Earthing The Equipment

-
Earthing means connecting the electrical system,  through its non-current carrying conduconductor part, with the ground. The earthing or grounding of a system plays a vital role in maintaining the stability and safety of the system. With poor earthing, electrical systems are prone to damage or accidents. 
Following are some purposes of earthing 
•Fix the potential of active conductors with respect to earth.
•Limit the voltage in electrical system between non-current carrying parts and the earth l.
•Remove risk of electric shocks by implementing protection devices.
•Limit rise in potential because of medium voltage faults in network with low voltage. 

Earthing can be mainly classified as follows:
▪Equipment grounding
▪System grounding 

Equipment grounding
In this type of earthing system, all the metal parts that are not carrying current are interconnected and then they are connected to the earth.Hence, there is no potential or voltage between :
• The metal parts that are not carrying current, such as the enclosure body, cable channels, metal race way and equipment frame.
• The non current carrying metal parts and the earth.

System Grounding
System grounding is used to protect an electrical/ electronic system from any kind of superimposed voltages that are caused by an accidental contact with the systems with high voltage and lightening. This is also required to prevent building of static charge on the equipment.  System Grounding establishes a reference point with zero voltage for the system.

Comments

Post a Comment

Popular posts from this blog

Material Safety Data Sheets (MSDSs)

-
Image
MSDSs are available with most of the products which have potential to cause damage to the equipment or some sort of humans while dealing with them. A few examples of these products are: ▪Cleaning solutions such as LCD Cleaner ▪Battery ▪printer cartridge Cleaning solutions such as LCD cleaner, battery, adapter and printer cartridge. MSDS provides information about the safety factors of handling the products and includes their characteristics,  handling strategy, storage instruction and disposal method. It is the responsibility of the technician to read the MSDS sheets which are available with the products . For example , while using a cleaning product to clean the LCD screen of the monitor, if that product is leaving some patches on the screen, it is advisable to read the MSDS sheets prior to using the product.
Read more

Peripheral Devices

-
Image
Peripheral Devices are the input/output devices that are typically used to feed information and instructions into a computer for storage or processing and to show an output. An input device is any hardware that gives an input to a computer . Apart from mouse and Keyboard there are many other input devices such as webcam, scanner and microphone. An output device gets information from the CPU and displays it to the user as desired. The output is typically presented either on a display device such as a monitor, or on paper (hard copy) with the help of a printer. The peripheral devices are categorized as  PERIPHERAL DEVICES 1. input devices  Webcam, scanner, microphone 2.output devices  Printer, speakers, projector
Read more

Safety Rules, Policies And Procedures

-
Image
As a field technician, there are certain guidelines that must be followed to ensure own safety and that of the co-workers. These guidelines provide a sound, safe and flexible environment to work. Following are some general guidelines to be followed while working with electrical/electronic systems • Follow the correct procedures to ensure zero accidents at work. • obey safety signs, stickers and tags on the equipment/devices • use an appropriate tool for the respective task. • Read labels and instructions given on the components  • wear appropriate clothing and remove metal objects before working. • use prescribed protective safety equipment only. • Follow electrical safety rules when working with electrical machinery/equipment. • Report all unsafe acta or unsafe conditions to the supervisor.
Read more