Capacitor Arc Cable Room

What are the rated contact gaps in a capacitor bank?

The rated contact gaps were 12 ± 1 mm. To evaluate back-to-back capacitor bank current switching performance, the inrush current was set to 20 kA. The switching current was 400 A and the peak value of recovery voltage was 55 kV. A series of 80 CO operations were executed for each test vacuum circuit breaker.

What is a capacitor bank?

Capacitor banks provide an economical and reliable method to reduce losses, improve system voltage and overall power quality. This paper discusses design considerations and system implications for Eaton’s Cooper PowerTM series externally fused, internally fused or fuseless capacitor banks.

What factors should be considered when designing a capacitor bank?

When designing a capacitor bank, many factors must be taken into consideration: rated voltage, kvar needs, system protection and communications, footprint and more. These factors govern the selection of the capacitor units to be used, along with proper grouping of these units.

What types of capacitors does Eaton offer?

Eaton provides industry-leading capacitor unit designs used across applications, including standard duty (SD), heavy duty (HD) or extreme type (XD); Table 1 provides a comparison of capacitor unit designs.

Can arc arcs melt at a local contact surface in capacitive current switching?

Arcing erosion areas on the contact surfaces of test series A and B During the making operation of capacitive current switching, the prestrike arcs is capable to melt at a local contact surface, which may result in welding between the contacts.

What is an extreme duty capacitor?

Extreme-duty capacitors are designed for the most extreme harmonic environments and should be considered for application on systems with unknown contingencies (including industrial applications). Duty type selection is one of many considerations.