• The Activar is used for relatively stable loads such as commercial buildings, hospitals and data centers. The Activar is utilized for slow variations of reactive energy demand.
• The Equalizer is used for dynamic loads such as plastic injection/extrusion, auto industries, motor startup, port cranes and more. The Equalizer is utilized for fast or extremely fast variations of reactive power demand. Also available: Equalizer single phase and dual phase.
• While the structure of both systems is similar, the controllers are designed for real time controls and measurements for the Equalizer and slow response for the Activar . The following descriptions and explanations refer to the Equalizer System only.
Power quality is a term used to define any voltage, currentor frequency deviation which may result in failed equipment, 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 device designed to fix power quality issues. The equalizer is typically installed near the main service and major distribution panels.
Voltage Sags (voltage Drops, Under –Voltage)
Voltage sag, also known as voltage dips or under-voltage are mostly caused by local loads, either during motor startup or by rapid changing loads. This condition is characterized by low power factor and high reactive energy demand. The Elspec Equalizer’s ultra-fast technology is designed to act in these specific conditions. It connects all required capacitor banks in 2/3 cycle typical (1/4 – 1 cycle max.), compensating for the total reactive energy of the event. Moreover, it changes the direction of the voltage drop vector to minimize the sag. As a result, the voltage sag is minimized and in many cases, even eliminated.
Voltage Flicker is defined as fast, repetitive voltage fluctuation normally associated with rapid loads, such as spot welders. The Equalizer’s control technology connects and disconnects all required capacitor banks in 2/3 cycle typical (1/4-1 cycle max.), allowing to effectively reduce the flicker to acceptable levels.
In many cases, low power factors result in higher utility bills, penalties and increase in demand charges. They also cause system energy losses, overheating, higher maintenance costs and low service utilization. The Elspec Equalizer is the foremost solution for dynamic low power factor correction. It eliminates utility penalties, contributes to saving energy and reduces maintenance costs, and also maximizes service utilization.
Harmonics (Non linear loads )
High harmonic voltages and currents cause significant energy losses and overheating. It could dramatically increase site vulnerability to failures or fire risk.
Spikes can generate significant damage to the equipment, and produce unpredicted power supply failures with a degradation of the capacitors. The equalizer solution uses transient-free switching technology to eliminate all spikes associated with conventional capacitor switching. The results are longer capacitor life expectancy, less maintenance and better network reliability
Higher service utilization is a constant wish of all electricity users, whether the power is provided by the utility, generators or other local generation such as wind turbines. By using the equalizer the existing service utilization may dramatically increase by reducing the average current and stabilizing current fluctuations. Existing installations show service utilization increases of up to 60%.
In addition to power factor and other power quality issues, there is sometimes a need to maintain voltage levels within certain limits due to sensitive equipment or other facility requirements. The Equalizer voltage control option offers 6 different voltage control levels. The voltage control operates in parallel with the power factor control and in fact, complements it.