Method and apparatus for dynamic power to a cooling device for cooling a metal strip or other rolling with coolant

The present invention relates to a method for dynamic power of a cooling device, in particular of at least one spray bar for the cooling of metal strip or other rolling with coolant. According to the method, a preaccelerated coolant flow is provided, which bypasses the cooling device (1) and is led in a return line (3). Furthermore, the presence and / or the temperature of a to be cooled metal band or other rolled stock is monitored and the flow of coolant to the cooling device (1) deflected in dependence on the presence and / or the temperature of the metal strip or the other rolling, wherein the coolant stream instead of the cooling device ( to work 1) and to be guided into a return (3), the cooling device (1) is supplied to the cooling of the metal strip or the other rolling. Further, the present invention comprises a corresponding apparatus for performing the method.