Interested to Buy Any Domain ? << Click Here >> for more details...
why contactor not provided between output of VFD and motor?
- 6 Answers
- 22027 Views
- Siemens, I also Faced
- E-Mail Answers
Answer Posted / jayaseelan
This will cause unnecessary wear on the contactor and
there will always be a slight delay while the inverter
initialises.ie.if contactor placed in between vfd and motor
response time of contactor gettting on is slow compare to
vfd response speed so return current wii affect the
electronic bords.thats y contactors not not used in output
of vfd.
| Is This Answer Correct ? | 6 Yes | 6 No |
Post New Answer View All Answers
If a rotary UPS is in line through grid power; What would be the impact on Power Factor if the load through rotary ups is 25% , 50% , 75% & 100%. Will the power factor reduce with less load?
What is reactive power and where it is used.
What is inrush current? how can calculateit? what is the affect of it?
Why do we need a separate control desk & PLC control panel in Boiler plant or coal handling plant? Can we provide cost effective Control desk cum PLC panel. Is there is an specific need for control desk.. kindly advice.
Briefly describe means used by electricity suppliers to influence the flow of active and reactive power in power networks (one for each type)?
in our all power plant have connected in grid and grid voltage and plant voltage is same, but as per as electrical concept the power will transmit from high potential to low potential but here altough same,then how power transmit from power plant to grid.
What is the permissible maximum flux density in transformer core?
what is model question rrb junior engineer electrical gr.II
how can motor both beasrings insulation resistance can be check?
can anybody send me syllabus of rrb section engg (electrical). and also send previous question pepar...
why do we carry out winding resistance test?
Good morning: I'm looking for some informations about the OLTC or the LTC: I wont to know what the function of the tie-resistor in during the operation of reversing/coarse operation Cordially
1)how to reduce the value of tan delta of trasformer and CB,bushing,CT&PT,CVT ? 2)how to reduce the resistance of CB contact and its operating time? 3)plz.....send me the project report on conditioning and monitoring of substation equipment on my email id (gusaiyogendra03@gmail.com)
why the check zone and main zone are used for Busbar Protn. scheem?
How many wall/floor flange will i use in bus duct system if we have in our design a 35th floor building.
