Circuit breakers for protecting electrical systems
A technology of power system and circuit breaker, which is applied in the direction of emergency protection circuit devices, components of protection switches, circuits, etc., and can solve the problems that circuit breakers cannot be protected from damage, heavy manual work, and reset of safety devices, etc.
Active Publication Date: 2017-11-24
GEFRAN
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Problems solved by technology
[0004] A disadvantage of said known safety device using a fuse is that it needs to be reset after a short circuit in the system, in particular by removing the defective fuse in order to replace it with a new one
Replacing the fuse described is usually a laborious manual task requiring the assistance of a skilled operator
[0005] Furthermore, circuit breakers with safety devices of fuses are not immune to damage that may be caused by transient phenomena that occur with short circuits
Method used
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[0014] refer to the Figure 1-Figure 2 , reference numeral 100 generally designates a circuit breaker for protecting a power system 10 from faults according to the present invention. in the Figure 1-Figure 2 In , the same or similar elements and components are referred to by the same reference numerals.
[0015] Circuit breaker 100 may be used to connect main power line LIN to one or more utilities or “loads” present in system 10 . It should be noted that the system 10 is preferably an industrial system, where figure 1 In the example of , the industrial system includes a single load LD powered by the bus line LIN.
[0016] Said load LD represents any industrial electrical load, for example a heating resistor of a furnace for processing metals, ceramics, glass or a resistor of an infrared lamp.
[0017] Furthermore, the circuit breaker 100 of the present invention may be adapted to be connected to a mains power line in alternating current of the single-phase type or a thre...
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The present invention relates to circuit breakers for protecting electrical power systems. A circuit breaker includes a semiconductor switching element having first and second electrical terminals and control terminals connected to a main power line. The switching element is controlled by an enable / disable control signal to switch between an open / closed state and a closed / open state for connecting or disconnecting at least one load to the power line. The circuit breaker includes a driver adapted to enable / disable the control signal. The circuit breaker includes a current limiting circuit operatively associated with the main power line and configured to send a first signal to the driver to disable the control signal to transition the switching element from the closed state to the open state upon detection of the fault current value a voltage regulating circuit, connected to the first and second electrical terminals, comprising: a dissipation device for storing residual electrical energy after switching the switching element from a closed state to an open state; and a device for limiting a fault voltage. The circuit breaker also includes overtemperature safety circuits for the first and second electrical terminals.
Description
technical field [0001] The present invention relates to a device for protecting electrical system circuits for industrial use. In particular, the invention relates to an electric circuit breaker for protecting a system against faults which may occur on the mains supply line, on the electrical load or on the circuit breaker. Background technique [0002] As is known, in modern power systems designed for industrial use, safety devices are provided to prevent faults or anomalies that could disrupt proper system operation. In fact, in the absence of said safety device, any anomaly and failure could damage the utility equipment (power plant installation) or "load" present in the system and connect / disconnect said load from the system of the breaker for both. In addition, dangerous situations may occur for persons using the utility device. [0003] Examples of safety devices for industrial power systems typically include fuses associated with thermal cutouts. A thermal circuit...
Claims
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IPC IPC(8): H02H3/08
CPCH01H71/123H01H83/10H02H3/085H02H5/048H02H7/222H02H3/20H02H3/38
Inventor 乔治·贝林尼乌戈·克劳丹尼
Owner GEFRAN