plants experience increase and power pollution day by day due to the use of non-linear equipment such as variable frequency drives, rectifiers, dc drives, induction furnaces etc. These non-linear loads drawn on-sinusoidal current from a sinusoidal voltage source, thus creating current distortion. Current distortion can result in voltage distortion and the spread of power pollution wherever that voltages supplied.
range: 11kw to 1000kw
effects of power pollution
over voltage / current in the distribution network.
over heated power cables due to skin effect and copper and iron loss in transformers,motors and generators.
overheating in all types of electronics systems causing components failures.
nuisance tripping in circuit breakers and protection relays.
malfunction of automatic control systems.
damage to capacitors due to resonance.
inaccuracy of instrument measurement.
interference in telecommunications systems.
voltage distortion and lagging in power factor.
mitigation of harmonics
wherever there is a 6-pulse rectifier at the input of variable frequency drive, ups or there is a 6- pulse rectifier supplying the common link to which number of variable frequency drives are connected, the input harmonic distortion of current is 62%. Due to presence of harmonics the effective power factor (which is a product of displacement factor and distortion factor) is less (of the order of 0. 8). If variable frequency drives has regenerative load like centrifuge or lift lot of power is dissipated in dynamic braking across the dc link. Active front end converter (afc) can take care of these three problems in totality due to its capacity to work in four quadrants.
it reduces the total harmonic distortion of input current to less than 5%.
it can improve the input power factor up to unity.
it can feed back the regenerative power to mains so that energy can be conserved.
amtech's axpert-afc active front end converter offers all these advantages and can serve many applications such as:
countermeasure for power source harmonic wave .
water & drainage works, cable car, lift, blower etc.
power source regeneration.
kinds of tester, crane, elevator, centrifugal separator, kinds of line drive etc.
common converter.
kinds of line drive, rotary press of news paper etc.
The axpert-passive harmonic filter system is designed to suit industrial application for harmonic the amtech multi-functional active filter solves all problems caused by harmonics in power sources and loads (equipment).
harmonics suppression
reduction of harmonics and voltage distortion, and prevention of equipment overheating and disoperation
power factor improvement
power factor - 1 by reactive power compensation
imbalance compensation
relieving the generator burden through compensation for negative- phase-sequence components.
voltage stabilization
prevention of voltage drop through reactive power compensation
applications:
the amtech multi-functional active filter can compensate for reactive currents of fundamental waves, harmonic currents, etc. As such, there are many applications if its functions are adequately combined.
intelligent buildings
oa equipment, air conditioners, lighting, ups, elevators, pumping facilities
factories
crane facilities, press machines, machine tools, high frequency induction heating equipment, inverter-incorporated facilities, printing machines, paper machines
public facilities
city-water and sewage pumping facilities, harbor crane facilities, crane facilities at waste incineration plants
dynamic voltage compensators monitor and control voltage to sensitive equipment connected across the power grid. Often sensitive equipment such as induction motors industrial pcs, dcs etc. Malfunctions whenever there is a voltage sag or swell of 50% or more around its nominal value. This malfunctioning can lead to loss of productions waste of raw material and man-hours. Such voltage disturbances last for short periods often less than 10 to 15 cycles. In such cases a ups becomes bulky and uneconomical solution. Servo stabilizers cannot give fast and sufficient correction. Other equipment such as transformers, tap changes, and line voltage conditioners do not have fast enough response and required power capacity. Hence under these conditions a dynamic voltage compensator (dvc) is the only solution.
applications :
the amtech multi-functional active filter can compensate for reactive currents of fundamental waves, harmonic currents, etc. As such, there are many applications if its functions are adequately combined.
semiconductor manufacturing plants.
process computers.
paper industries, wire-winding / unwinding processes, where motors run in synchronously and a drop in voltage may disturb the process.
the axpert-passive harmonic filter system is designed to suit industrial application for harmoni c filtering. Harmonics are generated by non-linear loads connected across the line. Harmonics cause nuisance tripping of electronics devices and circuit breakers, program corruption or malfunction of plcs,extensive heating of cables, busbars, transformer and motors.
amtech's filter is a harmonic trap type. An engineering evaluation is recommended to determine specific conditions. Amtech's filters are tuned to divert the unwanted frequency currents away from the power source.
Variable Frequency Drives offer many advantages such as energy conservation, ability to control speed precisely and accurately, improvement in product quality and productivity, etc. However the output of VFD is a PWM-wave, which is far from a pure sine wave. Due to this AVFD can create problems such as:
Increased heating of AC motors.
Degradation of motor winding due to additional voltage spikes applied to motor windings, when the distance between motor and inverter is more than 50 meters
Increased motor-audible noise.
Reduced motor efficiency
Increased heat in motor bearings, reducing the motors life.
Sinus filter, if properly applied results in following ADVANTAGES:
Increased motor life due to reduced harmonics, less heating, elimination of bearing current
Reduced motor audible noise.
Elimination of voltage spikes on motor winding, due to very long cable between motor and inverter,
Jay Bee Enterprises / Neel Industries Manufacturer and supplier of Torch such as gouging torch, torch, pneumatic gouging torches, automation gouging torches, electronic Torch, precision Torch and industrial gouging torches.
Zaveri Computers Dealing and supplying switch mode power supply such as computer switch mode power supplies, output switch mode power supplies, input switch mode power supplies and voltage switch mode power supplies.
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