Kelvion has launched a new transformer oil pump that combines maintenance-free sleeve bearings with a lightweight cast-aluminium case.
The Renzmann-PR 200 pump combines benefits such as low weight, a temperature application range down to -40°C, and maintenance-free sleeve bearings.
The propeller pump is designed to support the circulation of insulating oil for radiator cooling: for example, when natural convection does not suffice during startup, or if high ambient temperatures make more intensive cooling necessary.
Owing to the large cross-section of the propeller pump, the natural flow is not impeded, even when the pump is not in operation. As such, a bypass is not necessary.