Residual current operated circuit breaker circuit with self-checking function
A technology of residual current and self-test circuit, which is applied in the direction of circuit devices, emergency protection circuit devices, emergency protection devices with automatic disconnection, etc., can solve problems such as electric shock hazards, and achieve the effect of ensuring the safety of equipment and electricity use
Pending Publication Date: 2020-08-11
中欧电气有限公司
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Problems solved by technology
However, the actual situation is that few technical personnel will actively conduct leakage detection operations on the circuit breaker on a regular basis, and if the circuit breaker itself leaks due to a fault, manual operation may easily cause electric shock hazards
Method used
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[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0055] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0056] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0057] For a residual current operated circuit breaker circuit with self-test function provided by the embodimen...
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The invention discloses a residual current operated circuit breaker circuit with a self-checking function. The circuit comprises a power supply circuit, an operational amplifier input and output circuit, a clock circuit, an LED indication circuit, an opening self-check circuit, a silicon controlled rectifier loop detection circuit, a timer reset circuit, an enabling self-check circuit and a driving switch tripping circuit, wherein the power supply circuit, the operational amplifier input and output circuit, the clock circuit and the LED indication circuit are respectively connected with a specified pin of a main control chip, the opening self-checking circuit is connected with a specified pin of the main control chip and is connected with an external power supply and the power supply circuit, the silicon controlled rectifier loop detection circuit is connected with a specified pin of the main control chip and is connected with the timer reset circuit, the timer reset circuit is connected with a specified pin of the main control chip and is connected with the driving switch tripping circuit, the enabling self-checking circuit is connected with a specified pin of the main control chip, the driving switch tripping circuit is connected with a specified pin of the main control chip and is connected with the power supply circuit, and the power supply circuit is connected with the external power supply.
Description
technical field [0001] The invention relates to a circuit breaker control circuit, in particular to a residual current operated circuit breaker circuit with self-checking function. Background technique [0002] The residual current operated circuit breaker is an important protection device in the low-voltage power distribution system to prevent leakage damage of electrical equipment. However, if the residual current operated circuit breaker itself fails, it will not be able to provide leakage protection. The existing method for checking whether the leakage protection function of the residual current operated circuit breaker is normal and effective is to test the ability of the circuit breaker to respond to ground faults by manually operating a test button on the circuit breaker. However, the actual situation is that few technical personnel will actively conduct leakage detection operations on circuit breakers on a regular basis, and if the circuit breaker itself leaks due t...
Claims
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Login to View More IPC IPC(8): H02H3/32H02H3/02H02H3/04H02H1/00
CPCH02H1/0007H02H3/021H02H3/04H02H3/32
Inventor 李力军包启树包志勇
Owner 中欧电气有限公司