Personal safety from power, Electrical Engineering

Assignment Help:

Personal  safety

Power supplies can be very dangerous. This is specifically true of high voltage circuits, but anything over 12 V must be treated as lethal potentially.

A power supply is not safe after it has been switched off. Filter capacitors can hold charge for the long time. In the high voltage supplies of good design, bleeder resistors of a high ohmic value are connected across each filter capacitor, so that capacitors will discharge in few minutes after supply is turned off. But do not bet your life on components which might not be there, and that can and do sometimes fail.

1481_personal saftey by power.png 
Figure--   A bleeder resistor, R, allows filter capacitors to discharge when a supply is shut off.

Most of the manufacturers supply safety instructions with equipment carrying hazardous voltages. But do not assume something is safe only because dangers are not mentioned in instructions.


Related Discussions:- Personal safety from power

Define the dma controller interface, Define the DMA controller interface. ...

Define the DMA controller interface. A DMA controller interfaces along with a few peripherals which may request DMA. The controller chooses the priority of simultaneous DMA req

Find the duty ratio and neglecting friction and windage, A 440-V, 60-Hz, si...

A 440-V, 60-Hz, six-pole, wye-connected, wound-rotor induction motor with a full-load speed of 1170 r/min has the following per-phase parameters referred to the stator:R 1 = R' 2

Digital electronics, Design a recycling MOD 19 up counter using JK FFs. In ...

Design a recycling MOD 19 up counter using JK FFs. In your design, include the logic circuit diagram and the timing diagram output that counts from 000002 = 010 to 100112 = 1910. C

Find the current in each resistor, For the network shown in Figure, find th...

For the network shown in Figure, find the current in each resistor by means of nodal analysis.

Determine variation of large scale integration chips, Large scale integrati...

Large scale integration chips have between (A) Less than 10 components.         (B) 10 and 100 components. (C) 100 and 1000 components.       (D)  More than 1000 componen

Short circuit, what is the time of short circuit ?

what is the time of short circuit ?

Clipper, application and demerits

application and demerits

Bias compensation, How is bias compensation in transistor is done using the...

How is bias compensation in transistor is done using thermistors and sensistor

Calculate the gain and phase response of fir digital filter, Calculate the ...

Calculate the gain and phase response of an FIR digital filter Calculate the gain and phase response of an FIR digital filter as in below Figure with A 0 = 1, A 1 = 2, A 2 =

Inductive coupling, advantages and disadvantages of inductive coupling

advantages and disadvantages of inductive coupling

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd