What fuse size would be required for the capacitor when calculating the new power factor with a 100 Kvar capacitor?

To determine the correct fuse size for a 100 KVAR capacitor, it’s essential to understand the relationship between power factor correction and the required protection device. The purpose of the fuse is to protect the capacitor from overcurrent conditions that could lead to failure or a fire risk.

In this context, when a capacitor bank of 100 KVAR is connected to an electrical system, the current flowing through the capacitor can be calculated using the formula:

[ I = \frac{Q}{V} ]

Where:

• ( I ) is the current in amperes (A),

• ( Q ) is the reactive power in kilovolt-amperes reactive (KVAR),

• ( V ) is the voltage in volts (V).

To find the required fuse size, we assume that the voltage level is known (commonly 480V for industrial applications). For example, if we use a voltage of 480V:

[ I = \frac{100,000 VAR}{480V} = 208.3 A ]

However, in practice, the selection of the fuse typically considers a fraction of this calculation to avoid nuisance blowing while ensuring effective protection. Capacitors also often operate with safety factors built into their protection schemes,