Lafaelt AcFee APF User manual

ACFEE ACTIVE POWER FILTER
AcFee APF（V3.0）
Operation manual

AcFee 有源电力滤波器
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Safety Instructions
These safety instructions apply to all active power filter device of
our company.
Ignoring these instructions could result in personal injury and death.
Specific Purpose
Active power filter (APF for short, the same below) is a new
generation of power quality control device, which is mainly used for
harmonic control.
Please pay attention to whether there is reactive power
compensation device composed of passive components such as
capacitors and reactors in the same system. If the settings are
improper, APF may conflict with these passive compensation
device, or the compensation ability cannot be fully exerted.
Operator Qualification
Only qualified personnel engaged in electrical work are allowed to
operate this device.
The installation, operation monitoring and fault repair of APF can
only be operated by professionals, and the personnel who operate
Live Operation Forbidden!

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the device must be familiar with this manual.
Exemption from Liability
The content of the user manual describes the characteristics of the
product, but is usually not a guarantee.
If you encounter any questions and problems, please contact us in
time to avoid irreparable accidents!

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Catalogue
Safety Instruction ...............................................错误!未定义书签。
About This Manual .............................................错误!未定义书签。
Brief Instruction..................................................错误!未定义书签。
Model Description.....................................错误!未定义书签。
AcFee Series APF Features ................................................5
Technical Specifications............................错误!未定义书签。
Working Principle......................................错误!未定义书签。
Dynamic and Steady-State Features of APF......................12
Initial Inspection and Installation..................................................13
Initial Inspection.................................................................15
Location Selection .............................................................15
Device Handling................................................................17
Installation Environment ...........................错误!未定义书签。
Touch Screen Dimension..........................错误!未定义书签。
APF Dimension..................................................................20
Optional Accessories Installation.......................................22
External Incoming Cable Specification......错误!未定义书签。
User Operation Guideline...................................错误!未定义书签。
Main Menu ...............................................错误!未定义书签。
Real-time Date ..................................................................28
Model Information.....................................错误!未定义书签。
User Setting.......................................................................31
Communication Setting ............................错误!未定义书签。
Carbinet Setting........................................错误!未定义书签。
System Setting..................................................................34
Operation Control.....................................错误!未定义书签。
Current Records.......................................错误!未定义书签。
History Records........................................错误!未定义书签。
List of Common Faults ................................................................39
APF Communicaiton Data Point Table................错误!未定义书签。
After-Sales Service.............................................错误!未定义书签。

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About This Manual
Before installing and operating the SVG, this manual should be
read carefully. This manual contains the necessary information for
the perfect performance of the device and to avoid incorrect
operation.
The following symbols, terms and names are used in this manual.
Table1 Use of symbols, terms and names
Note
ATTENTION！
Follow the instructions in the manual to
prevent device damage
Follow the instructions in the manual to
prevent device damage and personal
injury
Warning
Follow the instructions in the manual to
prevent serious accidents
Danger
Follow the instructions in the manual to
prevent serious accidents and fatal
injury
Danger
Follow the instructions in the manual to
prevent serious accidents and fatal
injury caused by dangerous voltage
【Note】
Please pay attention to the content in
[Note] for explanation

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Instruction
Our company wholeheartedly solves power quality problems for
users. APF has unprecedented comprehensive power quality
management capabilities. APF can filter out harmonic numbers
ranging from 2nd to 51st orders at the same time, the filtering ability
can reach more than 97%, the power factor of reactive power
compensation can reach more than 95%, and the complete
compensation time for step-change harmonics is less than 10ms.
Multiple APFs can run in parallel at the same time, and the
efficiency of the whole machine is greater than 97.5%. It is
completely suitable for various situations in the industrial and civil
fields, and is the best solution for nonlinear load harmonic control
and reactive power compensation.
Model Description
LAF 400 -100 -3
Wiring 3: Three-Phase Three Wire
4: Three-Phase Four Wire
Current（A）25-500
Voltage（V）200、400、690
Product Name：Lafaelt Active Power Filter
AcFee Series Features
1. Modular design, the failure of any module will not affect the
normal operation of other modules, which greatly improve
the reliability of the whole machine.

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2. It can simultaneously filter out the harmonic current below
the 2nd to 51st orders, or select order compensation.
Reactive power compensation can make the power factor
reach 1. It can correct unbalanced three-phase current to
complete balance. Reactive power can be compensated and
harmonics be controlled at the same time.
3. Dual-core DSP is used for algorithm processing, the
calculation rate is much higher than that of single-core DSP
control mode, the response speed is faster, and the
anti-interference ability is extremely strong. Using sliding
window iterative DFT detection algorithm, the calculation
speed is fast, the instantaneous response time is less than
0.1ms, and the device compensation response time is less
than 10ms.
4. Provide more than 20 kinds of protection functions, for
example: different levels of overvoltage and overcurrent will
trigger different levels of software/hardware protection; over
temperature and overcurrent can trigger load shedding
protection.
5. Onsite CT wiring location can choose load side or grid side
for sampling. CT direction is optional, just make sure that the
three phases are in the same direction.
6. It can be paralleled with any LC passive device onsite
without resonance.
7. A reliable current limiting control link is adopted, when the
current to be compensated is larger than the rated capacity
of the APF, the device can limit the current at 100% of the

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output automatically, maintain normal operation, and will not
happen faults such as overload or burned；
8. The main circuit adopts tri-level three leg, with high output
waveform quality and low switching loss.
9. It adopts a 7-inch high definition touch screen, which is easy
to operate. The screen displays operating parameters of the
system and device in real time, with faults alarm and recall
function. At the same time, you can use the dual serial port
function of the touch screen to upload data to the 4G cloud
platform or a computer that supports RS485 for remote
monitoring.
10.The APF input terminal is designed according to the second
level lighting protection, and is equipped with reliable surge
protectors, which play a protective role in lighting strikes to
avoid device damaging.
11.With layered design, dust will not adhere to the circuit board,
which is suitable for use under harsh working conditions.

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Technical Specifications
Table 2 Technical Specifications
APF
Specifications
Module
Specification
50A
75A
100A
150A
Input
Working Voltage
200V/400V/690V（±15%）
Working
Frequency
50Hz（-10% ~ +10%）
Current
Transformer
100:5 ~ 10000:5
Function
Harmonics
Compensation
2nd-51st
Harmonics
Rejection Rate
>97%
Compensation
for Reactive
-1~+1 adjustable
Protocol
Communication
Method
RS232, 485, Modbus Protocol, CAN,
TCP/IP Optional
Communication
Interface
RS485, CAN, Net Port
PC Software
Yes, all the parameters can be set through
PC computer
Fault Alarm
See the list of common faults at the end of
the page
Monitor
Support independent monitoring of each
model/centralized monitoring of the whole
machine
Technical
Indicators
Full Response
Time
<10ms
Active Loss
<2.5%
Cooling Method
Smart Air Cooling
Noise
<65dB
Sample/Control
Frequency
15~20kHz
Equivalent
Switching
Frequency
15~20kHz
Protection
More than 20 kinds of protection such as
over-voltage, under-voltage, over-heat,
over-current, short-circuit

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CT Install
Location
Load side/Grid side Optional
Mechanical
Properties
Single Machine
Size
See APF dimension drawing for details
（P13-15）
Weight
25kg~40kg
Environment
Requirements
Working
Temperature
-10℃~+45℃
Altitude
<5000 meters (Above 1500 meters, the
capacity will reduce 1% for every
additional 100 meters）
Relative
Humidity
<90%(25℃)
Protection Class
IP20 (Higher protection class can be
customized)

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Working Principle
Picture1 APF Working Principle Chart
1. Working Principle
User can set parameters so that the device can simultaneously
have the function of filtering harmonics, dynamic reactive power
compensation, and three-phase unbalance compensation.
The principle of filtering harmonic is that APF collects the
current signal in real time through current transformer,
separates the harmonic part through the internal detection
circuit, and generates equal to but opposite phase
compensation current through IGBT power converter, to realize
the function of filtering harmonic function.
The APF output compensation current changes dynamically
and accurately according to harmonic content of the system, so
there will be no over-compensation problem. In addition, there
is internal overload protection function, when the harmonic
content is larger than the APF capacity, the device can

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automatically limit the output to 100% of the rated capacity, no
overload will happen.
The principle of three-phase unbalance compensation is that
APF collects system current signals in real time through
external current transformers and sends them to DSP for
real-time calculation to judge where the system current is in an
unbalanced state, and at the same time calculates the current
difference of each phase when it reaches a balanced state.
According to the current difference, closed loop and dynamically
output PWM signal to control and drive IGBT to invert current of
each phase, and control its natural transfer between the three
phase, to make the current of system to reach a balanced state.
2. Principle of APF Internal Control
Picture2 APF internal control Schematic
As shown in Picture2, after the circuit breaker is closed, in order
to prevent instantaneous impact from grid to DC bus capacitor
when the power is turned on, APF first charges to DC busbar

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capacitor through the soft start circuit, and the process lasts for
more than ten seconds. DC capacitor acts as an energy storage
device, and supplies energy by outputting compensation current
through IGBT and internal reactor. DC capacitor acts as an
energy storage device, and supplies energy by outputting
compensation current through IGBT and internal reactor. APF
collects current signal in real time through external CT and
sends it to signal conditioning circuit, then sends it to controller.
The controller separates the fundamental wave components,
extracts all harmonic current, reactive power current, and
three-phase unbalance current, and compares the collected
current components with the compensated current send by APF
to obtain the difference, and output to the drive circuit as a
real-time compensation signal, which triggering the converter
module to inject the compensated current to grid to realize
closed-loop control and complete the compensation function.
Dynamic and Steady-state Characteristics of APF
APF is particularly worth mentioning for its superior dynamic
and steady-state characteristics. The figure below shows the
dynamic characteristics of APF when the load changes and the
steady-state characteristics at full load.

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Picture3 Dynamic and steady-state characteristics
Initial Inspection and Installation
This chapter introduces the relevant requirements that must be
considered when selecting the location and wiring of the APF and
its related device.
Due to the particularity of each site, this chapter does not introduce
detailed installation steps, but only provides guidance for installers
in general installation steps and methods, and the installer will
handle it according to the specific conditions of the site.
Attention!
Requires three-phase four-wire or
three-phase three-wire to input power
The standardAPF system can be
connected with three-phase four-wire
(grounding) TN, TT and ITAC power
distribution system (IEC60364-3) and
three-phase three-wire AC power system.
CH1：Mains Voltage；CH2：Mains Current（Compensation Target）；
CH3：Load Current；CH4：Device Current
Dynamic characteristic at sudden load
changes: response time <10ms
Steady-state characteristics at full
load: THDi compensated from >70%
to <3%
CH1
CH2
CH3
CH4

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If used in an ITAC distribution system, a
4-pole circuit breaker should be configured
for the input, and reference can be made to
relevant IT system standards
Warning
The APF can only be powered on with the
approval of the commissioning engineer.
Installation of the APF should be performed
by a qualified engineer with the instruction
of this manual. The APF involved in this
manual is shipped with detailed
mechanical and electrical installation
information.
Danger
Mainly refer to the fatal danger caused by short
circuit, electric shock caused by ungrounded or
contact with liquid.
Make sure the APF is grounded.
Start the APF where liquid around is not
allowed.
Put APF in a high humility environment is not
allowed.
Make sure to remove or open the cover/door with
the APF powered off. In particular, please note
that after the circuit breaker in the cabinet is
powered off, the upper part of the circuit breaker is
still charged, so the upper switch should be
disconnected to ensure absolute safety.
Poor Ventilation
Poor ventilation or heat dissipation can cause
overheating and damage the machine.
Vent openings are not allowed to cover.
If installed in a switch cabinet, ensure that the
heat source has been removed, and the
device is in the air duct of the cabinet.

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Danger
Parts behinds protective cover that require
tools to open are not user-operable parts.
Tearing the anti-tear label without permission
is regarded as giving up the manufacturer’s
maintenance service.
Strong recommendation: Although the
rack-mounted APF has its own circuit breaker,
this manual still recommends users install a
circuit breaker between APF and the mains for
isolation, and disconnect the breaker during
maintenance to ensure absolute safety.
Initial Inspection
Following checks should be done before the APF installation:
1. Visually inspect the exterior and interior of the APF for
shipping damage. In case of damage, notify the carrier
immediately.
2. Check the product label to confirm the correctness of the
device. A nameplate is attached to the device shell to indicate
the APF model, capacity and main parameters.
Position Selection
1. APF installation selection
The APF is designed for indoor installation and should be
installed in a clean environment with good ventilation to
ensure that the ambient temperature meets product
specifications.
The APF is cooled by internal fans, the cool air enters the
APF through the air grille in front of theAPF cabinet, and the
hot air is exhausted through the air grille at the rear of the

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APF cabinet. Do not block the vents.
Due to the air duct isolation, there is no need to install a dust
filter in general environment, but for hash environment, such
as high temperature, high humility, and a lot of conductive
dust environment, please contact our product engineers
when making on-site application solutions, and confirm the
specific heat dissipation scheme.
There is a main touch screen on the front panel of the APF
cabinet, which is used for centralized operation and display
of running status. Each module can independently set its
own parameters and query status.
The APF is installed in a cabinet, there are power terminals
and CT input terminals at the cable inlet end of the APF
chassis. In order to facilitate the maintenance of the APF
during daily operation, in addition to meeting the local
regulations, sufficient space should be reserved for facilitate
maintenance personal to access cables.
Attention!
The installation method is the cabinet mode,
at least 600mm of ventilation space and rear
maintenance space must be reserved at the
front and rear outlets of the cabinet.
If necessary, indoor exhaust fans or air
conditions should be installed to avoid room
temperature increasing.
2. Storage
If there is no need to install theAPF immediately, please
store the APF indoor to avoid excessive humility or high

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temperature.
Device Handling
Attention!
Since the weight of a single APF module is
30kg-55kg, it is recommended to be
transported by two people within a short
distance, if transported over a long
distance, it needs to be completed with the
help of transportation device.
Installation Environment
In order to prolong the service life, the choice of APF position
should ensure:
1. Easy wiring
2. Have enough operation space
3. Good ventilation to meet heat dissipation requirements
4. No corrosive gas around
5. No source of excessive humility and high temperature
6. Non-dusty environment
7. Comply with fire protection requirements
Please observe the environment and conditions in the table below:
Table 3 Installation Environment
Content
Condition
Attention
Altitude
<1500m
Device overvoltage is designed
according to Class III standard
From 1500m to
5000m
The device is derating by 1% for every
100m rise
Temperature
-10~40℃
Below -10℃, heating device should be
installed in the cabinet
Exceeds 40℃, ventilation or cooling
facilities should be installed indoors

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Humility
<90%
For higher requirements, please contact
the manufacture
Installation
Modular
At least 600mm of ventilation space
should be reserved at the front and rear
outlets of the cabinet
Table 4 Conditions of Module Installation
Position
Minimum Required Installation Space
Top
No need
Front side to front door panel
(air inlet)
150mm
Back side to rear door panel (air
outlet)
250mm
Left/Right side
No need

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Touch Screen Size Chart
Picture4 Touch Screen Size