Category Archives: Control Engineering

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IP Telephony System Installation Method Statement

All material used at the project site shall be approved prior to the start of IP Telephony system installation works. Materials and documentation relevant to a particular section of works will be checked by the site/project engineer prior to the commencement of work ensuring that these are of the correct type as reviewed by the… Read More »

Contactor Construction & Operating Principle

A contactor is an electrically controlled switch used for switching an electrical power circuit , similar to a relay except with higher current ratings. Contactor is in fact an electromechanical switch. Low-voltage Contactor is an electrically controlled switch used for switching an electrical power circuit, similar to a relay except with higher current ratings. A… Read More »

Fiber Optic Advantage Over Copper Cables

In recent years it has become apparent that fiber-optics are steadily replacing copper wire as an appropriate means of communication signal transmission. They span the long distances between local phone systems as well as providing the backbone for many network systems. Other system users include cable television services, university campuses, office buildings, industrial plants, and… Read More »

Fiber Optic Connectors Selection Guide

The selection of fiber optic connectors and FO cable termination strategy depends on the application, cost considerations and your own personal preferences. The following connector comparisons can make the decision easier if you really want to go for best option. Epoxy & Polish Style Fiber Optic Connectors Epoxy & polish style connectors were the original… Read More »

Electrical Busbar Protection – Differential Relay Function

Differential busbar protection is the most common and reliable scheme for the bus bar protection. Earlier there was no other option to use only conventional over current relays for busbar protection. But it is desirable that fault in any feeder or transformer connected to the busbar system should not disturb overall busbar system. Due to… Read More »