A centrifugal separator for separating a fluid mixture into a first component and a second component , wherein the second component is denser than the first component , said centrifugal separator comprising: a rotating bowl , which is rotatably supported by a frame around a rotational drive shaft , and which rotational drive shaft is rotatable around an axis of rotation ; an electrical motor connected to the rotational drive shaft ; an inlet to the rotating bowl ; a first outlet for the separated lighter first component of the fluid mixture ; and a second outlet for the separated second component of the fluid mixture ; a cooling device for the electrical motor comprising: a body connected to the frame of the centrifugal separator , wherein the body comprises a central opening provided with an inner peripheral surface , which is connected to a stator of the electrical motor ; and wherein the body further comprising an outer peripheral surface ; characterised by , a cooling coil arranged in the body and extending circumferentially around the central opening , wherein the cooling coil comprises a tube provided with an inlet opening and an outlet opening for a cooling fluid ; and wherein a first end part and a second end part of the tube are configured to extend axially in the separator , wherein the inlet opening is arranged in the first end part and the outlet opening is arranged in the second end part . a rotating bowl , which is rotatably supported by a frame around a rotational drive shaft , and which rotational drive shaft is rotatable around an axis of rotation ; an electrical motor connected to the rotational drive shaft ; an inlet to the rotating bowl ; a first outlet for the separated lighter first component of the fluid mixture ; and a second outlet for the separated second component of the fluid mixture ; a cooling device for the electrical motor comprising: a body connected to the frame of the centrifugal separator , wherein the body comprises a central opening provided with an inner peripheral surface , which is connected to a stator of the electrical motor ; and wherein the body further comprising an outer peripheral surface ; characterised by , a cooling coil arranged in the body and extending circumferentially around the central opening , wherein the cooling coil comprises a tube provided with an inlet opening and an outlet opening for a cooling fluid ; and wherein a first end part and a second end part of the tube are configured to extend axially in the separator , wherein the inlet opening is arranged in the first end part and the outlet opening is arranged in the second end part . a body connected to the frame of the centrifugal separator , wherein the body comprises a central opening provided with an inner peripheral surface , which is connected to a stator of the electrical motor ; and wherein the body further comprising an outer peripheral surface ; characterised by , a cooling coil arranged in the body and extending circumferentially around the central opening , wherein the cooling coil comprises a tube provided with an inlet opening and an outlet opening for a cooling fluid ; and wherein a first end part and a second end part of the tube are configured to extend axially in the separator , wherein the inlet opening is arranged in the first end part and the outlet opening is arranged in the second end part . <EOS>