Measuring arrangement for measuring an electric current in the high-current range

Measuring arrangement for measuring an electric current in a high-current range, comprising:

• a) a low-resistance current sense resistor for current measurement in accordance with the four-wire technology, with
• a1) a first connecting part made of a conductor material for introducing the electric current to be measured into the current sense resistor,
• a2) a second connecting part made of a conductor material for conducting the electric current to be measured out of the current-measuring resistor, and
• a3) a resistor element made of a resistance material, the resistor element being electrically connected between the first terminal part and the second terminal part and the current to be measured flowing through it,
• b) a structurally integrated measuring circuit, the measuring circuit measuring the electrical voltage which drops across the resistor element,
• c) a plurality of pairs of voltage taps for measuring the electric voltage falling across the resistor element, the pairs of voltage taps being connected to the measuring circuit,
• d) a first busbar connection made of a conductive material for electrical and mechanical connection to a first busbar, the first busbar connection being electrically connected to the first connecting part of the current sense resistor, and
• e) a second busbar connection made of a conductor material for electrical and mechanical connection to a second busbar, the second busbar connection being electrically connected to the second connecting part of the current sense resistor, wherein
• f) the first busbar connection has a plurality of parallel connecting plates which are arranged one above the other and consist of a conductor material, and
• g) the second busbar connection has a plurality of parallel connecting plates which are arranged one above the other and are made of a conductor material.

Measuring arrangement for measuring an electric current in a high-current range, comprising:

• a) a low-resistance current sense resistor for current measurement in accordance with the four-wire technology, with
• a1) a first connecting part made of a conductor material for introducing the electric current to be measured into the current sense resistor,
• a2) a second connecting part made of a conductor material for conducting the electric current to be measured out of the current-measuring resistor, and
• a3) a resistor element made of a resistance material, the resistor element being electrically connected between the first terminal part and the second terminal part and the current to be measured flowing through it,
• b) a structurally integrated measuring circuit, the measuring circuit measuring the electrical voltage which drops across the resistor element,
• c) a plurality of pairs of voltage taps for measuring the electric voltage falling across the resistor element, the pairs of voltage taps being connected to the measuring circuit,
• d) a first busbar connection made of a conductive material for electrical and mechanical connection to a first busbar, the first busbar connection being electrically connected to the first connecting part of the current sense resistor, and
• e) a second busbar connection made of a conductor material for electrical and mechanical connection to a second busbar, the second busbar connection being electrically connected to the second connecting part of the current sense resistor, wherein
• f) at least one temperature sensor is provided for temperature measurement at the current sense resistor,
• g) the measuring circuit is connected to the temperature sensor,
• h) the current sense resistor has a temperature-dependent resistance value, and
• i) the measuring circuit compensates the temperature dependence of the resistance value in accordance with the temperature measured by the temperature sensor.

Measuring arrangement for measuring an electric current in a high-current range, comprising:

• a) a low-resistance current sense resistor for current measurement in accordance with the four-wire technology, with
• a1) a first connecting part made of a conductor material for introducing the electric current to be measured into the current sense resistor,
• a2) a second connecting part made of a conductor material for conducting the electric current to be measured out of the current-measuring resistor, and
• a3) a resistor element made of a resistance material, the resistor element being electrically connected between the first terminal part and the second terminal part and the current to be measured flowing through it,
• b) a structurally integrated measuring circuit, the measuring circuit measuring the electrical voltage which drops across the resistor element,
• c) a plurality of pairs of voltage taps for measuring the electric voltage falling across the resistor element, the pairs of voltage taps being connected to the measuring circuit,
• d) a first busbar connection made of a conductive material for electrical and mechanical connection to a first busbar, the first busbar connection being electrically connected to the first connecting part of the current sense resistor, and
• e) a second busbar connection made of a conductor material for electrical and mechanical connection to a second busbar, the second busbar connection being electrically connected to the second connecting part of the current sense resistor, wherein
• f) the resistor element of the current sense resistor has a specific thermoelectric force which generates a specific thermoelectric voltage in the event of a temperature difference between the resistor element on the one hand and the connecting parts on the other hand, and
• g) a compensating element is provided for compensating the thermoelectric voltage which drops across the resistor element,
• h) the compensating element is thermally connected to the two connecting parts and is thus exposed to the same temperature differences as the resistor element,
• i) the compensating element generates a specific thermoelectric voltage in the event of a temperature difference between the compensating element on the one hand and the connecting parts on the other hand, and
• j) the compensating element and the resistor element are electrically connected in series in a measuring circuit for voltage measuring and are connected to the measuring circuit so that the thermoelectric voltages of the resistor element on the one hand and of the compensating element on the other hand at least partially compensate each other.

Measuring arrangement for measuring an electric current in a high-current range, comprising:

• a) a low-resistance current sense resistor for current measurement in accordance with the four-wire technology, with
• a1) a first connecting part made of a conductor material for introducing the electric current to be measured into the current sense resistor,
• a2) a second connecting part made of a conductor material for conducting the electric current to be measured out of the current-measuring resistor, and
• a3) a resistor element made of a resistance material, the resistor element being electrically connected between the first terminal part and the second terminal part and the current to be measured flowing through it,
• b) a structurally integrated measuring circuit, the measuring circuit measuring the electrical voltage which drops across the resistor element,
• c) a plurality of pairs of voltage taps for measuring the electric voltage falling across the resistor element, the pairs of voltage taps being connected to the measuring circuit,
• d) a first busbar connection made of a conductive material for electrical and mechanical connection to a first busbar, the first busbar connection being electrically connected to the first connecting part of the current sense resistor, and
• e) a second busbar connection made of a conductor material for electrical and mechanical connection to a second busbar, the second busbar connection being electrically connected to the second connecting part of the current sense resistor, wherein
• f) for measuring the temperature difference across the resistor element, a thermocouple is provided for the purpose of computationally compensating the thermoelectric voltage which arises over the resistor element, and
• g) the measuring circuit is connected to the thermocouple.

Measuring arrangement for measuring an electric current in a high-current range, comprising:

• a) a low-resistance current sense resistor for current measurement in accordance with the four-wire technology, with
• a1) a first connecting part made of a conductor material for introducing the electric current to be measured into the current sense resistor,
• a2) a second connecting pal made of a conductor material for conducting the electric current to be measured out of the current-measuring resistor, and
• a3) a resistor element made of a resistance material, the resistor element being electrically connected between the first terminal part and the second terminal part and the current to be measured flowing through it,
• b) a structurally integrated measuring circuit, the measuring circuit measuring the electrical voltage which drops across the resistor element,
• c) a plurality of pairs of voltage taps for measuring the electric voltage falling across the resistor element, the pairs of voltage taps being connected to the measuring circuit,
• d) a first busbar connection made of a conductive material for electrical and mechanical connection to a first busbar, the first busbar connection being electrically connected to the first connecting part of the current sense resistor, and
• e) a second busbar connection made of a conductor material for electrical and mechanical connection to a second busbar, the second busbar connection being electrically connected to the second connecting part of the current sense resistor, wherein the measuring arrangement has a high-voltage transformer for supplying power to the measuring circuit.

Measuring arrangement for measuring an electric current in a high-current range, comprising:

• a) a low-resistance current sense resistor for current measurement in accordance with the four-wire technology, with
• a1) a first connecting part made of a conductor material for introducing the electric current to be measured into the current sense resistor,
• a2) a second connecting pail made of a conductor material for conducting the electric current to be measured out of the current-measuring resistor, and
• a3) a resistor element made of a resistance material, the resistor element being electrically connected between the first terminal part and the second terminal part and the current to be measured flowing through it,
• b) a structurally integrated measuring circuit, the measuring circuit measuring the electrical voltage which drops across the resistor element,
• c) a plurality of pairs of voltage taps for measuring the electric voltage falling across the resistor element, the pairs of voltage taps being connected to the measuring circuit,
• d) a first busbar connection made of a conductive material for electrical and mechanical connection to a first busbar, the first busbar connection being electrically connected to the first connecting part of the current sense resistor, and
• e) a second busbar connection made of a conductor material for electrical and mechanical connection to a second busbar, the second busbar connection being electrically connected to the second connecting part of the current sense resistor, wherein the measuring arrangement for supplying power to the measuring circuit has a photovoltaic cell which is irradiated by a light source for generating current via a light guide.

Measuring arrangement for measuring an electric current in a high-current range, comprising:

• a) a low-resistance current sense resistor for current measurement in accordance with the four-wire technology, with
• a1) a first connecting part made of a conductor material for introducing the electric current to be measured into the current sense resistor,
• a2) a second connecting part made of a conductor material for conducting the electric current to be measured out of the current-measuring resistor, and
• a3) a resistor element made of a resistance material, the resistor element being electrically connected between the first terminal part and the second terminal part and
• the current to be measured flowing through it,
• b) a structurally integrated measuring circuit, the measuring circuit measuring the electrical voltage which drops across the resistor element,
• c) a plurality of pairs of voltage taps for measuring the electric voltage falling across the resistor element, the pairs of voltage taps being connected to the measuring circuit,
• d) a first busbar connection made of a conductive material for electrical and mechanical connection to a first busbar, the first busbar connection being electrically connected to the first connecting part of the current sense resistor, and
• e) a second busbar connection made of a conductor material for electrical and mechanical connection to a second busbar, the second busbar connection being electrically connected to the second connecting part of the current sense resistor, wherein the measuring circuit has a first measuring channel with a first sampling rate for continuous current detection and a separate second measuring channel with a higher second sampling rate for overcurrent detection.