AIM :- Servicing of UPS by simulating more likely faults and systematic approach to identify and rectify them.
APPARATUS REQUIRED:
Sl. no. Name of Equipment
1 UPS
2 Trainee tool kit
Procedure :-
Common Power Problems Below are some common power problems and their general power protection solutions.
Voltage Surges and Spikes
Surges: Sudden increases in electrical current through the line. Surges can be triggered by heavy equipment being turned off or by utility switching. Surges happen frequently but may not be noticed because they last such a short period of time. They can damage hardware and corrupt data. (Power protection solutions: UPS, surge suppressor or line conditioner)
Spikes: Increase in voltage through the line for a very short period of time. The results can damage hardware and data. (Power protection solutions: UPS, surge suppressor or line conditioner)
Brownout or Voltage Sags A reduction in the incoming electrical current and the cause of most power problems. A computer has to work harder when it is not being supplied enough power creating more wear and shortening the life of critical components. (Power protection solutions: UPS or line conditioner)
Blackouts or Power Failure Complete loss of power can cause the obvious problems of lost data and hardware damage. When power is restored one can also experience the power problems mentioned above: surges, spikes and voltage sags. (Power protection solutions: UPS)
Frequency Variations Change in frequency stability. (Power protection solutions: UPS, surge suppressor or line conditioner).
Line Noise Signals that are embedded or overlaid onto incoming power. This usually doesn't damage hardware but can corrupt data. It is caused from the use of other electrical equipment or household appliances like microwaves, hairdryers or vacuum cleaners. (Power protection solutions: UPS, surge suppressor or line conditioner).
To determine the requirements for a UPS generally involves a balance of cost vs. need. The components of a basic UPS system contain a battery charger/rectifier, batteries, and an inverter. The battery charger is a rectifier that converts AC power to DC in order to charge the batteries. The batteries store power that is supplied to the load when there is a loss or decrease of a certain tolerance of utility supply power. The inverter converts the DC power from the battery to AC power used to supply the load.
