JPH10322877A - Autokick breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically check the cause of disconnection in a breaker, to automatically restore a breaker when it is safe for continuous use, and to stop the return operation in the case of an abnormal load. SOLUTION: This autokick breaker has a sensor 2 which detects the contact condition of a breaker 1, a sensor 3 which detects the passage current of the breaker 1, and a controller 5 which sends a breaker return signal to a breaker driver 4 with the detection result by the sensors 2 and 3, and this performs the following control. When an overcurrent at or above a specified current value over a standardized value flows continuously for a specified time t or more to a breaker 1 (control A), this breaks the breakers 1 and successively performs the restoration of the breaker 1 until specified n times within the time T, but in the case that the breaker 1 breaks specified n times or over within the time T, this does not restore the breaker 1. This breaks the breaker 1 when an instantaneous current flows within the time t to the breaker 1 (control B), and successively this restores the breaker 1 a specified number of N times or over within the time T, but in case that the breaker 1 breaks over a specified number of N times within the time T, this does not restore the breaker 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention always monitors the state of a load by computer control when a breaker breaks due to induced lightning or instantaneous overcurrent when a lightning strike occurs, and determines that it is safe. The present invention relates to an automatic kick breaker that automatically starts up a breaker in such a case and stops the return operation of the breaker in an abnormal load.

[0002]

2. Description of the Related Art For example, when a breaker is cut off at a relay station of a broadcasting station or the like, if the cause is a temporary one caused by an induced lightning or the like, the circuit is automatically reset using a non-fuse breaker. This eliminates the need to go to the site and engage in restoration work each time, which is convenient.

However, when the breaker is interrupted by an abnormal load such as an overload or a short circuit, it is necessary to refrain from automatically returning the breaker and prepare for the investigation and repair of the cause of the abnormality.

[0004]

For this reason, it is necessary to automatically determine whether the breaker interruption is temporary due to induced lightning or an abnormal load such as overload or short circuit.

Further, if it is determined that the circuit is safe as a result of detecting the state of the load, if the breaker can be started automatically, the load can be protected and the wasteful work of going to the site to start the breaker can be achieved. Is unnecessary, and the cost can be greatly reduced.

The present invention has been made in view of such circumstances, and when a breaker shuts off, the cause of the breaker shutoff is automatically determined. It is an object of the present invention to provide an automatic kick breaker in which the return operation of the breaker is stopped in the case of a load.

[0007]

To achieve the above object, an automatic kick breaker according to the present invention comprises a sensor for detecting a contact state of a breaker, a sensor for detecting a current passing through the breaker, and A breaker driving device that returns, and a control device that sends a breaker return signal to the breaker driving device based on a detection result of each of the sensors. The control device: (Control A) a predetermined current that exceeds a standard value to the breaker When it is determined that an overcurrent that is equal to or more than the predetermined value has continuously flowed for a predetermined time or more, the breaker is shut off, and
Returning to the predetermined N times within the time period, but when the breaker cuts off the predetermined N times or more within the T time period, the breaker is not returned. (Control B) The breaker is momentarily stopped during the t time period. When it is determined that a proper current has flowed, the breaker is shut off, and then the breaker is returned the predetermined number of times N times or more within the T time, but the breaker is returned N times or more within the T time. When the circuit breaks more than a predetermined number of times, the breaker is prevented from returning.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a control circuit of the automatic kick breaker according to the present invention. FIG. 2 is an external view of a unit body incorporating a control circuit according to the present invention. FIG. 3 is a time chart of the automatic kick breaker of the present invention.

In FIG. 1 and FIG. 2, a sensor 2 for detecting a contact state of a breaker 1, a sensor 3 for detecting a passing current of the breaker 1, a breaker driving device 4 for returning the breaker 1, a respective sensor 2, A computer control device (hereinafter, referred to as a CPU) for sending a breaker return signal to the breaker driving device 4 based on the detection result by the CPU 3 performs control A and control B described later on the breaker 1 by the CPU 5.

The above configuration will be described in detail. As the breaker 1, a known non-fuse breaker is used, and a power supply line L is connected between input terminals N1 and L1 on the power supply side and output terminals N2 and L2 on the load side. Connected. Also,
The breaker 1 has a built-in sensor 2 for monitoring the contact state of the breaker 1, and the breaker 1 is cut off or connected to the CPU 5 by the sensor 2.

A magnetic sensor 3 for monitoring the current consumption flowing through the breaker 1 is connected to the middle of the power supply line L, and the monitoring result is input to the CPU 5.

A breaker driving device 4 is connected to the breaker 1. The breaker driving device 4 is connected to the CPU 5 via the driver 6, and when the driver 6 is driven by the breaker return signal from the CPU 5, the solenoid provided in the breaker driving device 4 operates the breaker 1 to start up. To be returned to.

The power unit 7 is connected to the power supply line L on the downstream side of the breaker 1 and supplies power to the CPU 5 and other devices of the control circuit, and is controlled by turning on a main switch 8 of the power unit 7. The circuit is started.

The power supplied from the power unit 7 is connected to a charging circuit 9 and to the battery 10 via the charging circuit 9. The battery 10 uses an overcharge protection type, is in a charged state during normal operation, and is always fully charged.
The normal operation of the present control circuit is ensured even in the shut-off state of.

The CPU 5 has a built-in backup power supply, and can monitor the power supply irrespective of the state of the power supply.

An operation monitor 11 connected to the CPU 5
Indicates an operation state of the CPU 5 by an LED. POW is displayed in green, AR1, AR2, and AR3.
Is displayed in red.

Of these, POW is a power supply monitor of the CPU 5 and is turned on when the power is on.

AR1 is breaker 1 cutoff content 1
(In the case of the control A described above), which is turned on when the breaker 1 is shut off due to a trouble on the load side. AR2 indicates breaker 1 cutoff content 2 (in the case of the above control B), and is turned on when the breaker 1 cuts off under external conditions such as induced lightning.

AR3 is a monitor for monitoring the reduced voltage of the battery 10, and the voltage of the battery 10 is, for example, 1
When the voltage becomes 0 V or less, it is turned on.

The counter SRT 12 is a reset switch dedicated to the counter, and is used in combination with the CPU reset 13. Normally counter RST12 to prevent malfunction
The counter is not cleared just by turning ON only. First, the CPU reset 13 is turned off, and it is confirmed that the counter display is "00".
When ST12 is turned off, the counter becomes 00.

The counter 14 is a device for displaying the number of times of control, and displays the number of times the breaker 1 has been started.

The breaker cover 15 shown in FIG. 2 is a cover of the breaker 1. When the breaker 1 is manually operated, the breaker cover 15 can be operated by removing two screws 16 of the cover.

The terminal plate 17 shown in FIG.
1, L1 or the output terminals N2, L2.

Next, the software specifications of the control circuit by the CPU 5 will be described.

In the initial setting, the state of the control port is automatically checked after the power is input, and the LED, counter, breaker 1 and driver 6 of the operation monitor 11 are reset after 3 seconds.

The reset function monitors the input of the main switch 8 and resets when there is an input.

The battery voltage monitoring is for monitoring the power supply voltage of the battery for the control circuit.
When the voltage falls below V, runaway of the CPU 5 is prevented.

In the present embodiment, the following operations are performed in the normal operation by monitoring the contact state of the breaker 1 and the amount of current flowing through the breaker 1.

When the control A determines that an overcurrent exceeding a specified value (for example, 160% of the specified current) exceeding the specified value has continuously flowed for a specified period of time (eg, 9 seconds), the circuit breaker 1 is activated. The breaker 1 is returned to the predetermined N times (for example, 3 times) within the T time (30 minutes), and the breaker 1 is turned off for the predetermined N times (3 times) or more within the T time (30 minutes). In this case, the breaker 1 is not returned.

In this case, as shown in the breaker control timing (3) in FIG. 3, when the energized state returns to the standard value within T time (30 minutes), the state is returned to the normal monitoring state.

Further, as shown in the breaker control timing (2) of FIG.
If the value exceeds (minutes), the internal count value in the CPU 5 is cleared and set to 0.

In the control B, t time (9 seconds) is applied to the breaker 1.
When it is determined that an instantaneous current has flowed, the breaker 1 is turned off, and then the breaker 1 is returned a predetermined number of times (for example, 10 times) N times or more within T time (30 minutes). Breaks more than N times or more times (10 times) within T time (30 minutes).
Not to return to

In this case, as shown in the breaker control timing (1) in FIG. 3, if the return is completed within 1 to 10 times within the T time (30 minutes), the reset is performed, and the operation is returned to the normal monitoring state. Repeat this.

As described above, the predetermined current value is set to 160% of the standard current, the t time is set to 9 seconds, the T time is set to 30 minutes, and N times is set to 10 times depending on the setting at the time of use. The present invention is not limited to this.

[0036]

As described above, in the automatic kick breaker according to the present invention, when the breaker is cut off, the passing current of the breaker is monitored by the sensor, and the passing current is equal to or more than a predetermined current value exceeding the standard value. By determining that the current has continued to flow for a predetermined time or more, the overcurrent is determined to be an abnormal current on the load side, and the breaker is returned to the predetermined N times within the T time. If the circuit breaker is interrupted a predetermined number of times N or more within the time, the breaker is controlled not to return.

When the breaker is cut off, when it is determined that an instantaneous current has flowed in the breaker for the time T, it is determined that the breaker has been cut off by induced lightning or the like, and the breaker is turned off within the time T. At least a predetermined number of returns are performed, but if the breaker shuts off more than a predetermined number of times N times or more within the T time, the breaker is not returned.

By such a breaker return control,
It is possible to automatically determine the cause of the breaker cutoff, automatically return to use in the case of safety, and continue use, and stop the return operation of the breaker in the case of an abnormal load.

Therefore, even if the breaker breaks at a relay station of a remote broadcasting station or the like, if the breaker is temporarily interrupted by lightning or the like, the breaker automatically returns safely,
The recovery work is unnecessary, and the user only has to go to the recovery work when the power supply is shut down due to an abnormal load, which is much more effective in reducing the labor than in the past.

[Brief description of the drawings]

FIG. 1 is a diagram showing a control circuit of an automatic kick breaker according to the present invention.

FIG. 2 is an external view of a unit main body incorporating a control circuit according to the present invention.

FIG. 3 is a time chart of the automatic kick breaker of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Breaker 2 ... Sensor which monitors the contact state of a breaker 3 ... Sensor which monitors the energization state of a breaker 4 ... Breaker drive device 5 ... CPU (computer control device) 6 ... Driver 7 ... Power unit 8 ... Main switch 9 ... Charging circuit DESCRIPTION OF SYMBOLS 10 ... Battery 11 ... Operation monitor 12 ... Counter reset 13 ... CPU reset 14 ... Counter 15 ... Breaker cover 16 ... Screw 17 ... Terminal board

Claims (1)

[Claims] A sensor for detecting a contact state of the breaker; a sensor for detecting a current passing through the breaker;
A breaker driving device for returning the breaker, and a control device for sending a breaker return signal to the breaker driving device based on a detection result of each of the sensors. (Control A) A standard value is set for the breaker. When it is determined that an overcurrent exceeding a predetermined current value exceeding the predetermined time has flowed for a predetermined time t or more, the breaker is cut off, and
Returning to the predetermined N times within the time period, but when the breaker cuts off the predetermined N times or more within the T time period, the breaker is not returned. (Control B) The breaker is momentarily stopped during the t time period. When it is determined that a proper current has flowed, the breaker is shut off, and then the breaker is returned the predetermined number of times N times or more within the T time, but the breaker is returned N times or more within the T time. An automatic kick breaker, wherein the breaker does not return if the circuit breaks more than a predetermined number of times.