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It is necessary to create an outlet connects realizezei soil and ground terminal of the transformer and plug the newly created. In my country may be about to strip OlZn with minimum 100 mm square section.
An unintended consequence for “going green” is the cost of replacement. We are starting to see municipals changing out incandescent traffic lights to LED based traffic signals. Two problems occur:
1. The LED lights don’t generate enough heat during the winter, and they are easily covered with snow and ice creating hazardous traffic crossings.
2. The failure rate of LED based lights due to low level surges is dramatic compared when the traffic system was comprised of incandescent bulbs.
The surge problem was addressed by installing surge protectors at each traffic cabinet.
SEREYBOTH said:
Hello,
I am cambodia.I am not well in writing English,working at Siem Reap diesel power plant(10MW).Now my country has many lightnings during raining that kills people, damages eletrical overhead transmission line(22kv) and low voltage electric devices.
could you help me, how protection,how to get a good skill in surge protection ! ! !
Hello,
I am from Malaysia which has more lightning than Cambodia. I have written some articles on direct strike lightning protection which may help you:
http://www.lightningsafetyalliance.com/documents/streamer_emission.pdfhttp://www.lightningsafetyalliance.com/documents/acem_air_terminals.pdf
http://www.lightningsafety.com/nlsi_lhm/early-streamer-emission.pdfhttp://www.lightningsafety.com/nlsi_lhm/ACEM_Journal_Q1_2007.pdf
http://akihito-shigeno.com/files/Hartono_ICLP2008_1_.pdfhttp://www.mikeholt.com/newsletters.php?action=display&letterID=823
http://www.lightningsafety.com/nlsi_lhm/misconceptions-about-lightning.pdf
Best regards
ParadiesVogel said:
Hi Dear engineers,
Is it true if i say” the only usage of reactive power is generating the flux needed for ferromagnetic circuits such as transformers, motors, ballasts, etc” ? I hope you can help me understand the real meaning of reactive power. :)
Hi,Reactive power has no usage because it is a purely mathematical concept.
Ferromagnetic devices are inductive circuits. This means that the current is mostly in quadrature with the voltage. As the Reactive power is the product of the voltage times the quadrature component of the current, (See the post “How to illustrate Reactive Power“) that’s why reactive power is present in these circuits.
There is probably not one single solution to the problem. See the interesting paper at the address below:
ya firstly i m saying ur question iz not fully correct…….nd its various undesirable answers………hay.buddy……………….really u stupid……………….simply we can switch ………then we can ……….do
hello there you would have several different surface mounting cableing and assessory options and with carefull planning and installation care and good workmanship you will achieve an electrical install that wont take from the stone work … also you can get wireless switches for all your lighting so you dont need to run from celing points to switches , this will save alot of cable runs down walls, the switch sends a remote siginal to light point ….colm [sparkey]
just install 10KVA individual transformer & voltage regulator to your home, max 10 person dwelling
compute the peak load voltage, update existing load & add 3x grounding connection .
invite me to forum here & abroad,
Thanks & regards
from:
First of all there should be a consultant who has prepared specifications,drawings,BOQ etc
There should be a contract and programme of work approved by consultant
Shop drawings should be approved.
Check material according to specifications and BOQ,submit samples for approval
Start installation in the presence of consultant
Then lay cables and connect as per drawing
If you notice any discrepancies in the drawing report to consultant and get amended
Let consultant do a visual inspection and clear any remarks
Afterwards test(primary/secondary) injection for relays,oil,CB,battery,alarms,earth etc in the presence of consultant
After test results were approved by consultant you may energise section by section
Rashid said:
Hi!!
Could anybody tell me How to control 3 savers by 4 switches??
Worried Rashid.
two switches are connected directly with two savers and two switches are connected with one sever
Abdul Ahad
i think if you want have a safty system in this fild of industerial you must use from good tools and compnnent whit out think about cost and i think you should use circuit-breaker.
have a good time
have safe time
Hello,
In Schneider Electric’s website, you will find a section fully dedicated to people’s safety and protection against electric schocks. Browsing this section you will get a complete review of the good practices, and animations explaining how the safety devices operate in various hazard conditions. Hoping this will help improve the safety level of your designs.
