Equalizer
8Pages

Complete compensation in 2/3 cycle typical (1/4 - 1 cycle max.) Energy savings Significantly reduce voltage drops & flickering Harmonic filtration Transient-free switching Improve service utilization Enhance local power generation capacity

Capacitor Group Switching The EQUALIZER switches capacitor groups on and off using state-of-the-art electronic switches. The connection and disconnection of capacitors occur precisely at zero-current crossing. This smooth connection avoids transient effects typically created by electromechanically switched power factor correction (PFC) systems, extending the life expectancy of the EQUALIZER dramatically. Each group SCAN Mode The EQUALIZER is equipped with a unique SCAN feature that protects capacitors from exploding and contributes to longer life expectancy by reducing over-current and...

The EQUALIZER Power Quality Solution Definition Power Quality is a term used to define any occurrence of voltage, current or frequency deviation that results in equipment failure, process interruptions or power system inefficiency. These deviations can manifest themselves in harmonics, power factor, voltage sags/swells, voltage flickering, transients and many other forms. The EQUALIZER from Elspec is an all-in-one solution for power quality problems, typically installed near the main service and near major distribution panels. Voltage Sags (Voltage Drops, Under-Voltage) Voltage sags, also...

Welding Machines Spot welding loads fluctuate extremely rapidly and consume large amounts of reactive power. Due to high current changes caused by the near-instantaneous reactive energy consumption, large voltage drops are produced. These sags reduce weld quality and decrease welding productivity. Additionally, these loads often create a high incidence of voltage flickering, which frequently exceeds recommended IEEE limits. Elspec's real-time EQUALIZER benefits: •Improved weld quality and reduced scrap/rework • Increased process output •Reduced voltage flickering • Enhanced service...

Applications (cont.) Harmonics Filtration Utilities generate an almost perfect sinusoidal voltage. Harmonics, created by nonlinear loads such as variable speed drives, power rectifiers, inverters etc., cause nonlinear voltage drops and change the sinusoidal nature of the voltage. When reactive energy is compensated using capacitors, there is a frequency at which the capacitors are in parallel resonance with the power source (high impedance). If the resonant frequency occurs in proximity to one of the harmonic sources, current can circulate between the supply and the capacitors, resulting in...

The Controller A digital signal processor (DSP) and a VLSI component form the basis of the controller's technology. It features an LCD display, analog and digital circuitry, precise firing algorithms and optional communication capabilities. The controller has 9 input channels: 4 voltages (for Wye networks), 3 main currents and 2 internal system currents. The information obtained from these measurements is used for Fast Fourier Transform (FFT) analysis, performed each network cycle on all channels. The advanced control algorithm, which includes unique patent-pending technology for fast...

Switching Module The switching module is comprised of solid-state switching elements that provide reliable, high-speed, transient-free operation. Single, double or three-phase electronic switches, SCR/SCR or SCR/diode, are used for each capacitor group. Switching modules are specifically selected for each EQUALIZER system based on the number of overall capacitor groups, current requirements and voltage ratings. Capacitor/Reactor Modules Iron Core Reactors Each Elspec EQUALIZER includes specially designed, iron core reactors used in series with the capacitors. Each reactor is manufactured...

Complete System Ordering Information System Total Step No. of Nominal Nominal Reactors Network Group Cable Cable Type Power Size Groups Voltage Frequency Percentage Typology Protection Connection Entry System Type Example: EQ 300:60:3-400.50-P7-WFSA 300kVAr real-time complete Equalizer system with 5 steps of 60 kVAr with 7% inductors, for 400V/50Hz 4-wires Wye network. Dimensions (W*D*H): 800*600*2100, Short Circuit 35kA, IP 20 Specifications are subject to change without notification. Elspec is a registered trademark. All trademarks are the property of their respective owners. Copyright ©...