Reduced Downtime and Major Energy Savings

With a Roto-Armor drive, you might never have to shut down your progressive-cavity pump again. When well fillage is low, Roto-Armor lets you slow the pump until the reservoir refills instead of shutting down completely.

Reduce Wear; Reduce Energy Cost

The drive features a machine-learning mode that will run the pump at the optimal speed for each well’s inflow rate to maximize your production.

It’s so effective, we have customers that have eliminated backspin at pump off or gas shot interference. In most cases, this will extend the life of the equipment, while increasing your production—creating the maximum return on your investment. What’s more, there are no costly sensors to install on the unit that can be damaged, rendering the unit inoperable.

The Roto-Armor VFD has highly accurate motor control to carefully regulate applied motor torque, eliminating torque overshoot and its associated problems. We can reduce belt, rotor and rod string breakage from excess torque, saving service costs and increasing production. With near unity power factor, elimination of in-rush currents and associated peak demand charges, and a reduction of utility kwh usage, installing the Roto-Armor VFD means payback is quick. 

Built-in production calculations assist in evaluating wells. The Roto-Armor is also available in single phase input, eliminating the need for costly, problematic phase converters and the associated over-sizing of components or motors. Additionally, those traditional methods cost you more on your O&M budget dollars due to their high electrical losses.

Factor in precision speed control over the pumping process, and you also create the opportunity for increased production.


Input Voltage

208V, 230V,
480V +10/-20%

Well Optix SCADA Interface


Common I/O platform throughout all HP ranges


Transient voltage surge protection and 3% input line reactor


NEMA type 3R outdoor rated enclosures with sun shields, exhaust heat plenum


Extreme climate rating from arctic to desert conditions

-40°F to 122°F

WiseGuy data capture, trending, time and date stamp, history, USB port for download


Interchangeable and expandable I/O cards


Communications: ModBus RTU, Ethernet and others


Open Protocols for your SCADA system and telemetry ready


IEEE519 compliant low harmonic options


Proven, tested products with over 10,000 units


WiseGuy: The easiest, most detailed VFD interface available

Smart. Intuitive. Easy. That’s what customers are saying about the WiseGuy operator interface that comes on Roto-Armor series drive packages. If you know industry terminology like “Pump Run Time,” “Motor Current” or “VFD Output Voltage,” then you can operate the drive. It’s just that easy.

Knowledge is power in the hands of your pumpers and the WiseGuy gives you live trending, history, date & time stamp, data logging, single touch USB downloads, and much more in the industry’s easiest-to-use, smart and intuitive drive package. Using the WiseGuy, the most recent 30-day production history and up to the last 97 pump off events are graphically viewable and downloadable.

Service is always a standard feature

Service is always a standard feature

The oilfield is a difficult, often brutal place, especially for submersible applications. But we understand the pressure to keep your pumps running, no matter the conditions. Our drives are engineered and built to run through the extremes of heat and cold, through dust and dirt. That said, we realize that in the oilfield everything is susceptible to break, sooner or later. If one of our drives goes down, our technical team is available 24/7.

We will have you back up and running in hours, not weeks. As one of our clients said: “In the oilfield, there is no tomorrow. Only today.”

That is the belief we live by.

We also have the most comprehensive extended warranty in the entire industry — DriveShield. With this industry-first warranty, you are protected at all times. Who else offers 6 years of protection, even against lightning strikes?

Our low-harmonic drives keep you running reliably, efficiently and in compliance

Harmonic drive compliance becomes more critical every day. At SPOC, we focus on the entire system, providing low-harmonic drives to ensure that you continue running reliably, efficiently and in compliance of IEEE519 and EN-6100-3-2.

We manufacture every type of low harmonics drive, using the latest technology available.  Everything we do is tailored to your needs.

In general, we recommend the Active Front End VFD  for minimizing harmonics in fields incorporating variable speed drives. This technology is electronically based, not magnetically based. It meets the IEEE519 under every scenario and all loading conditions, regardless of voltage imbalance or source impedance. It is so advanced it can actually correct for low-voltage conditions from marginal systems and correct power factor within the electrical system, saving you money. You can read more about our harmonics solutions here.

Our low-harmonic drives keep you running reliably, efficiently and in compliance