VDC TAKES ON VAC

VDC TAKES ON VAC

1. In the past

   • Control devices , have required too much power
     • With
       • More emphasis on 24 Vdc as the control voltage of choice
         • those
           • include programmable logic controllers

2. Technology advances

   • appears the power transistors
     • those
       • help to reduce
         • The issues of excessive dc voltage drop over long cable runs
           • appear a new generation of
             • Contactors
             • Starters
             • Control relays
             • Sensors
   • The equipmnet
     • Is focus on
       • The importance of personnel protection
         • using
           • remote switching and arc-venting switchgear
         • also
           • The codes and standards have changed significantly
             • Focus on
               • Reduce the potential of exposure to hazardous-touch voltages.

3. The main objective is prevent the insecurity in the management of the electrical devices

   • And solve the issues that could happen with the changes
     • Also
       • Aspects
         • Design
         • Operational life
         • Reliability
         • Hardware
         • Costs
         • Installation