KR930024244A - Relay automatic inspection method and device - Google Patents

Abstract

The present invention relates to a method for automatically checking a relay and a device thereof, and in the related art, by inputting a measurement value using a separate current source voltage source and checking the output of the relay after a predetermined time, the inspection procedure is not only complicated but also requires a lot of time for inspection. If the actual fault current was input during the inspection, there was no problem.

In view of this, in the present invention, a digital gate and a microprocessor are used, and a display unit, a mode setting unit, and a setting unit are added to configure a circuit. When the user selects a setting mode, a fault check is performed according to a program. When the high current is input during the check, the system immediately changes to the run mode and protects the real load system, making it easy to operate the check mode and coping with the fault current.

Description

Relay automatic inspection method and device

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

2 is a block diagram of the automatic inspection device of the relay of the present invention.

Claims (7)

When the overload detection signal is input, the trip signal generator 17 generates a trip signal, and the breakers CSW _{11 to} CSW ₁₃ are turned off by the trip signal of the trip signal generator 17 to turn off the three-phase power source U, Performing a voltage check unit 19 for blocking V and W, a current detecting unit 20 for detecting current when the breakers CSW _{11 to} CSW ₁₃ of the voltage blocking unit 19 are in an ON state Check mode setting section 15 for setting automatic time check (Mode 1), manual check (Mode 2) and input mode (Mode 3), and after the mode setting of the check mode setting section 15, Mode 2) The fault check setting unit 13 for setting the hearing value at the time of setting and the detection current of the current detecting unit 20 are calculated to output an overload detection signal to the trip signal generating unit 17 if the overcurrent is detected. The relay 11 for performing the fault check according to the setting mode of the setting unit 15 and the inspection at the time of setting the input mode (Mode 3) of the checking mode setting unit 15 A measurement value input unit 18 for inputting a set value to the relay 11, a fault display unit 16 for indicating a fault when a trip signal is generated according to the fault check of the relay 11, and the relay 11 And a memory (12) for storing an inspection state and a setting value, and an inspection state display unit (14) for alternately displaying a trip time and a setting value at the time of the failure inspection of the relay (11). 2. The relay 11 according to claim 1, wherein the relay 11 includes a system expansion unit 11-2 for receiving the output of the system expansion and measurement value input unit 18, and a current detection unit input through the system expansion unit 11-2. A voltage converter 11-3 for converting the output of the signal 20 into a voltage, a low pass filter 11-4 for removing a constant high frequency from the output of the voltage converter 11-3, and the low pass filter ( A / D converter 11-5 for converting the output of 11-4) into a digital signal, and an output of the A / D converter 11-5 is calculated to detect an overload, and trip signal generator 17 A microprocessor (11-1) for outputting an overload detection signal to < RTI ID = 0.0 >) < / RTI > and executing a check mode in accordance with a program when the check mode is executed. 2. The inspection mode setting unit (15) according to claim 1, wherein the inspection mode setting unit (15) includes an automatic inspection setting key (15-1) for selecting an automatic inspection mode (Mode 1) and a manual selection for a manual inspection mode (Mode 2). And a check mode selection key (15-2) and an input mode selection key (15-3) for selecting an input mode (Mode 3) using the measurement value input unit (18). The high value setting key (13-1) according to claim 1, wherein the fault check setting unit (13) sets the setting value up and down when the manual check selection key (15-2) of the check mode setting unit (15) is selected. ), And a lower value setting key 13-2 and a start key 15-3 which is executed after setting the checking modes (Mode 1 to Mode 3) in the checking mode setting unit 15. Auto check device. According to claim 1 or 2, the microprocessor (11-1) performs a check operation in accordance with the output of the check mode setting unit 15 and the fixed check setting unit 13 to generate a trip signal when a trip signal is generated. LED of 16) flashes, and when the inspection is completed, the setting value and trip time are displayed on the inspection status display unit 14, and the automatic inspection device of the relay, characterized in that configured to store the inspection contents in the memory 12 . The inspection function is divided into automatic inspection (Mode 1), manual inspection (Mode 2) and input mode (Mode 3), and after selecting a random mode and executing inspection, if the fault current is not determined, the sub-loop is checked and The counter operates to determine if there is a fault current if the tree time is not completed, and if the trip time is completed, displays the fault according to the inspection, and alternately displays the trip time and setting value. Automatic checking method of relay. The method according to claim 6, wherein when the inspection function is selected, a manual check (Mode 2) is discriminated if it is not an automatic check (Mode 1), an input mode (Mode 3) is determined if the check is not a mode (Mode 2), and the input mode is selected. An error message is displayed if not (Mode 3). ※ Note: The disclosure is based on the initial application.