“After applying the Phaseback solution, the built-in ground fault detector showed that within one month of installation, Phaseback had already prevented 96 transient events.
Thanks to Phaseback, equipment failures in this facility due to transient surges are nothing more than a distant memory.”
“A leaky roof and a Buss Plug do not mix.
Usually when this would happen it would take days to identify the damaged components and replace them if the parts were available.
No more, with Phaseback the Buss Plug was replaced, the breaker closed and every machine started back up. No scrambled programs and not one circuit board damaged.”
“Mr Princinsky,
I’m writing you to let you know how well the Phaseback protection device worked for us.
Loyola experienced losses from electrical spikes on our pool disinfection system in July of 2014. Preston Cobb of Borg Sales, whom I have known for about 9 years, happened to be here and suggested we install a Phaseback unit on this electrical system. A Phaseback was installed and we have not experienced any repeat failures since.
Over the years we have lost a lot of equipment due to lightning strikes and/or electrical issues with Com Ed. In September of 2015 we came into work on a Monday after a large storm to find a lot of equipment that had failed due to being single phased. Com Ed had lost one of the incoming phases, single phasing our three services. The end cost of this failure was over $100,000.00 for the two services that were unprotected. The system that was protected by the Phaseback did not lose even a fuse. I was skeptical at first but since Preston has never steered me wrong in the past, I thought about it and had nothing to lose going forward. Which I’m glad I did. We are going to buy at least two more in the future for our presently unprotected services.
Thanks again “
“Aboard the Global 1200,
At 10:30AM this morning, off the coast of Venezuela, the 12,000-ton, 2,500kW crane VSD developed a ground fault while in operation.
The VSGR at the 5,500kVA switchboard, source for the crane, alarmed indicating a ground fault. When the magnitude increased, the VSGR opened the two, 2,000A crane input breakers. The ship sustained no damage.
Our design worked just fine!
Regards all,”
“Dan,
Here is a quick synopsis of my recent job using Phaseback solutions to restore system balance and provide arc-flash prevention.
The site is a commercial maritime vessel used in the off-shore industry. It is heavily dependent on ungrounded voltage systems for service continuity. You can consider this a true, “No-Break” system, which means these voltage systems MUST tolerate phase grounds without danger to personnel, AND WITHOUT allowing loss of control system authority due to the inherent danger to operating equipment and operating personnel. Two arc-flash events occurred recently while electrical workers were in the process of operating large circuit breakers. In each incident, the same breaker failed explosively, initiating the events. Several workers were injured, one seriously.
A total of four Phaseback units were purchased and installed; two on 690v systems and two on 480v systems. The Principle project electrical engineer (from Europe) enthusiastically endorsed my selection, agreeing that if the unit will stabilize the system voltages, then arc-flash events cannot occur. We proved this by installing one 690v unit, and then forcing a ground on one phase. The grounded phase voltage only dropped 2 volts! At this point, four more Phaseback units were purchased for a second vessel of the same design.
A large part of this task was to demonstrate to the ship crew that it was now safe to operate the equipment. The demonstration of Phaseback capabilities did this.
During the remainder of this job, Phaseback saved us two additional times. A large, 2.5MVA VSD system twice suffered catastrophic failure and subsequent grounding of a DC link snubber resistor (375kW). When this happened, since the VSD is powered from the 690v system, the DC went to the ship’s hull and we believe this was the cause of the earlier arc-flashes. The Phaseback was damaged in these events, but was repaired, and credited with preventing possibly major damage to the equipment and injury to personnel.
Thanks, and you have a great product!”
“Mike…
I find myself continually bewildered as to way folks in the Naval electrical community keep missing the concept of what Applied Energy’s Phaseback Unit is all about. Individuals seem to think of Phaseback as a reactive device similar to a surge suppressor [which it’s not], vs. an active device similar to an instantaneous regulator [which it is].
It would appear that many folks seem to think of Phaseback as a high-resistance grounding device [which it is not].
Being the active regulating device that it is [for true Delta configured power supplies], gives cause for the reason Phaseback is able to control hundreds of amperes of fault and imbalanced current [within the Delta connected Phase windings] via a #10 AWG ground reference conductor.
The end result of Phaseback being able to control these high currents within the Delta connected Phase windings has the net effect of controlling damaging voltage transients being applied to both equipment and ground.
At Kodiak, we’ve had one such Delta-Delta/ Phaseback system set up as an isolated power supply. It’s been in use for approximately one year at one of transmitter/ communication facilities with flawless results.
As I’ve mentioned before, we at Kodiak have also acquired two additional
Phaseback Units to be incorporated into our Cutters electrical shoretie services. Once installed, we’re hoping to have independent testing performed for the Pier’s grounding system as well as identifying benefits/ impacts of installed Phaseback Units.
With the limited extra time I have available, if I can be of some assistance
in trying to let others within the Naval community know the potential benefits of Delta-Delta/ Phaseback power supplies, let me know and I’ll try and help as time permits.
Best regards… ALB
PS…It needs to be noted that standard ground-detection-lamp systems will not sense the #10-AWG ground reference conductor of a Phase-Back Unit.
However, some of the newer electronic ground detection monitors will under certain conditions. So appropriate electronic ground detection monitors must be selected when utilizing Phaseback Units.”