Undervoltage automatic protection circuit breaker with time-lag action function
A technology of automatic protection and delayed action, applied in the direction of automatic disconnection of emergency protection devices, emergency protection circuit devices, circuit devices, etc., can solve problems such as large losses of enterprises, non-compliance with technical safety standards, motor burnout, etc.
Inactive Publication Date: 2017-02-22
YIYANTANG YINGCHENG HEALTH SALT MFG
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Problems solved by technology
When starting the equipment again, the salt slurry deposited in the pump cavity and pipeline must be cleaned first, otherwise, the driving equipment will burn out the motor due to stalling and overloading, and the transient fault of the power grid will be derived into a permanent accident of production. Accidents generally take more than 12 hours and cause huge losses to the enterprise
However, if the "undervoltage automatic protection" function is cancelled, it does not meet the relevant technical safety standards.
Method used
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[0009] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.
[0010] figure 1 It is a circuit diagram of a specific embodiment of the undervoltage automatic protection circuit breaker with delay action function of the present invention. like figure 1 As shown, the undervoltage automatic protection circuit breaker with delay action function of the present invention includes a rectifier diode V, a first resistor R 1 , the second resistance R 2 , capacitor C and undervoltage release coil Q, where the first resistor R 1 The series circuit obtained in series with the capacitor C and the second resistor R 2 The series circuit obtained ...
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The invention discloses an undervoltage automatic protection circuit breaker with a time-lag action function. The undervoltage automatic protection circuit breaker comprises a rectifier diode, a first resistor, a second resistor, a capacitor and an undervoltage trip coil, wherein the rectifier diode, the first resistor, the second resistor and the capacitor form a half-wave rectifying circuit; the capacitor is charged when power supply voltage is a normal value; and the undervoltage trip coil is charged by the capacitor when the power supply voltage is undervoltage, so that time-lag action control is carried out on an undervoltage automatic protection function; the condition that the reaction of the undervoltage automatic protection circuit breaker is too sensitive in temporary no-voltage states of ''interference electricity'' and the like is avoided; and load equipment can continuously work.
Description
technical field [0001] The invention belongs to the technical field of circuit breakers, and more specifically relates to an undervoltage automatic protection circuit breaker with a delay action function. Background technique [0002] In the existing production process of salt chemical industry, the main power supply circuit breaker controlled by electric drive adopts AC 380 / 220V, all of which have the function of "undervoltage automatic protection". The circuit breaker is automatically disconnected to prevent the direct secondary start of the driving equipment after the power is received, and to avoid the motor burning due to the stalled and overloaded driving equipment. [0003] According to historical statistics, more than 95% of power grid faults are "shock power", that is, the phenomenon of "undervoltage" and "loss of voltage" due to flashover of power system lines. This phenomenon is temporary, and the general time interval is 5 seconds. Within, it will return to norm...
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IPC IPC(8): H02H3/247
CPCH02H3/247
Inventor 张红宇邓跃清
Owner YIYANTANG YINGCHENG HEALTH SALT MFG