| 摘要 |
A switching circuit in the form of a hybrid power relay comprising a semiconductor switch (11) and a relay (12) connected in parallel. Both the semiconductor switch (11) and relay contact (12) are actuated by respective transistor switching circuits having a common switching control input (19). However, the closing of the relay is delayed momentarily relative to the closing of the semiconductor switch (11), and the switching off of the semiconductor switch (11) is delayed momentarily after the opening of the relay (12). The staggered switching ensures that the relay does not switch high currents at high voltages, thereby eliminating contact flashing and burning.
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