Short-delay circuit breaker and tripping loop and operating mechanism thereof

A technology of operating mechanism and circuit breaker, which is applied in the direction of protection switch operation/release mechanism, etc., and can solve problems such as voltage fluctuation of opening circuit

Inactive Publication Date: 2017-08-04
PINGGAO GRP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a short-time-delay circuit breaker, its opening circuit and operating mechanism, which are used to solve the problem of voltage fluctuation in the opening circuit when controlling the opening action of the circuit breaker

Method used

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  • Short-delay circuit breaker and tripping loop and operating mechanism thereof
  • Short-delay circuit breaker and tripping loop and operating mechanism thereof
  • Short-delay circuit breaker and tripping loop and operating mechanism thereof

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Embodiment Construction

[0029] The invention provides a short-time-delay circuit breaker, its opening circuit and an operating mechanism, which are used to solve the problem of voltage fluctuation in the opening circuit when controlling the opening action of the circuit breaker.

[0030] An operating mechanism for a short-time-delay circuit breaker, comprising a switch-off circuit; the switch-off circuit is provided with a power supply and a circuit breaker switch-off electromagnetic coil in series; A current-limiting resistor; the first current-limiting resistor is connected in parallel with an auxiliary switch that is closed when the circuit breaker is opened and opened after the opening action is completed.

[0031] The invention provides a short-delay circuit breaker operating mechanism, the first current-limiting resistor is connected in parallel with an auxiliary switch, and when the circuit breaker opens, the auxiliary switch is controlled to close, and the voltage at both ends of the circuit b...

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Abstract

The invention provides a short-time-delay circuit breaker and its opening circuit and operating mechanism. The operating mechanism includes an opening circuit. There is a first current-limiting resistor used to reduce the working current of the opening electromagnetic coil; the first current-limiting resistor is connected in parallel with an auxiliary switch that is closed when the circuit breaker is in the opening action and is turned off after the opening action is completed. In the technical solution provided by the present invention, the auxiliary switch is connected in parallel with the first current-limiting resistor. When the circuit breaker opens, the auxiliary switch is controlled to close. At this time, the voltage at both ends of the circuit breaker electromagnetic coil is higher than its rated voltage, and the circuit breaker can Quickly act to complete the opening; then turn off the auxiliary switch, at this time the first current limiting resistor is connected to the opening circuit to reduce the current in the circuit. Since both the first current-limiting resistor and the auxiliary switch are non-energy storage components, voltage fluctuations in the opening circuit will not be caused during switching.

Description

technical field [0001] The invention belongs to the technical field of circuit breaker control, and in particular relates to a short-time-delay circuit breaker and its opening circuit and operating mechanism. Background technique [0002] The fault removal time of the conventional substation is the action time of the protection device itself + the opening time of the circuit breaker; the fault removal time of the intelligent substation is the sampling time of the merging unit + the action time of the protection device + the action time of the intelligent terminal + the opening time of the circuit breaker. It can be seen that due to the addition of the two links of the merging unit and the intelligent terminal in the smart substation, the action speed of the whole group of protection devices is theoretically slower than that of the conventional substation under the condition that the protection principle remains unchanged. However, since the safe and reliable operation of the...

Claims

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Application Information

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IPC IPC(8): H01H71/24
CPCH01H71/24
Inventor 高群伟庞永鹏张一茗谷君李少华宋亚凯张文涛闻宇姚永其金光耀马和科
Owner PINGGAO GRP
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