Voltage Sag Test Equipment -
The Porto-Sag

Since 1994, EPRI's Porto-Sag line of voltage sag generators have developed a proven reputation to be more versatile and user friendly than any other brands on the market. Our 200 Amp units have been in production since September 2001.

• SemiF47 Compliance Testing (PQ Star)
• Consulting
• Training
• Onsite Testing
• Lab Bench Testing
• Onsite Power Quality Audit
• Sag Generator Product Line

Utilizing up to three transformers, our units can create voltage sags that model "real life" events, not just test to a given standard. This is important when you want to make sure your equipment can ride-through voltage sags that have been recorded in past events. Unlike other units, the Porto-Sag allows the user to record and view the voltage sag data immediately. We are now shipping a Bi-Mode and Tri-Mode option for our standard 200A product.

Test Vector Summary for Porto-Sag Model  PS-200-3P-T and Options
Test Vector Types	Model	Voltage Sag Test Vectors	Resolution	Maximum Voltage	Swell
	Base Model	A, D, E, F	5% steps	277V L-N 480V L-L Requires Neutral	Up to 125%
	Bi-Mode Option -WW	A,B,D,E,F	5% steps	277V L-N 480V L-L Neutral Not Required	Up to 125%
	Tri-Mode Option -TM	A,B,C,D,E,F	10% steps for Method C 5% steps for all Other Methods	277V L-N 480V L-L Neutral Not Required	Up to 120% for Method C Up to 125% for all Other Methods

 Typical Specifications for Porto-Sag Model  PS-200-3P-T

The Porto-Sag is controlled through customized software, enabling the unit to inject voltage sags while simultaneously recording up to 16 channels of feedback information through the onboard data acquisition system.

Features

Screen Snapshots
(Click images to see larger snapshot)

The Porto-Sag simplifies voltage sag testing by integrating the sag generator hardware and data acquisition software into one package.  Key features include:

• Versatile control of voltage sag magnitude.  Sag magnitudes are continuously variable between 0% and 100% of nominal voltage.  Three phases are independently variable, allowing unbalanced sags.
• Can be used for testing single-, two-, and three-phase loads.
• Flexible voltage sag durations ranging from one quarter (¼) cycle to 3 seconds in one quarter (¼) cycle increments.
• Solid-state switching allows 1 degree point-on-wave control from 0 to 359 degrees.
• Voltage sag waveforms can be saved in multiple formats for easy reporting.  Available formats include text, bitmap, and metafile.
• Universal input control power (100 to 264Vac, 50 or 60Hz).
• Includes emergency off safety circuit for removing power to the connected load.
• Built-in current transformers to monitor three-phase load current.
• Software runs under Microsoft Windows 95, 98, ME, XP, 2000 and NT.

• Meets testing requirements for IEC 61000-4-11, SEMI F42/F47 and the Revised SEMI F47 (SEMI F47-0706)