JP2021016298A - Seismometric relay system - Google Patents

Abstract

To make it possible to grasp an interception factor of a switch unit when recovery operation is performed.SOLUTION: A seismometric relay system comprises: a switch unit 2 comprising an electric circuit switching mechanism 23; a detection unit 31 for detecting an earthquake's acceleration or seismic intensity; a determination unit 32 for outputting an interception signal to the switch unit when the detection unit detects an acceleration or seismic intensity equal to or larger than a predetermined level; a storage unit 33 for storing interception signal output information to the switch unit; and a display unit 34 for displaying the presence/absence of the interception signal output information in the storage unit at the time of the switch unit's recovery operation after the switch unit is intercepted.SELECTED DRAWING: Figure 1

Description

The present invention relates to a seismic relay system capable of detecting an earthquake.

As described in Patent Document 1, it is known that a seismic relay capable of detecting an earthquake is used to shut off the breaker at the time of earthquake detection. Some of the seismic relays can display that the seismic relay itself is operating and a warning display that is displayed only for a predetermined time after the occurrence of an earthquake. Such a seismic relay transmits a cutoff signal to a power distribution device such as a breaker after a lapse of a predetermined time from the occurrence of an earthquake to shut off the power distribution device.

JP 2015-177660

However, in the conventional technique, even if the power distribution device is shut off by the seismic relay, it is not possible to grasp the breaking factor of the breaker when the return operation is performed.

The inventor of this case tried to solve this problem by diligently examining this point. An object of the present invention is to make it possible to grasp the blocking factor of the opening / closing portion when the return operation is performed.

In order to solve the above problems, the following means will be adopted. The first means is an opening / closing unit provided with an electric circuit opening / closing mechanism, a detection unit that detects the acceleration or seismic intensity of an earthquake, and a detection unit that outputs a cutoff signal to the opening / closing unit when the detection unit detects acceleration or seismic intensity. A determination unit, a storage unit that stores cutoff signal output information to the opening / closing unit, and a display unit that displays the presence / absence of blocking signal output information in the storage unit when the opening / closing unit is restored after the opening / closing unit is cut off. It is a seismic relay system equipped with.

In the first means, the opening / closing part includes a primary side terminal part to which the system power supply is connected and a secondary side terminal part to which the load is connected, and the power supply part connected to the secondary side terminal part of the opening / closing part. Is preferably configured to supply power to the determination unit.

In the first means, it is preferable that the display unit has a configuration capable of displaying the operation signal of the opening / closing unit.

In the first means, one display unit may be configured to display a power supply display indicating the power supply status of the seismic relay and an operation display indicating the presence / absence of cutoff signal output information of the storage unit during the return operation. preferable.

In the first means, it is preferable that the opening / closing unit, the detection unit, the determination unit, the storage unit, and the display unit are housed in the same housing.

In the first means, it is preferable to have a configuration including a seismic relay having a detection unit, a determination unit, a storage unit, and a display unit formed in the same housing, and a breaker as an opening / closing unit.

In the present invention, it is possible to grasp the blocking factor of the opening / closing portion when the return operation is performed.

It is a block diagram of the seismic relay system of this embodiment. It is a perspective view of the seismic relay system which combined the seismic relay and the earth leakage breaker. It is a front view of the seismic relay system which combined the seismic relay and the earth leakage breaker. It is a front view of the distribution board which incorporated the seismic relay system. It is a perspective view of the mechanical display means. It is a schematic diagram of the internal structure of a mechanical display means. However, it represents a state in which a force for moving the plunger is generated by energizing the coil. It is a schematic diagram of the internal structure of a mechanical display means. However, this indicates a state in which the movement of the display unit is suppressed by the display holding unit after the energization of the coil is stopped.

A mode for carrying out the invention is shown below. As shown in FIG. 1, the seismic relay system 1 of the present embodiment includes an opening / closing unit 2 including an electric circuit opening / closing mechanism 23, and a detecting unit 31 for detecting the acceleration or seismic intensity of an earthquake. Further, a determination unit 32 that outputs a cutoff signal to the open / close unit 2 when the detection unit 31 detects an acceleration or seismic intensity equal to or higher than a predetermined value, a storage unit 33 that stores the cutoff signal output information to the open / close unit 2, and the open / close unit 2. After being cut off, it is provided with a display unit 34 that displays the presence / absence of the cutoff signal output information of the storage unit 33 when the opening / closing unit 2 returns. Therefore, even after the return operation, if the display unit 34 is checked, it is possible to grasp whether or not the opening / closing unit 2 has operated due to the operation of the determination unit 32.

The opening / closing unit 2 of the present embodiment includes a primary side terminal unit 28 to which a system power supply is connected and a secondary side terminal unit 29 to which a load is connected. Further, the power supply unit 38 connected to the secondary side terminal unit 29 of the opening / closing unit 2 supplies power to the determination unit 32. With such a configuration, when the opening / closing unit 2 is not operating, power is not supplied to the operation of each mechanical unit, so that it is possible to grasp that the opening / closing unit 2 is not operating. It will be possible. In the present embodiment, the power supply line 44 is interposed between the secondary side terminal portion 29 and the power supply terminal 43 connected to the power supply portion 38.

As can be understood from FIGS. 1 to 3, the seismic relay system 1 of the present embodiment includes a seismic relay 3 and an opening / closing unit 2. Further, the opening / closing portion 2 of the present embodiment is a breaker. Since the seismic relay system 1 of the present embodiment has a configuration including a seismic relay 3 in which the detection unit 31, the determination unit 32, the storage unit 33, and the display unit 34 are formed in the same housing, and a breaker, the existing breaker It can be used simply by attaching the seismic relay 3. Further, in the present embodiment, as shown in FIG. 4, the seismic relay system 1 is incorporated in the distribution board 9. Further, the seismic relay system 1 is connected to the main breaker of the distribution board 9, and when acceleration and / or seismic intensity is detected, the entire connected load can be cut off. The seismic relay system 1 may be connected to a part of the branch breaker.

In the present embodiment, the acceleration can be detected by the seismic sensor 312 that functions as the detection unit 31. In addition, the seismic intensity can be detected by the receiving unit 311 that functions as the detecting unit 31.

The seismic relay 3 of the present embodiment includes a reset button 35, a test button 36, and a display unit 34 on the front surface of the seismic relay 3. The reset button 35 can reset the state of the display unit 34 and the information of the storage unit 33 by operating the reset button 35 after detecting the earthquake and / or the acceleration until the automatic shutoff. Further, the test button 36 is a button used for testing whether or not the seismic relay 3 can transmit a cutoff signal to the breaker. The seismic relay 3 of the present embodiment includes a setting unit 37 capable of changing the cutoff time. In the present embodiment, the setting unit 37 can be switched in multiple stages, and the time from the detection of the earthquake and / or the acceleration to the shutoff operation can be determined by the selected setting. Further, the display unit 34 of the present embodiment is provided with a speaker 42 used for issuing an alarm.

The display unit 34 of the present embodiment has a "power supply display" that displays power supply to the seismic relay 3 itself, an "alarm display" that detects an earthquake with the seismic relay 3 and outputs an alarm within a predetermined time, and a seismic relay. It is possible to perform "operation display" to display when the cutoff signal output information indicating that the cutoff signal has been output from the determination unit 32 at the time of power restoration of 3 is stored in the storage unit 33. Although it is possible to provide three display units 34 so as to have a one-to-one correspondence with each of these displays, a power supply display indicating the power supply state of the seismic relay 3 and a shutoff of the storage unit 33 during the return operation are performed. If the operation display for displaying the presence / absence of signal output information is displayed by one display unit 34, it is not necessary to provide a plurality of display units 34, and a neat appearance can be obtained.

In the present embodiment, the power supply display, the operation display, and the alarm display are performed by one display unit 34, and the issue color is changed by the LED from the information of the storage unit 33 according to the state. For example, the power display is green, the alarm display is red, and the operation display is orange. In this embodiment, the operation display is displayed only for a predetermined time after the return operation, and then switched to the power display. In this way, since the display is changed according to the situation, the user can grasp the operating state. It should be noted that the present invention is not limited to such an embodiment, and a plurality of display units 34 may be provided.

In this embodiment, the seismic relay 3 is arranged adjacent to the side surface of the breaker. More specifically, a hook is provided on the side surface of the case 53 of the seismic relay 3 to lock it to the base portion of the breaker, and then the seismic relay 3 is adjacent to the side surface of the breaker by locking and integrating with the cover portion of the breaker. It is arranged. The seismic relay 3 may be attached to and detached from the breaker case 53.

In the seismic relay system 1 of the present embodiment, the display unit (leakage display button 27) of the breaker and the display unit 34 of the seismic relay 3 are arranged so as to be adjacent to the middle door of the distribution board 9 or the protective cover 45. ing. In the present embodiment, since the display unit of the breaker and the display unit 34 of the seismic relay 3 are formed at substantially the same height as the handle installation surface of the breaker, a neat appearance can be obtained.

The breaker of this embodiment is an earth leakage breaker 21, and internally includes a trip device 24 for trip operation of the electric circuit opening / closing mechanism 23. In this breaker, when an electric leakage is detected by the internal ZCT, the plunger operates by receiving a signal from the trip device 24 and exciting the coil, and the electric circuit opening / closing mechanism 23 in the breaker is operated to shut off the electric leakage breaker 21. Let me. When the seismic relay 3 operates, a cutoff signal is sent to the trip device 24 via the output unit 39, and the earth leakage breaker 21 operates. The breaker of the present embodiment is provided with a test button 26 like the seismic relay 3.

The tripping device 24 includes an electromagnetic solenoid that operates a movable iron core, a trigger lever incorporated in the tip of an armature, and the like. An external lead wire is connected to the electromagnetic solenoid, and when a trip command is given from the outside, the electromagnetic solenoid of the trip device 24 is excited to attract the armature. As a result, the trigger lever moves to release the lock of the electric circuit opening / closing mechanism 23, and the trip operation is performed. As a method of opening the electric circuit opening / closing mechanism 23, a pseudo electric leakage may be passed through the circuit of the breaker when a cutoff signal is transmitted to operate the trip device 24.

An earth leakage display button 27 is formed on the earth leakage breaker 21 of the present embodiment. When an electric leakage is detected and shut off, the electric leakage display button 27 is configured to protrude from the surface portion, so that it can be grasped that the electric leakage has caused the interruption. The earth leakage display button 27 protrudes from the surface even when a cutoff signal is transmitted from the seismic relay 3 and is cut off. Therefore, the cause of the interruption cannot be accurately grasped only by the earth leakage breaker 21. Therefore, it is necessary to display on the seismic relay 3, but in the present embodiment, it is possible to confirm the cause of interruption after the return operation on the display unit 34 of the seismic relay 3.

In the present embodiment, the display unit 34 of the seismic relay 3 and the display unit 34 of the earth leakage breaker 21 are formed, respectively. As shown in Table 1, since the state of the display unit 34 differs depending on each situation at the time of earthquake detection, earth leakage detection, and overcurrent detection, the display unit 34 at the time of shutting off the earth leakage breaker 21 and after the earth leakage breaker 21 is turned on. By checking the state of the display unit 34 of the seismic relay 3, it is possible to grasp the exact cause of the earth leakage breaker 21.

In the above-described embodiment, the display unit 34 uses LEDs, but it may be mechanically displayed. For example, it is possible that the determination unit 32 detects an earthquake and the button displays the state when a cutoff signal is transmitted. More specifically, as a mechanical display means, as shown in FIGS. 5 and 6, a configuration including an iron core plunger 52 having a colored tip, a case 53 into which the plunger 52 is inserted, and a coil 54 is provided. can do. In this mechanical display means, when acceleration and / or earthquake information is input, an output is output from the determination unit 32 in the seismic relay 3, so that a current flows through the coil 54, as shown in FIG. The plunger 52 is sucked or pushed out, and the position of the colored tip of the plunger 52 moves to switch the display. When the energization of the coil 54 is stopped, the plunger 52 tries to return to its original state, but by maintaining the display state by using the display holding portion 56 provided with the permanent magnet 55, the lock portion, etc., as shown in FIG. , It is possible to maintain the moved state by energizing. With such a configuration, the operation of the seismic relay 3 can be grasped even when the power is not supplied to the seismic relay 3 itself.

Further, unlike the above example, the seismic relay 3 is mounted in the earth leakage breaker 21, that is, the opening / closing unit 2, the detection unit 31, the determination unit 32, the storage unit 33, and the display unit 34 are housed in the same housing. It is also possible to do. In this case, since it is mounted in one device, the device itself can be made compact. Further, since the display unit 34 is displayed by one device, it is possible to easily determine whether the earth leakage breaker 21 is the cause of the interruption or the seismic relay 3 is the cause of the interruption. Therefore, it is possible for the display unit to display after determining all the factors with one display unit. For example, if the display unit can display the operation signal of the opening / closing unit 2, it is possible to grasp that the circuit has been cut off due to a factor of the opening / closing unit 2 itself such as electric leakage or overcurrent.

Although some embodiments have been described above focusing on one embodiment, the present invention is not limited to the above-described embodiment and can be various modes. For example, when an electric leakage from a breaker is detected, the information can be transmitted to the seismic relay and displayed on the display unit on the seismic relay.

1 Seismic relay system 2 Opening / closing unit 3 Seismic relay 23 Electric circuit opening / closing mechanism 28 Primary side terminal unit 29 Secondary side terminal unit 31 Detection unit 32 Judgment unit 33 Storage unit 34 Display unit 38 Power supply unit

Claims (4)

An opening / closing part equipped with an electric circuit opening / closing mechanism,
A detector that detects the acceleration or intensity of an earthquake,
A determination unit that outputs a cutoff signal to the opening / closing unit when the detection unit detects an acceleration equal to or higher than a predetermined value or a seismic intensity.
A storage unit that stores cutoff signal output information to the opening / closing unit,
After the opening / closing unit is shut off, a display unit that displays the presence / absence of the blocking signal output information in the storage unit when the opening / closing unit is restored.
With
The detection unit, the determination unit, the storage unit, and the display unit are formed in the seismic relay.
The opening / closing portion is formed in an earth leakage breaker having an earth leakage display button.
A seismic relay system in which the seismic relay is locked and integrated with the earth leakage breaker. The opening / closing portion includes a primary side terminal portion to which a system power supply is connected and a secondary side terminal portion to which a load is connected.
The seismic relay system according to claim 1, wherein the power supply unit connected to the secondary terminal portion of the opening / closing unit supplies power to the determination unit. The seismic relay system according to claim 1 or 2, wherein the display unit can display an operation signal of the opening / closing unit. Any of claims 1 to 3 in which one display unit displays a power supply display indicating the power supply state of the seismic relay and an operation display indicating the presence / absence of the cutoff signal output information of the storage unit at the time of a reverse return operation. Seismic relay system described in Crab.

Images