Call Us:800-580-5588

Purvis Industries


Posted on Thursday Jul 09, 2020 at 04:07PM in Electrical

Read More

VFD Stopping Techniques

Posted on Tuesday Jan 29, 2019 at 06:12PM in Electrical

Read More

Let's Start Something

Posted on Friday Jan 04, 2019 at 02:54PM in Electrical

Read More


Posted on Tuesday Dec 04, 2018 at 04:13AM in Electrical

Read More


Posted on Thursday Jul 26, 2018 at 02:39PM in Electrical

          Many of our customers have the need for electric motor braking whether they know it or not. Most of them are unaware of the potential time and energy savings they could receive from electric motor braking.

          Once it has been determined braking is required there are several things that need to be known. The first thing that must be known is the weight and speed of the rotating load, next is how fast that load needs to be stopped and lastly how frequently this load needs to be stopped. Once these factors are known it can be determined if the VFD drive can stop the load on its own or if additional items are required. In the event the VFD drive needs additional items to stop the load you might need to add a braking resistor and or the brake chopper option to the VFD drives order code. On some occasions you will need to add an external brake module to a VFD drive that doesn’t have the option for a brake chopper. These items are used together to dissipate the excess energy that is created when stopping a rotating load.

Read More


Posted on Thursday Jun 14, 2018 at 01:19PM in Electrical

Article Submitted By: Robert Witte

ABB PSTX Soft Starters

        When ABB first released their new PSTX Soft Starter, they were only available up to 370 amps (300 Hp @ 480v) but they have now released the full product line up to 1250 amps (1000 Hp  @ 480v). Previously, all ABB Soft Starters were a part of the ABB Low Voltage Products Group, along with products like Circuit Breakers, Across the Line Starters, Disconnect Switches, Pilot Devices, etc. Recently the Soft Starter product line has been re-aligned into the ABB Low Voltage Drives Group. 


The PSTX Soft Starters are the most feature rich Soft Starters on the market today. The detachable keypad is modeled after the current ABB Drives keypad, such as the ACS880, ACS580 and soon to be released ACS480. Navigating through the keypad to program the Soft Starter parameters has the same flow as the current ABB drives, making programming very easy, even without using the manual for assistance. This user-friendly keypad is standard on all PSTX Softs Starters.

  The PSTX Soft Starters offer a Slow Speed Jog Function, in both Forward and Reverse Directions. This feature allows for greater flexibility when operating equipment such as Conveyor Belts and Cranes. This feature provides positioning capabilities, allowing the operator to take greater control of their process.


Read More