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Splend Electric (Beijing) Co., Ltd
Tel：+86 10 50842888
Fax：+86 10 50842886
E-mail： splend@splendpower.com
Http：www.splendpower.com
Add：52A, No.17 Jing Sheng South 4th Street, Zhongguancun Science and
Tec hnology Park, Tongzhou District, Beijing-China
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Copyright: Splend Electric (Beijing) Co., Ltd. 京ICP备10023425号
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ACTIVE HARMONIC FILTERS
ACTIVE HARMONIC FILTERS
APF Principle
Splend Electric Series APF is connected in parallel with non-linear loads, and uses one set of current transformers (CT) to detect the load current. It calculates each order harmonic current by FFT algorithms in its DSP microchips, and then generates a compensating current with the same amplitude but opposite phase angles to the detected harmonic current, which cancels out the original load harmonics.
The Splend Electric series APF not only eliminates harmonic current from the load side, but it also mitigates harmonic voltage caused by harmonic currents. The APF system can also improve power factor (PF) and correct load imbalances in the power system.
APF Structure
Splend Electric Series APF has a modular design. Usually the Delta active power filter system consists of one or several APF modules and an optional Liquid Crystal Monitor & Control Panel (SD-8T). Each APF module is an independent harmonic filtering system, and users can change the harmonic filtering system rating by adding or removing APF modules.
According to the mounting type, Splend Electric series APF can be divided into Modular APF and Wall-mounted APF.
Modular APF
APF modules and an SD-8T panel can be embedded in Splend's standard APF cabinet or a customized cabinet. There are breakers, cable terminals and Surge Protection Device (SPD) in the APF cabinet.
According to cable terminal type, a modular APF can be divided into two types:
- Draw type modular APF (hot-swappable)
- Fixed type modular APF (not hot-swappable)
Wall-mounted APF
Splend's Wall-mounted APF can be installed on a wall, which is suitable for low rating applications, and an optional SD-8T panel can be fixed on the all-mounted APF according to customer requirements.
Design
- Multifunctional: Harmonic, reactive power and imbalance compensation
- High harmonic filtering rate: Up to 98%
- Excellent reactive compensation: High speed, Precise (-0.99≤PF≤0.99), Step-less, Bi-directional (capacitive and inductance) compensation
- Excellent imbalance correction: Both negative and zero sequence, mitigates neutral current
- Wide input voltage & frequency range, adapts to tough electrical environments
- Low thermal loss (≤3% of rated APF kVA), efficiency ≥ 97%
- High stability: Infinite impedance to grid, avoids harmonic resonance problems
- Flexible application: Modular design, embedded in standard or customized cabinet
- Easy installation and maintenance: Plug-in installation for APF module replacement and expansion
- Wide capacity range: 30A~600A for a single cabinet, up 10 cabinets in parallel
- Environmental adaptability: -10~50°C temperature, compatible with diesel generator
- Complete protection: Grid Over/Under voltage, APF over current, over temperature, and more. All faults are recorded in the event log, which is convenient for failure analysis
Technical Data
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Product Type |
SD-ADF-***M/3L |
SD-ADF-***M/4L |
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Rated voltage |
220VAC±10% |
400VAC±10% |
690VAC±10% |
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Rated frequency |
50（60）Hz±3%，With automatic frequency sweeping function |
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Plant type / number of phases |
3 phases, 3 wires or 3 phases, 4 wires |
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Main network distribution |
TN or TT |
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Harmonic compensation |
up to 52th , individually selectable |
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Cosφ pfc |
from 0.7 inductive to 0.7 capacitive |
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Dynamic load balancing between phases |
prevents neutral overloading |
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Rated current |
30A -50A-100A-150A for each module |
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Parallel units
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up to 5 in the same cabinet, 600 A total possibility of operation of several units in parallel |
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Response time |
< 200μs |
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Overload capability |
2.5 In (x 10ms) |
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Switching frequency |
20kHz or 24kHz |
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Inverter topology |
3 levels IGBT switch for low losses |
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Current limit |
rated current |
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Protections |
protections against overload, shortcircuit, overheating, overvoltage and undervoltage |
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Grid resonancy detection |
with blocking resonancy currents |
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Transformers current
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no. 3 CTs rated from 100A/1A and 2500A/1A (not supplied) no. 3 CTs rated from 100A/5A and 6000A/5A (not supplied) |
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Graphic interface |
7”display touch screen unit for commissioning and monitoring. Includes Ethernet interface |
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Operation mode |
Automatic or Manual |
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APF module capacity Modular system |
400V: 30A□ 50A□ 75A□ 100A□ 125A□ 150A□ 690V: 50A□ 75A□ 100A□ 125A□ |
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Multiple modules can be used in parallel |
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APF Cabinet capacity |
400V:30~600A; 690V:50~500A; |
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Protection degree |
IP32 (for floor mount cabinet) IP20 (for wall mount version) IP54 (optional for floor mount) |
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Colour |
Optional |
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Cooling |
forced ventilation |
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Ambient temperature |
from -15°C to +45°C full performance, derating up to 55°C |
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Relative humidity |
<95%, non condensing |
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Altitude |
2000m, 4000m max with derating |
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Certificates |
CE, ROHS |
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Technical parameter
Inquire about the company or Email:splend@splendpower.com