Atec All-Test-IV-Pro - Manual (Page 2)

Predictive Maintenance
Regular testing can identify developing faults before a failure occurs. All measurement data
can be trended for predictive maintenance condition monitoring. By making proactive repairs
and eliminating unscheduled down-time, plant productivity is greatly improved.
Application Story:
A drive failure on a critical 200 HP motor was traced to poor connections using MCA. MCA
was performed on 10 similar machines. Five of the machines indicated poorly crimped
connections at the motor terminals. These connections would have deteriorated to the point
of failure within weeks. Pro-active repairs were performed, cost avoidance of this “find” was
over $500,000.
Quality Assurance
New motors of any size can be defective. Spares “on the shelf” are often unknowns.
A 2-minute test can insure that your motor will run once you install it!
• Test new and spare motors before installing (be sure they are good, plus you have
a baseline for future comparison)
• Test motors before you put them on the shelf as spares
• Test failed motors before and after repairs (make sure you don’t have
a $900 paint job!)
Application Story:
A power plant performed a routine test on a new 50 HP motor about to be installed as a
back-up bearing coolant pump. A significant phase unbalance was detected, the motor was
not installed.
Further evaluation revealed that motor was a new design, the unbalance was a
manufacturing defect. Had the motor been installed as the backup and been called into
service, it would have tripped and failed within minutes. Potential costs would have been in
excess of $1 Million.
Troubleshooting
If the motor system quits running, the ALL-TEST IV PRO ™ evaluates the connections, cable
and motor right from the starter, VFD, or disconnect. Takes the guess-work out of determining
if you have a Mechanical or Electrical problem.
Application story:
A 300 HP motor was drawing significantly unbalanced current. Motor Circuit Analysis was
performed at the MCC indicating no problems with the motor, cables, or connections.
Examination of other components in the circuit identified a blown power factor correction
capacitor (The ALL-TEST IV PRO ™ also tests capacitors). The capacitor was much easier
and less expensive to replace than the motor. Without the ALL-TEST PRO ® , this plant would
have replaced the motor, only to find the problem was not solved.
How much money would this save in your plant?
The ALL-TEST IV PRO
™
finds the faults you can’t see with any
other hand-held instrument.
• Turn-to-turn, coil-to-coil, and phase-to-phase faults
• Open phases
• Burned or contaminated windings
• Poor connections
• Broken/cracked rotor bars and rotor casting voids
• Rotor eccentricity
• Grounded windings
• Cable faults
Motor Circuit Analysis Applications with The ALL-TEST IV PRO
™
Testing spare motors to confirm their status insures
against installing a faulty motor.
Portable and easy to use, the ALL-TEST IV PRO ® is
right at home on the plant floor. No need for a cart when
you’re testing motors!