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Grounding and shielding ppt

A ground electrode or ground rod is intended to dissipate static, switching surges, and lightning. A ground rod and earth present a resistance too high for low-voltage breakers and fuses to open quickly. There must be a low-impedance equipment grounding conductor between each electrical enclosure and the source transformer grounding electrode.

Then, the USB ground has to be connected to the negative terminal of the battery, 0V for the microcontroller and ADCs, -1.65V regarding zero transimpedance output. I have received conflicting advice on how best to shield this circuit, one idea being to connect the shield to 1.65V, coupling the shield to the zero level of the transimpedance.

Grounding has a key role in the correct operation of the electrical systems, either power or electronics, as well as protecting people. System grounding helps detect and clear ground faults. Equipment grounding provides a return path for ground-fault current. Bonding keeps electrical continuity and conductivity.

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The term Earthing or Grounding simply means connecting the . electrical system / equipment to the ground by means of a suitable conductor. Such a ground connection provides a common return path for safe discharge of electricity to the ground. A properly grounded electrical system serves mainly two purposes:. The author examines the grounding and shielding requirements and techniques in circuit design and applies basic physics to circuit behavior. The sixth edition of this book has been updated with new material added throughout the chapters where appropriate. The presentation of the book has also been rearranged in order to reflect the current.

Radiation shielding is based on the principle of attenuation, which is the ability to reduce a wave’s or ray’s effect by blocking or bouncing particles through a barrier material. Charged particles may be attenuated by losing energy to reactions with electrons in the barrier, while x-ray and gamma radiation are attenuated through.

Grounding and shielding policy Front end +1.25V ; 0V I= 80 mA Optical hybrid supply voltage: Control system CCU I =300 mA DOH I =300 mA W. Karpinski, Nov. 2001 voltage drop = 5V Patch Panel 3 (PP3) in USC55 – PP2 on balconies ~100m PP2– PP1 on HCAL ~40m PP1 - module groups ~2m-5m W. Karpinski, Nov. 2001.

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