Baumüller BUK622-31-20 High Voltage Capacitor Bank Module

Baumüller BUK622-31-20-000 is an external four-capacitor bank designed to augment the DC intermediate circuit in converter-fed three‑phase drives, storing braking and recovery energy and helping maintain the intermediate circuit voltage during brief mains disturbances. This 20 mF (0.02 F) unit is rated for 310 V DC and is offered as part of Baumüller’s BUK external capacitor family in Type Series 6 housings, with a maximum intermediate circuit voltage of 400 V DC. The charging current is limited by the basic unit, and the permissible charging time per capacitor unit is greater than 1 second, while discharge time exceeds 10 minutes. The standard version is 000, and the assembly is designed for an ambient operating range of 0 to 45 °C with a storage range of -30 to +70 °C. Energy storage during braking is approximately 640 Ws (calculated from C × (U2^2 − U1^2)/2 with U1 = 310 V and U2 = 400 V).