Veichi JT550 Series User manual

JT550 Series Inverter Manual
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Preface
The JT550 is a high-performance and multipurpose industrial product aiming to
integrate synchronous motor drive with asynchronous motor drive, and torque
control, speed control with position control. It is designed with advanced vector
control technology and the latest digital processor dedicated for motor control, thus
enhancing product reliability and adaptability to the environment.
The JT550 adopts customized and industrialized design to realize excellent control
performance through optimized functions and flexible applications.
JT550 uses high power density design. Some power ranges carry built-in DC reactor
and brake unit to save installation space. Through overall EMC design, it can satisfy
the low noise and low electromagnetic interference requirements to cope with
challenging grid, temperature, humidity and dust conditions, thus greatly improving
product reliability.
This operation manual presents installation wiring, parameter setup, fault diagnosis
and trouble shooting, and precautions related to daily maintenance. Read through
this manual carefully before installation to ensure the AC Drive is installed and
operated in a proper manner to give full play to its excellent performance and
powerful functions.
It is the responsibility of the user or machine builder or installation contractor or
electrical designer/engineer to take all necessary precautions to ensure that the
system complies with current standards, and to provide any devices (including safety
components), required to ensure the overall safety of the equipment and personnel.
If there is any doubt with regards to the software version or the manual contents,
please contact us.

Safety Instructions JT550 Series Inverter Manual
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Safety Information and Precautions
Safety definition
DANGER
It is essential for avoiding a safety hazard. Serious physical injury or even death may occur if
related requirements are not followed.
WARNING
It is necessary for avoiding a risk of damage to the product or other machine.
WARNING
As high voltage still presents in the bus capacitor after power off, wait for at least five minutes (or
15 min / 25 min, depending on the warning symbols on the machine) after power off to prevent electric
shock.
Electrical Safety
Extreme care must be taken at all times when working with the AC Drive or within the area of the AC
Drive. The voltages used in the AC Drive can cause severe electrical shock or burns and is potentially
lethal. Only professional and qualified personnel should be allowed to work on AC Drives.Read the
operation manual before operating on the equipment.
The guidelines and recommendations should be followed in order to gain long term trouble free operation
as the lifetime of the AC Drive is dependent on the working environment and correct handling of the
product in the initial installation stage.
Delivery and installation
Select appropriate tools for delivery and installation to ensure a safe and proper running of the
AC Drive and avoid physical injury or death. To ensure physical safety, the installation staff should take
mechanical protective measures, wearing exposure shoes and working uniforms;
R, S and T are the power input terminals, and U, V and W are output motor terminals. Connect
the input power cables and motor cables properly; otherwise, damage to the AC Drive may occur.
Connect the optional brake parts (brake resistors, brake units or feedback units) according to the wiring
diagram.Do not touch the AC Drive with wet items or body parts; otherwise, electric shock may occur.
When using an earth leakage circuit breaker, use a residual current operated protective device (RCD) of
type B (breaker which can detect both AC and DC). Leakage current can cause unprotected components to
operate incorrectly. If this is a problem, lower the carrier frequency, replace the components in question
with parts protected against harmonic current, or increase the sensitivity amperage of the leakage breaker
to at least 200 mA per drive.

JT550 Series Inverter Manual Safety Instructions
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Adjusting AC Drive Parameters
Disconnect all power sources applied to the AC Drive before terminal wiring, and wait for at least the time
designated on the AC Drive after disconnecting the power sources.
High voltage presents inside the AC Drive during running. Do not carry out any operation on the AC Drive
during running except for keypad setup.
This manual provides a complete list of the parameters with functional description and care should always
be taken whenever parameters are adjusted during a live running startup. Juditech can provide product
training and if in doubt seek advice.
Maintenance and component replacement
Only well-trained and qualified professionals are allowed to perform maintenance, inspection, and
component replacement on the AC Drive.
Take measures to prevent screws, cables and other conductive matters from falling into the AC Drive
during maintenance and component replacement.
Do not perform wiring, inspection or component replacement when power supply is applied. Ensure all the
input power supplies are disconnected before wiring and inspection, and wait for at least the time
designated on the AC Drive or until the DC bus voltage is less than 36V. The minimum waiting time is
listed in the table below.
AC Drive Model Minimum waiting time
0.75kW-110kW 5min
132kW-315kW 15min
Above 355kW 25min

Contents JT550 Series Inverter Manual
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Contents
Preface............................................................................................................................................................ - 1 -
Safety Information and Precautions............................................................................................................... - 2 -
Contents..........................................................................................................................................................- 4 -
Chapter 1 Product Information .......................................................................................................................- 5 -
1.1 Product Type Identification............................................................................................................- 5 -
1.2 Product Nameplate .........................................................................................................................- 5 -
1.3 JT550 Inverter Series ..................................................................................................................... - 6 -
1.4 Product Description ........................................................................................................................- 7 -
1.6 Product Appearance and Dimensions .......................................................................................... - 10 -
1.7 Keyboard Appearance and Dimensions ....................................................................................... - 13 -
1.8 Appearance and Hole Size of the Keyboard Tray........................................................................ - 13 -
1.9 Appearance and Dimensions of the Double Display Keyboard and Tray....................................- 14 -
Chapter 2 Mechanical Installation ................................................................................................................- 15 -
2.1 Installation Environment..............................................................................................................- 15 -
2.2 Installation Space and Directions .................................................................................................- 15 -
2.3 Dismantling of the Cover Plate .................................................................................................... - 17 -
Chapter 3 Electrical Installation ................................................................................................................... - 18 -
3.1 Electrical Installation................................................................................................................... - 18 -
3.2 Description of Peripheral Electrical Devices ............................................................................... - 19 -
3.3 Peripheral Electrical Components Selection Guidance ............................................................... - 20 -
3.4 Selection of Braking Unit and Braking Resistor ..........................................................................- 20 -
3.5 Selection of Expansion Card ........................................................................................................- 22 -
3.6 Wiring Method............................................................................................................................. - 23 -
Chapter 4 Keyboard and Display ..................................................................................................................- 36 -
4.1 Operation and Display Interface .................................................................................................. - 36 -
4.2 Keyboard Indicators Description................................................................................................. - 37 -
4.3 Keyboard Button Description...................................................................................................... - 37 -
4.4 Viewing and Modifying Function Codes ..................................................................................... - 37 -
4.5 Selecting Menu Mode .................................................................................................................. - 38 -
Chapter 5 Basic Operation and Test Run ......................................................................................................- 39 -
5.1 Quick Adjustment Guidance........................................................................................................ - 39 -
5.2 Precautions Before Power-On ......................................................................................................- 40 -
5.3 Display Status After Power-On ....................................................................................................- 40 -
5.4 Motor Control Methods Selection ................................................................................................- 40 -
5.5 Initialization of Parameters .......................................................................................................... - 42 -
5.6 Operation Commands Source Selection ...................................................................................... - 42 -
5.7 Frequency Source Selection .........................................................................................................- 43 -
5.8 Stop Modes Selection ...................................................................................................................- 45 -
5.9 Observation of Operation Status via DO and AO ........................................................................ - 45 -
Chapter 6 Function Parameter List ...............................................................................................................- 46 -
Chapter 7 Function Parameter List ...............................................................................................................- 75 -
Chapter 8 Maintenance and Troubleshooting...............................................................................................- 97 -
8.1 Daily Maintenance and Inspection of JT550............................................................................. - 122 -
8.2 Warranty ..................................................................................................................................... - 123 -
8.3 Faults and Solutions ................................................................................................................... - 123 -
Appendix A: MODBUS Communication Protocol .................................................................................... - 129 -
1.1 Protocol Contents ....................................................................................................................... - 129 -
1.2 Communication Frame Description ........................................................................................... - 129 -
1.3 Communication Data Address Definition .................................................................................. - 132 -
1.4 Description of Group FD Communication Parameters ..............................................................- 134 -

JT550 Series Inverter Manual Chapter 2 Mechanical Installation
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Chapter 1 Product Information
1.1 Product Type Identification
JT550 - T3 - 011G / 015 P B
JT550 series AC Drive
Mark Volta
g
e Class
T3 Three-
p
hase 380V
S2 Single-phase 220V
G：General type
P：Special type
Mark With Built-in Braking Unit
B Yes
Blank No
This is an example of the nameplate of standard JT550 products.
Figure 1.1 Product Model Name
1.2 Product Nameplate
MODEL: JT550-T3-011G/015PB
INPUT: 3PH AC 380V 26A 50Hz/60Hz
OUTPUT1: 3PH AC 0~380V 25A 0~300Hz
OUTPUT2: 3PH AC 0~380V 32A 0~300Hz
SN: 10174100209000002
Model
Rated input
Rated output1
Rated output2
Series NO.
Manufacturer
Nameplate
Figure 1.2 Product type identification
Note:
Built-in brake unit is included in standard configuration of 380V 22kW and below models;Brake unit is not
included in standard configuration of 380V 30kW and 37kW models (optional built-in brake unit is available,
suffix "-B" indicates optional built-in brake unit).
Quanzhou Ausenist Technology Co., Ltd

Chapter 2 Mechanical Installation JT550 Series Inverter Manual
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1.3 JT550 Inverter Series
Product Model Input current (A) Output current (A) Motor (kW)
JT550-S2-0R4GB 5.4 2.3 0.4
JT550-S2-0R7GB 8.2 4 0.75
JT550-S2-1R5GB 14 7 1.5
JT550-S2-2R2GB 23 9.6 2.2
Product Model Input current (A) Output current (A) Motor (kW)
JT550-T3-0R7G/1R5PB 3.4 2.1 0.75
JT550-T3-1R5G/2R2PB 5 3.8 1.5
JT550-T3-2R2G/4R0PB 5.8 5.1 2.2
JT550-T3-4R0G/5R5PB 10.5 9 3.7
JT550-T3-5R5G/7R5PB 14.6 13 5.5
JT550-T3-7R5G/011PB 20.5 17 7.5
JT550-T3-011G/015PB 26 25 11
JT550-T3-015G/018PB 35 32 15
JT550-T3-018G/022PB 38.5 37 18.5
JT550-T3-022G/030PB 46.5 45 22
JT550-T3-030G/037P 62 60 30
JT550-T3-037G/045P 76 75 37
JT550-T3-045G/055P 92 91 45
JT550-T3-055G/075P 113 112 55
JT550-T3-075G/090P 157 150 75
JT550-T3-090G/110P 180 176 90
JT550-T3-110G/132P 214 210 110
JT550-T3-132G/160P 256 253 132
JT550-T3-160G/185P 307 304 160
JT550-T3-200G/220P 385 377 200
JT550-T3-220G/250P 430 426 220
JT550-T3-250G/280P 468 465 250
JT550-T3-280G/315P 525 520 280
JT550-T3-315G/355P 590 585 315
JT550-T3-355G/400P 665 650 355
JT550-T3-400G/450P 785 725 400
JT550-T3-450G 883 820 450
JT550-T3-500G 910 900 500
JT550-T3-560G 1100 1020 560
JT550-T3-630G 1160 1120 630
JT550-T3-710G 1171 1260 710
Table 1.1 JT550 Models and Specs

JT550 Series Inverter Manual Chapter 2 Mechanical Installation
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1.4 Product Description
Figure 1.3 Components of Plastic Case Model
Figure 1.4 Components of the Metallic Case Model

Chapter 2 Mechanical Installation JT550 Series Inverter Manual
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1.5 Technical Specifications
Table 1.2 Technical Specifications of JT550
Item Specification
Standard
functions
Maximum frequency 320Hz
Carrier frequency
0.5kHz~16.0kHz
The carrier frequency is automatically adjusted based on the
temperature
Input frequency resolution Digital setting:0.01Hz
Analog setting:maximum frequency×0.025%
Control mode
Voltage/Frequency(V/F) control
Sensorless Vector Control (SVC)
Feedback Vector Control
(
FVC
)
Startup torque G type: 0.5Hz/150% (SVC); 0Hz/180% (FVC)
P type: 0.5Hz/100%
Speed range 1:100(SVC) 1:1000(FVC)
Speed stability accuracy ±0.5%(SVC) ±0.02%(FVC)
Torque control accuracy ±0.5% (FVC)
Overload capacity
G type: 60s for 150% of rated current and 3s for 180% of
rated current
P type: 60s for 120% of rated current and 3s for 150% of
rated current
Torque boost Automatic torque boost
Manual tor
q
ue boost 0.1%~30.0%
V/F curve
Straight-line V/F curve
Multi-point V/F curve
Square V/F curve
Ramp mode
Straight-line ramp
S-curve ramp
Four groups of acceleration/deceleration time with the range
of 0.0–6500.0s
DC braking
DC braking frequency: 0.00Hz to max.frequency
Braking time: 0.0–100.0s
Braking action current value: 0.0%~100.0%
JOG control JOG frequency range: 0.00–50.00 Hz
JOG acceleration/deceleration time: 0.0–6500.0s
Simple PLC, multiply speed
running
The system implements up to 16 speeds by using simple PLC
function or by using digital input signals.
Onboard PID It implements the closed-loop process control system easily.
Auto voltage regulation
(AVR)
The system maintains a constant output voltage
automatically when the grid voltage changes through the
permissible range.
Standard
functions
Overvoltage& Overcurrent
stall control
The current and voltage are limited automatically during the
running process so as to avoid frequent tripping due to
overvoltage and overcurrent.
Rapid current limit It decreases the overcurrent faults to the minimum and
ensures normal running of the AC drive.

JT550 Series Inverter Manual Chapter 2 Mechanical Installation
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Torque limit and control
It can limit the torque automatically and prevent frequent
overcurrent tripping operation.Torque control is applied in
vector control mode.
Individua
- lized
functions
High performance high-performance current vector control technology.
Power dip ride-through
Load feedback energy compensates for any voltage
reduction, allowing the drive to continue to operate for a
short time during power dips.
Timing control Time range: 0.0–6500.0 minutes
Field bus Modbus-RTU protocol (485)
Running
Running command source
• Operation panel control
• Terminal control
• Communication control
Allows different methods of switching between command
sources:
Frequency setting channel
Supports up to 13 frequency reference setting channels and
allows different methods of switching between frequency
reference setting channels:
Digital setting
Analog voltage reference
Analog current reference
Pulse reference
Communication reference
Auxiliary frequency setting
channel
Supports up to 10 auxiliary frequency sources, and
allows fine tuning of the auxiliary frequency and main &
auxiliary calculation.
Input terminals
5 digital input (DI) terminals, X5 supports up to 100 kHz
high-speed pulse input;
2 analog input (AI) terminals, AI1 only supports 0–10 V
voltage input and AI2 supports 0–10 V voltage input or
4–20 mA current input.
Output terminals
1 high-speed pulse output terminal (open-collector) that
supports 0–100 kHz square wave signal output
1 digital output (DO) terminal
2 relay output terminals(One is factory default, the other is
optional)
2 analog output (AO) terminals that supports 0–20 mA
current output or 0–10 V voltage output.
Display &
operate
panel
LED display Display parameters (three display modes: Basic mode,
Quick menu mode, Non-factory value mode).
Protection function
Phase loss protection; Instantaneous overcurrent
protection; overheat protection;Short-circuit protection;
overvoltage protection; undervoltage protection; overload
protection; overcurrent protection;
Optional parts
Braking unit, I/O and AI extension card, field bus
communication card, differential input PG card, OC input
PG card, sin/cos PG card.

Chapter 2 Mechanical Installation JT550 Series Inverter Manual
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Environ-
ment
Installation location Indoor, free from direct sunlight, dust, corrosive gas,
combustible gas, oil smoke, vapour, drip or salt.
Altitude Lower than 1000 m (derated if higher than 1000 m)
Ambient temperature -10°C to +40°C (derated if the ambient temperature is
between 40°C and 50°C).
Humidity Less than 95%RH, without condensing
Vibration Less than 5.9 m/s2 (0.6 g)
Storage temperature －20℃~＋60℃
1.6 Product Appearance and Dimensions
W1
W
H
H1
D1
D
Figure 1.5 Plastic Case Mounting Dimensions
W1
W
H
H1
D1
D
Figure 1.6 Metallic Case Mounting Dimensions

JT550 Series Inverter Manual Chapter 2 Mechanical Installation
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Model
Mounting
Holes Position Dimensions Diameter of
Mounting
Holes
W1 H1 H W D1 D
JT550-S2-0R7GB 71.5 121.5 132 80 105.5 114.6 φ4.5
JT550-S2-1R5GB
JT550-S2-2R2GB
88.4 168.4 180 100 152 159 φ5.5
JT550-T3-0R7G/1R5PB
JT550-T3-1R5G/2R2PB
JT550-T3-2R2G/4R0PB
JT550-T3-4R0G/5R5PB 118.4 224.5 236 130 163.5 170.5 φ5.5
JT550-T3-5R5G/7R5PB
JT550-T3-7R5G/011PB 141 243 260 155 175 182 φ7
JT550-T3-011G/015PB
JT550-T3-015G/018PB
190 273.5 291.5 197 175 182 φ6
JT550-T3-018G/022PB
JT550-T3-022G/030PB
JT550-T3-030G/037P 220 392 405 253 180 187 φ7
JT550-T3-037G/045P
JT550-T3-045G/055P 260 555 575 340 250 259 φ10
JT550-T3-055G/075P
JT550-T3-075G/090P 260 590 610 410 270 279 φ10
JT550-T3-090G/110P
JT550-T3-110G/132P 320 690 720 455 325 334 φ12
JT550-T3-132G/160P
JT550-T3-160G/185P 360 845 880 530 367 376 φ14
JT550-T3-200G/220P
JT550-T3-220G/250P
480 1005 1040 650 411 420 φ14
JT550-T3-250G/280P
JT550-T3-280G/315P
JT550-T3-315G/355P
600 1252 1300 815 427 436 φ14
JT550-T3-355G/400P
JT550-T3-400G/450P
JT550-T3-450G

Chapter 2 Mechanical Installation JT550 Series Inverter Manual
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1.6.2 Cabinet Installation Dimensions
Figure 1.7 Installation Diagram
W1
H1
H
W
LL1
D
Figure 1.8 Cabinet Installation Dimensions
Model Appearance Dimensions (mm) Installation
Dimensions
Diameter of
Mounting
Holes
H W L L1 H1 W1
JT550-T3-045G/055P 249 340 850 810 180 280 φ12
JT550-T3-055G/075P
JT550-T3-075G/090P 265 416 880 840 190 350 φ10
JT550-T3-090G/110P
JT550-T3-110G/132P 327 461 980 935 220 380 φ12
JT550-T3-132G/160P
JT550-T3-160G/185P 367 536 1190 1142 290 460 φ12
JT550-T3-200G/220P
JT550-T3-220G/280P 412 656 1400 1354 300 560 φ12
JT550-T3-280G/315P
JT550-T3-315G/400P
428 815 1757 1702 300 730 φ12JT550-T3-400G/450P
JT550-T3-450G
JT550-T3-500G 600 1150 1900 / 480 1050 φ18
JT550-T3-560G
JT550-T3-630G 600 1310 2208 / 480 1210 φ18
JT550-T3-710G

JT550 Series Inverter Manual Chapter 2 Mechanical Installation
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1.7 Keyboard Appearance and Dimensions
Figure 1.9 Appearance and Dimensions of the Keyboard (mm)
1.8 Appearance and Hole Size of the Keyboard Tray
2-R12
键盘托盘尺寸 托盘开孔尺寸
（也可开方孔 115mm*67mm）
121.2
74.2 15.8
115
67
101.9
R12.5
2-R5
Figure 1.10 Keyboard Tray Appearance and Hole Size (mm)

Chapter 2 Mechanical Installation JT550 Series Inverter Manual
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1.9 Appearance and Dimensions of the Double Display Keyboard and Tray
60 14.3
21.1
32.777.2
5.2 39.1
116
Figure 1.11 Appearance and Dimensions of the Double Display Keyboard
121.9
2-R5
2-R12
R12.5
66
(135)
托盘开孔尺寸
（也可开方孔129.5mm*66mm）
74.2
141.2
15.8
托盘尺寸
Figure 1.12 Appearance and Dimensions of the Double Display Keyboard and Tray
Dimensions of the Tray Hole Sizes of the Tray
(Square Hole 129.5mm*66mm)

JT550 Series Inverter Manual Chapter 2 Mechanical Installation
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Chapter 2 Mechanical Installation
2.1 Installation Environment
1. Ambient Temperature: The temperature affects the life of product. It is prohibited to run the product
out of ambient temperature range (-10℃~50℃).
2. Please install the product on flame retardants and mount it vertically on mounting brackets using blots
or screws. Be sure to allow sufficient space around the inverter for heat dissipation since it generates heat
while running.
3. Please install the inverter on a flat surface where the vibration should remain lower than 0.6g, away
from punches, etc.
4. Avoid installing the inverter under direct sunlight or in humid places.
5. Avoid installing the inverter in places of corrosive, flammable and explosive gas.
6. Avoid installing the inverter in places full of oil, dust and metal particles.
2.2 Installation Space and Directions
2.2.1 Single Inverter Installation: the installation and insulation space for an inverter has to be left out
based on its different power ratings.
2.2.2 Multiple Inverters Installation: Inverters dissipate from bottom to top. Therefore, when multiple
inverters are operating, they are usually installed side by side and aligned to top, especially for different
sizes of inverters.
Power level Size Requirements
0.75kW-22kW A≥10mm B≥100mm C≥40mm
30kW-37kW A≥50mm B≥200mm C≥40mm
45kW-75kW A≥50mm B≥200mm C≥40mm
90kW-710kW A≥50mm B≥200mm C≥40mm
Power level Size Requirements
0.75kW-22kW A≥10mm
30kW-37kW A≥50mm
45kW-75kW A≥50mm
90kW-710kW A≥50mm
Power Ratings
0.75KW-22kW
30KW-37kW
Size Requirements
A≥10mm B≥100mm
A≥50mm B≥200mm
A≥50mm B≥200mm
A≥50mm B≥300mm
45KW-75kW
90KW-710kW
Installation Space Requirements
C≥40mm
C≥40mm
C≥40mm
C≥40mm
0.75kW-22kW
30kW-37kW
A≥10mm
A≥50mm
A≥50mm
A≥50mm
45kW-75kW
90kW-710kW
Hot Air
Cold Air
Installation Space Requirements
Power Ratings Size Requirements
Hot Air
Cold Air

Chapter 2 Mechanical Installation JT550 Series Inverter Manual
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2.2.3 Multiple Inverters Installed Vertically: In occasions where multiple inverters need installed vertically
next to each other, the lower row of inverters’ dissipation of heat will cause a temperature rise of the upper
row of inverters, resulting in the overheat/overload errors of the upper row of inverters. Therefore, it is
recommended to take measures such as installing a insulation plate in between as the following the figure:
Insulation guide plate
Figure 2.1 Inverter Installation Diagram
Note: Please install an insulation plate according to the figure above when installing two inverters
vertically next to each other.
Attention Matters for Heat Dissipation of Mechanically Mounting:
1) The inverter should be installed vertically for heat dissipation but cannot be put upside down.
Installing the inverters side by side is highly recommended for installing a number of them in one
cabinet. Please refer to figure 3-1 when installing the insulation plate
2) Follow Figure3.1 to ensure the dissipation space for the inverters. The heat dissipation of other
machines in the cabinet should be considered as well.
3) The mounting bracket must be flame retardant material.
4) Installing the radiator outside the cabinet is recommended if there are metal dusts at the installation
location. Please make sure the sealed cabinet space is as large as possible.

JT550 Series Inverter Manual Chapter 2 Mechanical Installation
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2.3 Dismantling of the Cover Plate
挂钩
1.左右对称向内侧用力
压挂钩使挂钩松脱
2.将盖板往上旋转
Figure 2.2 Remove the Cover Plate (Plastic Case)
抓紧盖板下端并
往上旋转抽出
1.用螺丝刀卸下4颗
面板上的螺钉
Figure 2.3 Remove the Cover Plate (Metallic Case)
1. Press inward to disconnect the
hook from the hook slot.
2. Lift the cover to open
the inverter.
Hook
1. Loosen the screws.
2. Lift the cover to open the
inverter.

Chapter 3 Electrical Installation JT550 Series Inverter Manual
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Chapter 3 Electrical Installation
3.1 Electrical Installation
R S T U V W
Braking resistor
P(+)
+
-
Braking unit
Ground
Mot
or
AC output reactor
Figure 3.1 Peripheral Electrical Devices
●Do not install capacitors or surge suppressor on the output side of the inverter ,which will lead to a
breakdown or cause damage to the capacitor the surge suppressor.
●Input/Output (Major Loop) of the inverter contains harmonics, which may interfere with the communication
devices connected to the inverter. Therefore, anti-interference filters are recommended to install in order to
minimize the interference.
●Please refer to the selection manual of peripheral equipment for more details of peripheral devices and
options.
Three-phase AC power supply
Moulded Case Circuit Breaker
(MCCB) or earth leakage circuit
breaker
Electromagnetic contactor To guarantee safety, use an electromagnetic contactor.
Do not use it to start or stop the inverter because such
operation reduces the service life of the inverter
Select a proper breaker to resist large in-rush current
that flows into the inverter at power-on
Use within the allowable power supply specification
of the inverter
Ground
Noise filter on input side Reduce the
electromagnetic
interference on
the input side
AC input reactor
Suppress the
high order
harmonic to
improve the
power factor
Motor
Braking resistor
Braking unit
Reliably ground the motor and the
inverter to prevent electric shock AC output
reactor
Ground

JT550 Series Inverter Manual Chapter 3 Electrical Installation
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3.2 Description of Peripheral Electrical Devices
Items Function Descriptions
MCCB Disconnect the power supply when over current occurs on downstream
devices
Residual Current
Circuit Breaker
(RCCB)
Since the output of the inverter is high-frequency pulse voltage,
high-frequency leakage occurs sometimes; When installing an RCCB
on the input side, it is recommended to choose the special-use RCCB.
It is suggested to choose the model “B” for RCCB, and the leakage
current is set to 300mA.
Contactor
Start and stop the inverter.
Avoid starting and stopping the inverter frequently by switching the
contactor on and off (less than twice per minute) nor use it to directly
start the inverter.
EMC
Input Filter
• Reduce the external conduction and radiation interference of the
inverter.
• Decrease the conducting interference flowing from the power
terminals to the inverter and improve the anti-interference capability
of the inverter.
AC Input
Reactor
• Improve the power factor of the input side;
• Eliminate the higher harmonics generation on the input side
effectively and prevent other devices from being damaged due to
distortion of the voltage waveform.
• Eliminate the imbalance among the power phases that causes the
imbalance of input current.
DC
Reactor
• Improve the power factor of the input side.
• Improve the efficiency and thermal stability of the inverter.
• Eliminate the impact of higher harmonics of the inverter input side
and reduce the external radiation and interference.
AC Output
Reactor
The output side of the inverter generally has much higher harmonics.
When the motor is far from the inverter, there is distributed
capacitance in the circuit and certain harmonics may cause resonance
in the circuit, bringing the following two effects:
• Impair the motor insulation performance and damage the motor on
the long run.
• Generate large leakage current and cause frequent protection of
tripping on the inverter. If the distance between the inverter and the
motor is greater than 100 m, an AC output reactor is recommended.
Table 3.1 Description of Peripheral Electrical Devices

Chapter 3 Electrical Installation JT550 Series Inverter Manual
- 20 -
3.3 Peripheral Electrical Components Selection Guidance
Converter model MCCB
(A)
Contactor
(A)
Power Input
Cable
(mm2)
Power Output
Cable
(mm2)
Control Circuit
Wirings (mm2)
JT550-S2-0R4GB 10 9 0.75 0.75 0.5
JT550-S2-0R7GB 16 12 0.75 0.75 0.5
JT550-S2-1R5GB 25 18 1.5 1.5 0.5
JT550-S2-2R2GB 32 25 2.5 2.5 0.5
JT550-T3-0R7G/1R5PB 6 9 0.75 0.75 0.5
JT550-T3-1R5G/2R2PB 10 9 0.75 0.75 0.5
JT550-T3-2R2G/4R0PB 10 9 0.75 0.75 0.5
JT550-T3-4R0G/5R5PB 16 12 1.5 1.5 0.5
JT550-T3-5R5G/7R5PB 20 18 2.5 2.5 0.75
JT550-T3-7R5G/011PB 32 25 4.0 4.0 0.75
JT550-T3-011G/015PB 40 32 4.0 4.0 0.75
JT550-T3-015G/018PB 50 38 6.0 6.0 0.75
JT550-T3-018G/022PB 50 40 10 10 1.0
JT550-T3-022G/030PB 63 50 10 10 1.0
JT550-T3-030G/037P 100 65 16 16 1.0
JT550-T3-037G/045P 100 80 25 25 1.0
JT550-T3-045G/055P 125 95 35 35 1.0
JT550-T3-055G/075P 160 115 50 50 1.0
JT550-T3-075G/090P 225 170 70 70 1.0
JT550-T3-090G/110P 250 205 95 95 1.0
JT550-T3-110G/132P 315 245 120 120 1.0
JT550-T3-132G/160P 350 300 120 120 1.0
JT550-T3-160G/185P 400 300 150 150 1.0
JT550-T3-200G/220P 500 410 185 185 1.0
JT550-T3-220G/250P 630 475 2*120 2*120 1.0
JT550-T3-250G/280P 630 475 2*120 2*120 1.0
JT550-T3-280G/315P 700 620 2*120 2*120 1.0
JT550-T3-315G /355P 800 620 2*150 2*150 1.0
JT550-T3-355G /400P 1000 800 2*185 2*185 1.0
JT550-T3-400G /450P 1250 800 2*240 2*240 1.0
JT550-T3-450G 1250 1000 2*240 2*240 1.0
JT550-T3-500G 1600 1000 2*300 2*300 1.0
JT550-T3-560G 1600 1250 2*300 2*300 1.0
JT550-T3-630G 2000 1600 2*300 2*300 1.0
JT550-T3-710G 2500 2000 2*300 2*300 1.0
3.4 Selection of Braking Unit and Braking Resistor
Value selection of the Braking Resistor
The AC drive transfers regenerative energy generated during braking of motor to external
braking resistor.
According to the formula U* U/R = Pb:
• U: the braking voltage at system stable braking.
• U: value varies with the system. The 380 VAC power system usually selects 700 V braking
• Pb: braking power.
Power selection of the Braking Resistor
In theory, power of braking resistor is the same as braking power. But in consideration of derating, power of
braking resistor is calculated from the following formula:according to the formula :0.7 * Pr = Pb* D.