High speed automatic circuit breaker for protection
An automatic circuit breaker and circuit breaker technology, applied in emergency protection circuit devices, automatic disconnection emergency protection devices, and protection against overcurrent, etc., can solve problems such as failure to prevent fault propagation, and achieve high accuracy and low Loss, fast operation effect
Active Publication Date: 2009-04-22
SHINSUNG IND ELECTRIC +1
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Problems solved by technology
However, the cooperation with the back-up protection device is partially improved by the charging trip function, but it does not prevent the fault from propagating to the line, and the circuit breaker (CB) becomes useless
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[0033] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0034] Firstly, interruption in an alternating current circuit breaker means that since the current zero occurs every half cycle and the direction of the current is reversed, as many opportunities as possible are used for the current zero and the arc energy is effectively extinguished. Generally, alternating current circuit breakers are classified into one of the following: combined switches and fuses for air switching and oil circuit breakers, air circuit breakers, and magnetic circuit breakers, which differ from each other in terms of interruption theory and extinguishing medium . SF6 gas circuit breakers and vacuum circuit breakers are currently widely used.
[0035] SF6 gas circuit breaker is a circuit breaker using SF6 gas with good insulation performance and cooling performance. The vacuum circuit breaker is configured so that the contacts...
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Disclosed is a high speed automatic circuit breaker in which a Rogowski coil is integrated with a voltage sensor, a microprocessor processes voltage and current signals through an electronic transformer to reduce a size and costs, and an algorithm of counting, charging, and trip is realized for coordination with reclosers of a power substation and a line. The circuit breaker includes a main body to receive an electric power when fixed and moving contacts contacting each other, to operate the moving contact using an trip coil according to a trip control signal to trip, and to input the electric power according to an closing control signal, and a control unit to monitor current of a lead-in line and voltage to generate a control signal of controlling the main body. Thus, costs and installing space can be reduced and a customer fault is fundamentally prevented from being propagated to the line.
Description
technical field [0001] The present invention relates to a power receiving main circuit breaker installed inside an electrical consumer, and more particularly, to a high-speed automatic circuit breaker in which a circuit breaker, an electronic voltage transformer and an electronic current transformer are integrated to prevent Incidents in consumers propagate to power lines and reclosers on power lines that cooperate well with substation protection and protect equipment in consumers. Background technique [0002] Generally, relatively long power transmission lines are required in order to supply electrical power to electrical consumers. In this case, power loss due to resistance of the power transmission line inevitably occurs. To reduce power transmission losses, use thicker wires to reduce resistance or increase transmission line voltage. Thus, the transmission line voltage of a general generator is supplied up to about 66,000V, 154,000V and 345,000V as transmission line v...
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IPC IPC(8): H02H3/08
CPCH02H3/10H02H1/0007E06B5/16E05Y2900/134E05Y2800/409
Inventor 柳载识李正烈偰溢镐李柱亿曹玄镐
Owner SHINSUNG IND ELECTRIC