Circuit arrangement for high-voltage tests and high-voltage testing system
View Patent ↗A circuit configuration for high-voltage tests includes an AC voltage source and at least two circuit branches, each of which can be electrically connected to the AC voltage source. An electrical AC voltage can be applied to a test object by a first circuit branch, and an electrical DC voltage can be applied to the test object by a second circuit branch which rectifies an AC voltage.
1. A circuit configuration for high-voltage tests, the circuit configuration comprising:
an AC voltage source having a controllable transformer for producing AC voltages having different root mean square values;
at least first and second circuit branches each configured to be electrically connected to said AC voltage source;
said first circuit branch being configured to apply an electrical AC voltage to a test object; and
said second circuit branch rectifying an AC voltage and being configured to apply an electrical DC voltage to the test object.
2. The circuit configuration according to claim 1 , which further comprises at least one of a first switch for electrically connecting said first circuit branch to said AC voltage source or a second switch for electrically connecting said second circuit branch to said AC voltage source.
3. A high-voltage testing system, comprising a circuit configuration according to claim 1 for high-voltage tests.
4. The high-voltage testing system according to claim 3 , which further comprises a housing constructed to be filled with an insulation gas, said housing having a connecting flange for a test object, and said circuit configuration being disposed in said housing.
5. A circuit configuration for high-voltage tests, the circuit configuration comprising:
an AC voltage source;
at least first and second circuit branches each configured to be electrically connected to said AC voltage source;
said first circuit branch being configured to apply an electrical AC voltage to a test object;
said second circuit branch rectifying an AC voltage and being configured to apply an electrical DC voltage to the test object; and
at least one impulse voltage generator stage for producing a high-voltage pulse to be applied to a test object, said at least one impulse voltage generator stage having a storage capacitor and a spark gap for discharging said storage capacitor.
6. The circuit configuration according to claim 5 , wherein said at least one impulse voltage generator stage includes two impulse voltage generator stages connected in series.
7. The circuit configuration according to claim 5 , wherein said at least one impulse voltage generator stage includes a first impulse voltage generator stage having an actively triggerable first spark gap.
8. The circuit configuration according to claim 5 , which further comprises a chopping gap connected in parallel with the test object.
9. The circuit configuration according to claim 8 , wherein said chopping gap is actively triggerable.
10. The circuit configuration according to claim 5 , wherein said at least one impulse voltage generator stage is integrated in said second circuit branch.
11. The circuit configuration according to claim 5 , wherein:
said spark gap of said at least one impulse voltage generator stage includes spark gap electrodes having an electrode spacing being adjustable until said spark gap electrodes touch; and
a bypass line and a bypass switch are configured to bridge said spark gap of said at least one impulse voltage generator stage.
12. The circuit configuration according to claim 5 , wherein said spark gap of said at least one impulse voltage generator stage includes spark gap electrodes having an electrode spacing being adjustable until said spark gap electrodes touch.
13. The circuit configuration according to claim 5 , which further comprises a bypass line and a bypass switch configured to bridge said spark gap of said at least one impulse voltage generator stage.
14. A circuit configuration for high-voltage tests, the circuit configuration comprising:
an AC voltage source;
at least first and second circuit branches each configured to be electrically connected to said AC voltage source;
said first circuit branch being configured to apply an electrical AC voltage to a test object, said first circuit branch including a coupling capacitor and a first decoupling four-terminal network connected downstream of said coupling capacitor, for partial discharge measurements; and
said second circuit branch rectifying an AC voltage and being configured to apply an electrical DC voltage to the test object.
15. A circuit configuration for high-voltage tests, the circuit configuration comprising:
an AC voltage source;
at least first and second circuit branches each configured to be electrically connected to said AC voltage source;
said first circuit branch being configured to apply an electrical AC voltage to a test object; and
said second circuit branch rectifying an AC voltage and being configured to apply an electrical DC voltage to the test object, said second circuit branch including a Villard circuit element having a Villard charging capacitor and a Villard diode for increasing the DC voltage.
16. The circuit configuration according to claim 15 , wherein said second circuit branch includes a decoupling switch and a second decoupling four-terminal network to be connected to said Villard charging capacitor by said decoupling switch, for partial discharge measurements.