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Battery Chargers | Cable Accessories | Cables | Connectors | Harmonic Filtering | Insulators | Metering | Molded Plastic
Panels | Power Factor Correction | Scada and RTU | Substations | Surge Protection | Switches | Telecom
Temperature Control | Transformers | UPS | Utility Products | Wireless Communication

Harmonic Filtering

Manufacturer: Schaffner Harmonic Filters, Harmonics Limited and Olsun

Active and Passive Harmonic Filters for Delta Systems by Schaffner Harmoic Filters:

Schaffner is uniquely able to offer both passive harmonic filters and active harmonic filters for the efficient mitigation of mains harmonics, worldwide. Innovative filter technology, a user-friendly design, as well as sophisticated technical support enable our customers to achieve their individual Power Quality goals quickly and cost effectively.

Schaffner harmonic filters help to obtain compliance with international standards like IEEE 519-1992 and with local utility codes. They reduce the electrical and thermal stress upon the electrical infrastructure, eliminate the risk of harmonics-related reliability problems, and support long-term energy efficiency and cost savings.

Schaffner active and passive harmonic filters are UL listed and CE marked, ready for international use.

Harmonic Suppression System Technology by Harmonics Limited:

Harmonics Limited utilizes a patented Harmonic Suppression System Technology
“HSS” which blocks 3rd harmonic currents in electrical distribution systems. Designed as an completely passive system architecture, these products require minimal maintenance, while offering the highest reliability option available in the industry. The “HSS” technology is used in three key applications, whereby mostly the packaging of the system changes to meet every demanding application; 1) configured to be coupled with a transformer to mitigate 3rd harmonics in the power line neutral (15KVA to 1000KVA standard, to 1500KVA custom product), 2) configured to be placed in parallel with generators to mitigate 3rd harmonics in ground currents ( up to 2000kW for delta or wye configurations), 3) configured as a high frequency voltage attenuator upstream to IGBT motor drive applications (up to 500HP in 480V, 240V, and 208V IGBT drive applications).

• Harmoinc Limited SysteMAx3
• POWER QUALITY ANALYSIS FOR HARMONICS LIMITED
• Guide Specification for Harmonics Suppression System for Three-Phase Wye Distribution Systems

 

Harmonic Mitigating Transformers (HM-20, HM-30) by Olsun:

The HM-20 and HM-30 style transformers have been specifically developed for use within distribution systems having a high density of non-linear loads, i.e. personal computers, video display terminals, fax machines, copiers, electronic high efficiency ballasts, UPS systems, variable speed drives, various electronic monitors. The nature of all these loads is non-linear; they only demand current during part of the cycle and/or change their impedance during the voltage cycle. These loads create harmonic currents, which in turn generate heat in the distribution equipment, neutral conductors and distribution transformers.

Numerous methods have been incorporated to deal with the effects of this phenomenon on the transformers in the circuit:

1. The transformer can be oversized. This not only results in a higher cost for the transformer initially, but a higher cost of operation for the life of the transformer. It's a classic case of treating the symptom not the cause.

2. The transformer can be specifically designed to withstand the effects of the harmonic currents generated by the loads. The K-rated transformer was developed to fulfill this task. Various K-ratings were established and described by the standards to deal with specific levels of harmonic currents. When properly applied, K-rated transformers provide a lower initial and operating cost. However, they can still be seen as simply a better method of treating the symptom.
3. The Olsun HM line of transformers incorporates design features that treat the causes of harmonic distortion. The secondary windings are configured to provide a phase shift with a low zero sequence impedance to provide a harmonic cancellation element. Electrostatic shielding is provided to minimize the broadcast of electrical noise from either the primary or load side to the other. The result is a transformer that can continuously carry its rated load and perform with maximum efficiency with load profiles up to K-20 with the HM-20 model and K-30 with the HM-30 model.

Standard Features of the Olsun HM Series Transformers

* Ratings - Through 5000 KVA and 34.5 KV
* Conductor and electrostatic shield material - Copper
* Temperature rise at full load - 115º C above 40º C maximum ambient (80º C available)
* Insulation system - UL listed, Class R, 220º C insulation
* Overload ability - 15% Continuous
* Zero Sequence Impedance and Reactance - less than 0.95% and 0.3% respectively
* Impregnation - Vacuum Pressure Impregnated (VPI) using 100% solids epoxy resin
* Electrostatic Shield – Single (HM-20), Double (HM-30)
* 200% Rated Neutral
* Thermal Switches - one per coil
* Efficiency Rating - Minimum 98%. Meets or exceeds Energy Star and NEMA TP-1 specifications
* Temperature protection - thermal switches provided in each coil
* Harmonic Cancellation - 3rd harmonic cancellation accomplished with secondary winding design
* Enclosures - NEMA-1 standard with an ANSI 61 gray, durable powder coat finish; NEMA-3R, 4 or 12 available
* Dimensions - See "Dimension Page" link. On request, smallest size will be maintained compatible with good wiring practices, custom dimensions are available
* Surge Suppression available
* Manufactured in the United States

Third party certification - UL, CSA labeled (CE label on request)