PHASEBACK

VOLTAGE STABILIZING GROUND REFERENCE SYSTEM

Phaseback is a revolutionary Voltage Stabilizing Ground Reference (VSGR) device that serves as a surge suppressor, voltage regulator, and harmonic filter, without the need for metal oxide varistors (MOVs).

 

The VSGR is the world’s only energy-savingenergy-efficientfuture-proofharmonic noise eliminatingground fault/arc flash preventinglightning arrestingEMP mitigatingvoltage stabilizing system. If Phaseback isn’t already installed where you work, ask your manager: Why not?

 

The patented VSGR applies instant corrections to any phase that is out of balance, and protects against power surges of any magnitude in all power systems up to 230KV.

With 15 years of continuous, fault-free operation in numerous applications, Applied Energy proudly presents the following offer (U.S. only): If it is determined that Phaseback VSGR has not solved the power quality problems you’ve described to us, simply return the unit, and we will cancel the invoice, minus the round trip freight charges.

Additionally, all Phaseback products are backed by a lifetime warranty.

Applied Energy LLC is committed to proving ourselves as the only true power quality solution. All Applied Energy products are designed to enable proper utilization of power for our clients. Contact us to find out how we can help you.

PHASEBACK OFF

PHASEBACK ON

Instantaneous, automatic, reliable protection

The VSGR prevents transient voltages, such as those generated by switching transients or phase faults.

Additionally, it uses electromagnetic interaction of mutual induction to control voltages, protecting devices and preserving components against degradation that occurs over time, or through frequent and heavy usage.

By use of electromagnetism, the VSGR reacts instantly to a phase voltage imbalance at the speed of current flow. The VSGR redirects energy from the phase with the higher voltages, feeding it back to the low voltage phase. This process uses heavy-duty, closely coupled, industrial grade inductive devices for high efficiency and continuous duty in wet, dirty, or harsh environments. The VSGR is designed for high tolerance against severe shock and vibration.

WHAT PHASEBACK DOES

The Phaseback VSGR balances and stabilizes phase voltages with respect to ground. This phase correction allows motors, drives, and control systems to operate more reliably. The VSGR also maintains the ground reference in the event of a power failure or scheduled shutdown, preventing damage to sensitive equipment.

ELIMINATE TRANSIENT & ARC FAULT DAMAGE

Transient voltages and arcing ground-faults cause high frequency noise, insulation breakdown, control lockups, and premature equipment failure. Most solid grounds, which may lead to an arc flash hazard, start as arcing ground faults.

The VSGR prevents arcing ground faults, reducing the potential for arc flash by over 85%. Even in the event of a power outage, the VSGR discharges the stored energy from the power distribution, reducing the potential for an arc flash event.

The VSGR is suitable for both ungrounded and grounded systems up to 230KV, and is unaffected by power surges of all sizes, as well as noise outside its operational parameters.

HARMONIC NOISE MITIGATION

Phase voltage harmonics cause eddy currents, which cause heat in motors, transformers, and all other inductive devices. The VSGR instantly and permanently reduces all harmonics, including zero, even, odd and inter-harmonics, by 85%.

THE SQUARE LAW FACTOR

The VSGR reduces harmonic frequencies by the square law factor. The 3rd harmonic is filtered 9 times, the 5th harmonic is filtered 25 times, and the 7th harmonic is filtered 49 times the typical loss of 60Hz noise. This typically reduces all harmonics 50% to 85% from the 2nd harmonic through the 56,000,000th harmonic of 60Hz.

Unlike other types of inline filters designed for smoothing the current in just one or two harmonics, the VSGR reduces harmonic noise by beating it against itself, which results in a reduction of all harmonics.

In the field, the VSGR has eliminated harmonic frequencies exceeding 3.6 GHz, the equivalent of an EMP.

The VSGR reduces power consumption, extends motor life, protects against transients, and eliminates damaging harmonics unlike anything else on the market.

HOW PHASEBACK WORKS

The Phaseback VSGR operates on the principle of electromagnetism. This allows the VSGR to react to an imbalance in phase voltage at the speed of current flow. 

The  electronic components found in today’s control systems becoming smaller and faster have made adherence to the magnitude and duration of the power disturbance considerations found in the CBEMA Curve and its successor, the ITIC Curve, even more critical.

Ungrounded power system applications require special consideration because there is no safe way to ground a power system without inducing current, thus violating the National Electric Code (NEC) which states “ground is not to be an intentional current-carrying conductor”.

It is dangerous to allow current to flow to ground when intermittent faults, transient overvoltage, and short circuits can potentially create a dangerous condition for personnel. The issue then becomes how to provide a ground reference necessary for control systems to properly operate without installing products that allow current to flow to ground, which could cause safety concerns and, should two phases connect to ground, a possible arc flash.

HOW PHASEBACK WORKS

The VSGR addresses the following:

1) Arc Flash Mitigation
2) Arcing ground-faults
3) Voltage spikes from internal or external sources
4) Phase voltage imbalance
5) Phase Loss due to high impedance grounds
6) Phase angle differential
7) Phase voltage instability
8) Phase voltage harmonics
9) Waveform distortion
10) Noisy ground reference and frequency instability
11) Operational efficiency increases

To understand the operation of the Phaseback VSGR, the following explanation is necessary: Ohm’s Law for AC circuits states that Voltage equals Current multiplied by Ohms of Impedance, and, as the leading event, the voltage change offers the fastest reaction time when detected.

The VSGR operates similar to a braking resistor, dissipating
the charge current in the power system through the resistor in the series secondary circuit to lower the capacitive energy to a non-damaging level, thus mitigating the arc flash potential.

The series circuits in the VSGR have the same current through the entire circuit; circuits with equal ohms of impedance and equal current will maintain equal voltage.

The transformers couple the primary and secondary circuits with magnetic lines of force. The secondary current of each transformer controls the primary current of that transformer and the voltage ratio is equal to the turns ratio in the transformer; the current ratio is at the inverse of the voltage ratio in the transformer.

Phaseback VSGR makes a three-phase wye connected transformer from (3) single-phase transformers. The center-tap or neutral of a wye-connected primary is connected to ground and the ungrounded single-phase secondary coils are connected in series with a large power resistor connected in series with those secondary coils.

HOW PHASEBACK VSGR WORKS

The large power resistor limits current to protect the transformers from overload, and the current through and voltage across the resistor are in-phase
(100% power factor). Harmonics are reduced and filtered through the resistor in the secondary as current circulates. The transformers are identical with equal secondary voltages and equal primary voltages. They are bi-directional, step-down and step-up, and the phase voltages across each primary coil are equal when the power system is balanced, and cause the secondary voltages in the VSGR to be equal.

During an imbalance on the power distribution system, energy from the secondary is sent back to the low voltage primary phase, and the positive feedback keeps the capacitive charge equal, causing the phase voltages on the power system to become stable.

Included in the Phaseback VSGR are two alarm points. The first point is located on the front of the panel; it is a ground fault indicating light. The second point is a secondary series circuit current detector with solid state (normally open) contacts that is factory set to alarm when 500 milliamps flow through the resistor. The early warning of the current detector provides maintenance the ability to correct the problem before a second fault forms, which can prevent multiple phases faulting through ground. This is a prime cause of arc flash.

For marine applications, we also recommend connecting a second current detector on the ground connection. This current detector is connected to the neutral point of the primary connection in the unit for protection in the event that the ground cable is cut or otherwise disconnected.

Spare part recommendations for the unit are minimal, with the only recommendation being a couple of additional GE755 light bulbs and an additional current detector.

Based on MTBF calculations shown below, the Phaseback VSGR should operate for decades without problems.

INSULATION “HALF LIFE”

“Half-life” is a new word in our vocabulary and relates to the fact that for every 8 to 10 degree C increase in insulation temperature, its useful life will be cut in two. The original rule of thumb was 8 degrees, but in recent years technical writing generally refer to 10 degrees.

The transformers used in the VSGR have an insulation temperature rating of 180 degrees Celsius.

Typical operating temperature under 100 degrees Celsius extends its operational life to over 294 years. For every 10 degrees Celsius below rated temperature electrical equipment operates at, its projected lifespan doubles.

This is a realistic life expectancy of the transformers used in each marine Phaseback. The resistor is rated for a continuous operating temperature of 375 degrees Celsius. Operating below 100 degrees Celsius extends its life to excess of 275 years.

Taken from Square-D Dry Type Transformer Study Course (Bulletin I-1 (R1) 10M BP 4/91) Page 26.

WHAT PHASEBACK VSGR HAS DONE FOR OUR CLIENTS

The VSGR is the only surge protective device that can withstand the most powerful surges without damage to itself or anything it protects.

The laws of physics do not change, but our understanding of them does. The VSGR works on a fundamental electromagnetic principle that reacts at the speed of current flow, is shock proof, vibration proof, and is built to withstand the harshest environmental conditions.

The VSGR has a lifetime warranty, and has proved itself in the market for the past 15 years. Used by industries, factories, and the military, the VSGR has saved billions of dollars worth of equipment, and has even saved lives. 

PHASEBACK VSGR PREVENTS ARC FLASH CAUSED BY GROUND FAULTS

According to the IEEE, the vast majority of phase-to-phase fault through ground start as phase-to-ground faults or flashover due to insulation breakdown. Before Phaseback VSGR, a phase-to-ground fault or flashover would inevitably result in an arc flash event.

The graph pictured at left depicts a phase-to-ground fault which led to a phase-to-phase fault. No arc flash occurred. Phaseback VSGR mitigated the arc flash condition!

KEMA ARC FLASH TEST

On January 13th 2017, the resilience of the Phaseback VSGR against arc flash events was put to the test at the KEMA high-voltage laboratory in Pennsylvania. A battery of arc flash tests were performed against the VSGR.

The result: no damaged equipment, no arc flash, and no hazardous rise in voltage.

Shown in the graph depicted below, the VSGR mitigated a voltage spike of 6,000V to 12V. In doing so, the VSGR consumed 0.25 amperes of current. 

For more information, see the full KEMA Arc Flash Test Report (PDF), as well as the KEMA Arc Flash Test with Phaseback VSGR Video (YouTube).

 Testimonials

A western Michigan Foundry was burning out fuses to the furnaces. After applying the Applied Energy solution, no more premature fuse losses have been experienced, eliminating downtime and product losses.

-Foundry Facility, Michigan-

A manufacturer of Acoustic and Fire-Resistant materials in Indiana was experiencing the loss of at least one Variable Frequency Drive each month. With the Applied Energy solution added the facility has experienced zero losses since implementation saving equipment cost and downtime.

-Acoustic, Fire-Resistant Materials Manufacturing Plant, Indiana-

A plastic container plant for the food industry was experiencing the loss of the printer UV drying light after between 600 and 1000 hours of operation. Each of the lights cost six hundred dollars. After the Applied Energy solution, the last time the lights were replaced was after 3500 hours.

-Plastics Manufacturing Plant, Michigan-