| 摘要 |
An electronic remote control D.C. power control and overload circuit breaker for the cockpit controlled D.C. power system of an aircraft or the like. Electronic sensing of overcurrent conditions provides better accuracy, stability and reliability and easier adjustment or adaptation to specific applications. These are attained by using a combination of a shunt resistor in the D.C. line feeding a transient suppressing input bridge and an instrumentation amplifier with common mode rejection followed by a trip time delay network, a threshold comparator and logic and relay control circuitry, as well as supply voltage regulation plus secondary regulation of the comparator reference voltage. A remote cockpit unit affords control and indication. Modifications afford bidirectional sensing of the D.C. bus overload as well as different trip time delays for the two polarities of overload currents.
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