TH17461A - "Circuit breaker" - Google Patents

Abstract

A circuit breaker that will operate in the event of a wrong connection of the power transmission line. Improving safety The contact 3, which is separated and tangled by the drive mechanism 4, is inserted into the main current path between the power connector 1 and the load connector 2. A neutral wire potential 10 is provided between the legs of the primary path. The paths in response to the potential of these neutral lines 10 will have a series circuit containing the energy coil 12 and thyristor SCR1, while the resistor R2, capacitor C1 and diode D2 are connected in parallel. Straddling gate And the cathode of the thyristor SCR1.In addition, resistor R2 is connected through the zener diode ZD to the end of the wire. At the neutral of the passage of the primary current N in the event of a connection Of the transmission line to the power connector 1 wrong Will be created between the N ends on the neutral wire side. And at the point of connection to the ground terminal 7, with the results as follows, the Zener diode ZD will pass the current to open (ON) thyristor SCR1 and separate contact 3 from each other.

Claims (3)

1. A circuit breaker that contains Section of the power connector to connect to the transmission line. Consisting of a voltage or power cable and a neutral wire By the aforementioned power connector Contains a connector of the cable for connection. With such power cord And the connector of the neutral wire To connect to such neutral wire The part of the connector to the load to connect to the load. The passage of the main current, voltage line And the neutral wire extends from the connector of the wire The voltage and the neutral wire respectively to the section of the aforementioned load-resistant terminals. Passage of the stream Each corridor has a contact placed in it and a drive mechanism which can be operated to separate the two such contacts. To interrupt The passage of such primary currents when one of the currents resulting from a short circuit and an overload current Was detected to flow through the passage of the main stream Where the neutral line voltage response path is provided to measure the Differences in voltages between the primary current corridors of such neutral wires At the point where the offset from the said contact to the said load terminal and the connection to the earth terminal For connection to the external ground, in such a way that the propulsion mechanism is triggered In order to separate the corridor contact of Such mainstream lines To conduct the primary current of the neutral wire When the difference of The measured pressure is greater than the rated value. 2.Circuit-breaker as stated in claim 1, where the excitation coil is used to actuate the thrusters. They are connected in series with the switch between the passage of the primary current of the voltage line at the offset point from the contact to the section of the load terminal. And the terminal of the said grounding connector The switch will be turned ON when the voltage difference During the passage of the primary current of the said neutral line at the offset point from the said contact Directed towards the aforementioned load connector And the connector with such down-going connector is greater than the rated value 3. A circuit breaker that contains Part of the power connector to connect to a transmission line consisting of Voltage or neutral wires and cables By the episode of the aforementioned power connector Contains a connector of the cable for Connected to the said wire and the neutral connector. To connect to the said neutral wire The section of the load connector to connect the load. The passage of the primary current, the voltage line and the neutral line extending from its connector Such a neutral voltage line and a neutral wire, respectively, to the section of the terminal with the aforementioned load, each primary current passageway with a contact placed in it and a current transformer with zero phase. This can be performed to measure the leakage current, such as the current caused by a short circuit. Or leakage current And provides an output when the said leakage current is detected and the drive mechanism which separates the two such contacts. To interrupt the passage of the mainstream Such as in response to the output of such a phase-centered detector. Where the neutral line voltage response path is provided for measurement. Voltage potential difference During the passage of the primary current of the said neutral line at the offset point from the said contact Directed towards the aforementioned load connector And connector to earth terminal for connection to the external earthing terminal in this way Will provide a simulated or artificial leakage current To stimulate the drive mechanism to separate the contacts when the aforementioned measured pressure potential difference is greater than a given value.