The Hidden Power Quality Problem

Power Quality Analysis and Consulting

 

Benefits of VSGR

1. Power Quality

2. Utilization Efficiency

3. Arc-Flash Safety

4. Minimize Fault Damage

5. Maximize Uptime

 

To learn more about how to improve your power system, please contact us. 

Louis J. Nemec | Louis@Nemecindustries.com

(770) 331-1393

vsgr

Voltage Stabilizing Ground Reference (VSGR)

The Phaseback VSGR uses electromagnetic induction to equalize phase voltages. This allows the VSGR to react to an imbalance in phase voltage at the speed of current flow. This has profound effects on arc-flash potential as well as harmonics. It also reduces motor vibration and increases power utilization efficiency because it keeps the phase voltages equal.

  • Reduces the potential for arc flash by over 85%.
  • INSTANTANEOUS, AUTOMATIC, RELIABLE PROTECTION

 

  • Corrects phase voltage imbalance

  • Mitigates the potential for arc flash

  • Prevents arcing ground faults

  • Eliminates voltage spikes from internal or external sources

  • Prevents phase loss due to high impedance grounds

  • Restores phase angle differential

  • Prevents phase voltage instability

  • Minimizes phase voltage harmonics

  • Corrects waveform distortion

  • Cleans up noisy ground reference and frequency instability

  • Increases operational efficiency

Manufacturer:  Applied Energy LLC - Saginaw, Michigan- USA
Model: Phaseback VSGR   Pat. No. 6,888,709
NEMA 3R enclosure is standard. Ground Fault Detector and Transient Counter is standard
Quotations and Ordering Specifications
Please provide the Transformer nameplate information
Authorized Agent: Nemec Industries LLC
(770) 331-1393  Louis@nemecindustries.com
  1. Transformer Capacity (Design kVA),
  2. Configuration (Delta, WYE, (solidly grounded, HRG, Open Delta, Hi-Leg).
  3. 3-Phase Voltage of secondary (side you want to protect)
  4. Amperage of Board or Bus
  5. Choose Breaker or Fused Disconnect. Internal or External
  6. Provide electrical drawings or one-line of power system

Contact Us For Power Quality & Arc-Flash Solutions

Power Quality Analyzers

Is there an industry-wide power quality problem?

hosted by Louis Nemec

I'd like to open a discussion concerning common power quality issues such as: arc-flash, harmonics, phase imbalance, transients, lightning, geomagnetic disturbances

Which of these issues pose real threats to our power systems and what can we do about it?

Here is my view on the topic - keeping in mind that my company, Nemec Industries, has a solution to this problem...

Power Quality may seem like a problem that has already been solved with filters and k-rated isolation transformers etc. This is the status quo. No one is really complaining. However there are drawbacks such as the increased cost of special rated equipment plus let's not forget that 100% neutral. Nonetheless, the conventional approach is acceptable and has been repeated throughout the land by the same folks for the past 40 years. Everything is fine.

Now take a look around the power industry. What do you see? I see a lot of relatively new equipment getting replaced. I have noticed that many pieces of equipment are not seeing their expected life. I believe there is evidence showing that many different types of modern electronic devices are seeing a higher than expected number of devices not reaching their expected service life. Equipment failure is either attributed to manufacturing defect, installation error,  a transient, system event, or  "act of god"

Let's take LED lights for example, they are meant to last 10-20 years. Yet it seems that one in every bunch won't last 2 years and few dont make it even 5 years. It is really a manufacturing defect? We are talking about reputable companies producing UL certified products that have gone through quality control and six sigma what have you. They are being sold at big box stores and by reputable electrical distributors.

If you don't think LEDs are a big deal, then just look at Variable Frequency Drives for example. VFDs are known to both cause harmonics and suffer from harmonics. We solve this problem by putting on a filter that either sucks energy away and robs efficiency or we use a filter that fails to filter out some of the harmonics and still lets an "acceptable" level of harmonics through. Surely we could do better. Meanwhile many plants are replacing drives, controls, motors, surge arrestors, UPS systems, inverters, chargers, and power supplies at a busy pace! Why is my four year old power equipment already fried? Why did we just spend $100K on a new VFD? And why do these brand new LED lights keep going out?

These devices all have what engineers call non-linear loads. They all use microprocessor controlled "switch-mode" or "fast-switching" power converters called thyristors. Fast-switching power components are found in VFD's, motor drives, in elevators, in the HVAC system, LED lighting, in wind turbines and solar systems and even our phone and laptop chargers.  These modern and efficient devices consume less power, but they are often very expensive to purcahse or replace. The trouble is they keep failing early because they are susceptible to harmonics - while they also cause harmonics themselves. Plus they are exposed to all of the other harmonics and transients from all of their neighboring circuits.  So it is the status quo that all of these expensive electronic devices are all slowly destroying each other. Not to mention some impending arc-flash and subsequent shutdown cost.

Furthermore this nuance is exacerbated by the standard wye config design. Today's facilities are further bombarded with ground noise because the neutral wire is grounded to the phase and the ground at the same point. There is no means of stabilizing the ground voltage. Result is all of the harmonics and voltage disturbances are induced sustained onto the entire ground grid. In a delta configuration, the ground grid sees much less voltage disturbance because it is not directly connected to any phase of the power system - however the grounded wye configuration is has been somewhat standardized because it allows for easier detection of faults and quicker triggering of breakers to interrupt fault currents.

Whether your system is delta or wye, we have a power quality solution that will improve your system unlike any other solution on the market. Our patented solution correct power quality issues head-on while also providing mitigation against the conditions that cause arc flash.

To understand how a device can prevent arc-flash, consider this: Arc flash is primarily caused by the sudden rise in voltage of the two non-faulting phases during a phase to ground fault. After the phase-to-ground fault has occurred, the faulting phase voltage drops as its becomes grounded in the fault. As a reaction to that voltage drop, the other two phase voltages rise quickly.

This effect increases the phase-to-phase voltages- while at the same time there is already and increased temperature because the phase-to-ground arcing is already underway. This situation causes the phase-to-phase arc flash which reaches very high temperature and thus causes the damage to personnel and equipment.