 |
Hello and welcome to LMPForum, like most online communities you must register to view or post in our community, but don't worry this is a simple free process that requires minimal information. Take advantage of it immediately Register Now There are many great features that are not available to guests at LMPForum |
Forgot Password |
LMPForum > Viewing Profile|
Profile
Personal Photo
Rating
Options
Personal Statement
AB2005 doesn't have a personal statement currently.
Personal Info
AB2005
Senior Member
31 years old
Gender Not Set
Location Unknown
Born Feb-1-1979
Interests
No Information
Statistics
Joined: 21-October 06
Profile Views: 2,130*
Last Seen: Today, 10:20 AM
Local Time: Sep 7 2010, 08:42 PM
301 posts (0.21 per day)
Contact Information
 No Information
 No Information
 No Information
 No Information
 Private
* Profile views updated each hour
|
Topics
Posts
Blog
Comments
Friends
My Content
25 Aug 2010
Hi dears;
I have been working on an electric trolley project which would be used for material handling. The trolley has a 7.5Kw AC motor which speed would be controlled by an inverter. There is an issue that how to quick stops the trolley during (consider its own weight, having load on it and its high speed) normal working or during an emergency case. As I don’t have experience of such job, so I want to share this case with my friends. There are several possibilities in my mind to stop the trolley; 1) Applying DC injection brake. 2) Installing a mechanical brake then stop the trolley via mech brake + DC Injection brake. 3) Minimum Deceleration time 4) Regenerative brake (with a resistor connected with drive) Can any expert share his experience with me? I fear that a wrong way to fast stop the trolley can damage the inverter.
10 May 2010
We have 273 flood lights each 250W (chock type) in our plant. We tested and found that the light of a 85W energy saver is equivalent with a 250W flood light. Now we have been thinking to replace all the flood lights with energy savers but I think this can increase the harmonics in our supply system. What is the opinion of experts? Have any body don such experiment?
24 Apr 2010
Dear Friends,
As we know that the improvement in power factor effects on looses in power source, cables, bus bars etc due reactive current passing. Does it also effect on fuel economy of generator?
9 Mar 2010
Dear Friends,
I have 95KW two old DC drives at our corrugator's single facers. The drives have 6 thyrister protection fuses in series of incoming power. During a problem in machine, fuse are blown which are very costly. I want to install an electronic over current monitoring system. Locally, we have Electronic Over current Relays with CTs for monitoring the AC line current. Is it possible to install that relay for monitoring the incoming 3 phase current? If not, then what is the recommendation from my friends?
3 Mar 2010
Dear Friends,
I have Nokian PF controller N-12 in PFI improvement plant in main distribution board which rating is 3500A currently supplying only 500-700A. Capacitors are connected in following sequence; • Stage 1 & 2 50KVA • Stage 3 - 6 100KVA • Stage 7-12 150KVA System had been working well but this time I have been facing a problem that Nokian PFC switches ON the stages step by step and when PF reaches at 0.95-98, it switches OFF the all stages and PF drops at 0.6-.7. PFC has been continuously repeating that sequence. Can any body help me out?. |
Last Visitors
Guest
3 Jan 2010 - 8:22
Comments
Other users have left no comments for AB2005.
Friends
There are no friends to display.
|
|
Lo-Fi Version | Time is now: 7th September 2010 - 03:42 PM |
3 Jul 2010 - 1:16