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Friday, November 24, 2017

PCE Related Acts and Regulations

Peace be upon all of you

Based on the syllabus for the Professional Competency Examination and Electrical Discipline, these are most of the acts and regulations mentioned, especially in preparation for the Common  Paper 1. 


Info on allowance to bring in printed and binded books.

Here are the links to the docs from related government websites. I pray and wish all the best of luck to all the candidates sitting for PCE this coming 29th and 30th November 2017.

Monday, November 20, 2017

Economy Resistor in Vacuum Contactor Unit

1. What is economy resistor?
A resistor placed in series with the DC closing coil of the VCU or other type of DC coil to limit the current to the closing coil during running. Used with DC contractors category DC-14.


2. Operation example of a TAMCO 3.3kV VCU
- RL-2 and RL-3 closes when RL relay energized.
- CC energized via CC (NC) contact
- CC (NC) opens and CC is energized via RES resistor (economy resistor) to limit the current.