Aleen brings a unique skillset in that he has six years of experience as a utility consultant and five years of experience as an engineer at a public utility. In these roles, he created physical design drawings, protection & control drawings, and SCADA drawings for numerous substations and successfully managed projects as a lead engineer to meet scope, schedule, and budget requirements.
Aleen also has experience in conducting system studies for industrial facilities to determine available short-circuit current to specify equipment, arc-flash hazard study using IEEE 1584 to specify PPE, and load flow studies to specify capacitors.
Besides work, he has contributed to the IEEE 1584 standard and PJM’s (Designated Entity) substation standards.
Surge arresters are primarily used to discharge lightning strikes and switching surges to ground – protecting equipment in the process. Note that arresters are not applied to relieve the system from temporary over-voltages.
Air has a dielectric strength of 33kV/cm. SF6 gas, on the other hand, has a dielectric strength of ~83kV/cm. Naturally, when the live parts are immersed in a pressurized gas chamber they can be placed a lot closer.
Capacitors consume active power and release reactive power. They also present a low impedance to harmonics in other words they attract harmonic frequencies. Thus, capacitor banks are installed in substations to: