Active Voltage Conditioner

The Active Voltage Conditioner (AVC) provides rapid, continuous voltage regulation, correcting voltage sags, swells and prevents downtime. The AVC has no batteries or storage.

The AVC is specifically designed to handle dynamic load conditions commonly found in industrial environments, including:

  • High inrush currents
  • High harmonic distortion levels
  • Regenerative power from robotics, elevators, and other regenerative loads.

A voltage sag (North America) or voltage dip (IEC) is a reduction in RMS voltage of 10% or more below the nominal voltage range for a period of 1/2 cycle to 1-min as defined in the IEEE 1668 standard.

How the AVC works

The AVC consists of a rectifier, inverter and a series injection transformer, which is connected between the supply and the load.

The AVC corrects voltage phase angles and amplitudes within 3 milliseconds by drawing additional current for the duration of the sag. It requires no battery storage. It also provides continuous regulation within +/-10% from the nominal utility voltage.

An internal bypass prevents the load from dropping if an internal overload occurs.

Key Features & Specifications
  • Industrial Power Conditioner without battery or energy storage
  • Industrial-grade voltage sag and surge correction
  • Correct both the phase angle & magnitude in less than 3 ms
  • Up to 30 seconds of voltage sag ride-through at 3ph voltage > 50% nominal
  • 99% efficient at full load
  • Does not lower fault capacity
  • Continuous voltage regulation ± 10%
  • Voltage unbalance correction
  • Voltage event capture
  • High-value production processes
  • High-speed manufacturing
  • Continuous and critical processes
  • FDA approved processes

Download AVC Technical Paper


Download Data Sheet

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Frequent Ask Questions

Why would I use an AVC instead of an industrial UPS?

An industrial UPS is a solution for many problems. However, they are inherently very expensive, not only to purchase but to operate and maintain. The AVC is typically more efficient and requires very little annual maintenance. Based on North American data, it will correct >92% of all events at your plant.

Many customers report that the payback period has been less than 6 months.

What is a voltage sag?

A voltage sag is a short duration decrease in the RMS voltage of an electrical power system below the nominal voltage. Voltage sags are typically caused by:

  • Faults on the power system e.g., lightning, storms, tree branches and animals
  • Large motor or transformer in-rush currents

The duration of a voltage sag can vary from ½ cycle to one minute.

Is voltage unbalance a real problem?

Yes, voltage unbalance is a real problem. When it exceeds 2%, it can cause premature failures in motors and electronics as they draw excess current. Balancing the voltages can not only reduce electricity consumption, but also improve equipment performance and efficiency. The AVC provides continuous correction of voltage unbalance to ensure optimal operation.

IEC 61000 Standard by IEC

IEC 61000-4 is an international standard from the IEC which defines procedures for testing and evaluating the immunity of electrical and electronic products to electromagnetic interference (EMI).

IEC 61000-4-30 sets the requirements for measuring and assessing power quality characteristics. Part 4-30 set the testing and measurement techniques like the measurement method, accuracy and time aggregation for analyzers to record the different parameters.

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