When To Opt For Passive And Active Harmonic Filters?

Harmonic filters are a viable and effective solution to handle harmonic distortion within an electrical system. The two most prominent options are active harmonic filters and passive harmonic filters. However, there are plenty of differences between the two. So how do you choose between the two? There are a few factors to consider.

5 Factors To Consider For Harmonic Filter Selection

Harmonic Profile

The first step is to assess the harmonic profile of a given system. What is the frequency of the harmonics, and what are their characteristics? Based on these questions, one can choose between active or passive harmonic filters.

Nature Of Load

The type of load acting on the system also plays a major role in selecting harmonic filters. If it is a stable type of load, then passive harmonic filters are a viable choice. However, if the fluctuation is very significant, then active harmonic filters should be considered.

Cost Effectiveness

Another important factor is the cost-effectiveness of a harmonic filter. This is key because it will determine not only the cost of installation but also maintenance. Passive harmonic filters are a better choice in this regard, as active harmonic filters are significantly more expensive.

Spatial Constraints

The next factor to consider is the space available for the harmonic filter. Active harmonic filters are known for their excellent performance and compact nature. So for smaller spaces, these filters take precedence over passive harmonic filters.

Complexity Of System

How many variable speed drives or non-linear loads are acting on the electrical system? This will also determine the selection between passive and active harmonic filters. The more complex the system, the better it is to opt for the latter.

Therefore, for simple systems with stable loads and no spatial constraints, passive harmonic filters are adequate. For complex systems and varying non-linear loads, active harmonic filters are the best choice.

ADM Engineering Inc. can help you select the ideal harmonic filter for your needs. Our REVCON active, passive, and hybrid harmonic filters are designed for different conditions and specifications. To know more about their specific applications and benefits, reach out to us at 877-236-8337 today.