KR960027111A - Opening and closing operation method of distribution line and control device for line breaker - Google Patents

Abstract

The present invention transforms the high voltage on both sides of the switch into a low voltage and detects it at the power supply line voltage input unit and the load side line voltage input unit to be simultaneously input to the constant voltage charging unit, the phase detection unit and the phase detection unit, and is used as a power supply charging unit in the control power supply unit. When the phase mismatch is detected, the input suppression unit is controlled to suppress the switching of the switch, and the detection results of the phase detection unit and the phase detection unit are provided as status information to the remote controller, while the current transformer in the ground current input unit and the phase current input unit is limited. After detecting the current, it is converted into direct current by the current detection unit and input to the inrush suppression unit to determine whether it is an inrush suppression current, and a fault condition reset signal is output to reset the fault state of the fault detection unit. The current input to the fixed detector through the timing circuit In case of fixed current through the fault detection circuit, the failure status of manual mode and automatic mode is provided to the remote controller as status information. Therefore, when the phase is inconsistent, the input of the switch is suppressed and the presence or absence of the fault current is applied to the manual mode and automatic mode. It is to be able to operate according to the mode.

Description

Opening and closing operation method of distribution line and control device for line breaker

Since this is an open matter, no full text was included.

1 is a block diagram showing a schematic configuration of the present invention, Figure 2 is a circuit diagram showing the configuration of the voltage detecting means of the present invention.

Claims (4)

In the first phase detection unit 6 and the load side line voltage input unit 3, which recognizes an open state by whether or not the voltage detected by the power supply line voltage input unit 2 is lower than the off voltage level when the voltage is lowered. The second phase detection unit 7 which recognizes the open phase state by whether the detected voltage is lower than the off voltage level when the voltage is down, and the power line line voltage input unit 2 and the load side line voltage input unit 3 detected by A phase detector 8 for recognizing whether a phase mismatch occurs in each phase depending on whether the sum of the voltages of the power supply side and the load side of each phase is greater than the value of the reference square wave after changing the voltages into square waves, and the constant voltage charging unit as described above. (4), while operating the input drive unit 11 through the input control unit 10 while receiving the power and status information of the first and second image detection unit (6), (7) and phase detection unit (8) ) Or through the open control unit 12 The remote control unit 9 which operates the directional control unit 13 to open the switch 1 and the input drive unit by the output of the input control unit 10 if the phase mismatch is detected as the result of the phase detection unit 8 described above. An input suppressing unit 14 for disabling the operation of 11 and an inrush inhibiting unit 18 for allowing a steady current to flow after a time of inrush suppression when a current is initially applied through the current detecting unit 17; A fault detection unit 19 for determining whether a fixed current is greater than a reference ground voltage while receiving a current after the inrush inhibiting timing of the inrush current suppressing unit 18, and transmitting the current to the remote control unit 9; The fault reset unit 20 is configured to receive input of a fault reset signal through the current detector 17 of the fault reset unit 20 so as to recognize whether a fault current is input in an operating state of a manual reset circuit and an auto reset circuit connected in parallel. Line opening and closing of the distribution line characterized in that Mechanical controls. The monostable multivibrator (IC3) according to claim 1, wherein the input suppressing section (14) adds square waves of three phases (R, U), (S, V), and (T, W) by the phase detecting section (8). When the phase mismatch is detected as being larger than the square wave of the reference by being input to each of (IC4) (IC5), the line breaker control device of the distribution line which prevents the signal from being transmitted from the input control unit 10 to the input driving unit 11. . The fixed reset unit 20 includes a latch reset reset coil SR2 / R, LR3 / R, LR4 / R, and LR5 / R in parallel to the manual reset switch SW3. To the output of the monostable multivibrator (IC7), and latch latch reset coils (LR6 / R), (LR7 / R), (LR8 / R), and (LR9 / R) in parallel Set relay contacts LS1, LS2, LS3, LS4 of (18) and set relay contacts LS9, LS10, which are connected to one side of the AND gate A3 inputted as a fault recognition signal. (11) A switchgear control device for a distribution line that can recognize whether a failure occurs in a state of engaging (LS11) and (LS12). Detecting a proportional voltage value at the power supply line voltage input unit, which is the front end of the switchgear, and outputting a square wave to the voltage value and recognizing phase loss compared to the off voltage; and a load side line voltage input unit being the rear end of the switchgear. Detecting a voltage value proportional to the voltage, outputting the voltage value as a square wave, and comparing the off voltage with each other to detect an image phase, and comparing phases of the two square waves to recognize a phase mismatch state. And outputting the phase mismatching state to the remote control unit while transferring the phase and phase mismatch states to the remote control unit, and converting a current value input through the current transformer into a direct current and then applying a voltage at an initial stage to inhibit inrush. Delay input for a while, and when the voltage is applied for the first time after the failure detection, the inrush suppression operation is not performed. Opening and closing operation method of a distribution line, characterized in that driven by the steps to make. ※ Note: The disclosure is based on the initial application.