Method for monitoring the operation of a vehicle electrical system

A method for monitoring an operation of a vehicle electrical system, the method comprising the following steps:

• ascertaining, in a vehicle electrical system channel of the vehicle electrical system, a component temperature of a component in the vehicle electrical system channel, an ambient temperature of the component, and a current flowing through the component;
• in response to detecting an overloading of the component, calculating a period of time to the overloading of the component;
• wherein a heat input into the component and a heat loss of the component are used to ascertain the period of time to the overloading of the component.

An arrangement for monitoring an operation of a vehicle electrical system, the arrangement configured to:

• ascertain, in a vehicle electrical system channel of the vehicle electrical system, a component temperature of a component in the vehicle electrical system channel, an ambient temperature of the component, and a current flowing through the component;
• in response to detecting an overloading of the component, calculate a period of time to the overloading of the component;
• wherein a heat input into the component and a heat loss of the component are used to ascertain the period of time to the overloading of the component.