Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / prasanna kumar das
To prevent the equipments from lightning strokes. Because
the cloud is negatively charged at bottom it requires a zero
or a positive potential to discharge, and it selects the
ground (Zero potential) to discharge. If the Telecom
Equipments are fed with positive the cloud will choose the
low resistance tallest positively charged Antenna's to
discharge, this could damage the entire setup of Telecom
equipments. So the Telecom equipments are fed with Negative
supply Voltage
Read more:
http://wiki.answers.com/Q/Why_telecom_equipments_work_in_negative_voltage#ixzz23mgK9os7
| Is This Answer Correct ? | 2 Yes | 0 No |
Post New Answer View All Answers
What kind of maintenance is conducted for Transformer
I have a drawing of a wound rotor induction motor for a crane. This crane motor has 5 forward speeds & 5 reverse speed implemented of course with different amount of resistance for each speed setting selected. What has got me scratching around is the fact that 8 of the 10 speed selections switch in uneven (unbalanced) amounts of resistances on each of the 3 connections to the motor's rotor.Can this be possible? I would have assumed this would produce unbalanced rotor currents and therefore vibration in the motor. I would greatly appreciate anyone's comments on this. Many thanks, Confused.
what is the significance of tan&delta and how it performed in power transformer
why in the three pin plug all 3 pins are cutted ?
How dia computation perfomed in cold rolling mills .
where solid grounding and where grounding through ngr done and why?
What is instrumental error?
how 650 volts creates? where is use?
what is auto re-closer?
Working of microwave oven?
Pl.brief me any electrical major fault you have rectified.
The power supplied to a 33microF capacitor from a 120V, 60Hz source will be
how to setting voltage RTCC panel
how could we know the size of cable by physical view?
howmany electrician should maintain for a 1000 kva used plant... in kerala..
