What is a capacitor control?

Capacitor controls are specifically engineered for the control of pole-mounted and pad-mounted switched capacitor banks in electric distribution systems. They benefit utilities by reducing unused capacity, regulating voltage, monitoring line conditions, and protecting capacitor banks.

How to charge capacitors with inrush current?

Capacitors draw large currents from the power source at start-up, which can lead to tripping of the power source due to overload. To limit the inrush current into capacitors, power switches implement constant current charging of capacitors at start-up. To charge the capacitors with inrush current, the output voltage is increased linearly with time.

What happens when a capacitor is charged?

At power up, the output capacitor has zero voltage and there is power dissipation of (VIN X IINRUSH). As the capacitor gets charged, the voltage drop across the power device and the power dissipation decreases.

What is energy storage capacitor?

The energy storage capacitor is used to power the DC/DC converter during an event of failure of power on a field power bus. A capacitor of value typically more than 1 mF is used to provide power to PLC CPU during failure.

Why does eFuse need a large capacitance?

This capacitor draws large current during start-up and can cause the eFUSE to go into shutdown due to overload or due to excessive thermal dissipation. Another similar application of energy storage requiring large capacitance is for motor and servo drives.

What is the output capacitance of a Din power supply?

The output capacitance seen by DIN power supply is unknown. Typically, a DIN power supply of less than 250 W is designed for a maximum capacitive load of 10 mF. Figure 1-2 provides a block diagram of DIN power supply. Figure 1-2. Block Diagram of a DIN Power Supply