Power Transformer Testing Author: Velimir Lackovic Transformers may be tested using either AC or DC voltage. AC voltage is preferable to DC voltage for transformer testing because it simulates the internal stress that the transformers face during operating conditions. This course is suitable for engineers interested in learning about commonly used transformer testing procedures. It…
Power Transformer Maintenance Author: Velimir Lackovic Transformer preventative maintenance involves routine inspection, adjustment, testing, minor fixes, and special handling instructions. The trouble-free and reliable operation of transformers over their usable life depends on proper installation, operation, and maintenance. This course provides an overview of the typical procedures that are performed as part of transformer preventive…
Power Cable Testing Author: Velimir Lackovic This course covers power cable testing procedures including visual inspection, cable failures and their analysis, insulation and conductor defects, field testing of medium voltage cables and different cable testing methods. It covers issues related to different failure types such as mechanical failures, overheating, chemical actions etc. and ways to…
Low Voltage Switchgear Author: Velimir Lackovic Arc Low-voltage switchgear generally refers to metal-enclosed or metal-clad low-voltage power circuit breaker switchgear that is rated for 600V alternating current (AC) and below. The metal-enclosed switchgear is completely enclosed on all sides and the top with metal sheets, has stationary primary power circuit switching or interrupting elements, or…
Generator Protection Author: Velimir Lackovic Protection relays are used as part of generator protection schemes, and they are available in various configurations that allow them to be used under a variety of conditions. These protection relays protect the generator or prime mover from damage, and they also provide protection for the external power system and…
Earth Fault Protection Author: Velimir Lackovic Fault statistic suggests that earth faults are the most common fault type. Therefore, earth fault protection is of great importance in electrical networks. The type of earth fault protection selected depends primarily on the type of grounding method. This course describes protection principles for solidly (effectively), reactance, high resistance…