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Monthly Archive for: «July, 2013»

Talking about HV shunt reactor switching (part 2)

Continued from first part: Talking About HV Shunt Reactor Switching (part 1) Scope (explained in previous part) Shunt reactors application (explained in previous part) Closing operation (explained in previous part)… Read more

Jul 31, 2013 | High Voltage

Talking about HV shunt reactor switching (part 2)

Selection Of Crane Duty Motors (Part 3)

Continued from second part: Selection Of Crane Duty Motors (Part 2) N = Duration of motor operation under rated conditions R = Duration of motor at rest and de-energised ØMax… Read more

Jul 27, 2013 | Electric Motor

Selection Of Crane Duty Motors

Equipotential Bonding For Metal Installations

The electrical low voltage consumer’s installation requiring certain earthing resistances (disconnection conditions of the protective elements) and the foundation earth electrode providing good earthing resistances at cost-effective installation, the foundation… Read more

Jul 26, 2013 | Energy and Power

Equipotential Bonding For Metal Installations

Selection Of Crane Duty Motors (Part 2)

Continued from first part: Selection Of Crane Duty Motors (Part 1) Following two types of motors are widely used for crane duty applications. Squirrel Cage Crane Duty Motors Slip ring… Read more

Jul 24, 2013 | Electric Motor

Selection Of Crane Duty Motors (Part 2)

Selection Of Crane Duty Motors (Part 1)

The operating conditions such as duty cycle, startup, temperature and operating environment are vital considerations in the motor efficiency and reliability. It is absolutely essential to match the motors to… Read more

Jul 22, 2013 | Electric Motor

Selection Of Crane Duty Motors

NEC Branch Circuit Requirements

The National Electrical Code (NEC 2011) provides guidance for electrical contractors and electricians, but it is really intended for use by governmental agencies that have legal jurisdiction over electrical installations… Read more

Jul 15, 2013 | Energy and Power

NEC Branch Circuit Requirements
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