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Technical Articles

Energy and Power

National Fire Alarm Code Defined By NFPA 72

NFPA 72 is the National Fire Alarm Code. The importance of installing smoke and fire alarms in homes is supported by results from exhaustive investigations of home fires indicating that… Read more

Aug 16, 2013 | By Edvard Csanyi

National Fire Alarm Code Defined By NFPA 72
Electric Motor

Motor Service Factor (SF) Defined By NEMA

Motor Service Factor (SF) is the percentage of overloading the motor can handle for short periods when operating normally within the correct voltage tolerances. This is practical as it gives… Read more

Aug 07, 2013 | By Edvard Csanyi

Motor Service Factor (SF) Defined By NEMA
High Voltage

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 | By Nicola

Talking about HV shunt reactor switching (part 2)
High Voltage

Talking about HV shunt reactor switching (1)

These notes aim to give basic idea of the main criticalities related to HV shunt reactor switching, particularly in terms of voltage, and how such problems are faced and solved… Read more

Jul 29, 2013 | By Nicola

Talking about HV shunt reactor switching
Electric Motor

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 | By Ashok Parikh

Selection Of Crane Duty Motors
Energy and Power

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 | By Edvard Csanyi

Equipotential Bonding For Metal Installations
Electric Motor

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 | By Ashok Parikh

Selection Of Crane Duty Motors (Part 2)
Electric Motor

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 | By Ashok Parikh

Selection Of Crane Duty Motors


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