TCI Trans-Coil Frequently Asked Questions FAQs How To Instructions Distributors
TRANS-COIL Frequently Asked Questions Distributor
TCI Trans-Coil Frequently Asked Questions FAQs How To Instructions Distributors
TCI Trans-Coil Frequently Asked Questions FAQs How To Instructions Distributors
February 19, 2009

SymCom Monitors

Last Fault Diagnostics is also viewable. When a harmful condition is detected, the 520CP's output relay is deactivated after the specified trip delay. The output relay reactivates after the appropriate RD2 or RD3 timer has expired. If the pump is started on a single-phase or a reverse-phase condition, the Model 520CP deactivates its output relay in 0.5 seconds. SymCom's Model 520CP is a fully programmable, microcontroller-based, current sensing device designed

NK Transducers

The ATPR Series RMS AC Current Transducers combine a current transformer with a true RMS signal conditioner in a single package. ATPR Series AC Current Transducers produce a 0-5 or 0-10 VDC RMS output on distorted waveforms found in the output of variable frequency drives, phase angle fired heating controls and on linear loads in "noisy" power environments. The ATPR Series AC Current Transducers are available in split-core housing only.



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Trans-Coil International is the premier supplier of peripherals for AC & DC drives and a respected partner of premier manufacturers of drives and drive distributors worldwide. Our products include active harmonic filters, passive harmonic filters, drive output filters, line reactors, and other high quality products that increase the value and improve the overall system performance of power inverters.

If you are looking for Trans-Coil (TCI) Products, please call us at (800) 894-0412 or email us at we will do our best to help you find the TCI Filters that you are looking for at the most competitive prices possible. If you are searching for Trans-Coil Drive Reactor technical information (data-sheets) please use the Trans-Coil datasheets or product selection guide page links.

What is the Short Circuit Current Rating for reactors?

Reactors are exempt per UL508A SB4.2.1.

Does it matter which way I wire through the reactor?

No, so long as you are consistent for all three phases.

What is the impedance of the KDR Reactors?

KDR Low Z reactors are 3% and High Z is 5%. The output reactors are 1.5% Z.

What is the HG7?

The HG7 is a HarmonicGuard Series Drive-Applied Filter. The HG7 not only limits current distortion to less than 7% TDD, it also improves power factor to near unity. Multiple package options allow TCI customers to choose the right filter configuration for their application. Since every power system is different, harmonic mitigation requirements will differ, and even IEEE limits change based on the system loading characteristics. The HG7 product returns the power of choice to the customer, allowing for different configurations to achieve different performance and monitoring results.

Which applications are best addressed by the HG7?

The HG7 is used where drives are a significant portion of the load. Prime candidates for filtering are installations of variable frequency inverters or adjustable speed devices in facilities where those drives represent a significant portion of the load, or when specifications call for limited harmonics (like IEEE 519, 1992).

Will the power factor drop off as the load drops off?

No, the performance doesn't fall off with the load. HG7 performance is superior at 100% and 50% load.

What causes unwanted high frequency electrical noise?

These frequencies can be from either noise conducted through power lines or radiated through the air onto the power lines.

Is there a difference between EMI and RFI?

The terms EMI and RFI are often used interchangeably. EMI is actually any frequency of electrical noise, whereas RFI is a specific subset of electrical noise on the EMI spectrum. There are two types of EMI. Conducted EMI is unwanted high frequencies that ride on the AC wave form. Radiated EMI is similar to an unwanted radio broadcast being emitted from the power lines. There are many pieces of equipment that can generate EMI, variable frequency drives included. In the case of variable frequency drives, the electrical noise produced is primarily contained in the switching edges of the PWM controller. As the technology of drives evolves, switching frequencies increase. These increases also increase the effective edge frequencies produced, thereby increasing the amount of electrical noise.

What is the difference between Common Mode noise and Differential Mode noise?

Common mode noise is the electrical noise on all power lines with respect to ground. Differential mode noise is the electrical noise on one line with respect to another line. When considering a filter for use in a variable speed drive application, it is important to note that common mode noise reduction is the most important factor. Variable frequency drives produce very little differential mode, or line to line, electrical noise due to the presence of DC bus capacitors.

Is startup factory commissioning required?

Factory commissioning is not required. TCI H5 series should be fully operational immediately upon installation per the guidelines within the Installation, Operation, & Maintenance manual.

Are communication and control features available with the H5?

Yes, there is an RS232 com port and relay contacts for remote start/stop and fault alarm indication.

Will the H5 correct displacement power factor?

The H5 will keep the current in phase with the line voltage, however, if it reaches full capacity, the distortion power factor will increase and the total power factor (KW/KVA) will decrease from unit. If additions to the system cause the H5 to reach full capacity, additional H5 units can be installed to correct the situation.

Can the factory settings be changed to correct displacement power factor before attenuating harmonics?

The H5's programming can be changed to accommodate the adjustment in primary functions; however, this would become a custom filter.

Can the H5 be applied on systems containing DC drives?

The H5 is not currently configured to operate on DC converter loads.

What is the maximum lead length I can use with Trans-Coil V1000?

With the V1000 we are being more informative on field applications to ensure our customers are well informed as to application guidelines. The standard product is promoted for use on standard drive applications out to 1,000 feet of lead cable when setting up the system with a given set of drive and wiring parameters. We are also offering an "Extended Length" version which is designed for use out to 3,000 feet of lead cable. A complete description of the application parameters are listed in the brochure and on the website.

How do you size the V1000?

The V1000 is rated and sized the same as the KLC output filter. It is a drive output filter that is designed to a 600 volt class and is sized by the full load current of the applied motor load. Sizing information can be found on the TCI website or by contacting TCI Technical Support.

Can I use the V1000 on multiple motor applications?

The V1000 can be used on multiple motor applications. We recommend the use of no more than 10 motors with a total lead length of 1,500 feet unless the application is discussed with TCI's Technical Support Department.

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TCI Trans-Coil Frequently Asked Questions FAQs How To Instructions Distributors
TCI Trans-Coil Frequently Asked Questions FAQs How To Instructions Distributors
TCI How To Guide Distributor