Electrical Engineering Articles & Guides
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CT and VT Selection Best Practices
Current transformer (CT) and voltage transformer (VT) selection begins with the connected function: revenue metering, indication, protection, control, disturbance recording, or a combination. From there, match system voltage…
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Selecting the Proper VFD
The proper variable frequency drive (VFD) is selected by matching the complete application—not simply the motor’s power rating. Start with the load’s torque–speed profile and operating cycle, then…
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Troubleshooting Voltage Sags and Swells
Voltage sags and swells are best troubleshot as timed system events, not as isolated voltage readings. First verify that an event occurred with a suitable power-quality instrument. Then…