Medium voltage drives and synchronous transfer control

Variable frequency drives provide the greatest level of control for starting, running, and stopping motors. In this video we discuss Eaton’s SC9000 medium-voltage drive and how it can control multiple motors when engineered with our synchronous transfer system.
We also educate on what a variable frequency drive is, what qualifies as a medium-voltage drive, and how the power equation affects their efficiency.
Other topics we cover:
- Safety - Design options that increase the safety of operators and the equipment
- Harmonics - At the Power Systems Experience Center, we demonstrate how Eaton’s medium-voltage drive solution that can mitigate harmonics and reduce inrush current
- Footprint - Designs to maximize footprint, for example integrated motor control and protection with common bus
- Reliability - Solutions that increase reliability, such as cooling system, encapsulated power poles, and high mean time between failures (MTBF)
Finally, we illustrate various scenarios in which a sync-transfer would be beneficial.
Visit our Eaton site for various medium-voltage motor control systems:
www.eaton.com/us/en-us/produc...
Learn about other electrical power systems, check out our videos on:
- Medium voltage (MV) switchgear: • Medium-voltage (MV) ai...
- Transformers 101 - • Transformers 101
- Low-voltage switchgear: • Low-voltage switchgear
Thank you for watching one of our many educational videos on the topic of power systems. Schedule a visit to one of Eaton's Power Systems Experience Centers in either Pittsburgh or Houston to learn more!
To learn more about Eaton products and our Power Systems Experience Centers: eaton.com/experience
To view more educational videos from Eaton's Power Systems Experience Centers: videos.eaton.com/experience
Chapters
00:00 Intro
01:43 What is a variable frequency drive?
02:52 Why use a VFD?
04:55 How does a VFD work?
05:41 VFD design considerations
10:15 What is a sync transfer system?
10:53 How does sync transfer system work?
13:41 Examples of sync transfer in applications
#vfd #engineering #powersystem #eatonexperience #experiencecenter

[@sasanzeraati6248]

Thanks a lot for the great video.

[@lukeslingher6043]

Very informative.

[@sohailjanjua123]

Hi, I like your video. Thanks

[@hi-io6ry]

Hello, I have a question regarding VFD to mains synchronization.
1. Is mains reference signal taken from the VFD power supply?
2. The output waveform of VFD is PWM square with full DC voltage. Even if you van synchronize the voltage phase of the mains and the VFD output, how can you connect them together, without short circuiting?

[@eatoncorp]

Thank you for reaching out. Please visit shorturl.at/pKMY4 for more information on VFD power supply.

[@SigmaPB777]

kW is actually 75% of HP, I would not consider those even "roughly" the same, and that's at unity PF. The amount of HP delivered to a load would be even worse, seeing as how many motors draw decent VARs.

[@volodumurkalunyak4651]

You mixed up kW and kVA.
For motor running with VFD, appproximate motor effiency * motor power factor (both at full load) should be close to 1HP/1kW. If result is > 1HP/1kW, users get some safety factor (like using buses rated at 400A with at most 350A).

[@SigmaPB777]

@@volodumurkalunyak4651 Perhaps power factor may not play into HP calculations but the actual conversion of kW to HP is 0.746, so 75% like I said.

[@volodumurkalunyak4651]

@@SigmaPB777 power factor isnt incleded in the output HP number, but it is included in input Amps.
All input conductors must be rated for sufficient current (power factor plays a role there).