Power distribution

SOURCE : provides power

There are 3 types of  Sources

1. is Main Source - utility

2. is Back Up Source - Generator

  1. is Emergency source - uninterruptible Power Supply (UPS), which provides immediate backup power in case of electrical interruptions.


LOAD - Load use power to do the work

Mechanical w = Force x Distance FXD

Electrical work = Power x Time

Power = Current x Voltage [ P = I \times V ]

  • where P represents power in watts (W), I is the current in amperes (A), and V is the voltage in volts (V).


    nana= 10^-9

    micro = 10^-6

    milli = 10^-3

  • kilo = 10^3

  • mega = 10^6

  • giga = 10^9


Data Center Load Types

  1. Critical loads     a. Racks
                              b. Fire systems

  2. Mechanical Load -Fans, Pumps, Motors.


3 ways shock can impact

  1. Touch Potential ( Most dangerous)

  • current enters through one hand and exits from other hand

  • Precautions ( PPE, One hand rule (gloves )


    2, Step Potential

occurs when a person is in contact with the ground and a voltage difference exists between their feet, causing current to flow through their body.


  1. Touch and step potential

        -current enters from one hand /feet and exits from other foot/ hand

        -Precaution: Gloves, PPE, Rubber boot


Conduction and Induction

Conduction requires two objects to physically through.

  • one object is charged and the other is not

  • Charged from highly charged object to low charged object until equilibrium is reached, resulting in both objects having the same charge distribution.


Induction

  • charged object will create magnetic field

  • This process occurs without direct contact, as the charged object induces a polarization in the neutral object, leading to movement of charges within it.

  • Consequently, the neutral object becomes polarized with one side exhibiting a positive charge and the other a negative charge, effectively allowing for charge separation and creating an attractive force between the charged and the neutral objects.


1.       The combination of winding losses and self-induction is referred to as