Acrel ASJ Series Owner's manual

041
ASJ Series Residual Current
Operated Relay
Installation and Operation
Instruction V1.9
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.

Contents
1 Introduction........................................................................................................................................1
2 Types of Products...............................................................................................................................1
3 Technical parameters..........................................................................................................................2
4 Installation and connection................................................................................................................2
4.1 Shape and Installation Dimensions..........................................................................................2
4.2 Installation Instructions............................................................................................................3
4.2.1 Installation Steps............................................................................................................3
4.2.2 Installation of accessories..............................................................................................4
4.3 Terminals and wiring ...............................................................................................................4
4.4 Matters needing attention.........................................................................................................4
5 Operating Guide.................................................................................................................................5
5.1 Description of AC type Panel ..................................................................................................5
5.2 Description of A-type panel.....................................................................................................5
5.3 Description of LCD type panel................................................................................................5
5.4 Description of Selection...........................................................................................................6
5.5 Instructions for the selection of transformer............................................................................7
6 Typical applications ...........................................................................................................................8
7 Programming menu............................................................................................................................8
7.1 Programming Example ............................................................................................................9
7.2 Programming Example ..........................................................................................................12
8 Communication Guide.....................................................................................................................13
8.1 Overview of Communication Protocol..................................................................................13
8.2 Introduction to function code.................................................................................................14
8.3 Communication Address Table..............................................................................................15
9 Ordering example.............................................................................................................................16

1
ASJ series residual current operated relay
1 Introduction
ASJ series residual current operated relay can be combined with low voltage circuit breaker or
low voltage contactor to form a residual current protection device, which is mainly used for the TT
and TN system distribution lines with AC 50Hz and rated voltage of 400V and below. It is used to
protect the electrical circuit form ground faults, prevent equipment damage caused by earth fault
current and electrical fire accidents, and can also be used to provide indirect contact protection
against personal electric shock hazard.
Products meet the requirements of GB/T 22387-2016 residual current operated relay.
2 Types of Products
Type
Function
Installation
Appearance
ASJ10-LD1C
AC-type residual current measurement;
Alarm prompt of current crossing line;
Rated residual operating current can be measured;
Limit non-driving time can be set;
Two sets of relay output;
With local and remote “test”and “reset”functions.
Guide
(DIN
35mm)
ASJ10-LD1A
A-type residual current measurement;
Current percentage light column display;
Rated residual operating current can be measured;
Limit non-driving time can be set;
Two sets of relay output (settable)note 1;
With local and remote “test”and “reset”functions.
ASJ10L-LD1Anote2
A-type residual current measurement;
Rated residual operating current can be measured;
Limit non-driving time can be set;
Two sets of relay output (settable);
Transformer breakage alarm can be set;
Pre-alarm value can be set;
Return value can be set.
With on-site display, remote "test", "reset"
LCD display, 25 event records.
ASJ20-LD1C
AC-type residual current measurement;
Alarm prompt of current crossing line;
Rated residual operating current can be measured;
Limit non-driving time can be set;
Two sets of relay output;
With local and remote “test”and “reset”functions.
Panel
(48*48)

2
ASJ20-LD1A
A-type residual current measurement;
Current percentage light column display;
Rated residual operating current can be measured;
Limit non-driving time can be set;
Two sets of relay output (settable)note 1;
With local and remote “test”and “reset”functions.
Note 1: The function of setting for relay means that you can set the initialization and the output state of relay by yourself through the
code dialing on the panel; the specific setting guide can be found from the chapter 5.2.
Note 2: Optional function, RS485 interface, Modbus-RTU Communication, type is ASJ10L-LD1A/C
3 Technical parameters
Technical Parameter
Indicator
AC type
A type
Power
supply
Voltage range
AC110V、AC220V
（±10%）
AC/DC85~265V
Power dissipation
≤5W
Input
Rated residual
operating current I△n
0.03、0.1、0.3、0.5(A)
0.03、0.05、0.1、0.3、0.5、1、3、
5、10、30(A)note 3
Limit non-driving
time △t
0.1、0.5(s)
0、0.06、0.1、0.2、0.3、0.5、0.8、
1、4、10(s)note 4
Rated residual
non-operating
current I△no
50%I△n
50%I△n
Performance
characteristics
Sinusoidal AC
Sinusoidal AC and pulsating DC
Frequency
50Hz±5Hz
50Hz±5Hz
Operating range
-20% ~ -10%I△n
-20% ~ -10%I△n
Output
Output mode
One is normally open and another is
for transformation
One is normally closed or open,
and another is for transformation
Contact capacity
5A 250VAC
5A 30VDC
AL1:8A 250VAC; 5A 30VDC
AL2:6A 250VAC; 5A 30VDC
Reset mode
Local reset or remote reset
Local reset, remote reset or
automatic reset
Installation
and use
environment
Temperature
Run temperature：-20℃ ~ +55℃，Storage temperature：-30℃ ~ +70℃
Humidity
≤95%RH，no condensation, and no corrosive gas places
Elevation
≤2000m
Class of pollution
Grade three
Installation category
Type Ⅲ
Note 3: ASJ10L-LD1A rated residual operating current IΔn is 10mA~30A continuously adjustable;
Note 4: ASJ10L-LD1A limit non-driving time Δt is 0~10S continuously adjustable.
4 Installation and connection
4.1 Shape and Installation Dimensions
Shape and Installation Dimensions is seen picture blow.

3
Pic 1 ASJ20 Shape and hole size Pic 2 ASJ10 Shape and Installation size
The specific size of the meter is shown in the table below.
type
Panel size (mm)
Shell size (mm)
Hole size (mm)
ASJ10
/
85*54*64 (length*width*height)
/
ASJ20
48*48 (Width*Height)
43.8*43.8*100 (width*height*depth)
45*45 (Width*Height)
4.2 Installation Instructions
4.2.1 Installation Steps
ASJ20 series instrument installation method is panel installation, both sides of the buckle
extrusion fixed, the specific operation is as follows:
1) On the switchboard, choose the appropriate place to cut the 45mm*45mm mounting hole;
2) Take out the remaining current relay and remove the fixed buckle;
3) Install the instrument into the distribution board, and then install it with a buckle.
The specific operation is shown in the figure below.
ASJ10 series meters are mounted by the standard DIN-35mm guide rail.

4
4.2.2 Installation of accessories
Accessories include residual current transformers and magnetic rings. The remaining current
transformer passes through all the phase lines and neutral lines, and is installed in the cabinet with a
firm fixation. The secondary side wiring is connected to terminals 40 and 41 of the instrument
through a magnetic ring. The installation method of the magnetic ring is shown in the figure below.
It is installed near the end of the instrument wiring and the wiring bypasses the magnetic ring for
two laps.
4.3 Terminals and wiring
4.3.1 Auxiliary power supply and signal input terminal
Auxiliary power supply Signal input
4.3.2 Switching quantity input/output terminal
DI1 DI2 COM1
24 25 33
Relay output terminal Switching input terminal
(no auxiliary power supply) (Only ASJ10L-LD1A)
AL1: Alarm relay
AL2：warning relay
4.3.3 Additional functional terminals
21 22
RS485通讯
AB
Remote test remote reset RS485 interface
(Only ASJ10L-LD1A)
4.4 Matters needing attention
A) The grounding wire (PE) shall not penetrate the remaining current transformer.
B) For single-phase power grid, only phase lines and neutral lines need to penetrate the residual
current transformer.
C) ASJ10L-LD1A/C provides RS485 communication interface and adopts Modbus-RTU
protocol. No more than 128 instruments can be connected on one line at a time.

5
5 Operating Guide
5.1 Description of AC type Panel
No.
Name
Function
ASJ20-LD1C ASJ10-LD1C
1
Power light
Lights continuously when
the working power supply
is normal
2
Reset button
To reset the system
3
Alarm light
Lights when the rated
residual operating current
I△nis exceeded
4
Test button
To test whether the
indicator light is normal,
and the relay can operate.
5
residual current
set switch
Providing four settings of
residual operating current
6
Limit
non-driving
time set switch
Providing two settings of
limit non-driving time
5.2 Description of A-type panel
No.
Name
Function
ASJ20-LD1A
ASJ10-LD1A
1
Power light
Lights continuously when the working power
supply is normal
2
Rest button
To reset the system
3
Alarm light
Lights when the rated residual operating current
I△nis exceeded
4
Test button
To test whether the indicator light is normal, and
the relay can operate normally.
5
residual current
set switch
Providing four settings of residual operating
current
6
limit
non-driving
time set switch
Providing two settings of limit non-driving time
7
Dial switch
dial
Relay AL2
Relay AL1
State
A
B
10
9
97
96
95
0
0
0
1
1
0
warning
1
1
alarm
C
0: manual reset, 1: automatic reset
D
reserve
8
Indicator light
with streamer
Three green LEDs are combined to show the
current percentage, which will flash when the
current reaches more than 50%, indicating early
warning.
5.3 Description of LCD type panel
No.
Name
Function
1
Run light
Work often light, communication light flashing
2
Alarm light
Red indicator light, it lights when the leakage
current reaches the alarm value

6
3
Disconnected
alarm light
Red indicator light, it lights when the external
transformer is disconnected
ASJ10L-LD1A
4
Test key
In normal operation, press key for 2s, then the
current channel relay will operate, backlight will
turn red, and alarms will be output. used to check
the relay and alarm trip
5
Reset key
In operation mode, used to relieve relay operation;
In programming mode, used to return to previous
menu or mode.
6
Td/- key
In SOE page of operation mode, it is used to view
the fault records;
In programming mode, it is used to enter next
menu or subtract 1 from the value;
7
Td/+ key
In SOE page of operation mode, it is used to view
the fault records;
In programming mode, it is used to back last menu
or add 1 from the value.
Long press the Td/- key and Td/+ key at the same
time, system will start a self-check and reset.
8
PROG key
In operation mode, short press the key to enter
SOE interface;
In programming mode, it is used to select, return,
confirm and save menu item.
9
LCD
The LCD can display the real-time residual current
value, rated residual current setting value, limit
non-driving time setting value and communication
status. The LCD backlight is green in normal
operation. When alarming, the residual current
reaches the alarming value, and the backlight is
red. When the residual current reaches the warning
value, and the backlight is yellow.
Note:
When the rated residual current is set to be 30mA, the action delay time is invalid, and operate immediately by default.
When there is an alarm indication of transformer disconnection, the “TEST” button is locked and invalid.
5.4 Description of Selection
1) The device is mainly used in system protection, as the protection of direct electric shock,
indirect electric shock, electrical fire and hierarchical protection. For directing shock protection only
as supplementary protection, the rated residual operating current at this time does not exceed 30mA.
2) Protective devices must be installed in the following equipment and places: mobile electrical
equipment and hand-held power tools, electrical equipment used in production, electrical and
mechanical equipment in construction sites, electrical equipment installed outdoors, etc. (See
GB13955 for details).
3) The rated remaining operating current shall fully consider the normal leakage current value
Acrel
ASJ10 Run
Alarm1
Alarm2
Trip
TEST RESET Id/+
Id/- □/PROG
9
4
5
6
7
8
1
2
3

7
of the system. Generally not less than 2~4 times of the maximum measured residual current: 4 times
of the branch line; Branch line 2.5 times; Main line 2 times. According to the empirical formula:
Single-phase circuit: I△n≥In/2000 (lighting)
Three-phase loop: I△n≥In/1000 (power or power lighting hybrid) I△nis the maximum current.
4) In order to ensure the selectivity of hierarchical protection action, the current and time
coordination between the upper and lower levels shall conform to the following provisions:
I△n1 (upper) ≥I△n2 (lower)
tF (upper ASJ return time) > tFA (low ASJ break time), the time difference is not less than 0.2s.
General branch line and end: 30~100mA, ≤0.1s;Branch line: 300~500mA, 0.2~0.8S;
Main line: 500~1000mA, ≤2s.
5）System Selection Instructions
Type of
system
Wiring of system
description
TT system
ASJ is recommended. The earth fault
current is very small and difficult to be
estimated, operating current can not be
reached, and the hazardous voltage will
appear on the shell.
TN-S
system
ASJ can be used. cut off the fault more
quickly and sensitively, improve the safety
and reliability. PE line is not allowed to pass
through the transformer.
TN-C
system
ASJ can not be used, if PEN line is not
iterative earthing, the ASJ refuse to operate;
if PEN line is iterative earthing, ASJ will be
misoperated.
TN-C-S
system
If it is the TN-C system in front of the point
F, ASJ is not allowed; if it is the TN-S
system at the back of point F, ASJ can be
used, but PE line cannot pass through the
transformer.
IT system
ASJ can be applied. The insulation
monitoring device is applied firstly and the
residual current device is applied to prevent
the reduction of insulation in the system and
make it the secondary backup protection,
5.5 Instructions for the selection of transformer
type
hole
Main loop rated current
ratio
AKH-0.66L45
45mm
80A
1A:1mA