Knowing how to properly test an electrical ground system is essential to ensure that it has an appropriate current-carrying capability to serve as an adequate zero-voltage reference level.
In this article, we take a look at frequently asked questions by test technicians and trainees related to ground-resistance test methods.
Numerous workers are injured and/or killed each year while working on energized equipment.
Many of these workplace injuries are a result of arc flash, a type of electrical explosion that results from a low-impedance connection to ground or another voltage phase in an electrical system.
The principal function of a current transformer is to produce a manageable level of voltage and current, proportional to the current flowing through its primary winding, for the operation of measuring of protective devices.
In its most basic form, a CT consists of a laminated steel core, a secondary winding around the core, and insulating material surrounding the windings.
Section 110.16 of the National Electric Code requires a label on electrical equipment that warns qualified persons of potential arc flash hazards if that equipment is likely to require examination, adjustment, servicing, or maintenance while energized.
There are three different tests that can be performed with the Megohmeter. A strong understanding of these common test methods is an important tool in gaining the ability to determine the condition and quality of electrical insulation.
There may be instances where mechanical wear or electrical failures can cause a turns ratio test set to be inaccurate or inoperative.
You can verify the performance of your hand-crank TTR by quickly running through the following checks:
Heat is one of the leading causes of transformer failure. The main source of heat generation in transformers are caused by copper loss in the windings and core (IČR losses).
Fire in the workplace can be a very dangerous and terrifying experience. Anyone who doesn't know what to do in the event of a fire is not only a danger to themselves but also everyone around them which is why it's extremely important to know these basic fire prevention and safety tips.