JPH0294218A - Remote controlled breaker function monitoring device - Google Patents

Abstract

PURPOSE:To make it possible to detect the functioning conditions of a remote controlled breaker regarding not only the on-off conditions but also tripped condition and abnormal condition by employing two photocouplers respectively provided with smoothing circuits and logic circuits. CONSTITUTION:The functioning of a load LO is controlled with a remote controlled breaker RCB. The functioning conditions including the on-off action setting, tripped condition, and abnormal condition of the remote controlled breaker RCB are detected with a functioning condition monitoring device connected to the breaker RCB via an AC power source PSI for control and the detected output is issued. The functioning condition monitoring device is constituted with a photocoupler PC1 for turning on and a photocoupler PC2 for turning off, both connected in reverse parallel via a power source PSI and respectively connected to smoothing circuits SC1, SC2 and Schmidt inverters G1, G2, and NAND gate G3 and separation switches S3 and S4 for obtaining a trip output.

Description

[Detailed Description of the Invention] [Field of Sedentary Work] This invention relates to a device for monitoring the operating status of a remote control breaker used at the end of a power distribution system, and particularly for monitoring not only the ON and OFF states of the remote control breaker but also the tripping state. The present invention relates to a remote control breaker operating state monitoring device that can also monitor the state and abnormal state.

[Conventional technology]

The fourth figure is a circuit diagram of a remote control breaker and a conventional device for monitoring the same. There is. The anode of the diode D1 and the cathode of the diode D2 are connected to the remote control V force production II current current #, P S
1 is connected to the pressure end, for example in FIG.

The switch S1 and the coil are connected to each other in H row. LO is a load, and is connected between the main power supply PS2 for member operation and the switch S2.

D3 and D4 are diodes, each having an anode and a cathode connected to the right end of the control AC 1 (Psi), and each having a cathode and an anode connected to the ON switch S3. K is connected to the coil via an OFF switch S4.

The cathode of the ON display LEDI is connected to the right end of the control AC @Ipsx via the resistor R1, and the anode of ρ is connected to the coil LK. OFF' display L
ED2 is connected in antiparallel to the ON display LEDI.

The conventional remote control breaker operating state monitoring device is configured as Km as described above, and Fig. 4 shows the remote control breaker RCB.
This shows the case where the switch is in the OFF state.

In this OFF state, the control current is connected to the control AC power supply Ps.
From the right end of i, resistor R1, OFF display LED2, coil L, switch Sl, and diode D2? a and flows to the left end of the control AC power supply PS1, so the OFF display L
ED2 is lit.

When the ON switch S3 is turned on to switch the remote control breaker RCB'10 from the FF state to the ON state.

The circuit PSI-D3-83-L-81-02-Psi is formed, the series circuit consisting of the resistor R1 and the 0FFi indicating LED2 is short-circuited, the OFF indicating LED2 is turned off, and the control current flowing through the coil LK is increased. Therefore, the switch 81 is switched to the diode DI side K, and the switch S2 is switched to the operating AC @yppszx11.

As a result, during the next half cycle of the control AC power supply Psi, the control current flows through the circuit Psi-DI-8l-L-LEDI-R.
1-PSI, the ON display LED lights up, and the load LO is energized from the operating AC power mPs2 via the switch S2. In this way, remote control breaker RCB is switched to the ON state.

When fiKOFF switch S4 is turned on, circuit Psi-
DI-81-L-34-D4-Psi is formed and ON
The display LED I is turned off (and the switches SIK and S2 are not returned to the positions shown in FIG. 4). As a result, the OFF display LED 2 is turned on and the load LO is deenergized.

[The problem that the invention attempts to solve]

As mentioned above, the conventional device has a remote control breaker of 0N1.
It only performs 0FF@+ control and displays the status on the LED, but cannot monitor the trip status of the remote control breaker, and cannot send output indicating the above-mentioned operating status of the remote control breaker to the central monitoring device of the power distribution system. There was a problem with this.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a remote control breaker operating state monitoring device that can monitor not only the ON state and OFF state of the remote control breaker, but also the trip state and abnormal state, as well as being able to send the operating state output to a central monitoring device. shall be.

[Means to solve the problem]

The remote control breaker operating state monitoring device according to the present invention includes:
A remote control breaker, a photocoupler connected to the control alternating current in a reverse array through a source, a smoothing circuit connected to each photocoupler, and a smoothing circuit connected to these smoothing circuits to control only the ON and OFF states of the remote control breaker. A logic circuit is provided for supplying an output indicating a trip condition or an abnormal condition to a central monitoring device.

[For production]

In this invention, the operating state of the remote control breaker is ON.
Depending on the state, a circuit consisting of an ON photocoupler, a smoothing circuit 16, and a logic circuit outputs a low-level ON output, and the O
The OFF circuit outputs a low level OFF output according to the FF state, and the NAND in the logic circuit outputs a low level OFF output according to the trip state.
The gate outputs a low-level trip output, and the OR gate in the logic circuit outputs a low-level abnormal output depending on the abnormal state. The exclusive OR gate produces a lone bell abnormal output.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to drawings with candy.

FIG. 1 is a circuit diagram showing a remote control breaker as an embodiment of a remote control breaker operating state monitoring device according to the present invention. In this embodiment, instead of the ON display LEDI,
A photocoupler Pct for N, a m-circuit SC1 and a Schmidt inverter G1 are used, and a LE for OFF is used.
In place of D2, a 7-off automatic coupler PC2, a smoothing circuit SC2, and a Schmidt inverter G2 are used.
A KNAND gate G3 is used to obtain the trip output.

The LED 3 in the ON photocoupler PC1 has its cathode connected to the above-mentioned resistor R1, its anode connected to the above-mentioned coil, and the phototransistor T.
1 has its collector connected to the direct current source DC, and its emitter connected to the smoothing circuit SCI. The H circuit SCI consists of two resistors R2: rε and R3 and one capacitor C1.
1 is connected between the emitter of the phototransistor TI and ground, and a resistor R3 is connected in parallel with this series circuit. Input side 1 of Schmidt inverter G1 is connected to the connection point of resistor R2 and capacitor CI.
It is illuminated.

Similarly, LED4 in the OFF coupler PC2 has its 7th node connected to the resistor R1 and its cathode connected to the coil LK, and the phototransistor T2 has its collector connected to the current DCK and its emitter connected to the coil LK. It is connected to the smoothing circuit SC2. Smoothing circuit S02
is two resistors R4 and R2H and one capacitor C
A series circuit consisting of a resistor R4 and a capacitor C2 is connected between the emitter of the phototransistor T2 and ground, and a resistor R5 is connected in parallel with this series circuit. The input side of the Schmitt inverter G2 is connected to the connection point between the resistor R4 and the capacitor C2.

Further, the input side of a NAND gate G3 is connected to the output side of the seven-unit inverters G1 and G2, and these Schmitt inverters G1 and G2 as well as the KNAND gate G3 form a logic circuit LCI.

The remote control breaker operating state monitoring device of the present invention is configured as described above, and sends operating state outputs shown in Table 1 below to a central monitoring device (not shown).

When the ON switch 83 is turned on to switch the remote control breaker RCB from the OFF state shown in FIG. 1 to the ON state, the switch 81 . S
2 or each diode Dl side, operating AC power supply PSZ
can be switched to the side. Then, the load LO is the switch S
2 from the operating AC power supply P82, and a control current flows through the LED3-R1-PS1 in the circuit Psi-DI-81-L-Pct. As a result, LED3
lights up and turns on phototransistor T1, so capacitor C1 is photovolted from 11itM, mDC, across phototransistor T1 and resistor R2. However, during the next half cycle of the control father charge CIIjtPS1, the LED3 is reverse biased and goes out, so the phototransistor T1 is also turned off, and the capacitor C1 is discharged through the resistors R2 and R3. In this way, since the control current of the remote control breaker RCB is the alternating current from the control AC power supply PSI, the signal for detecting the ON state of the remote control breaker RCB has a half-wave rectified waveform. When this half'tBLw current waveform is smoothed by the smoothing circuit SCI, the time constant of the smoothing circuit SCI (the resistance of the resistor R2) is (value + resistance value of resistor R3) X The capacitance of capacitor C1 is selected to be larger than 1/J.

However, j is the frequency of the control AC power supply Psi, and R 2 < R3. Therefore, in the ON state, the input side of the Schmitt inverter G1 is at H (high) level, so the As shown in Table 1, 01 output is L
(low) level, and the ONI:l-1 force is also L.

In this case, since the photocoupler PC2 does not operate, the input 1.11 of the Schmitt inverter G2 is at L, so both the 02 output and the OFF output are at H. History, NA
ND game) G3 has an L input and an H input, so it outputs an H trip output. In this way, the remote control breaker RCB turns O.
When in the N state, the remote control breaker operating state monitoring device supplies an L ON output to the central monitoring device.

Next, turn on the KOFF switch S4 to switch the remote control breaker RCB from ON to OFF.
Switches S1 and S2 are switched back to the position of FIG. 1, the load LO is deenergized and the control current is switched to the circuit Psi-R.
It flows through LED4-L-81-D2-Psi in 1-PC2, LIDD4 lights up and turns on phototransistor T2, and capacitor C2 in smoothing circuit SC2 has a time constant (R5 in R4) x C2>17j (however, R4 <R5
), the Schmidt inverter G2's human power of 11411 is HK.

Therefore, as shown in Table 1, 02 output and OF”F
The outputs are both KL, and the Gl output, ON output, and trip output are all H. In this manner, when the remote control breaker RC11 is in the OFF state, the remote control breaker operating state monitoring device supplies an L OFF output to the central monitoring device.

Furthermore, if the 5 remote control breaker RCB is in the trip state, the control current (this is 81 from Dl in the ON state)
It flows in the direction of L through the edge, and in the case of 0■IF state, it flows from the edge through Sl and flows in the direction of D2. ) does not flow, the photocouplers PCI# and PO2 do not operate together, and therefore the input terminals of Schmitt inverters G1 and G2 are both at KL, so the 01 output, ON output, and 02 output are output as shown in the i1 diagram. and OFF' outputs are all H, so the NAND gate G3 and, in turn, the remote control breaker operating state monitoring device supplies an L trip output to the central monitoring device.

FIG. 2 is a circuit diagram of a modified example in which a part of the logic circuit shown in FIG. 1 is changed. The logic circuit LC2 shown in FIG.
In addition to the Schmitt inverters G1 and G2 in Figure 1, and the NAND gate G3, an OR game (G4) is added which is connected in parallel with the NAND gate G3 and supplies an abnormal output representing an abnormal state of the remote control breaker RCB. Not too K. The truth table of this logic circuit LC2 is as shown in Table 2 below.

Table 2 If there is no need to distinguish between the trip output and the abnormal output in #@buried circuit LC2 in Figure 2, these two outputs should be combined into one.
For example, it is possible to combine these into an abnormal output.

Such an example is shown in FIG.

The logic circuit L03 shown in FIG.
(D game) An exclusive CR gate G5 is used in place of G3, and its truth table is as shown in Table 3 below.

Table 3 [Effects of the Invention] As explained in detail above, the present invention comprises a remote control breaker, a photocoupler connected in an inverted array via an AC power supply for controlling the same, and a smoothing circuit connected to each photocoupler. , connected to these flat 6r circuits to determine the ON and OFF states of the remote control breaker A+,! ? In addition, it is equipped with a logic circuit that supplies outputs indicating trip conditions and abnormal conditions to the central monitoring device, so that by sending outputs indicating the operating status of the remote control breaker to the central monitoring device of the power distribution system, terminals of the power distribution system can be This has the effect of enabling detailed monitoring.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a remote control breaker and an embodiment of the present invention, FIG. 2 is a circuit diagram showing a partial modification of the embodiment shown in FIG. 1, and FIG. 3 is a circuit diagram showing another modification. and FIG. 4 is a circuit diagram showing a remote control breaker and a conventional remote control breaker operating state monitoring device. In the figure, RCB is a remote control breaker, and PSL is a control AC 1! source, PCI and PO2 are photocouplers, SCI and SC2 are smoothing circuits, LC1 to LC3 are logic Jψ circuits, G1
and G2 are Schmitt inverters, G3 is a NAND gate, G4 is an OR gate, and G5 is an exclusive OR gate. In each figure, the same reference numerals represent the same or equivalent S portions. Tsuta 2 figure Helmet 3 figure G5-J [@'IOR Kenito trap 4 figure

Claims (1)

[Claims] A remote control breaker, photocouplers connected in antiparallel to each other via an AC power supply for controlling the same, and a smoothing circuit connected to each photocoupler, and a smoothing circuit connected to these smoothing circuits to control only the ON and OFF states of the remote control breaker. 1. A remote control breaker operating state monitoring device comprising: a logic circuit that supplies an output representing a trip state or an abnormal state to a central monitoring device.