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Delta Active Harmonic (Power) Filter
Delta Active Harmonic (Power) Filter - Image 2
Delta Active Harmonic (Power) Filter - Image 3

Delta Active Harmonic (Power) Filter

APF Principle

Delta’s PQC 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 PQC 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.

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  • Description
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Description

Note: CT is a critical part of the APF system, and it can be purchased by users themselves, following Delta’s suggestions on CT specification. APF Structure Delta PQC Series APF has a modular design, which adopted 3-level inverter topology with 3 pcs modular IGBT and DC capacitor components, and the Delta Active Power Filter system consists of one or several APF modules and a 7'' or 10'' HMI display. 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, Delta PQC series APF can be divided into Modular APF (rack mounting) and wallmounted APF. APF Module and Cabinet Solutions According to cable terminal type, a modular APF can be divided into two types:. Drawer type modular APF (adding pluggable accessories on power cable terminals) Mixed fixed type modular APF (Power cables are fixed from rear side, Signal cables are fixed from front side) HMI has two types: 7’’ HMI 10’’ HMI APF modules and HMI panel can be embedded in Delta’s standard APF cabinet or a customized cabinet. There are breakers, cable terminals and Surge Protection Device (SPD) in the APF cabinet. Delta can supply IP30, IP42, IP54 or customized solutions. Wall-mounted APF Solutions Delta’s Wall-mounted APF can be installed on a wall, which is suitable for low rating applications, and wall-mounted type HMI can be installed on the wall-mounted APF module, along with a mounting bracket to provide support and protection. Delta can supply IP30, IP42, IP54 or customized solutions.

Specification

TECHNICAL SPECIFICATIONS
Mixed Fixed Type
Rated VoltageAC 208 V, AC 400 V, AC 690 V
Electrical Specification
Input Voltage Range AC 208 V: AC 166~250 V
AC 400 V: AC 308~456 V
AC 690 V: AC 384~880 V
Electric Connection AC 208 V & 400 V: 3P4W, 3P3W
AC 690 V: 3P3W
Rated Current per Module AC 208 V: 50 A, 75 A, 100 A, 150 A
AC 400 V: 30 A, 50 A, 75 A, 100 A, 150 A
AC 690 V: 100 A
Rated Current per Cabinet AC 208 V: 50~750 A (Module combination)
AC 400 V: 30~750 A (Module combination)
AC 690 V: 100~500 A (Module combination)
Rated Frequency50(60) Hz ± 10%
Input Voltage THD Range≤ 15%
RedundancyEach module is an independent filtering system
Harmonic Elimination Range2nd~50th order (Selectable)
Harmonic Filtering Degree0~100% programmable per harmonic in Ampere value
Harmonic Filtering Performance Filter up to 98% harmonics at rated load
THDv < 3%, THDi < 5% after filtering
Reactive Power Compensation CapabilityBoth inductive and capacitive reactive power
Reactive Power Compensation PerformanceCosφ ≥ 0.99 after compensation (if the APF capacity is sufficient)
Imbalance Correction CapabilityMitigate negative and zero sequence
Full Response Time< 10 ms
Instant Response Time< 100 us
Thermal Loss AC 208 V: ≤ 5% of APF rated capacity
AC 400/690 V: ≤ 3% of APF rated capacity
Output Current LimitationAutomatic (100% rated capacity)
Parallel Expansion (System)Up to 10 Racks (7 modules per cabinet)
MTBF> 100,000 hours

Application Scenarios

Product PDFs

Description

TECHNICAL SPECIFICATIONS
Mixed Fixed Type
Rated VoltageAC 208 V, AC 400 V, AC 690 V
Electrical Specification
Input Voltage Range AC 208 V: AC 166~250 V
AC 400 V: AC 308~456 V
AC 690 V: AC 384~880 V
Electric Connection AC 208 V & 400 V: 3P4W, 3P3W
AC 690 V: 3P3W
Rated Current per Module AC 208 V: 50 A, 75 A, 100 A, 150 A
AC 400 V: 30 A, 50 A, 75 A, 100 A, 150 A
AC 690 V: 100 A
Rated Current per Cabinet AC 208 V: 50~750 A (Module combination)
AC 400 V: 30~750 A (Module combination)
AC 690 V: 100~500 A (Module combination)
Rated Frequency50(60) Hz ± 10%
Input Voltage THD Range≤ 15%
RedundancyEach module is an independent filtering system
Harmonic Elimination Range2nd~50th order (Selectable)
Harmonic Filtering Degree0~100% programmable per harmonic in Ampere value
Harmonic Filtering Performance Filter up to 98% harmonics at rated load
THDv < 3%, THDi < 5% after filtering
Reactive Power Compensation CapabilityBoth inductive and capacitive reactive power
Reactive Power Compensation PerformanceCosφ ≥ 0.99 after compensation (if the APF capacity is sufficient)
Imbalance Correction CapabilityMitigate negative and zero sequence
Full Response Time< 10 ms
Instant Response Time< 100 us
Thermal Loss AC 208 V: ≤ 5% of APF rated capacity
AC 400/690 V: ≤ 3% of APF rated capacity
Output Current LimitationAutomatic (100% rated capacity)
Parallel Expansion (System)Up to 10 Racks (7 modules per cabinet)
MTBF> 100,000 hours

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