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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) Opening operation… Read more

Jul 31, 2013 | Nicola

Talking about HV shunt reactor switching (part 2)

Talking about HV shunt reactor switching (part 1)

Scope Shunt reactors application Closing operation Opening operation (in next part) Conclusions (in next part) These notes aim to give basic idea of the main criticalities related to HV shunt reactor switching, particularly… Read more

Jul 29, 2013 | Nicola

Talking about HV shunt reactor switching

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 = Maximum… Read more

Jul 27, 2013 | Ashok Parikh

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 earth electrode… Read more

Jul 26, 2013 | Edvard

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 and Wound… Read more

Jul 24, 2013 | Ashok Parikh

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 their specified… Read more

Jul 22, 2013 | Ashok Parikh

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 and authorized… Read more

Jul 15, 2013 | Edvard

NEC Branch Circuit Requirements
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