Bus terminal (101, 201, 301, 401) for an automation system (600, 700) for monitoring a power supply grid, wherein the bus terminal (101, 201, 301, 401) comprises: a first clock, a communication interface for communicating via a communication network of the automation system (600, 700), wherein the communication interface is configured to receive a reference time via the communication network, wherein the communication interface is configured to synchronize the time of the first clock to the reference time, a measurement converter, configured as an analogue-to-digital converter, for measuring one or more electrical variables of the power supply grid (403, 601, 701), in order to take the one or more measured electrical variables as a basis for providing corresponding digital measurement data, and a processor device comprising: a second clock, which is configured to take a provision signal supplied to the second clock by the measurement converter as a basis for generating a time signal, wherein the second clock is furthermore configured to prompt the first clock to periodically provide the synchronized time, a first logic unit configured to assign the time signal to the provided digital measurement data, a searching unit configured to examine the provided digital measurement data and/or first derived data based on the provided digital measurement data for the occurrence of one or more predetermined events, in order to take the detection of the occurrence of one or more predetermined events as a basis for generating corresponding event data based on the digital measurement data and/or on the first derived data of the event or events, a second logic unit configured to provide the event data and/or second derived data based on the event data with a timestamp, in order therefore to generate payload data, wherein the timestamp is based on a combination of the synchronized time provided by the first clock and the time signal assigned to the digital measurement data of the event or events, wherein the communication interface is configured to send the generated payload data via the communication network. a first clock, a communication interface for communicating via a communication network of the automation system (600, 700), wherein the communication interface is configured to receive a reference time via the communication network, wherein the communication interface is configured to synchronize the time of the first clock to the reference time, a measurement converter, configured as an analogue-to-digital converter, for measuring one or more electrical variables of the power supply grid (403, 601, 701), in order to take the one or more measured electrical variables as a basis for providing corresponding digital measurement data, and a processor device comprising: a second clock, which is configured to take a provision signal supplied to the second clock by the measurement converter as a basis for generating a time signal, wherein the second clock is furthermore configured to prompt the first clock to periodically provide the synchronized time, a first logic unit configured to assign the time signal to the provided digital measurement data, a searching unit configured to examine the provided digital measurement data and/or first derived data based on the provided digital measurement data for the occurrence of one or more predetermined events, in order to take the detection of the occurrence of one or more predetermined events as a basis for generating corresponding event data based on the digital measurement data and/or on the first derived data of the event or events, a second logic unit configured to provide the event data and/or second derived data based on the event data with a timestamp, in order therefore to generate payload data, wherein the timestamp is based on a combination of the synchronized time provided by the first clock and the time signal assigned to the digital measurement data of the event or events, wherein the communication interface is configured to send the generated payload data via the communication network. a second clock, which is configured to take a provision signal supplied to the second clock by the measurement converter as a basis for generating a time signal, wherein the second clock is furthermore configured to prompt the first clock to periodically provide the synchronized time, a first logic unit configured to assign the time signal to the provided digital measurement data, a searching unit configured to examine the provided digital measurement data and/or first derived data based on the provided digital measurement data for the occurrence of one or more predetermined events, in order to take the detection of the occurrence of one or more predetermined events as a basis for generating corresponding event data based on the digital measurement data and/or on the first derived data of the event or events, a second logic unit configured to provide the event data and/or second derived data based on the event data with a timestamp, in order therefore to generate payload data, wherein the timestamp is based on a combination of the synchronized time provided by the first clock and the time signal assigned to the digital measurement data of the event or events, wherein the communication interface is configured to send the generated payload data via the communication network.