Inovance CP700 Series User manual

User Guide
CP700 Series AC Drive
For Air Compressors
CP700 Series AC Drive for Air Compressors User Guide
Copyright Shenzhen Inovance Technology Co., Ltd.
Shenzhen Inovance Technology Co., Ltd.
Add.: Building E, Hongwei Industry Park, Liuxian Road, Baocheng No. 70 Zone, Bao’an District, Shenzhen
Tel: [phone]
Fax: [phone]
Service Hotline: [phone]
http: //www.inovance.com
Suzhou Inovance Technology Co., Ltd.
Add.: No. 16 Youxiang Road, Yuexi Town, Wuzhong District, Suzhou 215104, P.R. China
Tel: [phone]
Fax: [phone]
Service Hotline: [phone]
http: //www.inovance.com
A02
Data code 19010796
User Guide

Preface
- 1 -
Preface
Thank you for purchasing the CP700 series AC drive for air compressors developed and
manufactured by Inovance.
The CP700 series AC drive for air compressors has the following features:
■Easy mounting: The sheet metal structure is adopted with wall-mounting
supported.
■Simpli󶍾ed wiring and commissioning: The control circuit terminal uses plug-in
connector terminals with error proo󶍾ng design.
■High integration: The AC drive is equipped with built-in 220 VAC power supply
for 24 V output, a mains frequency contactor, and built-in detection and
protection circuits such as PT100 and PTC. The AC drive uses dedicated software
to communicate with HMI and Internet of Things (IoT) equipment without
commissioning, which supports one-button startup.
This user guide describes the correct use of the CP700 series AC drive for air
compressors, including selection, mounting, wiring, and commissioning. Read and
understand the user guide before use and forward the user guide to end users.
About the User Guide
Read and understand the user guide before use. Contact our technical support
personnel if you have any question during the use.
Standards Compliance
The following table lists the certi󶍾cations and standards that the product may comply
with. For details about the acquired certi󶍾cations, see the certi󶍾cation marks on the
product nameplate.
Name Directive Name Standard
CE certi󶍾cation
EMC Directive 2014/30/EU EN 61800-3
LVD Directive 2014/35/EU EN 61800-5-1
RoHS Directive 2011/65/EU EN 50581
TUV certi󶍾cation - EN 61800-5-1
UL certi󶍾cation UL508C/UL61800-5-1
C22.2 No.14-13

Revision History
- 2 -
Revision History
Date Version Revision Description
November 2018 A00 First release.
April 2019 A01
◆Updated Inovance's logo.
◆Updated the certi󶍾cation description in Preface.
July 2019 A02
◆Added data of the 90 kW models in the following
sections:
1.1 Nameplate and Model Number
1.3 Technical Data
1.4 Overall Dimensions
2.4.1 Main Power Cables
5.3.2 Number of Cooling Fans
◆Updated data of F9-17 to F9-45 in "A.1 Standard
Parameter Table".
◆Added group A4 parameters and A8-80 to A8-86 in
"A.1 Standard Parameter Table".
◆Added U0-76 and U0-87 to U0-95 in "A.2
Monitoring Parameters".
◆Modi󶍾ed data of U0-77.
Acquisition
This user guide is shipped with the product. You can contact your sales representative
for any additional order.
To obtain the electronic version of the user guide, log in to Inovance's website
(http://www.inovance.com), click "Download", search the user guide name, and then
download the PDF.

Revision History
- 3 -
Contents
Preface ........................................................................................................................................ 1
Revision History ......................................................................................................................... 2
Safety Instructions ..................................................................................................................... 5
Safety Precautions............................................................................................................... 5
Safety Levels and De󶍾nitions ............................................................................................. 5
Safety Instructions............................................................................................................... 5
Safety Signs........................................................................................................................ 10
1 Product Information............................................................................................................ 11
1.1 Nameplate and Model Number.................................................................................. 11
1.2 Components ................................................................................................................ 12
1.3 Technical Data.............................................................................................................. 13
1.4 Overall Dimensions...................................................................................................... 16
1.5 Recommended System Solution................................................................................ 18
1.5.1 CP700 System Structure ...................................................................................... 18
1.5.2 Peripheral Electrical Devices............................................................................... 19
2 Installation and Wiring........................................................................................................ 21
2.1 Installation ................................................................................................................... 21
2.1.1 Installation Environment ..................................................................................... 21
2.1.2 Installation Clearance Requirements.................................................................. 22
2.1.3 Cover Removal and Mounting.............................................................................. 22
2.2 Wiring........................................................................................................................... 24
2.2.1 Main Circuit Terminal Arrangement..................................................................... 24
2.2.2 Control Terminal Arrangement............................................................................ 26
2.2.3 Control Terminal Wiring....................................................................................... 29
2.3 Power Grid System Requirement ............................................................................... 30
2.4 Wiring Recommendations........................................................................................... 30
2.4.1 Main Power Cables ............................................................................................... 30
2.4.2 Control Cables...................................................................................................... 32
3 Display Description and Commissioning........................................................................... 33
3.1 Indicator Description................................................................................................... 33
3.2 Commissioning Process.............................................................................................. 34
3.3 System Commissioning Case Study........................................................................... 35
4 Troubleshooting.................................................................................................................... 39

Revision History
- 4 -
4.1 Fault Codes and Solutions.......................................................................................... 39
4.2 Symptoms and Solutions............................................................................................ 50
5 Maintenance .......................................................................................................................... 52
5.1 Daily Maintenance ....................................................................................................... 52
5.2 Periodic Inspection...................................................................................................... 53
5.3 Replacement of Wear Parts......................................................................................... 53
5.3.1 Lifetime of Wear Parts.......................................................................................... 53
5.3.2 Number of Cooling Fans....................................................................................... 54
5.3 Replacing Cooling Fans........................................................................................... 54
5.4 Storage ......................................................................................................................... 57
Appendix A Parameter Table................................................................................................... 58
A.1 Standard Parameter Table.......................................................................................... 58
A.2 Monitoring Parameters ............................................................................................. 109
Warranty Agreement.............................................................................................................. 112

Safety Instructions
- 5 -
Safety Instructions
Safety Precautions
1) Before installing, using, and maintaining this equipment, read the safety
information and precautions thoroughly, and comply with them during operations.
2) To ensure the safety of humans and equipment, follow the signs on the equipment
and all the safety instructions in this user guide.
3) "CAUTION", "WARNING", and "DANGER" items in the user guide do not indicate
all safety precautions that need to be followed; instead, they just supplement the
safety precautions.
4) Use this equipment according to the designated environment requirements.
Damage caused by improper usage is not covered by warranty.
5) Inovance shall take no responsibility for any personal injuries or property damage
caused by improper usage.
Safety Levels and De󶍾nitions
DANGER
indicates that failure to comply with the notice will result in severe
personal injuries or even death.
WARNING
indicates that failure to comply with the notice may result in severe
personal injuries or even death.
CAUTION
indicates that failure to comply with the notice may result in minor
personal injuries or damage to the equipment.
Safety Instructions
Unpacking
CAUTION
◆Check whether the packing is intact and whether there is damage, water seepage, damp,
and deformation.
◆Unpack the package by following the package sequence. Do not hit the package with
force.
◆Check whether there are damage, rust, or injuries on the surface of the equipment or
equipment accessories.
◆Check whether the number of packing materials is consistent with the packing list.

Safety Instructions
- 6 -
WARNING
◆Do not install the equipment if you 󶍾nd damage, rust, or indications of use on the
equipment or accessories.
◆Do not install the equipment if you 󶍾nd water seepage, component missing or damage
upon unpacking.
◆Do not install the equipment if you 󶍾nd the packing list does not conform to the equip-
ment you received.
Storage and Transportation
CAUTION
◆Store and transport this equipment based on the storage and transportation
requirements for humidity and temperature.
◆Avoid transporting the equipment in environments such as water splashing, rain, direct
sunlight, strong electric 󶍾eld, strong magnetic 󶍾eld, and strong vibration.
◆Avoid storing this equipment for more than three months. Long-term storage requires
stricter protection and necessary inspections.
◆Pack the equipment strictly before transportation. Use a sealed box for long-distance
transportation.
◆Never transport this equipment with other equipment or materials that may harm or
have negative impacts on this equipment.
WARNING
◆Use professional loading and unloading equipment to carry large-scale or heavy
equipment.
◆When carrying this equipment with bare hands, hold the equipment casing 󶍾rmly with
care to prevent parts falling. Failure to comply may result in personal injuries.
◆Handle the equipment with care during transportation and mind your step to prevent
personal injuries or equipment damage.
◆Never stand or stay below the equipment when the equipment is lifted by hoisting
equipment.
Installation
WARNING
◆Thoroughly read the safety instructions and user guide before installation.
◆Do not modify this equipment.
◆Do not rotate the equipment components or loosen 󶍾xed bolts (especially those marked
in red) on equipment components.
◆Do not install this equipment in places with strong electric or magnetic 󶍾elds.
◆When this equipment is installed in a cabinet or 󶍾nal equipment, protection measures
such as a 󶍾reproof enclosure, electrical enclosure, or mechanical enclosure must be
provided. The IP rating must meet IEC standards and local laws and regulations.

Safety Instructions
- 7 -
DANGER
◆Equipment installation, wiring, maintenance, inspection, or parts replacement must be
performed by only professionals.
◆Installation, wiring, maintenance, inspection, or parts replacement must be performed
by only experienced personnel who have been trained with necessary electrical
information.
◆Installation personnel must be familiar with equipment installation requirements and
relevant technical materials.
◆Before installing equipment with strong electromagnetic interference, such as a
transformer, install an electromagnetic shielding device for this equipment to prevent
malfunctions.
Wiring
DANGER
◆Equipment installation, wiring, maintenance, inspection, or parts replacement must be
performed by only professionals.
◆Never perform wiring at power-on. Failure to comply will result in an electric shock.
◆Before wiring, cut o󶍽 all equipment power supplies. Wait at least 10 minutes before
further operations because residual voltage exists after power-o󶍽.
◆Make sure that the equipment is well grounded. Failure to comply will result in an
electric shock.
◆During wiring, follow the proper electrostatic discharge (ESD) procedures, and wear
an antistatic wrist strap. Failure to comply will result in damage to internal equipment
circuits.
WARNING
◆Never connect the power cable to output terminals of the equipment. Failure to comply
may cause equipment damage or even a 󶍾re.
◆When connecting a drive with the motor, make sure that the phase sequences of the
drive and motor terminals are consistent to prevent reverse motor rotation.
◆Wiring cables must meet diameter and shielding requirements. The shielding layer of the
shielded cable must be reliably grounded at one end.
◆After wiring, make sure that no screws are fallen and cables are exposed in the
equipment.

Safety Instructions
- 8 -
Power-on
DANGER
◆Before power-on, make sure that the equipment is installed properly with reliable wiring
and the motor can be restarted.
◆Before power-on, make sure that the power supply meets equipment requirements to
prevent equipment damage or even a 󶍾re.
◆At power-on, unexpected operations may be triggered on the equipment. Therefore, stay
away from the equipment.
◆After power-on, do not open the cabinet door and protective cover of the equipment.
Failure to comply will result in an electric shock.
◆Do not touch any wiring terminals at power-on. Failure to comply will result in an electric
shock.
◆Do not remove any part of the equipment at power-on. Failure to comply will result in an
electric shock.
Operation
DANGER
◆Do not touch any wiring terminals during operation. Failure to comply will result in an
electric shock.
◆Do not remove any part of the equipment during operation. Failure to comply will result
in an electric shock.
◆Do not touch the equipment shell, fan, or resistor for temperature detection. Failure to
comply will result in heat injuries.
◆Signal detection must be performed by only professionals during operation. Failure to
comply will result in personal injuries or equipment damage.
WARNING
◆Prevent metal or other objects from falling into the device during operation. Failure to
comply may result in equipment damage.
◆Do not start or stop the equipment using the contactor. Failure to comply may result in
equipment damage.
Maintenance
DANGER
◆Equipment installation, wiring, maintenance, inspection, or parts replacement must be
performed by only professionals.
◆Do not maintain the equipment at power-on. Failure to comply will result in an electric
shock.
◆Before maintenance, cut o󶍽 all equipment power supplies and wait at least 10 minutes.

Safety Instructions
- 9 -
WARNING
◆Perform daily and periodic inspection and maintenance for the equipment according to
maintenance requirements and keep a maintenance record.
Repair
DANGER
◆Equipment installation, wiring, maintenance, inspection, or parts replacement must be
performed by only professionals.
◆Do not repair the equipment at power-on. Failure to comply will result in an electric
shock.
◆Before inspection and repair, cut o󶍽 all equipment power supplies and wait at least 10
minutes.
WARNING
◆Require repair services according to the product warranty agreement.
◆When the equipment is faulty or damaged, require professionals to perform
troubleshooting and repair by following repair instructions and keep a repair record.
◆Replace quick-wear parts of the equipment according to the replacement guide.
◆Do not operate damaged equipment. Failure to comply may result in worse damage.
◆After the equipment is replaced, perform wiring inspection and parameter settings again.
Disposal
WARNING
◆Retire equipment by following local regulations or standards. Failure to comply may
result in property damage, personal injuries, or even death.
◆Dispose of or recycle retired equipment by following industry waste disposal standards
to avoid environmental pollution.

Safety Instructions
- 10 -
Safety Signs
■Description of safety signs in the user guide
i
Read the user guide before installation and operation.
Reliably ground the system and equipment.
Danger!
High temperature!
Prevent personal injuries caused by machines.
High voltage!
**min
Wait xx minutes before further operations.
■Description of safety signs on the equipment
For safe equipment operation and maintenance, comply with safety signs on the
equipment, and do not damage or remove the safety labels. The following table
describes the safety signs.
Safety Sign Description
◆Read the user guide before installation and operation.
Failure to comply will result in an electric shock.
◆Do not remove the cover at power-on or within 10 minutes
after power-o󶍽.
◆Before maintenance, inspection, and wiring, cut o󶍽 input
and output power, and wait at least 10 minutes until the
power indicator is o󶍽.

1 Product Information
- 11 -
1 Product Information
1.1 Nameplate and Model Number
MODEL: CP700-4T22-H
INPUT: 3PH AC 380-440 57.5A 50Hz/60Hz
OUTPUT: 3PH AC 0-440V 45.0A 0-500Hz 22kW
S/N: XXXXXXXXXXXXXXXX
Suzhou Inovance Technology Co., Ltd.
Product model
Rated input
Rated output
Manufacturing
number
Nameplate
Certification mark
CP700 - 4T 22 - H
ID Product Series
CP700 AC drive for air compressors
ID Voltage Class
4T Three phase 380–440 V
ID Mounting Mode
ID Motor (kW)
5.5 5.5
…
90 90
Backplate mountingH
2T Three phase 200–240 V
Figure 1-1 Nameplate and model number

1 Product Information
- 12 -
1.2 Components
9
10
15
14
13
12
11
1
2
4
5
6
7
8
3
Figure 1-2 Component diagram (CP700-4T18.5-H to CP700-4T22-H)
No. Component Name No. Component Name
1 LED indicator panel 9 Nameplate
2 STO card (optional) 10 Control circuit port
3Logo 11 Wire bracket
4 Indicator 12 Variable frequency cooling blower
terminal
5 Front cover 13 Air end output terminal
6EMC screw/voltage dependent
resistor (VDR) grounding terminal 14 Grounding terminal
7Mains frequency cooling blower
terminal 15 Protective ring
8 Input terminal
NOTE
Figure 1-2 shows components of CP700-4T18.5-H to CP700-4T22-H as an
example. Other model description varies with actual components.

1 Product Information
- 13 -
1.3 Technical Data
Table 1-1 CP700 series AC drive models and technical data
Model
Main Cooling Blower Variable Frequency
Cooling Blower
Mains Frequency
Cooling Blower
Power
(kW)
Input
Current (A)
Output
Current (A)
Power
(kW)
Rated
Current (A)
Power
(kW)
Rated
Current (A)
Three phase 200 VAC to 240 VAC, 50/60 Hz
CP700-2T7.5-H 7.5 35.0 32.0 / / 0.25 1.5
CP700-2T11-H 11 49.5 45.0 0.45 2.1 0.45 2.1
CP700-2T15-H 15 60.0 55.0 0.45 2.1 0.45 2.1
CP700-2T18.5-H 18.5 65.0 60.0 0.75 3.8 0.45 2.1
CP700-2T22-H 22 80 75 0.75 3.8 0.45 2.1
CP700-2T30-H 30 120.9 112 2.2 9.0 0.45 2.1
CP700-2T37-H 37 134.0 125.0 2.2 9.0 0.45 2.1
CP700-2T45-H 45 159.2 150.0 2.2 9.0 0.45 2.1
Three phase 380 VAC to 440 VAC, 50/60 Hz
CP700-4T5.5-H 5.5 15.9 13 / / 0.4 1.5
CP700-4T7.5-H 7.5 20.5 17 / / 0.4 1.5
CP700-4T11-H 11 26 25 / / 0.4 1.5
CP700-4T15-H 15 35 32 / / 0.4 1.5
CP700-4T18.5-H 18.5 47.2 37.0 0.75 2.1 0.75 2.1
CP700-4T22-H 22 57.5 45.0 0.75 2.1 0.75 2.1
CP700-4T30-H 30 65.0 60.0 1.5 3.8 0.75 2.1
CP700-4T37-H 37 80.0 75.0 1.5 3.8 0.75 2.1
CP700-4T45-H 45 101.4 91.0 3.7 9.0 0.75 2.1
CP700-4T55-H 55 122.3 112.0 3.7 9.0 0.75 2.1
CP700-4T75-H 75 164.6 150.0 3.7 9.0 0.75 2.1
CP700-4T90-H 90 186.0 176.0 3.7 9.0 0.75 2.1

1 Product Information
- 14 -
Table 1-2 CP700 series technical data
Item Speci󶍾cation
Basic
parameters
Output frequency Vector control: 0–500 Hz
Carrier frequency 2–8 kHz: The carrier frequency is adjusted
automatically according to heatsink temperature.
Input frequency
resolution Digital setting: 0.01 Hz
AC drive capacity Three phase 220 V: 7.5–45 kW
Three phase 380 V: 5.5–75 kW
Input voltage Three phase 220 V: 220–240 VAC
Three phase 380 V: 380–440 VAC
Voltage 󶍿uctuation
range –15% to +10%
Control mode Speed sensorless vector control (SVC)
Speed range 1:50 (SVC, power driven)
Speed control accuracy ±0.1% (SVC)
Speed 󶍿uctuation 1.5% (SVC); 3.0% (󶍿ux weakening region)
Torque response < 15 ms (SVC)
Torque 󶍿uctuation < 15% (SVC, power generation); < 12% (motoring)
Torque control mode SVC
Overload capacity
The air end overload current multiple and overload
time are automatically calculated based on module
temperature.
Customized
features
Acceleration/
Deceleration curve Straight line, S curve mode 1, and S curve mode 2
Built-in PID Built-in specialized pressure and temperature PID
parameters for pressure and temperature control
Communication/Bus Standard RS485
Running command
channel
Two channels: terminal and communication
command setting
Frequency source Digital setting

1 Product Information
- 15 -
Item Speci󶍾cation
HMI
Analog input
Two for the pressure sensor: 0–20 mA input, 12-bit
resolution, and correction accuracy of 0.5%
Two for the temperature sensor: resistance input,
12-bit resolution, and correction accuracy of 0.5%
Digital input
Four common inputs: NPN input method
Two PTC protective circuits (compatible with
common inputs)
Digital output Two normally open (NO) relay outputs
LED indicator Three LED indicators (standard con󶍾guration)
Protection
function
Short-circuit to ground upon power-on, motor overheat (PTC), AC drive
overcurrent, AC drive overload, motor overload, AC drive overvoltage, AC
drive undervoltage, AC drive overheat, output phase loss, input phase loss,
communication fault, phase detection fault, current detection fault, motor
auto-tuning fault, EEPROM read-write fault, and bu󶍽er resistance fault
Air
compressor
control logic
Constant pressure value, unloading pressure, sleep wake-up pressure,
shutdown preparation time, shutdown block time, constant temperature
value, fan startup temperature, fan stop temperature, pre-operation
frequency, pre-operation time, PID pressure adjustment, PID temperature
adjustment, and solenoid valve control
Environment
Operating location Free from direct sunlight, dust, corrosive gas,
combustible gas, oil mist, vapor, drip, or salt indoor
Altitude Max. 3000 m; de-rated by 1% per 100 m when the
altitude is above 1000 m
Operating temperature –10℃ to +50℃
Humidity Less than 95% RH without condensing
Vibration Less than 9.8 m/s2(1G)
Storage temperature –20℃ to +60℃

1 Product Information
- 16 -
1.4 Overall Dimensions
The CP700 series AC drive for air compressors can be mounted on the wall. The speci󶍾c
mounting dimensions are as follows.
H1H
A
W
B
d1 D
Figure 1-3 Wall-mounting dimensions

1 Product Information
- 17 -
Table 1-3 Physical dimensions and mounting hole diameters of wall-mounted models
AC Drive Model Physical Dimensions (mm) Mounting Dimensions
(mm) Weight
(kg)
H1 H W D A B d1
Three phase 200 VAC to 240 VAC, 50/60 Hz
CP700-2T7.5-H 384 357 208 176 180 371 φ6 9.5
CP700-2T11-H 393 365 284 190 222 378 φ7 14.5
CP700-2T15-H 393 365 284 190 222 378 φ7 14.5
CP700-2T18.5-H 423 395 315 215 253 408 φ7 24.3
CP700-2T22-H 423 395 315 215 253 408 φ7 24.3
CP700-2T30-H 501 485 366 258 294 478 φ10 33.8
CP700-2T37-H 501 485 366 258 294 478 φ10 33.8
CP700-2T45-H 525 509 400 260 328 502 φ10 42.0
Three phase 380 VAC to 440 VAC, 50/60 Hz
CP700-4T5.5-H 344 317 168 176 140 331 φ6 7.0
CP700-4T7.5-H 344 317 168 176 140 331 φ6 7.0
CP700-4T11-H 384 357 208 176 180 371 φ6 9.5
CP700-4T15-H 384 357 208 176 180 371 φ6 9.5
CP700-4T18.5-H 393 365 284 190 222 378 φ7 14.5
CP700-4T22-H 393 365 284 190 222 378 φ7 14.5
CP700-4T30-H 423 395 315 215 253 408 φ7 24.3
CP700-4T37-H 423 395 315 215 253 408 φ7 24.3
CP700-4T45-H 501 485 366 258 294 478 φ10 33.8
CP700-4T55-H 501 485 366 258 294 478 φ10 33.8
CP700-4T75-H 525 509 400 260 328 502 φ10 42.0
CP700-4T90-H 525 509 400 260 328 502 φ10 42.0

1 Product Information
- 18 -
1.5 Recommended System Solution
1.5.1 CP700 System Structure
Electromagnetic
contactor
Circuit breaker
Three-phase AC
power
Input reactor
EMC filter
S T W2
V2U2
Ground
V1
U1 W1
To prevent electric shock, the
motor and AC drive must be
well grounded.
Air compressor air end
Output reactor
Fuse
Cooling
blower 1
Ground
Single plug cable Power and
communication
port
Emergency
stop button
220 VAC solenoid valve
Pressure sensor
PT100
CP700 series AC drive
HMI
IT6070T
R
Ground
Ground
U3 V3 W3
Cooling
blower 2
Figure 1-4 CP700 system structure

1 Product Information
- 19 -
1.5.2 Peripheral Electrical Devices
Table 1-4 Description of peripheral electrical devices of the CP700 AC system
Part Name Mounting Location Function Description
Circuit breaker
Between power
supply and AC drive
input side
Short circuit breaker: cuts o󶍽 power supply when
overcurrent occurs on downstream devices, so as to
prevent accidents.
Leakage breaker: provides protection against
potential high-frequency leakage current during AC
drive running to prevent electric shock and even a
󶍾re. Choose proper leakage breaker according to the
󶍾eld situation.
Fuse
Between power
supply and AC drive
input side
Provides protection in case of short circuit and
protect downstream semiconductor components.
(Electromagnetism)
Contactor
Between the breaker
and AC drive input
side
Used for applying or cutting o󶍽 power supply of the
AC drive. Do not start and stop the AC drive frequently
by switching the contactor on and o󶍽 (at least 1-hour
interval) nor use it to directly start the AC drive.
Input reactor AC drive input side
Used for improving the power factor of power input
side.
Eliminates higher harmonics of the input side
e󶍽ectively and prevents other devices from being
damaged due to distortion of voltage waveform.
Eliminates input current unbalance caused by inter-
phase unbalance.
EMC 󶍾lter AC drive input side
Reduces external conduction and radiation
interference of the AC drive.
Decreases conduction interference 󶍿owing from
power supply to the AC drive and improves the anti-
interference capacity of the AC drive.
Output reactor
Between the AC drive
output side and
motor (close to the
AC drive)
The output side of an AC drive usually has much
higher harmonics. When a motor is far away from the
AC drive, much distributed capacitance exists in the
circuit. Certain harmonics may cause resonance in
the circuit, which will:
1) Degrade motor insulation performance and
damage motor in the long run.
2) Generate large leakage current and cause frequent
AC drive protection trips.
If the distance between an AC drive and a motor is
greater than 100 m, it is recommended that an AC
output reactor be installed.
dv/dt reactor AC drive output side
(close to the AC drive)
The optional dv/dt drive ensures motor insulation
and reduces bearing current.
Output magnetic
loop
AC drive output side
(close to the AC drive) Reduces bearing current.