A turbomachine arrangement comprising - a blade of a turbomachine; and - a platform cooling device for the blade configured to be positioned at a platform of the blade , the platform cooling device comprising: - a peripheral edge configured to be in contact with the platform ; and - a first surface portion configured to form a first cavity between the platform cooling device and the platform , the first surface portion comprising a plurality of impingement holes configured to impinge onto the platform during operation of the turbomachine; and - a second surface portion configured to form a second cavity between the platform cooling device and the platform ; and - a barrier configured to be in contact with the platform , the barrier forming a connection between two sections of the edge and separating the first cavity from the second cavity fluidically; characterized in that - the platform cooling device and the blade are separately manufactured components, and - the platform cooling device is connected at the edge to the blade , such that the first cavity and the second cavity are formed between the platform cooling device and the blade , and - the blade comprises a cooling fluid supply passage , connecting a hollow blade core and the second cavity , for supplying of cooling fluid to the second cavity during operation, and - the first cavity is supplied, during operation, with cooling fluid via the impingement holes of the first surface portion . - a blade of a turbomachine; and - a platform cooling device for the blade configured to be positioned at a platform of the blade , the platform cooling device comprising: - a peripheral edge configured to be in contact with the platform ; and - a first surface portion configured to form a first cavity between the platform cooling device and the platform , the first surface portion comprising a plurality of impingement holes configured to impinge onto the platform during operation of the turbomachine; and - a second surface portion configured to form a second cavity between the platform cooling device and the platform ; and - a barrier configured to be in contact with the platform , the barrier forming a connection between two sections of the edge and separating the first cavity from the second cavity fluidically; characterized in that - a peripheral edge configured to be in contact with the platform ; and - a first surface portion configured to form a first cavity between the platform cooling device and the platform , the first surface portion comprising a plurality of impingement holes configured to impinge onto the platform during operation of the turbomachine; and - a second surface portion configured to form a second cavity between the platform cooling device and the platform ; and - a barrier configured to be in contact with the platform , the barrier forming a connection between two sections of the edge and separating the first cavity from the second cavity fluidically; characterized in that - the platform cooling device and the blade are separately manufactured components, and - the platform cooling device is connected at the edge to the blade , such that the first cavity and the second cavity are formed between the platform cooling device and the blade , and - the blade comprises a cooling fluid supply passage , connecting a hollow blade core and the second cavity , for supplying of cooling fluid to the second cavity during operation, and - the first cavity is supplied, during operation, with cooling fluid via the impingement holes of the first surface portion . <EOS>