Shaft Voltage Test Kit
Conductive Microfiber™ Probe for use with Fluke® 190 Series II ScopeMeters
Is your motor safe from destructive shaft voltages? For the first time you can easily and more accurately measure the voltage on a rotating shaft. The AEGIS® SVP Shaft Voltage Test Kit's unique design of high density conductive microfibers™ ensures continuous contact with the rotating shaft. Used with the Fluke ScopeMeter, you can determine if your motor is subject to potentially damaging bearing currents. The AEGIS® SVP may be hand held or used with a magnetic base. Simply contact the rotating shaft with the microfibers™ and evaluate the voltage waveform on the oscilloscope.
Electrical Bearing Damage: Capacitive coupling between windings and rotor can create voltage on a motor's shaft — voltage that can discharge through bearings, damaging them and shortening motor life. For motors controlled by variable frequency drives, however, these voltages can be as high as 10-40 volt peak. At these higher levels, voltages can easily cause electric discharge machining (EDM) effect in the motor bearings, causing pitting, fusion craters, and fluting, which eventually lead to premature bearing and motor failure.
Until now, there was no convenient way to determine whether a motor was at risk for such bearing damage. By the time bearings began to make noise, the damage was done.
Detect and Prevent Motor Failure: Now, with the AEGIS® SVP Shaft Voltage Test Kit and an oscilloscope, plant maintenance personnel can take readings from motor shafts quickly and easily — readings that confirm or deny the presence of shaft currents that can damage motor bearings.
Note: For motors powered off the line by sine wave AC power, these voltages are typically 100-200 millivolts at 60/50 Hz and will not cause problems with electrical bearing discharges.
The following equipment is required to test for damaging shaft currents:
- AEGIS® SVP: A specially-designed shaft voltage probe extends an operator's reach and contacts the motor shaft by means of a conductive microfiber™ brush, making the process of taking shaft voltage readings safer and easier.
- Oscilloscope: An oscilloscope with a high bandwidth (up to 200 MHz) and fast sampling rate (up to 2.5 gigasamples/second) such as the Fluke 190 Series II ScopeMeter®.
This training module will guide you through some of the basic functions of Testing Shaft Voltages using the Fluke ScopeMeter. This presentation includes:
- Why Test for Shaft Voltages
- Recommended Testing Equipment
- Installing the AEGIS® SVP Tip
- Setting the ScopeMeter Parameters
- Examples of Shaft Voltage Readings
AEGIS® SVP Shaft Voltage Probe
Available for the probe styles listed below. If your style probe is not listed, please call Customer Service at 1-866-738-1857 or email firstname.lastname@example.org
3 SVP Tips, probe holder with two-piece extension rod (total length of probe holder with extension rod is 18 inches), magnetic base, and Grounding Simulator.
3 SVP Tips, probe holder with two-piece extension rod (total length of probe holder with extension rod is 18 inches), and Grounding Simulator.
3 SVP replacement Tips.
For complete installation and testing training see Voltage Testing Training Module
Where to buy AEGIS®: AEGIS® SVP Shaft Voltage Probe Kits and Tips are available through our distribution channels. Please visit the "Where to Buy" section of our website to find a distributor near you.
To buy or learn more about Fluke ScopeMeter portable oscilloscopes visit the Fluke website.
To rent portable oscilloscopes visit TestEquity.