5.1 Shape and size..........................................................................................................5
5.2 Installation method ..................................................................................................7
5.3 Wiring method .........................................................................................................7
5.4 Typical application...................................................................................................9
5.5 Matters needing attention.......................................................................................10
6 Program and Usage.................................................................................................10
6.1 AIM-T500L insulation monitor .............................................................................10
6.2 ASG200 test signal generator ................................................................................13
6.3 AIL200-12 insulation fault locator ........................................................................13
7 Address table ...........................................................................................................15
8 Typical application..................................................................................................17
8.1 AIM-T500L typical wiring method.........................................................................17
8.2 AIM-T500L series fault location system application diagram ..............................18

1
AIM-T500L Series Industrial Insulation Monitoring and Fault Locating System
1 Introduction
With the development of industrial science and technology, residual current poses a great threat to industrial
production safety. In order to improve the continuity and reliability of power supply, many important production
sites adopt IT distribution system (ungrounded system).
AIM-T500L series industrial insulation monitoring and fault location system is specially developed by Acrel
for IT distribution system in industrial occasions such as mine, glass factory, electric furnace and test equipment,
ship, metallurgical plant, chemical plant, explosion hazard site, computer center and emergency power supply. The
system has rich functions, including insulation resistance monitoring, insulation fault warning, insulation fault alarm,
event recording, parameter setting, communication networking, etc. When the system has grounding fault, it can
give a timely alarm and accurately locate the specific circuit of the fault to remind staff to check the fault in time.
The products conform to the requirements of enterprise standard Q/VDCL-26-2017 IT System Insulation
Monitor.
Type and Name
Picture
introduction
AIM-T500L
insulation monitor
AIM-T500L insulation monitor adopts
advanced microcontroller technology, high
integration, small size, easy to install,
intelligent, digital, networking in one. wide
measuring range, fast reaction speed and large
allowable system leakage capacitance.
ASG200
test signal generator
ASG200 test signal generator can start
and produce test signals in time when
insulation fault occurs in the monitored IT
system. It can coordinate with insulation fault
locator to realize insulation fault location
function and send fault phase line.
AIL200-12
insulation fault
locator
AIL200-12 insulation fault locator
adopts high-precision signal detection circuit,
and AKH-0.66L series current transformer,
detection the signal of ASG200 test signal
generator, accurate location of the insulation
fault loop. every locator can locate 12 loops.

2
AKH-0.66L series
current transformer
AKH-0.66L series current transformer is used
with AIL200-12 insulation fault locator
together, ratio is 1000:1. It is installed in the
cabinet in the way of screw direct fixation.
2 Functional characteristics
2.1 AIM-T500L insulation monitor
1) Monitor the insulation resistance of IT system in real time, warning or alarm when the resistance exceeds
the limit;
2) Relay alarm output, LED alarm output and other fault indication modes;
3) SOE function, convenient for staff to check and analyze the failure type and occurrence time, and judge the
operation status of the system;
4) Self-check function, which can realize fault self-check of instrument hardware circuit;
5) Disconnect monitoring, real-time monitoring of PE/KE function grounding wire connection status;
6) RS485 interface, standard Modbus-RTU protocol;
7) CAN interface, custom protocol, used to interact with signal generator and fault locator;
8) Support manual/automatic reset modes;
9) Wide range of applications, suitable for AC, DC and AC-DC hybrid IT systems.
2.2 ASG200 test signal generator
1) Generate positioning signals and inject them into the ungrounded system;
2) Indicate the phase line where the fault is;
3) Manual startup positioning is supported;
4) CAN bus technology is adopted to facilitate data interaction with other devices in the system.
2.3 AIL200-12 insulation fault locator
1) Locate and indicate the loop where the fault is;
2) A single AIL200-12 can locate up to 12 loops;
3) Each IT system can be connected to a maximum of 90 locators, with a total of 1080 loops;
4) CAN bus technology is adopted to facilitate data interaction with other devices in the system.
2.4 AKH-0.66L series current transformer
1) Rated current ratio 5A:5mA, ratio 1000:1, select the appropriate aperture according to the rated current of
the loop;
2) Coordinate with AIL200-12 insulation fault locator to achieve fault location.

3
3Reference standards
3.1 Q/ VCL-26-2017 IT System Insulation Monitor.
3.2 IEC 61557-8:2014 Electrical safety in low voltage distribution systems up to 1000V a.c. and 1500V d.c. -
Equipment for testing, measuring or monitoring of protective measures - Part 8: Insulation monitoring devices for
IT systems.
3.3 IEC 61557-9:2014 Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or monitoring of protective measures - Part 9: Equipment for insulation fault
location in IT systems.
3.4 IEC 61326-2-4:2020 RLV Redline version Electrical equipment for measurement, control and laboratory use -
EMC requirements - Part 2-4: Particular requirements - Test configurations, operational conditions and
performance criteria for insulation monitoring devices according to IEC 61557-8 and for equipment for insulation
fault location according to IEC 61557-9.
4 Technical parameters
4.1 AIM-T500L insulation monitor
Acces
sory
power
suppl
y
Voltage
AC85~265V
DC100~300V
Voltage
range
System voltage
AC 0~690V
DC 0~800V
Power dissipation
<8W
Frequency range
40~460Hz
Insula
tion
monit
oring
Measuring range
1k~10MΩ
Enviro
nment
Working temperature
-15~+55℃
Alarm range
10k~10MΩ
Storage temperature
-20~+70℃
Response time
(Ce=1μF)
<5s
Relative humidity
<95%, without
condensation
system leakage
capacitance
<500μF
Altitude
≤2500m
Internal
paramete
rs
Measuring voltage
<50V
Output
Relay output
Error, warning,
Alarm
Measuring current
<270μA
Communication
RS485, Modbus-RTU
CAN, custom protocol
Internal DC
impedance
≥180kΩ
Rated impulse voltage
/Pollution Level
8kV/Ⅲ

4
4.2 ASG200 test signal generator
Accessory power
supply
Voltage
AC 85~265V
DC100~300V
Power dissipation
<7W
IT system
Voltage
AC 220V
3AC 0~690V
DC 0~800V
Fault locating
Response time
<5s
positing voltage
20V/5Hz
positing current
0~10mA
Response sensitivity
——
Internal
parameters
EMC/ Radiation
IEC61326-2-4
Output
Relay output
——
Environment
Working temperature
-15~+55℃
4.3 AIL200-12 insulation fault locator
Accessory power
supply
Voltage
AC 85~265V
DC100~300V
Power dissipation
<5W
IT system
Voltage
——
Fault locating
Response time
<12s
positing voltage
——
positing current
——
Response sensitivity
>0.5mA
Internal parameters
EMC/ Radiation
IEC61326-2-4
Output
Relay output
Alarm
Environment
Working temperature
-15~+55℃

5
4.4 AKH-0.66L series current transformer
specifications
Rated
current
Ratio
Accurate
level
rated load
Overload
ratio
L-45
16-100A
5A:5mA
1 level
100Ω
10
L-80
100-250A
L-100
250-400A
L-150
400-800A
L-200
800-1500A
5 Installation and connection
5.1 Shape and size
5.1.1 AIM-T500L (unit: mm)
Acrel
AIM-M100
Acrel
AIM-M100
Acrel
AIM-M100
Acrel
AIM-M100
Acrel
AIM-M100
Acrel
AIM-T500L
ON
ERROR
WARNING
ALARM
COMM
TEST/ESC MENU/
Front view Side view
Back view
121314151617
PEKE
2829
B
1918
A
1
U1
2
U2
6
H
7
L
31
T1
32
T2
23
F1F2
24 9
AK
5
L2
4
L1

6
5.1.2 ASG200 (unit: mm)
1
U1 2
U2 7
L
6
H
8
L1/+ 14
PE
10
L2/- 12
L3
On L1/+
L2/-
L3
Comm
Acrel
ASG200
Test
Test Signal Generator
www.acrel.cn
Front view Side view
5.1.3 AIL200-12 (unit: mm)
L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12
AcrelAcrel
AIL200-12
On
Comm
L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12
AcrelAcrel
AIL200-12
Reset
ESC
Menu
www.acrel.cn
1 2 458 9 11 12
13 14 20 21 22 23 24
U1 U2 I 2 I 3 I 6 COM2
DO+ DO-
I 7
I 1
367
I 4 I 5 10 I 8
COM1
I12 I11I10 I 9
17 18
H L
Front view Side view
5.1.4 AKH-0.66L series current transformer
AKH-0.66L series current transformer dimension are shown in the table below:
Type
Rated current
（A）
A/mm
B/mm
C/mm
D/mm
E/mm
F/mm
G/mm
H/mm
Weight
/kg
L45
16~100
74
22.5
4.5
4
45
65
75
64.5
0.18
L80
100~250
120
23
4.5
4
80
105
120
104.5
0.42
L100
250~400
140
23
4.5
4
100
124
140
123.5
0.50
L150
400~800
204
24
4.5
6
150
160
197
173.5
1.32
L200
800~1500
246
28
4.5
6
200
210
241
213.5
1.94

7
Note: The current transformer with corresponding specifications should be selected according to the rated
current of the circuit and the thickness of the wire. (If you have special requirements on the shape and range of the
transformer, contact us)
5.2 Installation method
AIM-T500L insulation monitor adopts embedded installation (which can be installed in the distribution
cabinet), the size of the opening hole is as follows:
AGS200 test signal generator and AIL200-12 insulation fault locator adopt DIN-35mm rail installation, they
can be installed with the cabinet terminal row.
5.3 Wiring method
5.3.1 AIM-T500L wiring method
D
C
BA
E
G
F
H

8
H, L (6, 7) are CAN communication terminals, which are used to communicate with the signal generator and
fault locator of the fault positioning system. T1 and T2 (31, 32) are self-check terminals, which can determine
whether the resistance measurement of the instrument is normal or not. This function must be used without access
to the DC system. Short-connect T1 and T2, and the instrument self-test results will be displayed. F1 and F2 (23,
24) are interconnection terminals. When two sets of ungrounded systems are interconnected, the instrument
connected to F1 and F2 will stop working and be separately monitored by another instrument, which is usually
used for the situation of two-segment bus with busbar coupling.
AK (9) is the extension terminal, used for insulation monitoring above AC690/DC800V, see ACPD series
installation and operation manual for details. L1, L2 (4, 5) are used to access the monitored IT system (three-phase
or single-phase IT system without neutral line is connected to any 2 phases. For three-phase IT systems with
neutral lines, L1 and L2 are connected to the neutral line, in a single-phase DC system, L1 is connected to the
positive pole and L2 to the negative pole).
DO1 (12, 13), DO2 (14, 15) and DO3 (16, 17) are the outputs of three sets of relays, which normally
correspond to the outputs of error alarm, fault alarm and fault warning respectively. PE and KE (28, 29) are the
instrument functional grounding terminals, which shall be connected to the field equipotential grounding terminal
row respectively. A, B (18, 19) are the Interfaces A and B of RS485 respectively for communication with the
upper computer. U1, U2 (1, 2) terminals are auxiliary power interfaces for instruments, generally connected to
220V AC power supply.
5.3.2 ASG200 wiring method
辅助电源
1 2 3 4 5 6 7
U1 U2
CAN通讯 外接IT系统
8 9 10 11 12 13 14
PE
功能接地
U1, U2 (1, 2) terminals are auxiliary power interfaces for instruments, generally connected to AC220V power
supply. H, L (6, 7) are CAN communication terminals used for communicating with insulation monitors and fault
locator of fault positioning system.
L1/+, L2/-, L3 (8, 9, 10) are used for access to monitored IT system (three-phase IT system access to three-
phase, single-phase IT system access to L1, L2; For single-phase DC systems, L1/+ is connected to the positive
CAN通讯
6
H
7
L
31
T1
32
T2
23
F1F2
24
复位 联锁输入
9
AK
5
L2
4
L1
扩展 IT系统
121314151617
PEKE
2829
继电器输出 功能接地
B
1918
A
1
U1
2
U2
485通讯 辅助电源

9
pole and L2/- is connected to the negative pole). PE (14) is the instrument functional earthing terminal and shall be
connected to the field equipotential earthing terminal row.
5.3.3 AIL200-12 wiring method
辅助电源
1 2 3 4 5 6 7
U1 U2
8 9 10 11 12
13 14 17 18 20 21 22 23 24
CAN通讯
信号输入
信号输入
继电器输出
辅助电源
1 2 3 4 5 6 7
U1 U2
8 9 10 11 12
13 14 17 18 20 21 22 23 24
CAN通讯
信号输入
信号输入
继电器输出
U1, U2 (1, 2) terminals are auxiliary power interfaces, generally connected to 220V AC power supply. I△1~I
△4(3, 4, 5, 6) respectively access 1~4 loop residual current transformer. COM1 (7) access other side with 1~4 loop
of residual current transformer. I△5~I△8(8, 9, 10, 11) respectively access 5~8 loop residual current transformer.
COM2 (12) access other side with 5~8 loop of residual current transformer.
DO+, DO- (13, 14) is relay output, corresponding to fault alarm output, as long as there is any alarm signal
along the loops, be closed. H, L (17, 18) is CAN communication terminal used to interact with insulation monitor
and signal generator of the fault location system. I△9~I△12 (24, 23, 22, 21) respectively access 9 ~ 12loop residual
current transformer. COM3 (20) access other side with 9~ 12 loop of residual current transformer.
5.4 Typical application
AIM-T500L series industrial insulation monitoring and fault locating system typical application wiring method is
as follow:
N
U
V
W
PE
AC220V power supply
3 phase transformer
Nungrouded
AIM-T500L Insulation monitoring and fault locating
system diagram
note: 1,The power supply is AC220V, which can be supplied in parallel
buscouple
RS485
sef-check
CAN communication
If the N
line is
not
elicited,
access
any 2
phase in
the 3
PE
Load load load load
DO1~3
Alarm light
power for light
2、AIl200-12 has 12 loops for monitoring, it can be connected up to 90 in system
AIM-T500Linsulation monitor
121314151617
PEKE
2829
B
1918
A
1
U1
2
U2
3132 23
F2
24 9
AK
4
L1T1T2 F1
6 7
H L
5
L2
1
U1 2 U2 7 L
6
H
8
L1/+ 14
PE
10
L2/- 12
L3
On L1/+
L2/-
L3
Comm
Acrel
ASG200
Test
Test Signal Generator
www.acrel.cn
L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12
AcrelAcrel
AIL200-12
On
Comm
L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12
AcrelAcrel
AIL200-12
Reset
ESC
Menu
www.acrel.cn
1 2 4 5 8 9 11 12
13 14 20 21 22 23 24
U1 U2 I 2 I 3 I 6 COM2
DO+ DO-
I 7
I 1
367
I 4 I 5 10 I 8 COM1
I12 I11I10 I 9
17 18
H L

10
5.5 Matters needing attention
1) Wiring shall be conducted according to the wiring diagram during installation. It is better to press and
connect the wires with the needle-type sleeve joint, then insert the corresponding terminals of the instrument and
tighten the screws to avoid abnormal operation of the instrument due to poor contact.
2) AIM-T500L has two communication interfaces, and the first one is RS485 communication interface.
Modbus-RTU protocol. When connected to the system, a bus can theoretically connect up to 128 instruments
simultaneously. The second is the CAN communication interface, which uses a custom protocol for the data
interaction between each component of the insulation fault location system. The CAN address of AIM-T500L
defaults to 1, ASG200 and AIL200-12 only have one-way CAN communication interface, the CAN address of
ASG200 defaults to 1, and the CAN address of AIL200-12 defaults to 1, it can be set 1-90.
3) It is recommended to use shielded twisted pair wire when CONNECTING AIM-T500L to the upper
computer system. Each core section should be no less than 1.0mm2, connected to A and B respectively, and the
communication wire shouldbe kept away from strong electric cables or other strong electric field environmentwhen
wiring. Suggestthe end insulation monitor of matching resistorin parallel between A and B terminals, recommended
value for 120Ω; Insulation fault location system CAN communication interface connection, pay attention to the
connection H and L, the distance is longer than the suggested in head and tail end parallel matching resistance and
recommended value for 120Ω.
4) The output of AIM-T500L relay does not carry power, and the external alarm (or warning light) shall be
equipped with additional independent power supply.
6 Program and Usage
6.1 AIM-T500L insulation monitor
6.1.1 Display Panel
Acrel
AIM-M100
Acrel
AIM-M100
Acrel
AIM-M100
Acrel
AIM-M100
Acrel
AIM-M100
Acrel
AIM-T500L
ON
ERROR
WARNING
ALARM
COMM
TEST/ESC MENU/
Logo
Keys
LED LED
LCD
6.1.2 LED
5 LED indicators are used to indicate the status of the insulation monitor:
"ON": when the device is in normal, the indicator light flashes at a frequency of about once per second.

11
"COMM": when the device has communication data to send and receive, the indicator light flashes.
"ERROR": when the device PE, KE broken line, indicator light flashing.
"WARNING": When the monitored insulation resistance value is less than the warning value, the warning
indicator flashes.
"ALARM": When the monitored insulation resistance value is less than the alarm value, the warning and alarm
indicator light flashes.
6.1.3 keys function
There are four keys in the device, which are self-check/return, up/down, menu/Enter.
6.1.4 keys operation
1. Button operation on the main interface
(1) Boot into the main interface by default. If no other keystrokes are performed, the system enters the main
interface and runs. The main interface displays the insulation resistance, leakage capacitance, and current system
time.
(2) Check the alarm record. In the main interface, press "up key" or "down key" to enter the event record query
interface, and turn the page by "up key" or "down key" to query the last 20 fault records in turn. Article 1 is the
most recent record and article 20 is the oldest record.
(3) Instrument self-test. Press the "Self-test" key and the monitor will start the self-test program to simulate
insulation failures and system errors.5 LED lights are on at the same time and the relay is closed. The self-test result
will be displayed after 2s to check whether the instrument functions normally.
2. Parameter setting
(1) Enter the menu
Under normal operation, press "Enter" to enter the password entry page. Set the number size by "up" and
"down". After entering the correct password, press "Enter" to enter the menu. Otherwise, "Password error" will be
displayed and return automatically after 1s.
(2) Password setting
After entering the menu, select the option "Password setting", press "up" and "down" to reset the system
password (long press is supported). Press the "Return" key to exit. At this time, you can choose whether to save
Keys
keys function
TEST/ESC
In non-programming mode, it is used to start the self-check function;
In programming mode, for exit.
Up button,
Down button
In non-programming mode, it is used to view and browse fault records;
In programming mode, used to increase or decrease values.
MENU/
In non-programming mode, used to enter programming mode;
In programming mode, for validation.

12
the setting or not. Press the "Enter" key to confirm and exit. Operation examples are as follows:
AlarmSet Comm Set
ClearSOE Password
LCD Set Time Set
--------------------
--------------------
Save Set？
Yes No
--------------------
Input Password:
0000
--------------------
2015-07-02 12:30:45
--------------------
+ IT-SYSTEM on
--------------------
Insu. Rf> 10 MΩ
Leakage Ce= 000 uF
SW info. Cap Set
adjust
--------------------
LCD Set
--------------------
Contrast: 30
Time Hold: 060s
select
--------------------
Time Set
--------------------
Data Set:2020-03-01
Time Set: 09:18:29
--------------------
Alarm Set
--------------------
Warning: 60K
Alarm: 30K
--------------------
Comm Set
--------------------
Address: 001
Baud: 9600
--------------------
Password
--------------------
Input New Password
0000
--------------------
Language
--------------------
Chn Eng
Press MENU Press Up and Down to input password
Press Enter to confirm
Press ESC to return
Press Up and Down to select Yes or No
Press Enter to confirm
Press Up and Down to set LCDSet, press
ESC to save or exit
Press Enter to confirm
Press Up and Down to
select the TimeSet and
press Enter to confirm.
adjust select
adjust select
adjust select
adjust select
adjust select
Press Up and Down to
select the AlarmSet and
press Enter to confirm.
Press Up and Down to set TimeSet, press
ESC to save or exit
Press Up and Down to set AlarmSet, press
ESC to save or exit
Press Up and Down to
select the CommSet and
press Enter to confirm.
Press Up and Down to
select the Password and
press Enter to confirm.
Press Up and Down to
select the Language and
press Enter to confirm.
Press Up and Down to set CommSet, press
ESC to save or exit
Press Up and Down to set Password, press
ESC to save or exit
Press Up and Down to set password, press
ESC to save or exit
--------------------
Fault Location
--------------------
ON OFF
adjust select
Press Up and Down to
select the Location and
press Enter to confirm.
Press Up and Down to set password, press
ESC to save or exit
(3) Alarm setting
Alarm setting is to set the insulation warning value and the size of insulation alarm value of the system. It
belongs to the menu of the same level as "password setting", and the entry steps are the same. The default alarm
value is 60K and the alarm value is 30KΩ.
(4) Communication Settings

13
Communication Settings can modify the communication address and baud rate, with the upper computer
communication, default address is 1, and baud rate is 9600.
(5) Setting of other information
The insulation monitor also includes "time setting", "LCD setting", "capacitance setting", "language setting",
"fault location" and other functions, which are all set by default by factory. If you need to modify the parameter
Settings, refer to the above operation, we will not repeat the example here.
(6) Clear the record
This function is used to clear SOE in the meter.
(7) Software information
This feature is used to view software version information.
6.2 ASG200 test signal generator
6.2.1 Display Panel
1
U1 2
U2 7
L
6
H
8
L1/+ 14
PE
10
L2/- 12
L3
On L1/+
L2/-
L3
Comm
Acrel
ASG200
Test
Test Signal Generator
www.acrel.cn
6.2.2 LED
5 LED indicators are used to indicate the current status of ASG200 test signal generator;
"On": when the device is in normal operation, the indicator light flashesat a frequency of about once persecond;
"Comm": when the device has communication data to send and receive, the indicator light flashes;
"L1/+": when insulation fault occurs in Phase A or L+, the indicator light will be on;
"L2/-": when insulation fault occurs in B phase or L-, the indicator light will be on;
"L3": when insulation fault occurs in Phase C, the indicator light will be on.
6.2.3 keys function
The ASG200 test signal generator has only one "start" button, which can be used to manually
start fault location. After manual starting, the signal generator interacts with the insulation monitor
and the fault locator, the instrument communication light flashes, and the interface of the insulation
monitor shows that manual fault location is started. If the system insulation is in normal condition,
the insulation monitor will return to normal after re-measuring.
6.3 AIL200-12 insulation fault locator
6.3.1 Display Panel

14
L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12
AcrelAcrel
AIL200-12
On
Comm
L1 L2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12
AcrelAcrel
Reset
ESC
Menu
www.acrel.cn
1 2 458 9 11 12
13 14 20 21 22 23 24
U1 U2 I 2 I 3 I 6 COM2
DO+ DO-
I 7
I 1
367
I 4 I 5 10 I 8
COM1
I12 I11I10 I 9
17 18
H L
AIL200-12
6.3.2 LED
14 LED indicators are used to indicate the current status of ail200-12 insulation fault locator:
"On": when the device is in normal operation, the indicator light flashes at a frequency of about once per second.
"Comm": when the device has communication data to send and receive, the indicator light flashes.
"L1~L12": the corresponding indicator light will be on in case of short circuit and broken line of any loop
transformer from L1 to L12 and insulation fault.
6.3.3 keys function
There are four keys in the device, namely “RESET/ESC”, “up/down”, “MENU/Enter.”
6.3.4 Operation Instruction
The user interface displays the status of 12 loops, which can be viewed by pressing the up or down key. The
corresponding characters represent the following meanings:
Loop ok Loop open
short circuit
Loop fault
Loop off
Press "Ok" to enter the password input interface. The default password is 0001. Press "OK" to enter the
setting interface.
Keys
Function
RESET/ESC
In non-programming mode, used to return to the superior menu;
In programming mode, used to exit the current operation;
Long press for device reset function.
Up button, down
button
In non-programming mode,used for menuswitching andpassword entering;
In programming mode, used for change values and switching states.
MENU/
In non-programmingmode, press the button toenter the programming mode.
In programming mode, when enter confirm or select the key to use.

15
Password
set loop
set address version
set passsword
If you need to change the Settings, press ok and the character flashes to indicate that you can edit. Users can
change the default password; The address setting range is 1~90; The circuit can be set to open or close. If the
circuit is not connected to the transformer, the circuit can be closed manually. Software versions are used to
distinguish programs. The interface for loop modification is as follows:
loop onloop off
After modifying the default Settings, press the return key to enter the "save or Not" interface. Press the up or
down key to select whether to save the modified Settings.
yes savenot save
If only one fault locator is connected in the system, confirm the connected transformer circuit, manually
close the unconnected circuit, and default to other parameters. If multiple fault locator is connected in the system,
confirm the transformer circuit connected by each fault locator, and manually close the circuit that is not
connected; The address of each fault locator is set to distinguish different fault locators. After setting
modification, exit the setting, select confirm to save, and the fault locator will run automatically.
7 Address table
AIM-T500L Modbus-RTU protocol communication address table is as follows:
Number
Address
Parameter
Read/write
range
Word
1
0000H
Passwords
R
0000-9999 (default:0000)
1
2
0001H high byte
Address
R
1~247 (default:1)
1
0001H low byte
baud rate
R
0~3: 4800, 9600, 19200, 38400
(unit: bps) (default: 9600)
3
0002H high byte
Contrast ratio
R
15-60 (default: 30)
1
0002H low byte
Display time
R
15~250 (unit: second)
(default: 60,15light)
4
0003H high byte
year
R/W
0~99 (unit: year) (default: 0)
1
0003H low byte
month
R/W
1~12 (unit: month) (default: 1)
5
0004H high byte
day
R/W
0~31 (unit: day) (default：1)
1
0004H low byte
warning mark
R
0: no 1: warning 2: warning and alarm
6
0005H high byte
hour
R/W
0~23 (unit: hour) (default: 0)
1
0005H low byte
minute
R/W
0~59 (unit: minute) (default: 0)

16
7
0006H high byte
second
R/W
0~59 (unit: second) (default:0)
1
0006H low byte
data stable
R
0 or 1 (0 invalid, 1 stable)
8
0007H high byte
warning (high 8 bits)
R/W
60~4999 (unit: kΩ) (default: 60)
1
0007H low byte
warning (low 8 bits)
9
0008H high byte
Alarm (high 8 bits)
R/W
10~4999 (unit: kΩ) (default: 38)
1
0008H low byte
Alarm (low 8 bits)
10
0009H high byte
insulation resistance
value (high 8 bits)
R
1~10001 (unit: kΩ)
1
0009H low byte
insulation resistance
value (low 8 bits)
11
000AH
SN (high 16 bits)
R
default：0000000000
1
12
000BH
SN (low 16 bits)
1
13
000CH
reserve
1
14
000DH
leakage capacity
R
0~500 (unit: μF)
1
15
000EH high byte
Broken-line symbol
R
0: no 4:PE/KE broken line
1
000EH low byte
current period
2~500 (unit: s)
16
000FH high byte
access system
R
0: no access system 1: access system
1
000FH low byte
reserve
17
0010H high byte
SOE
1
STA1
R
The sequence number of incident record
1
0010H low byte
R
Incident1content: 0~20: a fault free record
1: early warning2: alarm
18
0011H
insulation
resistance
value
R
incident 1 insulation resistance value 0~early
warning set value (default: 0~50) (unit: kΩ)
1
19
0012H high byte
Year1
R
incident 1 time -year
1
0012H low byte
Month1
R
incident 1 time -month
20
0013H high byte
Day1
R
incident 1 time -day
1
0013H low byte
Hour1
R
incident 1 time -hour
21
0014H high byte
Minute1
R
incident 1 time -minute
1
0014H low byte
Second1
R
incident 1 time -second
22-116
0015H~0073H
The remaining 19 events are recorded in this part of the space, and the rules and
formats are the same as the first.
95
117~120
0074H~0077H
reserve
4
121
0078H high byte
Fault
locatio
n
record
1
Number
R
The sequence number of incident record: 0~19
1
0078H low byte
Locator
R
Locator sequence of record 1: 0~90
122
0079H high byte
Fault loop
R
Locator fault loop of record 1: 1~12
1
0079H low byte
Fault line
R
Fault line of record 1: 01: A 02: B 03: C 04: N
123~160
007AH~009FH
The remaining 19 events are fault locating recorded in this part of the space, and the
rules and formats are the same as the first.
38

17
8 Typical application
8.1 AIM-T500L typical wiring method
N
U
V W
PE
Connect three phase load
AC220V powersupply
?three-phase isolated transformer
N line cannot be grounded
AIM-T500L insulation monitor is applied to the connection
diagram of 3-phase IT system
Note: 1 The source power of meter is AC220V
L1
L2
PE
AIM-T500L insulation monitor is applied to the connection
diagram of single-phase IT system
Explain：Alarm relay output control external alarm indicator (if necessary)
Among them, D01+, D01- control warning lights, D02+, D02- control alarm
warning lights.
D03+ and D03- control the error indicating lamp. The malfunction fault
indicates that the meter itself is out of order.
Generatrix?interconnection
self-check
If the N line is not elicited, access any 2 phase in the 3
RS485 communication can be netted with other
tables and connected to the upper computer
?single-phase isolated transformer
Connect single phase load
AC220V powersupply
RS485 communication can be netted with other
tables and connected to the upper computer
2 In DC System L1 link to + L2 link to -
121314151617
PEKE
2829
B
1918
A
1
U1
2
U2
4
L1
121314151617
PEKE
2829
B
1918
A
1
U1
2
U2
4
L1
CAN Generatrix?interconnection
self-check
CAN
3132 23
F2 24 9
AK
T1T2 F1
5
L2
6 7
H L
3132 23
F2 24 9
AK
T1T2 F1
5
L2
6 7
H L