KR20160116580A - A switch gear with automatic recovery control function for start condition - Google Patents

Abstract

The present invention relates to an electric power distribution board having an automatic restoration function of a starting condition, and more particularly, to an electric power switch comprising: a starter switch for turning on / off a main contact between a main power source and a starting load; At least one preparatory switch for turning on / off the main contact between the main power supply and the preparatory load; A sensor unit for sensing the starting load and the state of the ready load; And a controller configured to receive a sensing value sensed by the sensor unit to determine whether the starting condition is satisfied at a constant sensing value and to turn on the main contactor of the starting switch if the starting condition is satisfied, Wherein the start condition is classified into a recoverable condition that can satisfy the condition of the ready load and a non-recoverable condition that is a condition other than the recoverable condition, and the controller satisfies the restoration condition, If not satisfied, a configuration is provided in which the main contact of the preparation switch is turned on to operate the preparation load.
Even if the restoration enabling condition is not satisfied, the provisional load is automatically operated to satisfy the condition, thereby automatically restoring the starting load even if the starting state of the starting load is less, thereby more stable and safe operation of the starting load can do.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an automatic switch control system,

The present invention relates to a control system for automatically starting or shutting down a load system using a circuit breaker or switch provided on an electric distribution board (water base, motor control panel, high-pressure panel, low-pressure panel, The present invention relates to an electrical switchboard having a function of automatically restoring an operating condition.

The present invention also relates to an electric power distribution board having an automatic restoration function of a start condition, which is configured to be in an operation mode by a manual continuous start operation or a cyclic operation and to select and start the corresponding operation mode.

In addition, the present invention divides start conditions into a non-recoverable condition and a recoverable condition, satisfies the non-recoverable condition, but if the recoverable condition is not satisfied, activates the ready load to satisfy the corresponding recoverable condition, The present invention relates to an electrical switchboard having an automatic restoration function of a start condition.

The present invention also provides a method for determining whether a breaker or an open / close device is of an always-excitation type or an instantaneous-excitation type, and determining whether the breaker or the switch is erroneous or not, And to provide an electric distribution board having the above-mentioned structure.

(Hereinafter collectively referred to as "switchboard") is a device that supplies power to various loads in a stable manner. Inside is a transformer for instruments, a voltage / current meter, a load Various kinds of breakers or switches for interrupting power supply are constituted by a simple structure of inputting and stopping. At present, one or more ready outputs (ON-OFF) and a common control method for the instantaneous and instantaneous excitation of the switches are required.

As an example, a pump is installed in a rainwater pumping station water supply and sewage pumping station. At this time, power is supplied from a commercial power supply, and a pump motor is driven in a low pressure chamber. That is, power for operating the pump or power for driving the motor is supplied from the commercial power source. Power control panels such as switchboards are installed to supply and control appropriate commercial power.

The above-mentioned switchboard is provided with a main breaker which cuts off the supply of commercial power to the transformer. That is, the transformer is connected to the rear end of the main breaker. Also, a meter transformer necessary for measuring the voltage and current of the input or output terminal of the transformer, and a meter and a sensor for detecting an overload, a short circuit, and a miswiring are provided. In addition, various types of switches such as a breaker, a switch, and the like for interrupting the electric power required for driving the electric motor are provided (hereinafter, the breaker, the switch, and the switches are collectively referred to as the switch). And a control unit (or control device) for controlling the switch and the breaker.

The control unit receives signals sensed from various sensors according to a user's operation command, calculates input signals, and turns on and off an interrupter for supplying electric power to the electric motor as well as the main breaker. Further, in order to operate the switch, an excitation coil for activating the connection of the switch is provided. In general, a separate electric power (operation power source) for driving the excitation coil is supplied to control ON / OFF of the switch. The control unit applies current to the exciting coil to turn the switch on and off.

Depending on the type of switch, it can be divided into an always-exciting switch and an instant-exciting switch. When the exciting current is applied to one exciting coil, the normally exciting type switch keeps the input state (on state) by the electromagnetic force, and is switched to the off state when the exciting current is interrupted. The instantaneous excitation type switch includes two excitation coils for each function such as an excitation excitation coil and a blocking excitation coil for releasing the mechanical lock. At the time of charging, current is supplied to the excitation coil to turn on the switch. After being turned on, the ON state is maintained by the mechanical structure (latch type). According to an instruction from the control unit, when the switch is turned off, exciting current is supplied to the blocking excitation coil to release the part mechanically locked at the time of On, thereby shutting off the switch. Since the latch type, which is a mechanical structure that maintains the on-state after being turned on, is a structure commercialized in this field, a detailed description thereof will be omitted. The normally open type switch and the instantaneous open type switch are selectively used as needed [Patent Document 1].

The supply of electric power to the load such as the electric motor can be controlled through the control of the breaker or the switch. That is, through the control of the breaker or the switch, it is possible to automatically control the pump installed in the rainwater pump station water supply and sewage pumping station depending on the situation. Techniques for automatic control as described above have been proposed [Patent Documents 2, 3, 4].

However, the pump installed in the rainwater pumping station and the water supply and drainage pumping station should be operated in emergency such as flood season and should be operated according to the condition desired by the user, such as inspection operation is required so that the emergency operation can be performed normally. Although the present invention has been described by way of example with reference to the use of an electric load such as a rainwater pumping station for the convenience of description of the present invention, the present invention is not limited thereto and can be applied to all facilities using electric loads. Hereinafter, a rainwater pump station will be described as an example for convenience of explanation.

The main pump of the water intake pump and the rainwater pump station can be operated only when a certain amount of water (for example, priming water) is supplied, and a pump (referred to as a preparation pump) for supplying priming water to the main pump (hereinafter referred to as the starting pump) is provided separately. Thus, there is a need for a technique that automatically supplies power to the load when necessary, and is automatically controlled according to various environmental conditions to provide more stable and safe control.

Korean Registered Patent No. 10-1242981 (Announcement of Mar. 13, 2013) Korean Registered Patent No. 10-1306018 (Announcement of Dec. 12, 2013) Korean Registered Patent No. 10-1231813 (published on Mar. 02, 2013) Korean Registered Patent No. 10-1050374 (issued on July 19, 2011)

SUMMARY OF THE INVENTION The object of the present invention is to solve the above problems, and it is an object of the present invention to divide startup conditions into " non-recoverable condition "and" recoverable condition " And an automatic restoration function of the start condition, in which the start load is operated after satisfying the restorable condition.

It is also an object of the present invention to provide a step-down resistor in parallel with a signal contact (command signal contact) connected in series to an excitation coil of an actuator, to supply a small current to the excitation coil through a step- (Hereinafter referred to as " opening / closing device ") of the switch device, whether the type of the switch device is the normally exciting type or the instantaneous energizing mode, .

In order to accomplish the above object, the present invention provides an electrical switchboard having an automatic restoration function for starting conditions, comprising: a starter switch for turning on / off a main contact between a main power source and a starting load; At least one preparatory switch for turning on / off the main contact between the main power supply and the preparatory load; A sensor unit for sensing the starting load and the state of the ready load; And a controller configured to receive a sensing value sensed by the sensor unit to determine whether the starting condition is satisfied at a constant sensing value and to turn on the main contactor of the starting switch if the starting condition is satisfied, Wherein the start condition is classified into a recoverable condition that can satisfy the condition of the ready load and a non-recoverable condition that is a condition other than the recoverable condition, and the controller satisfies the restoration condition, If not satisfied, the main contact of the preparation switch is turned on to start the preparation load.

Further, in the present invention, in the switchboard having the automatic restoration function of the starting condition, the control unit stores in advance a table for the preparation load corresponding to the restorable condition, And a main contact of the preparation load of the preparation load is turned on.

Further, in the present invention, in the switchboard having the automatic restoration function of the starting condition, the starting switch or the preparatory switch comprises an exciting coil to operate the main contact when the exciting coil is excited, And the signal contact is connected in parallel with the step-down resistor, and an operation current is supplied to the excitation coil under the control of the control unit, and the control unit controls the step- And an operation current is supplied to the excitation coil through the excitation coil to sense the starting switch or the preparation switch, or to determine the type of the switch.

Further, in the switchboard having the automatic restoration function of the starting condition, the step-down resistor reduces the operating current so that even if the operating current (monitoring current) that is reduced to the exciting coil is supplied, the switching contact can not be operated And has a high resistance. At this time, the residual current value is only a few mA.

Further, in the present invention, in the switchboard having the automatic restoration function of the starting condition, the control unit discriminates the instantaneous excitation type when both the exciting coil and the blocking excitation coil are detected in the starting switch or the ready switch, And when it is detected that only the coil is detected, it is determined that it is the normally exciting type.

Further, in the present invention, in the switchboard having the automatic restoration function of the starting condition, the starting switch or the preparation switch may include a line for supplying an operating current of the exciting coil for operating the main contact, And the line for discrimination is one common line.

According to another aspect of the present invention, there is provided an electrical switchboard having an automatic restoration function of a starting condition, the control unit comprising: (a) operating in accordance with the operation mode in response to the operation mode; (b) receiving a sensing value from the sensor unit and determining whether the restoration impossibility condition is satisfied; (c) if all of the restoration-impossible conditions are satisfied, determining whether all of the restorable conditions are satisfied; (d) if there is an unsatisfactory restorable condition, turning on the main contactor of the ready switch corresponding to the restorable condition; And (e) turning on the main contactor of the start switch when the restorable condition is satisfied.

(G1) a step of checking whether the ready-made switch is an instantaneous excitation type or a normally-excited type immediately after the step (a); and step; And (g2) immediately before the step (e), checking whether the starting switch is the instantaneous excitation type or the always excitation type.

As described above, according to the switchboard having the function of automatically restoring the start condition according to the present invention, even if the restorable condition is not satisfied, the ready load is operated to automatically satisfy the condition, The operation of the starting load can be controlled more stably and safely.

Further, according to the switchboard having the automatic restoration function of the start condition according to the present invention, the switch of the start load or the preparation load is checked in advance and the type of the instantaneous excitation type or the normally energized type is automatically confirmed, It is possible to obtain an effect of making compatibility with the normally-open excitation switch.

1 is a block diagram of a configuration of an electric distribution board having an automatic restoration function of a start condition according to an embodiment of the present invention;
2 is a circuit configuration diagram of an electric distribution board having an automatic restoration function of the start condition of the present invention.
3 is a block diagram of a configuration of a control unit of an ASSEMBLY according to an embodiment of the present invention;
4 is a flowchart for explaining a method of driving an ASSY provided with an automatic restoration function of a start condition according to an embodiment of the present invention;
5 is a flowchart for explaining an example method of applying a driving method of an electric distribution panel having an automatic restoration function of a starting condition according to the present invention to a main pump.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

In the description of the present invention, the same parts are denoted by the same reference numerals, and repetitive description thereof will be omitted.

First, a configuration of an electric distribution board having an automatic restoration function of a starting condition according to an embodiment of the present invention will be described with reference to Fig.

As shown in FIG. 1, the switchboard 100 having the function of automatically restoring the starting condition according to the embodiment of the present invention includes an actuation switch 20a for opening and closing the main power supplied to the starting load 11, A sensor unit 40 for measuring and sensing various states of the load and outputting a sensing value, and a sensing unit 40 for receiving a sensing value output from the sensor unit 40 And a control unit 30 for controlling the opening and closing of the starting switch 20a and the preparation switch 20b in accordance with the calculation result.

Hereinafter, a rainwater pumping station will be exemplarily described for convenience of explanation of the present invention. However, the control structure and method of the switchboard 100 according to the present invention are not limited to the water turbine, motor control panel, high- It can be applied to all of the power control panels.

The switchboard 100 receives the extraordinary pressure and transforms it to a high pressure to supply power to the starting load 11 or the ready load 12 or the like. For example, in a rainwater pumping station, an extra high voltage of 22.9 KV is received and transformed to a high voltage of about 3300 V to supply power.

The starting load 11 refers to a load for performing a main operation and the preparation load 12 refers to a load for performing a necessary operation in advance in order to operate the starting load 11 such as a main pump or the like. For example, the load for supplying water from the pump station, such as the main pump of the pump station (or the drive motor of the main pump), is the starting load 11. Further, an auxiliary pump (or a driving motor of an auxiliary pump) for supplying priming to the main pump or an outlet valve (or a driving motor of the outlet valve) of the main pump is the preparation load 12. That is, the preparatory load 12 can be said to be all the persons who perform work to be prepared in advance in order to operate the main pump.

In the present invention, for convenience of explanation, the ready load is indicated by only one electric motor that drives the pump that supplies the priming pump to the main pump, but this is for the sake of convenience in explanation, and a plurality of ready loads of the same structure may be connected in parallel.

Hereinafter, the same reference numerals as those of the starting load 11 or the standby load 12 are used for the main pump (or the driving motor of the main pump) or the auxiliary pump or the outlet valve (or the driving motor thereof) Used in combination with ready load.

An example of a rainwater pump station will be described. And supplies high-voltage electric power to the high-voltage electric motor which drives the main pump (starting load, 11) of the pump station. Further, a starter switch 20a for supplying or cutting off power to the high-voltage electric motor is provided. On the other hand, a low-voltage DC or AC power source of about 100 to 380 V is required for operating the switch. These low-voltage power sources are referred to as operation power sources. The high voltage power supplied to the starting load 11 or the standby load 12 will be referred to as a main power source.

Generally, due to the characteristics of the pump, water (for example, primed water) having a certain pressure or higher in the interior of the pump can be pumped. In such a pump structure, an auxiliary pump 12 is required to supply the main pump 11 with priming. That is, when the hydraulic pressure inside the main pump is sensed and the hydraulic pressure inside the main pump is less than a predetermined value, the auxiliary pump 12 supplies water so that the hydraulic pressure inside the main pump 11 becomes equal to or more than a predetermined value, So that the water in the main pump is filled to a predetermined pressure or higher.

Therefore, a valve driving motor for opening and closing the valve at the outlet until the hydraulic pressure inside the main pump becomes a certain level or more, and an auxiliary pump driving motor (electric motor) for supplying water to the inside of the main pump so as to maintain a predetermined pressure of water pressure in the main pump Respectively. The driving motor of the valve driving motor or the auxiliary pump as described above is the standby load 12. That is, the preparatory load 12 refers to a load that must be driven in order to satisfy the starting condition for starting the starting load 11 such as the main pump (or the driving motor of the main pump).

Next, the start switch 20a or the preparatory switch 20b is a switch that opens and closes the main power supplied to the start load 11 or the ready load 12. Hereinafter, the switch will be referred to as the start switch 20a or the preparation switch 20b, and the reference will be made to 20.

In the present invention, the switches 20a and 20b are referred to as openers and closers, but these are for convenience of description and can be replaced by circuit-breakers having a so-called capability.

The switch 20 connects or disconnects the supplied power by opening and closing the main contact between the main power source and the starting load 11 or the ready load 12. In order to operate the switch 20, there is provided an excitation coil for activating the connection of the switch. Generally, on / off of the switch is controlled by supplying a separate electric power (for example, operating power) for driving the exciting coil. The control unit 40 applies current to the exciting coil to turn the switch 20 on and off. That is, current is applied to the excitation coil of the switch 20 by the control unit 40, and the switch 20 is operated depending on whether or not the excitation coil is applied.

Depending on the type of the switch 20, it is divided into an always-excitation type switch and an instantaneous excitation type switch. The normally open excitation switch maintains the ON state when an excitation current is applied to one excitation coil, and is switched to the OFF state when excitation current is interrupted. The instantaneous excitation type switch includes two excitation coils for each function such as an excitation excitation coil and a blocking excitation coil for releasing the mechanical lock. At the time of charging, current is supplied to the excitation coil to turn on the switch. After being turned on, the on-state is maintained by the mechanical structure (ratcheting type). According to a command from the control unit, when the switch is turned off, excitation current is supplied to the excitation coil to release the part mechanically locked at the time of turning on, thereby shutting off the switch. The normally excited switch and the instantaneous excited switch may be selectively used as needed.

The control unit 30 calculates the input value (sensing value) input from various sensors of the sensor unit 40 by using a microprocessor or the like installed in the switchboard 100 and controls the start switch 20a or the preparatory switch 20b. Thereby, the control unit 30 supplies or cuts off the main power to the start load 11 or the ready load 12, thereby activating the start load or the ready load.

The control unit 30 receives an input value (sensing value) sensed from the sensor unit 40 according to a user's operation command, and calculates the sensing values to determine whether the starting condition is appropriate. If it is determined that the starting condition is appropriate, the control unit 30 activates the main pump 11 by operating the starter switch 20a that actuates the starter load 11 such as the main pump. Particularly, the control unit 30 causes the starting load 11 such as the main pump to operate until the pump manager reaches a desired condition (hereinafter referred to as an operation achieving condition), and when the operating condition is satisfied, And stops the operation of the main pump.

The sensor unit 40 includes a current sensor for measuring the current of the operating power source, a valve opening / closing sensor for detecting the opening / closing of the outlet valve of the main pump, a sensor for measuring the water pressure or the water level in the main pump, Or the various sensors that measure the state of the ready load 12. The measured data or sensed value in the sensor unit 40 is transmitted to the control unit 30 and is used for determining whether the operation condition (non-recoverable condition or recoverable condition) is satisfied or not based on the sensed value.

Next, the configuration of the control circuit of the switchboard having the automatic restoration function of the start condition according to the embodiment of the present invention will be described more specifically with reference to Figs. 2A and 2B.

FIG. 2A is a control circuit diagram in which the start switch 20a and the ready switch 20b are configured as an instantaneous exciter type switch, and FIG. 2B is a control circuit of a normally-excited switch. Hereinafter, the switch of the normally excited type of FIG. 2B will be described with reference to FIG. 2A only, and only the difference from the configuration of the instantaneous excitation type switch will be described.

As shown in FIG. 2A, the control circuit of the switchboard 100 is composed of a control unit 30, a start switch 20a and a preparation switch 20b.

The control unit 30 includes a control module 310 including a microprocessor and a signal output unit 320 for outputting a control signal from the control module 310.

The signal output unit 320 includes a signal output circuit for outputting an output control signal and a stop control signal to the start switch 20a and the ready switch 20b, respectively. The signal output unit 320 is configured to supply or cut operation power to the exciting coils L11, L12, L21 and L22 of the switches 20a and 20b. The signal output unit 320 supplies operating power that has been reduced to the excitation coils L11, L12, L21 and L22 of the switches 20a and 20b to determine the type of the switches 20a and 20b, .

The signal output circuits connected to the excitation coils L11, L12, L21 and L22 in the signal output unit 320 are connected to photocouplers P11, P12, P21 and P22, Resistors R31, R32, R41 and R42, the light receiving unit and the voltage-falling resistor, and the signal contacts S11, S12, S21 and S22 connected in parallel. Therefore, when the signal contacts S11, S12, S21 and S22 are turned on, the operating power is supplied to each of the exciting coils L11, L12, L21 and L22.

When the signal contacts S11, S12, S21 and S22 are turned off, the operating power source is connected to each of the exciting coils L11, L12, L21 and L22 through the resistors R31, R32, R41 and R42, . The step-down resistors R31, R32, R41 and R42 step down the operating power supply and provide a high resistance so as not to operate the switches 20a and 20b even when current flows through the exciting coils L11, L12, L21 and L22. . That is, the step-down resistors R31, R32, R41, and R42 step down the voltage of the operation power source and cause the step-down operation power source The force to be energized becomes small so that the main contacts J1 and J2 of the switches 20a and 20b can not be moved. The depressed operation power source is a power source supplied to check the switches 20a and 20b or to determine the type thereof.

The ON / OFF of the signal contacts S11, S12, S21 and S22 is controlled by the control module 310. [

The photocouplers P11, P12, P21, and P22 sense a current flowing through the line so that power noise is not supplied, and convert the detected voltage into an optical signal.

The starting switch 20a is constituted by a first switching excitation coil L11 and a first switching excitation coil L12 and a second switching excitation coil L21 and a second switching excitation coil L22 are also connected to the ready switch 20b. .

And is connected to each signal output circuit of the signal output unit 320 in series with the first and second excitation excitation coils L11 and L21 and the first and second cutoff excitation coils L12 and L22. That is, each signal output circuit of the signal output section 320 is a circuit for supplying or cutting off the operating power to the exciting coils L11, L12, L21, and L22. When a control signal is outputted from each signal output circuit, operating power is finally supplied to the exciting coil to excite the exciting coil. L12, L21 and L22 are supplied with a normal operation power (full operation power supply) or a stepped down operation of the exciting coils L11, L12, L21 and L22 in accordance with ON / OFF of the signal contacts S11, S12, S21 and S22 of the signal output unit 320 Operation power is supplied.

When the operating power is applied to each of the exciting coils L11, L12, L21 and L22, the exciting coils L11, L12, L21 and L22 are excited to connect or disconnect the main contacts J1 and J2. The main contacts J1 and J2 are contacts for connecting the main power source to the starting load 11 or the standby load 12. [ That is, when the main contacts J1 and J2 are connected, when the main power is supplied to the starting load 11 or the standby load 12 and the main contacts J1 and J2 are shut off, The load 12 is cut off.

Preferably, when the first or second excitation coil L11 or L21 is energized, the starting load 11 or the main contacts J1 and J2 of the preparatory load 12 are connected. At this time, the main contacts J1 and J2 are mechanically connected by a mechanical locking device (not shown). The connection of the starting load 11 or the main contacts J1 and J2 of the preparatory load 12 is maintained even if the first or second excitation coil L11 or L21 is not supplied with the operating power.

When the first or second blocking excitation coil L12 or L22 is excited, the connecting state of the main contacts J1 and J2 of the starting load 11 or the preparatory load 12 is released. That is, the main contacts J1 and J2 are locked by the mechanical lock device, but the connection state is released by the first or second blocking excitation coils L12 and L22 so that the starting load 11 or the preparation load The main contacts J1 and J2 of the main contact 12 are cut off.

Each of the exciting coils L11, L12, L21 and L22 is connected in series to the breaker or switch contactor contacts Y11, Y12, Y21 and Y22 mechanically interlocked with contacts of the switchgear, , Y21, and Y22 are connected in parallel with the check resistors R11, R12, R21, and R22, respectively. Therefore, when the switch auxiliary contacts Y11, Y12, Y21, and Y22 are turned off, the operation power source or operation current flows through the check resistors R11, R12, R21, and R22.

The checking resistors R11, R12, R21 and R22 step down the operating power source and provide a high resistance so as not to operate the main contacts J1 and J2 even when a current flows through the exciting coils L11, L12, L21 and L22 Respectively. That is, the checking resistors R11, R12, R21 and R22 lower the voltage of the operating power supply, and even if a current is supplied to the exciting coils L11, L12, L21 and L22, And the main contact (J1, J2) can not move. Therefore, the exciting coils L11, L12, L21 and L22 can operate the main contacts J1 and J2 only when the operating power is supplied through the switching auxiliary contacts Y11, Y12, Y21 and Y22. The operation power supply at this time is referred to as a normal operation power supply.

Each of the switch auxiliary contacts Y11, Y12, Y21, and Y22 is a contact which is mechanically interlocked with the main contacts J1 and J2 and is turned off, and is generally called an A contact or a B contact of a breaker or switch , And is turned on / off according to on / off of the main contacts J1 and J2. That is, when the main contacts J1 and J2 are turned off (connected), the switch auxiliary contacts Y11 and Y21 (hereinafter referred to as the input auxiliary contacts) connected to the input excitation coils L11 and L21 are turned on, And is turned off when the main contacts J1 and J2 are turned on (connected). Conversely, when the main contacts J1 and J2 are turned off (connected), the switching auxiliary contacts Y12 and Y22 (hereinafter, blocking auxiliary contacts) connected to the blocking excitation coils L12 and L22 are turned off as they are, When the main contacts J1 and J2 are turned on (connected), they are turned on.

Therefore, when the main contacts J1 and J2 are off, the input auxiliary contacts Y11 and Y21 are turned on. At this time, when the operating power is supplied to the input auxiliary contacts Y11 and Y21, the exciting excitation coils L11 and L21 are excited and the main contacts J1 and J2 are turned on. When the main contacts J1 and J2 are turned on, the input auxiliary contacts Y11 and Y21 are immediately turned off and the supply of the operating power to the excitation excitation coils L11 and L21 is normally interrupted. That is, only when the main contacts J1 and J2 are operated, the normal operating power is supplied to the exciting excitation coils L11 and L21.

Conversely, in a state in which the main contacts J1 and J2 are turned on, the blocking auxiliary contacts Y12 and Y22 are turned on. At this time, when the operating power is supplied to the blocking auxiliary contacts Y12 and Y22, the blocking excitation coils L12 and L22 are excited and the main contacts J1 and J2 are turned off. When the main contacts J1 and J2 are turned off, the blocking auxiliary contacts Y12 and Y22 are immediately turned off and the supply of normal operating power to the blocking excitation coils L12 and L22 is interrupted. That is, only when the main contacts J1 and J2 are operated, normal operation power is supplied to the cut-off exciting coils L12 and L22.

Namely, only when the main contacts J1 and J2 are operated, normal operation power is supplied to the exciting coils L11, L12, L21 and L22, respectively.

On the other hand, a current sensor (not shown) is provided on the line of the operation power source, and the current flowing through the control circuit of the switches 20a and 20b is measured. The current value is measured by the sensor unit 40 and transmitted to the control unit 30.

When the operating power is supplied to the exciting coils L11, L12, L21 and L22 of the switches 20a and 20b with the signal contacts S11, S12, S21 and S22 being off, , R32, R41, and R42. At this time, it can be confirmed that the current is measured in the current sensor (not shown), and the minute current (or the monitoring current, the residual current, for example, 1 to 3 mA, that is, the residual current value is only a few mA). In the case of the small current as described above, it can be confirmed that the exciting coil is connected. At this time, if the operating power is supplied to the exciting coils (L11, L12, L21, L22) but no microcurrent is detected, it can be confirmed that the exciting coil of the switching device is absent or has failed.

When the operating power is supplied to the exciting coils L11, L12, L21 and L22 of the switches 20a and 20b while the signal contacts S11, S12, S21 and S22 are turned on, (That is, the operating power source which is not forced down) is supplied. Therefore, in this case, the exciting coils L11, L12, L21 and L22 are normally excited to operate the main contact.

When the operating power is supplied to the exciting coils L11, L12, L21 and L22 in the state that the signal contacts S11, S12, S21 and S22 are off, if the small current is not detected, It can be judged that it is broken or not. Accordingly, the presence or absence of the first or second excitation coil L11 or L21 or the first or second blocking excitation coil L12 or L22 can be confirmed. If all of the first or second excitation excitation coils L11 and L21 and the first or second blocking excitation coils L12 and L22 are confirmed, it can be determined as an instantaneous excitation type switch, If only the exciting coils (L11, L21) are confirmed, it can be judged as a normally-open exciter.

That is, the operating power is supplied while the signal contacts S11, S12, S21, and S22 are off, the current is measured by a current transformer (not shown), and based on the measured sensing value, The type of the switch, and the like. This makes it possible to modify the settings as an error alarm when mis-setting.

Therefore, the same line is used as the operating line for operating the main contacts J1 and J2 and the discriminating line for discriminating the failure, type, and the like of the switches 20a and 20b. In other words, this means that the faulty check circuit of the instantaneous or instantaneous excitation type switch and the normally or instantaneous excitation type switch are one circuit.

In the case of the instantaneous excitation type switch, the signal contacts S11 and S21 are turned on to supply a normal operation power source to the first or second excitation electrifying coils L11 and L21. An amount of current enough to operate the main contacts J1 and J2 flows through the first or second excitation coil L11 or L21 so that the excitation switch is always turned on. At this time, the main contacts J1 and J2 are mechanically locked. When the main contacts J1 and J2 are mechanically locked, the switch auxiliary contacts Y11 and Y21 are turned off to cut off the operating power to the first or second closing excitation coils L11 and L21. However, the main contacts J1 and J2 are mechanically locked so that the main contacts J1 and J2 are not turned off even if no current flows through the excitation coils L11 and L21.

Then, the signal contacts S11 and S21 are turned on, and the normal operation power is supplied to the first or second blocking excitation coils L12 and L22. An amount of current enough to release the mechanical locks of the main contacts J1 and J2 flows to the first or second blocking excitation coils L12 and L22 so that the normally excitation switch is turned off.

Next, with reference to Fig. 2B, a description will be given of the difference between the normally excitation type switch and the instantaneous excitation type switch.

The circuit diagram of FIG. 2B shows a normally-excited type switch, compared with the instantaneous excitation type circuit diagram of FIG. 2A, in that the normally-excited type switch disconnects the configuration of the cut- It is different. That is, in the circuit diagram of FIG. 2A, the same is applied except for the blocking excitation coil and its associated inspection resistor or switch auxiliary contact. Also, in the case of the normally-excited type switch, the check resistors R11 and R21 and the switch auxiliary contacts Y11 and Y21 are also excluded.

In the case of the normally-open type switch, the signal contacts S11 and S21 are turned on to supply the normal operating power to the first or second closing excitation coils L11 and L21. An amount of current enough to operate the main contacts J1 and J2 flows through the first or second excitation coil L11 or L21 so that the excitation switch is always turned on. At this time, in order for the switch to be turned on, the operation power must be continuously supplied. In addition, by cutting off the operation current when shutting down, the main contacts J1 and J2 are shut off.

Next, the configuration and operation of the control unit 30 according to an embodiment of the present invention will be described with reference to FIG.

3, the control unit 30 includes a mode selection unit 31 for receiving a selected operation mode and operating the corresponding operation mode, and a control unit 30 for receiving a sensed value (sensed value) from the sensor unit 40 A sensor input unit 32, a start condition determining unit 33 for determining a start condition that the start load 11 can be operated, and a start condition determining unit 33 for performing a preparatory operation for satisfying restorable conditions of the start condition if the start condition is not satisfied A preparatory operation driving section 34 for supplying main power to the preparatory load 12 and an open / close type checking section 35 for checking the open / close type by detecting the open / close type. In addition, it further comprises a storage unit 36 for storing data. The storage unit 36 stores necessary data such as a start condition, a recoverable condition, a recoverable condition, and a preparation condition of a recoverable condition.

First, the mode selection unit 31 receives the operation mode of the switchboard 100 and controls operation in the corresponding operation mode.

The operation mode for operating the switchboard 100 is divided into a plurality of modes, and the user can select a specific operation mode and be operated differently according to the operation mode. The operation mode includes a remote operation mode operated by a command input from a user via a communication network from a remote location, a normal operation mode operated by a user-specified condition or an operation start signal, and a user operation state check And a check operation mode. Further, it is possible to configure the operation mode by manual continuous start operation or cyclic operation, and to select and execute the corresponding operation mode.

For example, when a periodic operation command is received during a normal operation mode, the starting load 11 such as the main pump is operated according to a certain period.

When the mode selection unit 31 performs the operation mode in the manual continuous operation mode or the periodic periodic operation mode, the mode selection unit 31 may display the remaining time of the cycle in a display (not shown) or the like.

Next, the sensor input unit 32 inputs the state of the equipment such as the voltage, current, failure, water level, open / closed state, etc. input from the inside and the outside of the switchboard 100 as sensing value from the sensor unit 40 Receive.

Next, the startup condition determiner 33 checks the input sensed values and determines whether the user satisfies the pre-stored startup conditions. When the start condition is satisfied, the start condition determiner 33 outputs a start signal to start the start load 11 such as the main pump.

Specifically, the starting condition determining unit 33 supplies operating power to the starting switch 20a to energize the exciting coil of the starting switch 20a, and when the switch is connected by the excited coil, And is supplied to the load 11. The main pump 11 or the drive motor of the main pump receives the main power and the main pump 11 is activated.

However, if the sensed values of the sensor unit 40 do not satisfy the starting condition, the starting condition determining unit 33 does not operate the starting load 11 such as the main pump and indicates that the main pump 11 is in an error state. That is, if any signal from any sensor of the sensor unit 40 is not inputted, the pump is not operated. Further, the main pump 11 is not operated unless the corresponding error element is eliminated.

For example, if the valve is open at the outlet of the main pump, and thus a certain amount of water is not supplied to the interior of the main pump, even if the user wishes to operate the main pump, It does not work. That is, if the condition for the amount of water in the main pump is not solved, it is determined that the operation is impossible.

In particular, in the case of a rainwater pump station, the main pump 11 is a load that is mostly inactive for a longer period of time than the operation time and is operated only in an emergency such as a flood season. In this case, inspection operation is essential for smooth operation in an emergency. However, at the time of the inspection operation, after the user sets the desired start condition to the virtual state in a state in which the desired condition such as the water level in the main pump is not established, the maintenance operation is performed or the operation is performed after the operation condition is satisfied There is no other choice.

Preferably, the start-condition determining unit 33 determines whether the unsatisfactory conditions in the start-up condition are a recoverable condition or a recoverable condition. When a condition that can not be recovered is referred to as a condition that can not be recovered in order to satisfy a condition, the condition that can not be recovered is a condition that can be controlled so as to operate the preparation load (12) or the like and satisfy the condition.

If there is at least one non-recoverable condition among the unsatisfactory conditions, the startup condition determination unit 33 displays an error and does not operate the startup load 11. If there is no recoverable condition and there is a recoverable condition, the start condition determiner 33 supplies the main load to the ready load 12 so that the recoverable condition is satisfied, and controls the ready load 12 so that the condition is satisfied .

Specifically, the start-up condition determination unit 33 determines whether it is a non-recoverable condition or a recoverable condition that is preset by the user (or the administrator). The recoverable condition is a condition that can be started if it is controlled by satisfying the start condition that can be recovered after the operation for satisfying the start condition.

The start condition determining unit 33 determines the unrecoverable condition based on various sensor data received from the sensor unit 40 in advance. For example, a signal inputted from a stop button (or a sensing value or a sensing signal) set by the user so as not to be operated in any case, a signal inputted from the overvoltage sensor, a signal inputted from the leak detector, A signal, and a signal indicating that a repair is in progress and a repair is in progress. In this case, it is necessary to ensure that no power is applied to the starting load (such as a motor or a pump connected to the electric motor) in the switchboard 100. That is, the input is received from the sensors set in advance, which is a value set in advance by the user according to the presence or absence of each sensor value.

In addition, the startup condition determination unit 33 determines the recoverable conditions set in advance. The recoverable start conditions are tabulated in advance (by the user or manager) and stored in the storage unit 36 or the like. These recoverable start conditions are satisfied when the control unit 30 operates the device (or the preparation load) controlled by the output signal of the operation signal and outputs the operation signal. That is, the input sensor values corresponding to these start conditions. As an example thereof, the starting conditions are based on sensing values of a hydraulic pressure sensor in the main pump, a sensor indicating the opening and closing of the opening / closing valve at the outlet of the pump, and the like.

Next, the preparatory operation driving section 34 supplies main power to the preparatory load 12 and controls the preparatory load 12 in order to satisfy the recoverable conditions.

The recoverable start condition is a condition that can control the water level or the water pressure in the pump to be a startable condition by operating the auxiliary pump by the control signal of the preparation operation drive unit 34. [ In addition, the preparatory operation driving unit 34 drives the opening / closing valve, so that the data or sensing values coming from the sensors that detect the locked state or the open state can satisfy the starting condition.

On the other hand, in preparation for the recoverable condition, preparatory operations necessary for satisfying the corresponding start condition are tabulated and stored in the storage unit 36 in advance. That is, the input values of these sensors are stored in advance in the form of a table in which the user prepares the start condition setting preparation operation (or preparatory operation).

Next, the open / close type checking unit 35 checks the start switch 20a and the ready switch 20b to determine whether the switch is the type of the normally open type switch, the type of the instantaneous open type switch, do.

When the type of the switch used in the switchboard or the like is changed, a compatibility problem that a separate control unit must be created may occur. That is, the control unit can be configured to be capable of switching functions according to the type of the switch, without any separate control unit, whether the switch is of the normally open type or the instantaneous open type. That is, the opening / closing type checking unit 35 determines the type of the opening / closing unit.

If the load is intermittently operated only in an emergency, it is checked whether power is normally supplied to the exciting coils, and the type of the switching device is determined. To this end, the switchboard 100 of the present invention not only supplies a provisional current for inspection but also supplies the intermittent current and the switch current to the same power line.

The setting and checking of the actuator type applies to all actuators. In addition, the user can selectively perform the time point of setting and checking the type of the switch. That is, at the same time as the power-on or at any time before or after judging the starting condition. For convenience of explanation, the present invention is described as being performed after the start condition determination condition.

The setting of the switch type is already installed according to the condition of the load condition of the switchboard such as the switchboard. Preferably, when the control device of the present invention is installed in the control panel control, it is possible to select in advance what type of switch is the user. The opening / closing type checking unit 35 acquires the type of the opening / closing device by the user's selection in advance.

First, a case where the user recognizes the equipment status of the switchboard and selects the switch type as the normally-excited type will be described. The configuration of the switch control circuit at this time is the same as that of FIG.

The normal operation power is supplied to the excitation excitation coils L11 and L21 only when the excitation excitation coils L11 and L21 of the excitation exciters 20a and 20b are normally connected as shown in Fig. The state where the signal contacts S11 and S21 are normally turned on refers to a state in which the signal contacts S11 and S21 are turned on and the normal operation power source is an operation power source in which the current supplied to the exciting coils is not limited It says. As described above, when the signal contacts S11 and S21 are turned off, the operating power source is supplied to the step-down resistors R31 and R41 and is stepped down. At this time, the current of the operation power source which is in the down state is 1 to 3 mA. This can be varied depending on the size of the resistor.

At this time, a minute current is sensed by a light-emitting diode of a current transformer or an optical coupler coupled to a line of an operation power source (hereinafter referred to as a current sensor for sensing the current flowing through exciting coils) By the sensing, the opening / closing type checking unit 35 determines whether a minute current is supplied to the switch actuating coils L11 and L21. Further, when the opening / closing type inspecting section 35 detects a microcurrent by a current sensor (not shown), it is judged that the microcurrent is normally operated.

On the other hand, in the case of the normally-excited switch in FIG. 2B, there is no first or second blocking excitation coil L12 or L22. Therefore, even if a minute current is supplied to the first or second blocking excitation coil L12 or L22, no current is measured in the current transformer (not shown). Therefore, the opening / closing type checking unit 35 can determine the type of the normally-open type switch by the current sensing of the operating power line connected to the first or second blocking excitation coils L12 and L22. This is because the normally-excited type switch generates an electromagnetic force which is inputted and intercepted by one coil. Preferably, in this case, the opening / closing type checking portion 35 confirms that the selection of the opening / closing type is normally energized, and that it is normally selected.

Further, the open / close type checking unit 35 can determine whether or not the exciting coils L11, L12, L21, and L22 have failed due to micro-current measurement.

Next, a case where the user recognizes the equipment status of the switchboard and selects the switch type as the instantaneous excitation type will be described.

2A, normal operation power is supplied to the excitation excitation coils L11 and L21 only when the excitation excitation coils L11 and L21 of the instantaneous exciters 20a and 20b are normally connected. As described above, when the signal contacts S11 and S21 are turned off, the operating power source is supplied to the step-down resistors R31 and R41 and is stepped down. At this time, the current of the operation power source which is in the down state is 1 to 3 mA. This can be varied depending on the size of the resistor.

At this time, the current is detected by the current transformer coupled to the line of the operation power source. By sensing the detection signal, the open / close type checking unit 35 detects the current transformer sensor from the line of the operation power source connected to the excitation coils L11 and L21 And determines whether the switch excitation coils L11 and L21 operate normally.

2A, since the first or second blocking excitation coils L12 and L22 are present, if a minute current is supplied to the first or the second blocking excitation coil L12 or L22, (Not shown), the current is measured. Therefore, the opening / closing type checking unit 35 can determine the type of the instantaneous excitation type switch by the current sensing of the operating power line connected to the first or second blocking excitation coil L12 or L22. This is because the instantaneous excitation switch generates an electromagnetic force to be input and cut by two coils. Preferably, in this case, the opening / closing type checking unit 35 confirms that the selection of the opening / closing type is instantaneous excitation, and that the selection is normally performed. The instantaneous excitation switch is provided separately from the excitation excitation coil and the excitation excitation coil.

Further, the open / close type checking unit 35 can determine whether or not the exciting coils L11, L12, L21, and L22 have failed due to micro-current measurement.

Next, a method of driving the switchboard with the automatic restoration function of the starting condition according to the embodiment of the present invention will be described in detail with reference to FIG.

As shown in FIG. 4, the switchboard or its control unit 30 is configured to perform the steps of (a) selecting an operation mode (S10), (b) (S30); (d) if the unsatisfactory restoration enable condition is present, activating the corresponding preparation load (S50); and (e) if the restorable condition is satisfied, the startup load activating step (S70). Further, (f) further includes a step (S80) of displaying an error if there is an unsatisfactory restoration condition. (G1) confirming the ready switch type before starting the preparatory load (S40), (g2) confirming the type of the start switch before starting the start load (S60).

First, the control unit 30 starts a driving operation according to the operation mode when the operation mode such as remote operation, inspection operation, and normal operation is selected and input from the user (S10). The preceding operation modes include a remote operation mode, a normal operation mode, and a maintenance operation mode. In addition, a detailed command corresponding to each operation may be received, such as periodic operation during the normal operation mode.

The control unit 30 performs an operation of activating the starting load 12 in accordance with the inputted operation mode and the detailed operation command. That is, when the operation mode such as automatic operation, manual operation, and cyclic operation is selected, a driving operation (which can be previously programmed to be performed) to be performed corresponding to the operation mode is started.

Next, the control unit 30 performs steps (steps (b) to (f) and steps (g1) and (g2) for the start-up operation when the start load 11 must be started by the operation mode Etc.). For example, when the starting load 11 must be started until the specific condition is satisfied by the automatic operation mode, the starting load 11 is started and the steps for the starting operation are performed at this time. When the specific condition is satisfied, the starting of the starting load 11 is stopped, and it is confirmed whether the specific condition is satisfied again. If the specific condition is not satisfied over time, the starting operation of the starting load 11 is automatically started again . That is, when restarting the start-up operation, steps (steps (b) to (f) and (g1), (g2)

Next, the control unit 30 confirms whether the restoration impossible condition is satisfied (S20). At this time, the controller 30 receives the sensing values from various sensors of the sensor unit 40, calculates the sensing values, and determines whether or not the sensor is in a restoration impossible condition.

If any one of the unrecoverable conditions is not satisfied by the sensing values of the sensor unit 40, an error message, a warning sound, a character or the like may be displayed, and if necessary, an error message Or an alarm is transmitted (S80).

If all the restoration impossible conditions are satisfied, the control unit 30 determines whether all the restorable conditions are satisfied (S30). If all of the restorable conditions are satisfied, the starting load is activated (70). That is, the control unit 30 connects the starting switch 20a of the starting load 11 to supply the main power to the starting load 11. To this end, the control unit 30 supplies operating power to the closing excitation coil L11 of the starting switch 20a.

However, if there is an unsatisfactory recoverable condition, the control unit 30 activates the ready load 12 to satisfy the recoverable condition (S50). The control unit 30 stores the data of the preparation load 12 corresponding to the restorable condition in advance, that is, the data of the preparation load 12 to be activated, and then retrieves the stored table to satisfy the restorable condition The start operation of the preparation load 12 is confirmed. That is, the control unit 30 connects the preparatory switch 20b of the preparatory load 12 to supply the main power to the preparatory load 12. To this end, the control unit 30 supplies the operating power to the closing excitation coil L21 of the preparation switch 20b.

The control unit 30 also performs an operation of checking the type of the switch before starting the start load 11 or the ready load 12 (S40, S60). In the flowchart of Fig. 4, step S40 of confirming the type of preparation switch 20b is performed immediately before the step S50 of activating the preparation load. Also, a step S60 of confirming the type of the starting switch 20a is performed immediately before the step S70 of starting the starting load.

However, steps S40 and S60 for confirming or checking what type of switch is possible can be performed at any stage before starting the start load 11 or the ready load 12. That is, since the switch provided once is not replaced at any time, once the operation is started by the operation mode, both the start switch and the ready switch are checked at a time after the start of the operation mode operation, ), It may not be performed even if the starting operation is started again.

In other words, the setting of the type of the switch and the step of inserting the switch are applied to all the switches, and the execution time of this step can be selectively performed by the user. That is, at the same time as turning on the power or at any time before or after the start condition determination condition.

The above process will be described in detail as an example of a main pump. Fig. 5 is a detailed flow chart for the main pump.

A description will be given of a case where the sensor values inputted from the sensors defined in the restorable condition are not normal. For example, if the water level or the water pressure in the main pump is not equal to or more than a predetermined value, or if the valve of the pump discharge port is open, the restorable condition by the sensor is not satisfied.

At this time, the preparatory load 12 corresponding to the restorable condition is an auxiliary pump or an on-off valve, respectively. Therefore, the control unit 30 starts preparation work for supplying electric power to the auxiliary pump and the opening / closing valve. That is, the control unit 30 performs the type of the ready switch and the checking operation. Normally, the auxiliary pump and the on / off valve are driven in the check operation. That is, power is supplied to the excitation excitation coil of the switch that supplies electric power to the motor driving the auxiliary pump and the on-off valve. Therefore, the electric motors are driven to lock the opening / closing valve, and the auxiliary pump is operated to control the hydraulic pressure or the water level in the main pump to be constant.

Therefore, if the corresponding restorable condition is satisfied, all the conditions are satisfied in all the restorable condition satisfying step (S30). Then, the starting of the starting load 11 can be started.

Thus, the control unit 30 supplies excitation current to the excitation excitation coil of the main pump switch to control the main pump to operate. At this time, the process of opening the opening / closing valve is naturally performed by a control signal for opening the opening / closing valve for opening the pump outlet.

Further, although not shown or described in detail above, it is necessary for the power management such as the operation time in the selected operation mode, the operation remaining time at the set operation time, the operation setting time, the operation status display of the error display, the voltage current, There is provided a display unit for displaying data, and these functions are added to the present invention. Also, although the input / output devices for setting or changing the control conditions are also provided in the control unit, they are well known in the art and will not be described in detail.

 The control output of the control unit such as the existing power distribution board satisfies all the conditions that can not be restored. If any condition corresponding to the condition that can be restored is unsatisfactory, the movable load can not be operated. However, according to the switchboard 100 of the present invention, when the restoration-impossible condition is normal but the restorable condition is unsatisfactory, it is possible to perform the intermittent operation or to effectively perform the check operation .

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

11: Starting load 12: Preparation load
20a: Start switch 20b: Preparation switch
30: control unit 31: mode selection unit
32: sensor input unit 33:
34: preparation operation driving part 35: opening / closing type inspection part
36: storage unit 40: sensor unit
100: Switching board 310: Control module
320: Signal output section

Claims (9)

An activating switch for turning on / off the main contact between the main power source and the starting load;
At least one preparatory switch for turning on / off the main contact between the main power supply and the preparatory load;
A sensor unit for sensing the starting load and the state of the ready load; And
And a control unit for receiving a sensing value sensed by the sensor unit to determine whether the starting condition is satisfied at a constant sensing value and turning on the main contactor of the starting switch if the starting condition is satisfied,
Wherein the start condition is classified into a recoverable condition that can satisfy the condition of the ready load and a non-recoverable condition that is a condition other than the recoverable condition,
Wherein the control unit is operable to activate the standby load by turning on the main contactor of the standby switch if the restoration disable condition is satisfied but the restoration enable condition is not satisfied One switchboard.
The method according to claim 1,
The control unit previously stores a table of the preparation load corresponding to the restorable condition and then searches the table to find a preparation load corresponding to the unsatisfactory restorable condition, And an automatic restoration function of the start condition.
The method according to claim 1,
The starting switch or the preparation switch may include an exciting coil to operate the main contact when the exciting coil is excited,
Wherein the excitation coil is connected in series with a signal contact, the signal contact is connected in parallel with a step-down resistor, an operation current is supplied to the excitation coil under the control of the control part,
Wherein the controller is operable to supply an operating current to the exciting coil through the step-down resistor in a state where the signal contact is turned off to detect the start switch or the ready switch, or to determine the type of the switch. Switchboard with function.
The method of claim 3,
Wherein said step-down resistor has a high resistance so as not to operate said switch contact even when said operating current is supplied to said exciting coil by stepping down said operating current.
The method of claim 3,
Wherein the controller discriminates the instantaneous excitation type when the exciting excitation coil and the excitation excitation coil are both detected in the starting switch or the ready switch, Switchboard with automatic restoration function.
6. The method according to any one of claims 3 to 5,
Wherein the starting switch or the preparation switch comprises a line for supplying an operating current of the exciting coil to operate the main contact and a line for detecting the type of the switch or for determining the type of the switch is one common line. Switchboard with restoration function.
The apparatus of claim 1,
(a) receiving an operation mode and operating in accordance with the operation mode;
(b) receiving a sensing value from the sensor unit and determining whether the restoration impossibility condition is satisfied;
(c) if all of the restoration-impossible conditions are satisfied, determining whether all of the restorable conditions are satisfied;
(d) if there is an unsatisfactory restorable condition, turning on the main contactor of the ready switch corresponding to the restorable condition; And
(e) turning on the main contactor of the start-up switch if the restorable condition is satisfied. The switchboard of claim 1, further comprising:
8. The method of claim 7,
(g1) immediately after the step (a), checking whether the ready-made switch is an instantaneous excitation type or an always-excitation type; And
(g2) immediately before the step (e), checking whether the starting switch is an instantaneous excitation type or an always-exciting type.
9. The method according to any one of claims 1 to 8,
Wherein the switchboard is any one of a water front panel, an electric motor control panel, a high-pressure panel, a low-voltage panel, and a distribution panel.

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