Improve Electro-Mechanical Reliability Using ESA
Figure 1. Common motor faults (CF=Center frequency, RS = Running Speed, LF=Line Frequency) Electrical Signature Analysis (ESA) is a predictive maintenance (PdM) technology that uses the motor’s supply voltage and operating current to identify existing and developing faults in the entire motor system. These measurements act as transducers [...]
Rotor Bar Fault Maintenance Issue: Vibration Sensor Alert
A 398 KW MV motor that runs a blower fan in a cement plant was showing strange behavior. The vibration equipment indicated vibration amplitudes that became chronic with the passage of time. The maintenance team not knowing what the issue was, ran the motor until the bearings [...]
Motor Current Signature Analysis on DC Motor
Introduction Evaluation of a 10 HP, 1.0 SF, Ins F, 1750 RPM, 240 V, 33 Amp armature, 240 V, 1.23 Amp field, DC electric motor from the output of the DC Drive. A DC Drive fault and poor brush condition were indicated. Discussion When testing a DC electric motor with [...]
Eliminate Voltage Unbalance
Voltage unbalance degrades the performance and shortens the life of a three-phase motor. Voltage unbalance at the motor terminals can cause current unbalance that is far out of proportion to the voltage unbalance. Unbalanced currents lead to torque pulsations, increased vibrations and mechanical stresses, increased losses resulting [...]
Pulse Width Modulated Motor Drive Fault Detection Using Electrical Signature Analysis
Industry’s use of Motor Drives for AC motors continues to grow and the Pulse-Width Modulated drive (PWM) has become the common industry standard for low to medium horsepower applications. As with the other components within the motor system, the PWM drive has different failure modes and for [...]
Motor Circuit Analysis for Energy, Reliability and Production Cost Improvements
Introduction With news reports quoting power brown-outs due to increased electric demand, methods for controlling energy costs are no longer a green option, but more of a survival strategy. Within industry, the number one potential for energy control is through electric motor system energy strategies. Electric motor systems use [...]
Machine Monitoring and How ESA Technology Can Upgrade Your Plant’s Reliability
By: William Kruger, ALL-TEST Pro More than 300 million electric motors are used in infrastructure, large buildings, and industry globally. These motors account for about 2/3rds of the industrial power consumption. Electricity is required in almost all areas of the plant to provide the driving force that either [...]
Reducing Costs with ESA and MCA™ Technology
Managing Rotating Equipment More than 300 million electric motors are used in infrastructure, large buildings, and industry globally. These motors account for about 2/3rds of the industrial power consumption. Electricity is required in almost all areas of the plant to provide the driving force that either operates [...]
How to Completely Test 3-Phase AC Induction Motors Using Deenergized Motor Testing
People often conduct motor inductance testing with methods that don’t accurately assess the whole picture. Inadequate testing can lead to premature equipment replacement, poor cost analyses and other negative outcomes. Deenergized motor testing with ALL-TEST Pro’s proprietary Motor Circuit Analysis (MCA™) devices can make testing more accurate, [...]
VFD Motor Bearing Failure: Motor Fault or VFD Issue?
Improvements in Variable Frequency Drive (VFD) technology have resulted in lower costs, improved reliability, and more importantly increased use. Most modern VFD system have internal diagnostics that create automatic shutdown on faults. However, the cause of these faults can sometimes be elusive to locate and correct. However [...]
Motor Acceptance Testing
Motor acceptance testing is a critical part of many preventive maintenance programs and can be key to catching electrical problems before they cause considerable downtime. With more than 35 years of motor testing experience ALL TEST PRO® has determined that 25 to 30% of new or newly [...]
Improving Electrical Reliability by Implementing Motor Circuit Analysis
When you want to determine the health of your motor, Motor Circuit Analysis (MCA™) is a preferred choice in any industry. This deenergized motor testing method allows you to gauge the entire health of your motor, transformer, generator, and other coil-based equipment in just a few minutes. [...]