| 摘要 |
The high-voltage direct-voltage source is composed of a bank of high-voltage capacitors and a charging circuit for charging the capacitors. A monitoring unit is connected in parallel with at least one of the high-voltage capacitors. After a predetermined limit value of the charging voltage has been exceeded, this monitoring unit emits a signal to a control device of the charging circuit preventing the further charging of the bank. The input of the monitoring unit is formed by a resistive voltage divider comprising a high-voltage-side and a low-voltage-side resistor. A high-voltage direct-voltage source is to be created in which a dielectric overloading of the high-voltage capacitors can be avoided in a simple manner which is insensitive to electric disturbances. This is achieved by the fact that the high-voltage-side resistor of the resistive voltage divider consists at least partially of non-linear voltage-dependent resistance material. Such a high-voltage direct-voltage source can be used, for example, in high-voltage direct-voltage transmission systems or in circuits for the synthetic testing of high-voltage circuit breakers. |
