Acrel ARD2M User manual

472
ARD2M
Motor Protector Operating
Manual V1.1
ACREL Co., Ltd

Declaration
All rights reserved. Without the written permission of the Company, the contents
of any paragraph or section in this manual shall not be copied, copied or disseminated
in any form. Otherwise, all consequences shall be borne by the violator.
Our company reserves all legal rights.
Our company reserves the right to modify the product specifications described in
this manual without prior notice. Before placing an order, please consult your local
agent for new specifications of this product.

Catalog
1 Overview...................................................................................................1
2 Product Features....................................................................................... 1
3 Model Description.................................................................................... 2
4 Main parameters....................................................................................... 3
5 Overall dimensions and installation......................................................... 5
6 Protection function description.................................................................9
7 Function setting and description.............................................................24
8 Communication Settings and instructions..............................................37
9 Features and Functions........................................................................... 69
10 Examples of ordering............................................................................70

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1 Overview
The ARD2M motor protector (hereinafter referred to as the protector) is suitable for
low-voltage motor circuits with rated voltage up to 380V and integrates protection, measurement,
control, communication, operation and maintenance.Its perfect protection function ensures the
safe operation of the motor, with logic programmable function, can meet a variety of control
methods.
The product adopts split structure, which is composed of main body, panel, mutual inductor
and optional communication module, and can adapt to the installation of various cabinets.
Product Implementation standards:
——GB 14048.4-2020 Low-voltage switchgear and control gear -- Part 4-1: Contactors and
motor starters -- Electromechanical contactors and motor starters (including motor protectors);
——JB/T 10736-2007 Low voltage motor protector.
2 Product Features
■ Support fundamental and full-wave power parameter measurement (U, I, P, Q, S, PF, F, EP,
EQ), voltage and current imbalance degree, voltage and current positive sequence, negative
sequence, zero sequence component, three-phase voltage phase Angle, residual current.
■ Protection functions include overload inverse time, overload definite time, grounding, starting
timeout, leakage, underload, locked-rotor, obstruction, short circuit, phase, overflow, imbalance
(current, voltage, power, less power, over voltage, under voltage, phase sequence, temperature,
external fault, tE time, running time alarm, fault alarm.
■ 8 channels programmable DI input, the default use of DC24V power supply, or external active
wet contact can be selected (see the selection table).
■ 5 programmable DO output, to meet the direct starting, star - triangle starting,
auto-transformer starting, and other starting modes, can be through the communication bus to
achieve the master station to the motor remote control "start/stop".
■ Optional anti-shaking function: support immediate restart of shaking power and restart of
voltage loss.
■ MODBUS_RTU and PROFIBUS DPV1 communication modules are available for selection.2
MODBUS_RTU communication channels or MODBUS_RTU+PROFIBUS DPV1
communication modules can be chosen.
■ Optional 1 channels DC4-20MA analog output interface, connected with DCS system, can
realize the monitoring of field equipment.
■ With fault record, start record, stop record, DI displacement record, restart record and other
records of various events, you can view a number of motor operation and maintenance
information.
■ The display interface supports Chinese/English LIQUID crystal display

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3 Model Description
ARD 2 M /
Display module (Table 2)
Current Specification(Table 1)
Design serial number
Enterprise code
The corresponding relation between ARD2M current specification and the rated current and
power of the applicable motor is shown in Table 1:
Table 1
Protector
current
specification
(A)
Ratio
setting
Primary side coil
number of
transformer
Applicable scope of
motor (kW)
Suitable for motor
Rated current range
(A)
1Support 5circle 0.12-999 0.1-5000
5 1cirlce 0.12-999 0.5-5000
25
Does not
support
1cirlce 3-11 6.3-25
100 1circle 15-45 25-100
250 1circle 55-132 63-250
800 1circle 160-250 250-800
Additional function of ARD2M are shown in Table 2:
Table 2
Additional function code Additional function code
Energy metering Ep SOE Event record SR
4-20mA analog output M 1channel Modbus-RTU
communication C
Anti - electric shock
function SU Temperature protection T
Leakage protection L 1channel Profibus-DP
communication CP
Remarks:
(1)Integrated current transformer is used for integrated protector with current specification of
100A and below；The split current transformer is used for the current specification of 100A and
below;
250A and 800A current specifications use another type of split current transformer. For the
external dimensions of the transformer, please refer to the "external dimensions and installation".
(2)The temperature measurement support sensor type is PTC or NTC or PT100.

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(3)After the leakage function (L) is selected, each protector is equipped with a leakage transformer.
The dimensions of the leakage transformer are shown in the section "overall dimensions and
installation". Leakage transformer is equipped with 2m ±10cm secondary line as standard. If
you need other length, please contact the manufacturer.
4 Main parameters
4.1 Technical indicators
ARD2M technical indicators are shown in Table 3:
Table 3
Technical parameters Technical indicators
Protector auxiliary
power supply AC85-265V/DC100-350V
Rated working voltage
of the motor AC220V / 380V，50Hz / 60Hz
Rated operation current
of the motor
1 (0.1A-5000A)
Integrated/Split current transformer
5 (0.1A-5000A)
25(6.3A-25A)
100(25A-100A)
250(63A-250A) Split current transformer
800(250A-800A)
Relay output contact
capacity Impedance load AC250V、10A
Switching input 8 channels of passive dry contact (active DC110V, DC220V, AC220V
input can be optional)
Communication RS485 Modbus_RTU,Profibus_DP
Environment
Working temperature -10ºC～55ºC
Storage temperature -25ºC～70ºC
Relative temperature ≤95 ﹪No condensation, no corrosive
gas
Altitude ≤2000m
Pollution levels 3 level
Protection grade IP65(installed on the cabinet panel)
Installation category III 级
4.2 Functional configuration
ARD2M Functional configuration shown in Table 4:
Table 4
Type
Function
Functional configuration
Standard
function Optional function
Protection
function
Fixed time overload √
Inverse time overload √

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Starting timeout √
Phase loss √
Voltage unbalance √
Current unbalance √
Locked-Rotor √
underload √
External fault √
Block √
Temperature protection(PTC/NTC) √
Residual current(One
only)
grounding √
leakage √(leakage)
Phase sequence √
Under voltage √
Over voltage √
Under power √
Over power √
Te time protection √
Overflow protection √
Alarm of starting times √
Running time alarm √
Fault frequency alarm √
Control
mode
Protection mode √
Direct start mode
√Two-step mode
Two-speed mode
Voltage loss restart √
Communica
tion
function
1 channel Modbus-RTU
communication √
1 channel Profibus-DP communication √
Switching
input 8 channel DI √
Relay
output 5 channel DO √
Analog
output 1 channel DC4-20mA √
Event
record
Start record, stop record, DI
displacement record, restart record,
(support communication transmission)
√

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5 Overall dimensions and installation
5.1 Composition
The product composition of ARD2M is shown in Figure 1, Figure 2:
Figure1 The composition of integrated protector
Figure2 The composition of split protector
5.2 Panel size and opening(Unit:mm)
The shape and opening size are shown in Figure3,4::
Front view Side view
vertical view
Figure 3 Panel size of integrated protector ARD2M

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6
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4
Ua
5
Ub
6
Uc
3
Un
35
AO+
36
AO-
32
T1
33
T2
34
T3
41 43
Ia
44
Ib
45
Ic
2
N
1
L
94 96
D05
95 97
D04
98 11 12 9 10 7 8
D03 D02 D01
14
DI1
15 16 17 18 19 20 21 23 28
A2
29
B2
30 25
A1
26
B1DI2 DI3 DI4 DI5 DI6 DI7 DI8
27
Front view Side view
Vertical view Hole size
Figure 4 Panel size of split protector ARD2M
5.3 Size of installation of current transformer(unit:mm)
5.3.1 The external dimensions of Integrated/split current transformer(100A and below current
specification)are shown in figure 5(Unit:mm):
Figure 5 The external dimensions of Integrated/split current transformer(100A and below current
specification)

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5.3.2 The external dimensions of split current transformer(250A and 800Acurrent specification)are
shown in figure 6(Unit:mm):
Figure 6 The external dimensions of split current transformer(250A and 800Acurrent
specification)
5.3.3The external dimensions of leakage current transformer are shown in figure 7 and table
5(Unit:mm):
Figure 7 The external dimensions of leakage current transformer
The leakage transformer is equipped with a secondary wire of 2m±10cm. If other lengths are
needed, please contact the manufacturer
Table 5
dimension
Spec.
Overall
size(mm)
Go through
size(mm) Installation size(mm) Tolerance (mm) Weight (g)
W H D Φ M N L Φ2
L45 75 75 22 46 65 65 4.3 4 ±1 200±10

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5.4 Terminal
The wiring terminal arrangement of the ARD2M main body is shown in Figure 8
Figure 8 The wiring terminal arrangement of ARD2M
See Table 6 for the ARD2M terminal number and function definition:
Table 6
Terminals
NO. Function definition Remark
1 Power input L (+ at DC time) The auxiliary power supply is
connected to the two terminals
2 Power input N (- at DC time)
3 Un input
Three-phase voltage input
4 Ua Phase voltage input
5 Ub Phase voltage input
6 Uc Phase voltage input
7、8 DO1，Start 1 output
5-channel programmable relay
output (DO)
(The function is defined as factory
default setting, which can be set by
users according to their needs)
9、10 DO2，Start 2 output
11、12 DO3，Alarm output
97、98 DO4，Trip output, normally open point signal
94、95、96 DO5，Trip output, normally closed+normally
open with common end
14 DI1，Stop signal input
15 DI2，Start 1 signal input
16 DI3，Start 2 signal input
17 DI4，Emergency stop signal input
18 DI5，Reset signal input
19 DI6，Control permission 1 input
20 DI7，Control permission 2 input
21 DI8，External fault signal input
23 COM2，DI Input common terminal
35 Analog output AO+ 4-20mA analog output
36 Analog output common end AO-
25 A1 First channel MODBUS
communication
26 B1
28 A2 Second channel MODBUS
4
Ua
5
Ub
6
Uc
3
Un
35
AO+
36
AO-
32
T2
33
T1
34
GND
41 43
Ia
44
Ib
45
Ic
2
N
1
L
94 96
D05
95 97
D04
98 11 12 9 10 7 8
D03 D02 D01
14
DI1
15 16 17 18 19 20 21 23 28
A2
29
B2
30 25
A1
26
B1DI2 DI3 DI4 DI5 DI6 DI7 DI8
27

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communication29 B2
32 T1(PTC input A) Temperature protection (thermistor
input)
33 T2(PTC input B)
34 GND
41 IO*leakage current input Leakage current input
43 Ia Phase current input
44 Ib Phase current input
45 Ic Phase current input
6 Protection function description
The default action stages of each protection are shown in Table 7:
Table 7
Protection type Default active
period
Overvoltage, undervoltage, voltage imbalance, phase sequence, external
fault, overflow protection, starting times, fault times, running time,
PTC/NTC temperature protection
whole course
Reverse time overload, locked rotor, phase break, leakage, grounding,
starting timeout, short circuit, overflow protection,
Overvoltage, undervoltage, voltage imbalance, phase sequence, external
fault, number of starts, number of faults, running time, PTC/NTC
temperature protection, fixed time overload
When starting
Reverse time-limit overload, blocking, phase break, current imbalance,
leakage, grounding, constant time-limit overload, underload, short circuit,
overflow protection, overvoltage, undervoltage, voltage unbalance, phase
sequence, underpower, overpower, external fault, PTC/NTC temperature
protection, number of starts, number of faults, running time
In operation
6.1 Inverse time overload protection
When the motor runs for a long time in excess of its rated current under excessive load, it
will overheat the motor, reduce insulation and burn it out. The protector calculates the heat
capacity of the motor according to its heating characteristics and simulates its heating
characteristics to protect the motor.
The starting condition of reverse time-limit overload protection is that the maximum
three-phase current reaches the set overload starting value, and the default overload starting value
is 1.2 times the motor's rated current.
The current-time comparison table of overload protection is shown in Table 8, and the
overload characteristic curve (K curve) is shown in Figure 9:
Table 8
Optional
tripping curve
grade K
1 2 3 5 10 15 20 25 30 35 40

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Tripping
delay(S)tolera
nce ±10%
Three - phase balanced load, starting from the cold state
Rated value
Ie×1.2 25 50 75 125 250 375 500 625 750 875 1000
×1.5 16 32 48 80 160 240 320 400 480 560 640
×2 9 18 27 45 90 135 180 225 270 315 360
×3 4 8 12 20 40 60 80 100 120 140 160
×4 2.26 4.52 6.78 11.3 22.5 33.8 45 56.3 67.5 78.8 90
×5 1.44 2.88 4.32 7.2 14.4 21.6 28.8 36 43.2 50.4 57.6
×6 1 2 3 5 10 15 20 25 30 35 40
×7.2 0.7 1.4 2.1 3.5 6.9 10.4 13.9 17.4 20.8 24.3 27.8
0
100
200
300
400
500
600
700
800
900
1000
Ie × 1.2 × 1.5 × 2 × 3 × 4 × 5 × 6 × 7.2 × 8
Figure 9 Characteristic curve of overload (K curve)
Inverse time overload protection improves manual and automatic reset options.When
"automatic" is selected, after the overload trip of the motor, the heat capacity will be automatically
reset to less than 15%, and the restart operation can be allowed without the need for further reset
operation;When "manual" is selected, after the motor overload trip, the heat capacity will be
reduced to less than 15%. Manual manual reset is required, otherwise the restart operation is not
allowed.

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Note:
Imax:Maximum three-phase current
Is:Overload starting fixed value
Heat:Percentage heat capacity
Hs:Heat capacity alarm value
TS:Starting shield time
tE Time protection
For the increased safety type motor, after the ac winding reaches the rated operating stable
temperature at the highest ambient temperature, the time required from the beginning of passing
through the blocking current until it rises to the limit temperature is tE time.The tE time of the
increased safety motor is usually provided by the motor manufacturer, and the user can find this
data on the motor nameplate.
It provides thermal overload protection of disconnecting the power supply of the motor
within tE time during lock-in. It is only put in after the motor is started, with an independent delay
timer.The motion delay comparison of tE protection characteristic curve is shown in Table 9, and
the curve is shown in Figure 10:
2 3 4 5 987
2
3
5
8
2
5
10
20
50
t(S)
tEp(S)
15
12
100
A
I /I
Figure 10 tE Protection delay to blocking current ratio IA/Ie Current-time characteristic curve
Instructions:tEp:7 times of the rated current allowed lock-in time;IA:Locked-rotor current;
Ie:Rated current of the motor.
Table 9
tEp Set
IA/Ie
2(S) 3(S) 4(S) 5(S) 6(S) 8(S) 10(S) 12(S) 15(S)
2.0 32 48 64 80 96 128 160 192 240
2.2 20.27 30.4 40.54 50.67 60.81 81.08 101.35 121.62 152.02
2.4 14.75 22.12 29.5 36.87 44.25 59 73.75 88.5 110.63
2.6 11.54 17.32 23.09 28.87 34.64 46.19 57.74 69.29 86.62
2.8 9.46 14.19 18.92 23.65 28.39 37.85 43.31 56.78 70.97

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3.00 8 12 16 20 24 32 40 48 60
3.20 6.91 10.37 13.83 17.29 20.75 27.67 34.59 41.51 51.88
3.40 6.08 9.13 12.17 15.22 18.26 24.35 30.44 36.52 45.66
3.60 5.43 8.14 10.86 13.58 16.29 21.72 27.16 32.59 40.74
3.80 4.9 7.35 9.8 12.25 14.7 19.6 24.5 29.41 36.76
4.00 4.46 6.69 8.93 11.16 13.39 17.86 22.32 26.79 33.48
4.20 4.09 6.14 8.19 10.24 12.29 16.39 20.49 24.59 30.74
4.40 3.79 5.68 7.58 9.47 11.37 15.06 18.95 22.74 28.42
4.60 3.52 5.28 7.05 8.81 10.57 14.1 17.62 21.15 26.43
4.80 3.29 4.94 6.59 8.24 9.88 13.08 16.48 19.77 24.72
5.00 3.09 4.64 6.19 7.74 9.29 12.38 15.48 18.58 23.22
5.20 2.92 4.38 5.84 7.3 8.76 11.68 14.6 17.53 21.91
5.40 2.76 4.15 5.53 6.91 8.3 11.07 13.83 16.6 20.75
5.60 2.63 3.94 5.26 6.57 7.89 10.52 13.15 15.78 19.73
5.80 2.5 3.76 5.01 6.27 7.52 10.03 12.54 15.05 18.81
6.00 2.4 3.6 4.8 6 7.2 9.6 12 14.4 18
6.20 2.3 3.45 4.6 5.75 6.9 9.2 11.51 13.81 17.26
6.40 2.21 3.32 4.42 5.53 6.64 8.85 11.07 13.28 16.6
6.60 2.13 3.2 4.27 5.33 6.4 8.54 10.67 12.81 16.01
6.80 2.06 3.09 4.12 5.16 6.19 8.25 10.32 12.38 15.48
7.00 2 3 4 5 6 8 10 12 15
8.00 2 3 4 5 6 8 10 12 15
9.00 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2
Note:
(1)The action time of tE protection = the action time /2×tEp when tEp is 2 (S)
(2)When tE is set at 5 (S), the tE value determined according to the starting current ratio IA/ Ie is
in accordance with iEC79-7 and GB3836.3-2000 standards. When it is used for tE time protection
of increased safety motor, its inverse time overload protection can be set according to this
characteristic curve.In order to ensure that the power is disconnected before tE time during the
motor's lock-in, the inverse time curve of the overload protection device should be lowered by
about 15%.
(3)The action time of tE protection is achieved by setting "motor type" and "trip level", and the
corresponding trip curve is selected by setting tEp (trip level) according to Table 9.(When the
motor type is selected as "increased security motor", the tripping level will automatically change
to tEp setting;Otherwise, the trip curve is the reverse time-limit overload trip curve of ordinary
motor.

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Note:
Imax:Maximum three-phase current
In:Rated current
Heat:Percentage heat capacity
Hs:Heat capacity alarm value
6.2 Start timeout protection
When the starting time of the motor reaches the starting time set by the user, the average
three-phase current does not drop below the set tripping threshold, trigger the starting timeout
protection, issue tripping command, and stop the motor operation.For the increased safety motor,
the starting time setting shall not exceed 1.7 times tE time.
Note:
Iav:Three-phase mean current
Is:Set trip threshold
Ts:Starting time
6.3 Locked-rotor protection
In the process of starting, if the motor shaft is stuck due to excessive load or mechanical
reasons, and the fault is not removed in time, the motor will overheat and the insulation will be
reduced and the motor will be burned out.The locked-rotor protection is applicable to the motor
when such faults occur in the starting stage. When the average current percentage reaches the set
threshold, the protector will trip or alarm within the set time in time to avoid the motor burning
out.

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Note:
Iav:Three-phase mean current
Is1:Alarm action threshold
Is2:Tripping threshold
Ts1:Alarm action delay time
Ts2:Delay time of trip action
6.4 Blocking protection
During the operation of the motor, if the motor shaft is stuck due to excessive load or
mechanical reasons, and the fault is not removed in time, the motor will be overheated and the
insulation will be reduced and the motor will be burned out.The blocking protection is applicable
to protect the motor when such faults occur in the running stage. When the average current reaches
the set threshold, the protector will trip or alarm within the set time in time to avoid the motor
burning out.
Note:
Iav:Three-phase mean current
Is1:Alarm action threshold
Is2:Tripping threshold
Ts:Alarm action delay time

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6.5 Underload protection
The protector provides underload protection when the motor is loaded with pumping load.
When the average three-phase current is lower than the set value, the protector should trip or
alarm within the set time.
Note:
Iav: Three-phase mean current
Is1: Alarm action threshold
Is2: Tripping threshold
Ts1: Delay time of alarm action
Ts2: Delay time of trip action
6.6 Underpower protection
When the load power is lower than the set action value, the protector will trip or alarm during
the set action time.
Note:
P: Total active power
Ps1: Alarm action threshold
Ps2: Trip action threshold
Ts1: Delay time of alarm action
Ts2: Delay time of trip action

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6.7 Overload protection
In addition to reverse Overload protection, the protector can also provide time-limit overload
protection. When the percentage of three-phase average current and rated current is greater than
the set value, the protector should trip or alarm within the set time.
Note:
Iav: Three-phase mean current
Is1: Alarm action threshold
Is2: Tripping threshold
Ts1: Delay time of alarm action
Ts2: Delay time of trip action
6.8 Overpower protection
When the percentage of load power to rated power is greater than the set action value, the
protector will trip or alarm during the set action time.
Note:
P: Total active power
Ps1: Alarm action threshold
Ps2: Trip action threshold
Ts1: Delay time of alarm action
Ts2: Delay time of trip action

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6.9 Ground fault protection
The protector is protected by the ground current according to the three-phase current vector
and the calculation of the ground current.The grounding protection can set the starting shielding
time. After the starting shielding time, when the grounding current is greater than the set value, the
action logic can choose the breaker or breaker or alarm. When the breaker is chosen, the protector
should first switch the breaker and then switch the contactor after 200ms
Note:
Ig: Ground current
Is1: Alarm action threshold
Is2: Tripping threshold
Ts1: grounding start shielding time
Ts2: Delay time of alarm action
Ts3: Delay time of trip action
6.10 Leakage protection
Leakage protection should be equipped with leakage current transformer, which can detect
the leakage current through the zero-sequence transformer.The leakage protection can set the
starting shielding time. After the starting shielding time, when the leakage current is greater than
the set value, the operation logic can choose the breaker or breaker or alarm. When the breaker is
chosen, the protector should first switch the breaker and then the breaker after 200ms.
Note:
IL: Leakage current
Is1: Alarm action threshold