Residual-current circuit breaker
A residual current circuit breaker having a core-balance current transformer for detecting a residual current, wherein a secondary winding is arranged on a core of the core-balance element transformer, wherein the residual current circuit breaker has an AC measurement arrangement and a DC measurement arrangement, wherein the AC and DC measurement arrangements are designed to operate simultaneously and in parallel.
1. A residual-current circuit breaker, comprising:
a summation current transformer configured to detect residual currents;
a secondary winding arranged on a core of the summation current transformer;
an alternating-current measuring arrangement; and
a direct-current measuring arrangement,
wherein the alternating-current measuring arrangement and the direct-current measuring arrangement are configured to operate in parallel,
wherein a second contact point of the secondary winding is circuitry-wise connected to the ground by way of a first resistor, and
wherein a first input of a differential amplifier is connected circuitry-wise to a first contact point of the secondary winding and a second input of the differential amplifier is connected circuitry-wise to the second contact point of the secondary winding.
2. The residual-current circuit breaker of claim 1 , wherein the alternating-current measuring arrangement and the direct-current measuring arrangement are connected circuitry-wise to the secondary winding without a breaker.
3. The residual-current circuit breaker of claim 1 , wherein the direct-current measuring arrangement includes an oscillator unit, for specifiable magnetization of the core of the summation current transformer.
4. The residual-current circuit breaker of claim 3 , wherein the oscillator unit is at least indirectly connected circuitry-wise to a first contact point of the secondary winding.
5. The residual-current circuit breaker of claim 1 , wherein the alternating-current measuring arrangement and the direct-current measuring arrangement are circuitry-wise at least indirectly connected to a first contact point of the secondary winding and the second contact point of the secondary winding.
6. The residual-current circuit breaker of claim 1 , wherein an output of the differential amplifier is connected at least indirectly to a first analog/digital converter.
7. The residual-current circuit breaker of claim 1 , wherein an output of the differential amplifier is connected to a second analog/digital converter by way of a synchronous detector and an integrator.
8. The residual-current circuit breaker of claim 1 , wherein the alternating-current measuring arrangement and the direct-current measuring arrangement comprise a microprocessor.
9. The residual-current circuit breaker of claim 7 , wherein the alternating-current measuring arrangement and the direct-current measuring arrangement comprise a microprocessor,
wherein an output of the differential amplifier is connected at least indirectly to a first analog/digital converter, and
wherein at least one of the first analog/digital converter and the second analog/digital converter are constructed as part of the microprocessor.
10. The residual-current circuit breaker of claim 1 , wherein the direct-current measuring arrangement includes an oscillator unit, for the specifiable, non-linear magnetization of the core of the summation current transformer.
11. The residual-current circuit breaker of claim 1 , wherein an output of the differential amplifier is connected directly to a first analog/digital converter.
12. A residual-current circuit breaker, comprising:
a summation current transformer configured to detect residual currents;
a secondary winding arranged on a core of the summation current transformer;
an alternating-current measuring arrangement; and
a direct-current measuring arrangement,
wherein the alternating-current measuring arrangement and the direct-current measuring arrangement are configured to operate in parallel,
wherein a second contact point of the secondary winding is circuitry-wise connected to the ground by way of a first resistor,
wherein a first input of a differential amplifier is connected circuitry-wise to a first contact point of the secondary winding and a second input of the differential amplifier is connected circuitry-wise to the second contact point of the secondary winding, and
wherein an output of the differential amplifier is connected at least indirectly to a first analog/digital converter.
13. The residual-current circuit breaker of claim 12 , wherein the alternating-current measuring arrangement and the direct-current measuring arrangement are connected circuitry-wise to the secondary winding without a breaker.
14. The residual-current circuit breaker of claim 12 , wherein the direct-current measuring arrangement includes an oscillator unit, for specifiable magnetization of the core of the summation current transformer.
15. The residual-current circuit breaker of claim 14 , wherein the oscillator unit is at least indirectly connected circuitry-wise to a first contact point of the secondary winding.
16. The residual-current circuit breaker of claim 12 , wherein the alternating-current measuring arrangement and the direct-current measuring arrangement are circuitry-wise at least indirectly connected to a first contact point of the secondary winding and the second contact point of the secondary winding.
17. A residual-current circuit breaker, comprising:
a summation current transformer configured to detect residual currents;
a secondary winding arranged on a core of the summation current transformer;
an alternating-current measuring arrangement; and
a direct-current measuring arrangement,
wherein the alternating-current measuring arrangement and the direct-current measuring arrangement are configured to operate in parallel,
wherein a second contact point of the secondary winding is circuitry-wise connected to the ground by way of a first resistor,
wherein a first input of a differential amplifier is connected circuitry-wise to a first contact point of the secondary winding and a second input of the differential amplifier is connected circuitry-wise to the second contact point of the secondary winding, and
wherein an output of the differential amplifier is connected to a second analog/digital converter by way of a synchronous detector and an integrator.
18. The residual-current circuit breaker of claim 17 , wherein the alternating-current measuring arrangement and the direct-current measuring arrangement are connected circuitry-wise to the secondary winding without a breaker.
19. The residual-current circuit breaker of claim 17 , wherein the direct-current measuring arrangement includes an oscillator unit, for specifiable magnetization of the core of the summation current transformer.
20. The residual-current circuit breaker of claim 19 , wherein the oscillator unit is at least indirectly connected circuitry-wise to a first contact point of the secondary winding.