A hydraulic unit with a first and at least one further pressure outlet (2, 3) for the selective supply of a single hydraulically drivable rescue device (4; 5) at one of the pressure outlets (2, 3) with pressurized hydraulic fluid, or for the simultaneous supply of multiple hydraulically drivable rescue devices (4, 5) at the pressure outlets (2, 3) with pressurized hydraulic fluid, comprising - a first hydraulic circuit with a first pump arrangement comprising at least one high-pressure pump element and at least one low-pressure pump element with delivery quantities differing from one another, from which first pump arrangement fluid lines lead to the first pressure outlet, - a second hydraulic circuit with a second pump arrangement comprising at least one high-pressure pump element and at least one low-pressure pump element with delivery quantities differing from one another, from which second pump arrangement fluid lines lead to the at least one further pressure outlet, - a controlled variable-speed drive motor in the form of an internal combustion engine or an electric motor for joint coupled driving of the first and second pump arrangements (12, 15), - at least one hydraulic switching device with at least one directional valve (26, 28) for the controllable accumulation of delivery quantities of the first and second pump arrangements (12, 15) and for the controllable separation of accumulated delivery quantities of the first and second pump arrangements (12, 15), characterized in that at least one temperature sensor is configured to detect the temperature of the hydraulic fluid, that in each case at least one pressure sensor (40, 41) is configured to detect hydraulic pressure ratios at the first and the at least one further pressure outlet (2, 3), and that an electronic control device is formed, which is connected to the at least one temperature sensor and the at least one pressure sensor (40, 41), wherein the electronic control device is configured to (i) suppress or render inactive a pressure-dependently controlled accumulation and accumulated supply of delivery quantities of the first and second pump arrangements (12, 15) to a common, individual pressure outlet (2; 3), and (ii) suppress or render inactive a hydraulically or electrically controlled, automated speed increase of the drive motor, if the temperature value of the hydraulic fluid detected by the at least one temperature sensor is below a predetermined temperature threshold value for the hydraulic fluid and if, in addition, the pressure detected by the at least one pressure sensor (40, 41) at each of the pressure outlets (2, 3) is below a predetermined pressure threshold value. - a first hydraulic circuit with a first pump arrangement comprising at least one high-pressure pump element and at least one low-pressure pump element with delivery quantities differing from one another, from which first pump arrangement fluid lines lead to the first pressure outlet, - a second hydraulic circuit with a second pump arrangement comprising at least one high-pressure pump element and at least one low-pressure pump element with delivery quantities differing from one another, from which second pump arrangement fluid lines lead to the at least one further pressure outlet, - a controlled variable-speed drive motor in the form of an internal combustion engine or an electric motor for joint coupled driving of the first and second pump arrangements (12, 15), - at least one hydraulic switching device with at least one directional valve (26, 28) for the controllable accumulation of delivery quantities of the first and second pump arrangements (12, 15) and for the controllable separation of accumulated delivery quantities of the first and second pump arrangements (12, 15), at least one temperature sensor is configured to detect the temperature of the hydraulic fluid, that in each case at least one pressure sensor (40, 41) is configured to detect hydraulic pressure ratios at the first and the at least one further pressure outlet (2, 3), and that an electronic control device is formed, which is connected to the at least one temperature sensor and the at least one pressure sensor (40, 41), wherein the electronic control device is configured to (i) suppress or render inactive a pressure-dependently controlled accumulation and accumulated supply of delivery quantities of the first and second pump arrangements (12, 15) to a common, individual pressure outlet (2; 3), and (ii) suppress or render inactive a hydraulically or electrically controlled, automated speed increase of the drive motor, (i) suppress or render inactive a pressure-dependently controlled accumulation and accumulated supply of delivery quantities of the first and second pump arrangements (12, 15) to a common, individual pressure outlet (2; 3), and (ii) suppress or render inactive a hydraulically or electrically controlled, automated speed increase of the drive motor, if the temperature value of the hydraulic fluid detected by the at least one temperature sensor is below a predetermined temperature threshold value for the hydraulic fluid and if, in addition, the pressure detected by the at least one pressure sensor (40, 41) at each of the pressure outlets (2, 3) is below a predetermined pressure threshold value.