👉Discover our ELECTRICAL COMMANDS course ➽https://eletr.co/j08m (Sign up for the Course to Expand your Range of Services and Become a Specialized Electrician) ...................................................................... ✅ Did you like this video? ✅ Subscribe to the channel ➽ https://engehall.com.br/industrial ✍ Leave your comment 📢 Share with friends 🕵 Follow our networks ➽ https://engehall.com.br/links_ind ...................................................................... Hey, my electrician friend. Welcome to another video here on our channel. Today, we are bringing another video in our series on CAPACITOR BANK. In the previous video, we saw how to size each device to assemble a capacitor bank. In today's episode, we will guide you on the four mistakes that many technicians make when assembling a capacitor bank. To start our list, the main error lies in the inadequate sizing of the circuit breakers. For this specific application, the use of DIN type circuit breakers is not recommended, since their interrupting capacity is quite limited and the peak current generated by the capacitors during actuation is substantially high, representing a risk of damage to this component. Other frequently observed mistakes include the inadequate selection of terminals, the use of conventional contactors instead of contactors designed specifically for the operation of capacitors, and the lack of adequate ventilation to facilitate heat dissipation, thus avoiding excessive temperature increase inside the capacitor bank. To understand in more detail what these errors can cause, the Ambassador brings the tips, and you cannot miss today's video! #embaixadordecomandosengehall ………………………………………………………………………………………………….. The equipment in the industrial environment is, for the most part, induction electric motors, transformers, among others. Such equipment requires inductive reactive energy. A transformer, when oversized or operating without load, causes low PF. Since, to ensure its operation, the transformer needs reactive energy for the circulation of the magnetic flux in its core and, as there is little or no consumption of active power in its secondary, this proportionality causes a low PF (SILVA, 2009). The electric motor, similarly, when operating without load or with a small load on the shaft, also has a reduced proportion between active and reactive power, thus causing low PF (CELESC, 2014; SILVA, 2009). There are situations in which oversizing the motor is necessary, such as when a high starting torque is needed to break the machine's inertia and, requesting little load in operation (WANDER et al., 2007). According to Silva (2009), another factor that is associated with low PF is the increase in voltage in the machine. Regardless of the electrical machine, when there is a magnetic field, the growth of inductive reactive power depends on the electromagnetic behavior of the circuit, characterized by the dependence between the magnetization curve and the voltage applied. This fact becomes more pronounced as the voltage imposed on the machine causes the magnetization curve to shift above the material's saturation point. The authors Silva (2009) and Celesc (2014) also present the ballasts that power discharge lamps (metal vapor, mercury vapor, sodium vapor or fluorescent). These ballasts, like motors and transformers, have coils and cause low PF. Silva (2013), in turn, mentions electronic ballasts that, if of good origin and with the correct specifications, present high PF levels, which can reach 100%. The use of low-power electric motors in large quantities causes low PF in installations. This is due to the oversizing normally used to obtain greater torque at start-up and due to their own construction, since their construction characteristics adopted by manufacturers cause a lower PF. The need to increase the number of poles to reduce the speed of the motors, which results in a greater number of coils, also puts these machines in evidence when analyzing the low PF. Mamede Filho (2013) shows that, in practice, during the preparation of electrical projects for small industries, it is very difficult to know, with reasonable confidence, technical details and the operating behavior of the plant, such as: Daily, weekly, monthly and even annual operating cycle; Motor load rate; Technical characteristics of motors; Schedule for expansion of production activities. Such data are used to determine the presumed average PF of the installation and, if necessary, to foresee the means necessary for its correction.