Patent ID: 6927369

Claim:
A heating system having an electrical heating conductor arrangement ( 1 . 1 ) which is integrated into a flexible heating body ( 1 ) connectible to a supply voltage (UV) by a connecting cable and which has a first conductor (Rhz 1 ) and an adjacent second conductor (Rhz 2 ), placed in series with the first conductor (Rhz 1 ) and separated from the first conductor (Rhz 1 ) by an insulating device (INTC), the heating system having a heating circuit ( 3 ), which is formed by the heating conductor arrangement and further elements, including a control element (THY 1 ) for a heating current (iH), and having a control circuit ( 2 ) which is connected to a control member ( 3 ) for affecting the heating current (iH) and regulating a temperature, the heating system comprising: the insulating device (INTC) having a resistance characteristic which decreases with temperature, the control circuit ( 2 ) coupled via a monitoring branch ( 20 ) to a section of the heating circuit ( 3 ) which as a function of the temperature of the insulating device (INTC) responds to a resistance temperature change in the insulating device (INTC) for picking up an electrical monitoring current or voltage, and the control circuit ( 2 ) responding when a monitoring signal exceeds a threshold and interrupts the heating current (iH) by triggering the control element (THY 1 ).