Capacitor banks consist of groups of capacitors connected in series or parallel that are used to store electrical energy at a greater capacity than individual capacitors. They are commonly installed in industrial facilities to correct power factor lag and improve efficiency by compensating for the phase shift caused by transformers and electric motors under inductive load. Other applications of capacitor banks include their use in power supplies, lasers, radars, fusion research and weapons systems.

1. Name : Ridwan Ma’ruf Y
Number : 22 / 1431120008
Class : D3 TL 2C
Capasitor Bank
Capacitor Bank is a group of several capacitors of the same rating that are connected
in series or parallel with each other to store electrical energy . The resulting bank is then used
to counteract or correct a power factor lag or phase shift in an alternative current (AC) power
supply. They can also be used in a direct current (DC) power supply to increase the ripple
current capacity of the power supply or to increase the overall amount of stored energy.
Capacitor banks work on the same theory that a single capacitor does; they are
designed to store electrical energy, just at a greater capacity than a single device. An
individual capacitor consists of two conductors which are separated by a dielectric or
insulating material. When current is sent through the conductors, an electric field that is static
in nature then develops in the dielectric which acts as stored energy. The dielectric is designed
to permit a predetermined amount of leakage which will gradually dissipate the energy stored
in the device which is one of the larger differences between capacitors and batteries.
The most common use of a capacitor bank for AC power supply error correction is in
industrial environments which use a large number of transformers and electric motors. Since
this equipment uses an inductive load, they are susceptible to phase shifts and power factor
lags in the power supply which can result in a loss of system efficiency if left uncorrected. By
incorporating a capacitor bank in the system, the power lag can be corrected at the cheapest
cost for the company when compared to making significant changes to the company power
grid or system that is supplying the equipment. Other uses for capacitor banks include Marx
generators, pulsed lasers, radars, fusion research, nuclear weapons detonators, and
electromagnetic railguns and coilguns.

2. Please answer the question with true or false answer.
1. Capacitor bank used to improve the power factor.
2. Capacitor serves to store electrical energy.
3. V x I x cos phi = P, bukan rumus untuk mecari faktor daya (cos phi).
4. The most common use of a capacitor bank for AC power supply error correction is in
industrial environments which use a large number of transformers and electric motors.
5. Farad is a unit of the capacitor.
6. Maximizing Power Consumption attached (kVA) is one of the benefits of the
installation of capacitor bank.
7. Capacitor bank used to save energy.
8. Capacitor bank is generally not used for power factor correction and reactive power
compensation.
9. Farad not units of the capacitor.
10. To improve the power factor required at least one capacitor.
key answer :
1. T 6. T
2. T 7. F
3. F 8. F
4. T 9. F
5. T 10. F

3. Game of question
Match the terns in coloumn B with the phrases in coloum A
Coloum A Coloumn B
1. Formula to find cos phi a. Farad
2. Capasitor units b. storing electrical energy
3. Usefulness of the capacitor bank c. power factor correction and
reactive power compensation
4. Function capacitor d. P = V x I x cos phi
5. one of the benefits of the installation e. Maximizing Power Consumption
of capacitor bank attached (kVA)
key answer :
1. d
2. a
3. c
4. b
5. e
Activities in the workshop and in the classroom
1. In the workshop
 Measuring
 Reading
 Filing
 Writing
 Drilling
 Sawing
 Connecting
 Anticipating
 Drawing
 Create reports
 connecting cables
 listen, etc.

4. 2. In the classroom
 Reading
 Writing
 Counting
 Percentage
 Listening
 Discussion
 Quizzes
 Sitting
 Adaptation
 answering questions
 introductions, etc.