Use an ohmmeter to check resistance value.![Electric motor drive installation and troubleshooting answer key tool Electric motor drive installation and troubleshooting answer key tool](https://www.licensedelectrician.com/Store/AT/Images/1789-90.jpg)
- Electric Motor Drive Installation And Troubleshooting Answer Key Replacement
- Electric Motor Drive Installation And Troubleshooting Answer Key
- Electric Motor Drive Installation And Troubleshooting Answer Key Code
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Properly installed and maintained Lincoln Electric polyphase AC induction motors operated within the nameplate ratings will run trouble-free for many years. Problems and premature failures often indicate input power system troubles, poor or deteriorating mechanical installations, or malfunctions in the driven machinery.
Electric Motor Drive Installation And Troubleshooting Answer Key Replacement
With an ohmmeter set to the Resistance or Ohms test setting, place test probes into the appropriate jacks, usually the 'Common' and 'Ohms' jacks. (Check the meter's operation manual if necessary) Choose the highest scale (R X 1000 or similar) and zero the meter by touching both probes against each other. Adjust the needle to 0 if possible. Locate a ground screw (often a green, hex head type) or any metal part of the frame (scrape away paint if needed to make good contact with metal) and press a test probe to this spot and the other test probe to each of the motor leads, one at a time. Ideally, the meter should barely move off the highest resistance indication. Make sure your hands are not touching the metal probe tips, as doing so will cause the reading to be inaccurate.[6]Electric Motor Drive Installation And Troubleshooting Answer Key
![Electric motor drive installation and troubleshooting answer key tool Electric motor drive installation and troubleshooting answer key tool](https://www.licensedelectrician.com/Store/AT/Images/1789-90.jpg)
Electric Motor Drive Installation And Troubleshooting Answer Key Code
- It may move a fair amount, but the meter should always indicate a resistance value in the millions of ohms (or 'megohms'). Occasionally, values as low as several hundred thousand ohms (500,000 or so), *may* be acceptable, but a higher number is more desirable.
- Many digital meters do not offer the ability to zero, so skip the 'zeroing' information above if yours is a digital meter.