A voltage-loss delayer
A delayer and delay relay technology, applied in the field of power electronics, can solve problems such as instantaneous voltage fluctuations, power grid voltage drops, and malfunctions, and achieve the effects of ensuring continuity, simple structure, and stable performance
Active Publication Date: 2018-03-16
深圳市盛德兰电气有限公司
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Problems solved by technology
[0002] In the existing technology, the power system inevitably has instantaneous voltage fluctuations, flicker, and instantaneous power outages. For example, when a large motor starts, the grid voltage drops instantaneously; ;In these cases, the low-voltage incoming line circuit breaker equipped with loss of voltage coil protection will trip due to loss of voltage
The tripping in the above cases belongs to the malfunction of the circuit breaker due to the sudden drop or loss of the grid voltage
Method used
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[0015] In order to better understand the technical solutions of the present invention, the embodiments provided by the present invention will be described in detail below in conjunction with the accompanying drawings.
[0016] An embodiment of the present invention provides a voltage-loss delayer, which includes: a power input port, the output end of the power input port is connected to the input end of the bridge rectification module and the input end of the DC power supply module, and the output end of the bridge rectification module The terminal is connected to the collector terminal of the switching transistor, and the emitter terminal of the switching transistor is connected to the positive pole of the high-voltage capacitor;
[0017] The negative pole of the high-voltage capacitor is connected to one end of the voltage-loss delay relay, the other end of the voltage-loss delay relay is connected to the output end of the first drive circuit, and the input end of the first d...
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The invention provides a voltage loss delay device, comprising: a power input port, the power input port is connected to a bridge rectifier module and a DC power supply module, the bridge rectifier module is connected to a switch transistor, the switch transistor is connected to a high-voltage capacitor; the high-voltage capacitor is connected to a voltage loss delay relay , the voltage loss delay relay is connected to the first drive circuit, the first drive circuit is connected to the counting circuit, the counting circuit is connected to the low-voltage capacitor, and the low-voltage capacitor is connected to the DC power module; the DC power module is respectively connected to the power-on delay circuit and the second drive circuit, and the second The driving circuit is respectively connected with the power-on delay circuit and the power-on delay relay, the power-on delay relay is connected with the output port, and the output end of the voltage-loss delay relay is connected with the output port. In order to ensure that the circuit breaker will not malfunction due to sudden fluctuation of grid voltage or instantaneous power failure within 3-5 seconds to ensure the continuity and reliability of power supply.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a voltage loss delayer. Background technique [0002] In the existing technology, the power system inevitably has instantaneous voltage fluctuations, flicker, and instantaneous power outages. For example, when a large motor starts, the grid voltage drops instantaneously; ; In these cases, the low-voltage incoming line circuit breaker equipped with loss of voltage coil protection will trip due to loss of voltage. The tripping in the above cases belongs to the malfunction of the circuit breaker caused by the sudden drop or loss of the grid voltage. Contents of the invention [0003] The invention provides a voltage-loss delayer to ensure that the circuit breaker will not malfunction within 3-5 seconds due to sudden fluctuations in grid voltage or instantaneous power failure, thereby ensuring the continuity and reliability of power supply. [0004] In order to achieve ...
Claims
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IPC IPC(8): H02H3/247
Inventor 刘宇新钟日林温志华
Owner 深圳市盛德兰电气有限公司