MULTIMATIC ACTIVE FILTER is a solid-state power converter that brings about the advantages of harmonic currents elimination, improving power quality. These active shunt systems Sense Load Current, Evaluate the high frequency Harmonic Current Components and fundamental frequency Reactive Current Components, Generate and inject out of phase Components to each of these and hence cancel/reduce Harmonic Currents and compensate Reactive Current depending on the level of compensation.

TARGET PROBLEMS Sporadic upsets and defects in electronic control systems and devices Sporadic tripping of circuit breakers for no apparent reason Cables - especially transformers and induction motors - get too hot Motor power drops     Power factor correction systems are overloaded Instruments suffer greatly reduced measurement accuracy or fail completely Harmonic currents flowing into the medium voltage network exceed permissible limits The neutral conductor is overloaded Corrosion of piping and Earthing systems

APPLICATION COMPATIBILITY

• Target remaining harmonic content lower than 3% ITHD(with passive filter max target ITHD is lower than 10%).
• Remarkable reduction of the harmonics of the Eleventh order and higher, where passive filter is not suitable.
• In case power factor is near to the unity, where it is not possible to install further reactive power compensating devices (passive filter is a capacitive load).
• In case of impossibility of use of a reactor in series (with passive filter it could be essential for the use of a reactance in series whenever the load has much lower power with respect to the network power).

OPERATING PRINCIPLE

• Active Filters are Solid-State Power Converters
• Active filters are operated in parallel to the loads that generate the harmonics.
• Measure the Harmonics generated from the Non- Linear Loads
• Generate opposite Phase shifted Harmonics current for the same Amplitude
• They supply all or part of the required harmonic current and cancel the Load Harmonic Current and obtain a Sinusoidal Current in the Utility, so that the current flowing from the supply network (transformer) is less polluted or, in the ideal case, completely free from harmonics.
• The number, size and location in the circuit of active filters depend on the local harmonics spectrum and the specified duties.

CONSTRUCTION & FEATURES ICAR has developed the MULTImatic ACTIVE FILTER to combine a high level of efficiency with flexibility of installation. The Unit will filter all relevant harmonic orders. Can operate in either OPEN or CLOSED LOOP. 3 or 4 wire (Neutral) models are available  and a comprehensive display system is available.

INSTANTANEOUS DYNAMIC RESPONSE

Is derived from IGBT high frequency converter switching at 20KHz using advanced control techniques.

MINIMUM HEAT LOSS

During Operation insertion losses are less than 3% at full compensation, offering significant cost saving in energy.

PARALLEL FUNCTION

Enables the MULTIMATIC FA10 series to be added at later stage in parallel to meet increasing demand.

OPTIONAL GRAPHIC LCD PANEL

A special black back-light offers access to all parameters, waveforms & spectrums for management of both ACTIVE FILTER and system power quality. The graphic LCD display and control panel gives easy access for load, source & AF.

SUPERIOR CURRENT-LIMIT CAPABILITY

AHF will continue to operate in full compensating mode without shutdown or malfunction in the event of additional loads being added. No overload risk on the existing Active Harmonic Filters will occur. Furthermore harmonic resonance risk is absent.

CAPACITY RATINGS

From 25A to 200A may increase the maximum capacity upto 1200A by using parallel technology. 3 and 4 wires versions are available and compensation capability ranges from 3rd till 31st harmonic order. Open and closed loop configuration is available on each Active Filter.
Filter operations are: It Measures the harmonic currents absorbed by the load AF, acts as a controlled current source connected in parallel to the harmonic generating load. This controlled current source produces same harmonic currents as produced by the load but with opposite phase. Therefore the supply system is loaded with fundamental current only.

HARMONIC ATTENUATION RATIO

The compensation ability is defined in terms of Harmonic Ratio (HAR=Ilh/Ish). Typically it is greater than 10.

FEATURES

• Shunt Connection, easy for maintenance
• No problem of Overload
• Harmonic Attenuation Ratio greater than 10
• Instantaneous dynamic response
• Flexible up-grading/redundancy
• User-Friendly LCD Control Panel

CONTROLS & DISPLAYS ON/OFF and Reset (& Alarm Silence) Parameter Setting Selection Parameter Setting Confirmation Parameter Setting Cancellation Power ON Indication Filtering Indication Full Correction Indication Error Indication Measured Value of Power Parameters Voltage and Current Waveforms Harmonic Spectrum

 INSTALLATION OF ACTIVE FILTERS

• In principle, active filters can be operated at any desired location in the low voltage network. It must be considered, however, that the effect achieved will vary, depending on where the unit is installed.
• Active filters can be assigned to an individual load, a group of loads, a sub distribution board or a low voltage main distribution board, depending on the specified duty.
• The current transformers for active filters can be installed as desired either before (line side) or after (load side) the filter's main connection.

The design, size, number and location of the units for any required active filter system depends primarily on the specified duty. It makes a large difference whether the active filter only has to reduce the troublesome parameter sufficiently to ensure trouble-free operation for a neighbouring load, or whether the maximum permissible tolerances must be complied with at all costs. The required duty should therefore be clearly specified.

• It is strongly recommended to carry out network measurements on site in order to select the appropriate active filter and to specify the required duty.
• An active filter is a high-tech instrument that is not entirely undemanding regarding its location. A suitable location is clean and well-ventilated. The ideal site is an air-conditioned electrical service room with an ambient temperature of 25 °C.
• In order for active filters to operate correctly, the current transformers specified in the technical data tables must always be installed.
• To ensure correct trouble-free operation of the active filter it is essential that they are correctly started up and the operating personnel are appropriately instructed.

APPLICATIONS

• UPS Systems acting with Generator Supply
• Commercial Centres, Hospitals, Hotels utilizing Computer Systems / other Appliances
• Battery Charging Units
• Compensation of Printing Machines
• Extruders in Plastic Industries
• Punches in Pharmaceutical Industry

BENEFITS

• Significantly reduced Voltage Waveform Distortion
• Reduced Voltage Drops on Transformers and Cables
• Reduced Temperature rise on Transformers and Cables
• No risk of harmonic Resonance / Improved Power Factor

PRODUCT RANGE & TECHNOLOGY

ICAR FA10 MULTImatic – 25, 50, 100, 150, 200 A - IGBT high frequency converter switching at 20KHz using advanced control techniques

                       TECHNICAL DATA

Specification ICAR FA10 MULTImatic Nominal Voltage 208V/400V/480V + 15 %  Nominal Frequency 50/60 + 3 Hz Configuration 3 Phase / 3 – wire 3 Phase / 4 – wire Compensation Current per Phase 25, 50, 100, 150, 200 A Compensation Current in Neutral 75, 150, 300, 450, 600 A Power Loss 550, 950, 2000, 3000, 4100 W Current Limitation Full rated Compensating Capacity Soft Start 10 Seconds Inrush Current Less than rated Current Filter Action 3rd to 31st Harmonic order Degree of Compensation Comprehensive Compensation (harmonic Attenuation Ratio > 10 Typically) (Sizing to be 25% greater than Total Load Harmonic Current) Reaction Time < 1 milliseconds (Transient Response Time) <40 milliseconds( Total time from Detection to Steady Compensation at 100% step load ) Controller Topology IGBT high frequency converter switching at 20KHz using advanced control techniques. Parallel Operation Maximum Capacity upto 1200 A (6 Units) Type of Current Transformer As appropriate Current Transformer Installed Position At the load side or tine side of the Filter Connection Ambient Temperature +12°C to 25°C (Recommended Range), 0°C to +40°C (Tolerance Range) Relative Humidity <95% Operating Elevation <1000 m above sea level Ingress Protection IP 20 Dimension (WxHxD in mm) 410x390x880     - 25, 50A ( 3-wire) 600x810x1930   - 100, 150 A (3-wire) 1200x810x1930 - 200 A (3-wire) 490x400x880     - 25, 50A ( 4-wire) 700x810x1930   - 100, 150 A (4-wire) 1400x810x1930 - 200 A (4-wire) Weight 55, 70, 230, 260, 430 Kg (3-wire) 60, 75, 270, 300, 540Kg (4-wire) Noise Level 60, 60, 63, 63, 65 dBA (Audible Noise from 1m) Display Graphic LCD Display and Panel Measured value Display RMS value / Harmonic Distortion Waveforms/ Spectrum