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For any library, studio, executive suites, luxury residences, hospital-in fact every institution in the above list requires one amenity: peace and quiet. Even noisy electrical equipment must be completely unheard here. It’s been a standard understanding that three-phase voltage regulators (which are crucial for protecting sensitive electrical equipment from mains instability) invariably emit some mechanical noise, such as whirring fans, humming transformers and ticking relays.
The TNSB series offers something completely different, designed for use in any sound-sensitive application that requires a 3 phase servo motor voltage regulator with industrial-grade power protection and acoustic comfort. Here's how the TNSB series maintains near-silent operation:
Understanding Noise Sources in Conventional Voltage Regulators
All the most common types of regulators produce sounds mechanically. Among other causes for total sound level generated:
Relay switching: whenever an electromagnetically switched relay kicks in, the mechanism within makes a distinguishable "click" sound. An electrically unstable region that causes numerous fluctuations will cause constant clicking, resulting in intermittent noise pollution.
Servo motor operation: conventional regulators powered by a servo motor will cause low-frequency humming sounds during corrections due to its motor working with a mechanism that uses carbon brushes against an autotransformer. Often this noise may even develop into a "whirring" sound at times during its voltage corrections.
Transformer vibration: Magnetostriction occurs in all transformers—the core expands and contracts slightly at double the line frequency (100Hz or 120Hz). This is an audible hum if not properly damped.
Cooling fans: in high powered units, some cooling fans are incorporated to reduce heat buildup, contributing an extra layer of "white" noise from the broadband fan operations.
In quiet environments these combine into noticeable noise pollution. One regulator may seem insignificant but a few would produce an unbearable noise in rooms where quiet is paramount. The TNSB series have targeted each of these issues:
TNSB's Silent Engineering: Precision Without Disturbance
With a TNSB series 3-phase servo motor voltage regulator, our engineers have gone above and beyond to eliminate every potential sound source in order to deliver the highest grade of performance and quietness. This comes from over 20 years of research and development within our very own 50,000 sq/ft facility, the place where all core components are made from scratch:
Silent relay technology: some protection circuits still rely on relays, in the TNSB units we incorporate solid-state switches or a high-silence electromagnetically switched relays that have had all sharp sounds and 'click' removed from the relay mechanism, In the TNSB, relay operation is completely excluded from the many of our configuration options.
Low-noise servo motor design: the TNSB utilizes balanced, ultra-low noise servo motors in combination with its helical gear train to reduce vibrations and whirring noises, with acoustic-damping mounting. The result of these modifications is voltage correction without audible interference.
Damped transformer construction: Our transformers use magnetic core materials that absorb vibrations. Combined with isolated mounting points and sealed enclosures, this ensures that magnetostrictive humming is contained. As a result, the TNSB's ambient noise floor remains completely undetectable in most environments.
Passive or whisper cooling: units available at most power ratings run with passive, convective cooling, meaning that no fans are necessary whatsoever. However at extremely high power ratings the TNSB units are equipped with only a thermostatic low-speed cooling fan with special baffling. In addition, all fan noise, should it exist, should be much lower than 35dB, that is, less than the volume of a whisper in the library. Furthermore, all the servo correction algorithms used in the TNSB all have very slow speeds. This will reduce any burst of transient sound that commonly results in voltage transition in typical regulator models. Our engineers have taken painstaking steps to eliminate rattling and vibration within all elements of sheet metal, all stages of fabrication, and final assembly.
Ideal Applications for TNSB in Noise-Sensitive Settings
The TNSB series is ideally suited for any setting that requires its users to maintain their required sound levels. This may include, but not necessarily be limited to:
Medical and healthcare facilities: although modern imaging equipment (such as MRIs and CT scanners) can now be fitted with special suppressors, sensitive monitoring equipment and entire hospital networks rely on a constant power source without any noticeable sounds emanating from electrical supplies. Our TNSB units are located in equipment rooms, completely away from patient room, exam rooms and OR.
Recording studios and broadcast centers: recording studios, film studios and live broadcasting environments require that there be absolutely zero interference from the mains supply and no mechanical noise from the regulator itself. With a TNSB, artists will have no reason to worry about extraneous sounds disrupting their work. These stabilizers can be mounted on walls, floors, or even in a ceiling cavity depending on the configuration.
Luxury hotels and executive offices: luxury accommodations and executive offices always expect guests to feel comfortable and at home, and this doesn't include listening to noisy electrical equipment in an electrical closet. The TNSB series allows sensitive electronics (such as point of sale, HVAC, security systems, etc.) to be powered without interfering with guest or customer comfort.
Libraries, museums, and galleries: where preservation is key and quiet is essential for patrons to focus on their activities. Any fluctuations within the mains supply must be compensated for rapidly and effectively but with minimal noise pollution to create the perfect reading environment. Our regulators assist to preserve important historic artifacts and artworks, which enables them to be operated. They also allow climate controls to run.
High-end residential and home theaters: modern homes can come complete with integrated home cinemas, sound studios and the like, in these types of homes a three-phase supply might even be necessary, and where this is present, our quiet regulators allow you to keep the integrity of your home theater setup or private study, ensuring that you are not distracted during film viewing, recording, or reading.
Device Compatibility and Installation Best Practices
In order to install your TNSB for a quiet application, take the following compatibility/installation constraints into consideration.
Compatible devices: It is advisable to use the TNSB to protect any three phase equipment susceptible to unstable voltages. It will work well with HVAC, medical imaging equipment, restaurant equipment, industrial servers, elevators and controls for lighting. It utilizes the servo motor principle for precise regulation of the voltage, typically with an accuracy range of 1-3%.
Power ratings: The TNSB can accommodate anything from the smallest shop to an entire building from 10kVA to >1000kVA and we will calculate your specific needs for you.
Installation tips for noise control: Even the most advanced, low noise voltage regulators can transmit vibration to rigid surfaces through mounting connections. When installing a TNSB in a quiet application we advise you to:
Use a rubber isolation mounting plate or brackets between the regulator and floor or wall.
Place it in a dedicated electrical closet or room, though it's unlikely that you'll need it, given the TNSB's inherent low noise operation.
Provide adequate ventilation for passive cooled units to avoid the activation of its cooling fans.
Have you technician place and activate the unit during commissioning in order to check for noise levels with respect to your specific application requirements.
As the official drafter of national industry standards, and a "Industry Champion" recognized by the government, every TNSB is backed with the full rights of intellectual property, and dedicated custom electrical solutions. You will be sure to get perfect power protection from the TNSB 3-phase servo motor voltage regulator without the sacrifice of your already existing quiet space, whether it be for a hospital, recording studio or high-end hotel.
Call us to talk about your needs for low noise power protection, or to schedule a demonstration of the silent TNSB.