KR20110129751A - Selective setting and saving apparatus of protection for electronic motor protection relay - Google Patents

Abstract

PURPOSE: An apparatus for selectively setting and displaying a relay element for an electronic motor protecting relay is provided to optimize and selectively set activation for each relay element according to the user environment of an electronic protecting motor. CONSTITUTION: An apparatus for selectively setting and displaying a relay element for an electronic motor protecting relay comprises a display unit(1), a setting switch(2), a controlling unit(3), and a storing unit(4). The display unit displays unique identification data at each relay element and the activation of a corresponding relay element. The setting switch selectively sets the activation of the corresponding relay element for a displayed relay element. The controller is connected to the display unit and the setting switch and outputs a display control signal. Information about the activation of the relay element is stored. The storing unit is connected to the controller and supplies the unique identification data of the relay element and a stored data about the activation of the corresponding relay element to the controller. The storing unit stores the unique identification information of the relay element and new information about the activation of corresponding relay element.

Description

Selective display and setting device of relay element for electronic motor protection relay {SELECTIVE SETTING AND SAVING APPARATUS OF PROTECTION FOR ELECTRONIC MOTOR PROTECTION RELAY}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic motor protection relay, and more particularly, to a selection display and setting device for an electronic motor protection relay relay element capable of selecting and setting an active state for each relay element and storing and displaying corresponding setting information.

Electronic motor protection relays are installed in the power circuit of the power system to check for abnormal conditions such as over current, phase deficiency, inverse phase, unbalance among phases, and ground faults. It compares the status information by the detected current detected through the current transformer installed on the circuit with the preset reference information to determine whether it is abnormal, and can send the cutoff control signal to the circuit breaker to cut off the power circuit when a failure occurs in the power circuit. In addition, the monitoring and control device for a power system of a power system having a microprocessor or a logic circuit element and a display element capable of displaying the abnormality and status information.

In the prior art of such an electronic motor protection relay, the user selectively controls or monitors according to various field environments in which failures or control objects to be monitored that occur among various relay elements, that is, the control / monitoring functions performed by the electronic motor protection relay are different. The relay element could not be set, and accordingly, there was a problem that the electronic motor protection relay could not monitor / control the power circuit according to the setting information of the relay element set appropriately for the use environment.

Accordingly, the present invention solves the problems of the prior art, an object of the present invention, in the electronic motor protection relay having a limited input and output means, to provide a variety of relay elements to the user, the operation is optimized for the user environment It is possible to provide a selection display and setting device for a relay element for an electronic motor protection relay capable of selectively setting the relay element to be controlled or monitored.

An object of the present invention, in the selection display and setting device of the relay element for an electronic motor protection relay,

A display unit displaying unique identification information for each relay element and whether the corresponding relay element is active;

A setting switch for providing a means for the user to selectively set whether the relay element is activated or not for the relay element selectively displayed by the display unit;

A relay connected to the display unit and the setting switch and outputting a display control signal to the display unit to display the unique identification information for each relay element and whether the corresponding relay element is active according to the set and stored information, and the relay provided from the setting switch. A control unit for outputting information indicating whether the element is active; And

Connected to the control unit to provide the controller with unique identification information for each relay element and previously stored information about whether the corresponding relay element is active, or newly set information for the unique identification information for each relay element and whether the corresponding relay element is activated. It can be achieved by providing a selection display and setting device of the relay element for an electronic motor protection relay according to the invention, characterized in that it comprises a storage means for storing the.

The selection display and setting device of the relay element for an electronic motor protection relay according to the present invention uses a display unit, a setting switch, a control unit and a storage unit to display the unique identification information for each relay element and whether the corresponding relay element is active. By the setting switch, the user can selectively set whether the relay element is activated according to the use environment of the electronic motor protection relay, and save the setting information to apply to the monitoring and control of the power circuit afterwards. The effect can be obtained.

In the selection display and setting device of the relay element for an electronic motor protection relay according to the present invention, the setting switch is composed of a push button switch (PUSH BUTTON SWITCH), and the control unit presses the push button switch according to a processing program provided therein. When the time is equal to or longer than the predetermined reference time, the change of the activation of the relay element is determined. Therefore, the simple configuration allows the user to easily set the relay element and minimize the increase in manufacturing cost of the electronic motor protection relay. You can get it.

The selection display and setting device of the relay element for an electronic motor protection relay according to the present invention comprises a light emitting element in which the display unit is repeatedly lit a predetermined number of times according to the relay element, so that the electronic motor protection relay already displays other information. Since a light emitting device that can exist or be installed at a low price can be used, an increase in manufacturing cost of the electronic motor protection relay can be minimized.

The selection display and setting device of the relay element for an electronic motor protection relay according to the present invention includes one display because the display unit is composed of a liquid crystal display for displaying the unique information predetermined for each relay element and whether the relay element is active. Since the device can display both the unique information of the relay element and the information on whether the corresponding account element is active, there is an effect of providing convenience for the user to easily check the corresponding information.

1 is a block diagram showing the configuration of a selection display and setting device of a relay element for an electronic motor protection relay according to a preferred embodiment of the present invention;
2 is a flowchart illustrating a procedure of selecting and displaying a selection element of a relay element for an electronic motor protection relay according to a preferred embodiment of the present invention.

The object of the present invention and the constitution and effects of the present invention to achieve the same will be more clearly understood by the following description of the preferred embodiment of the present invention with reference to the accompanying drawings.

First, referring to FIG. 1, which is a block diagram showing the configuration of a selection display and setting device of a relay element for an electronic motor protection relay according to a preferred embodiment of the present invention.

As shown, the selection display and setting device of the relay element for an electronic motor protection relay according to a preferred embodiment of the present invention includes a display unit 1, a setting switch 2, a control unit 3, a storage means 4, a power source. The control unit 5 may be configured to further include a current transformer and a current input unit 6, a current and time setting unit 7, and a contact output unit 8.

The display unit 1 is means for displaying the unique identification information for each relay element, i.e., the function to be controlled and monitored by the electronic motor protection relay, and whether the corresponding relay element is active. It may be composed of a light emitting diode, and may be composed of a liquid crystal display. As the display unit 1, the light emitting element can display unique identification information for each relay element by repeatedly lighting the predetermined number of times under the control of the control unit 3. As the display unit 1, the liquid crystal display may display predetermined unique information for each relay element and information on whether the corresponding relay element is active at a time.

The setting switch 2 provides a means for the user to selectively set whether the relay element is activated or not for the relay element selectively displayed by the display unit 1. In other words, the user can selectively set whether to enable or disable the corresponding function for each relay element by operating the setting switch 2. The setting switch may be configured as a push button switch according to a preferred embodiment.

The control unit 3 is connected to the display unit 1 and the setting switch 2, and the display control signal is displayed on the display unit 1 to display the unique identification information for each relay element and whether the corresponding relay element is active according to the set and stored information. And outputs to store the activation information on the relay element provided from the setting switch (2). In addition to the display unit 1 and the setting switch 2, the control unit 3 includes a storage means 4, a power supply operation unit 5, a current transformer and a current input unit 6, and a current and time setting unit 7 as shown in FIG. ), The contact output section 8 is further connected. The controller 3 may be configured as a microprocessor or a logic circuit according to an embodiment. The control unit 3 is provided by the current transformer and the current input unit 6 to perform the functions of monitoring and control, which is generally performed by the electronic motor protection relay, in addition to the information processing function of the activity of each relay element which is directly related to the present invention. Based on the current detection signal of the phase power circuit, it determines the occurrence of faults such as overcurrent, current unbalance, reverse phase, ground fault, etc. The display unit 1 is controlled to display the unique information for each fault such as overcurrent, current unbalance, reverse phase, and ground fault, which are causes of the failure. In addition, the controller 3 may basically perform a control function of supplying or stopping electric power to the motor connected through the contact output unit 8. In order to perform the function of setting whether the relay element is active according to the present invention, the controller 3 is the setting switch 2 to determine whether the relay element is active when the push time of the pushbutton switch is equal to or longer than a predetermined reference time. Determine the change.

The storage means 4 is connected to the control part 3, and provides the control part 3 with the unique identification information for every relay element and the already stored information about whether the said relay element is active, or the unique identification information for every relay element, Stores newly set information about whether the relay element is active. The storage means 4 may be composed of an EEPROM and a flash memory which can be read and written according to a preferred embodiment.

The power supply control unit 5 may be configured as a power switch capable of turning on or off the electronic motor protection relay. The power control unit 5 may be configured as a power switch connected to a DC power supply circuit that converts commercial AC power into DC and supplies or cuts the corresponding DC power to circuit components of the electronic motor protection relay. The power supply operation unit 5 can be connected to the control unit 3 to indicate an on or off state of the electronic motor protection relay as a low potential signal or a high potential signal, so that the control unit 3 can receive a signal from the power supply operation unit 5. The controller determines whether the current electronic motor protection relay is in an on state or an off state according to whether the low potential signal or the high potential signal is present. After the new setting, the setting may be applied to determine whether the control unit 3 newly controls the electronic motor protection relay.

The current transformer and the current input unit 6 convert the analog current detection signals of the three current transformers and the three-phase power circuits detected by the current transformers into digital signals so as to correspond to the three-phase power circuits, and provide them to the controller 3. It may be composed of a circuit portion.

The current and time setting section 7 compares the current detection signals of the three-phase power circuit inputted from the current transformer and the current input section 6 by the control section 3, such as the rated current of the motor, the reference current for determining the occurrence of ground fault, and the like. As a means for setting a reference value for determining (above) and various reference times, it may be composed of a plurality of variable resistors provided for each function in an embodiment.

The contact output section 8 is a contact signal output circuit section for outputting a contact control signal to a relay contact capable of opening and closing a line for supplying power to an electric motor not shown in the drawings. The relay contact is opened and closed according to the control signal to drive or stop the motor.

The selection display and setting operation of the relay element selection and the setting element of the relay element for an electronic motor protection relay according to the present invention configured as described above will be described with reference to FIGS. 1 and 2.

First, in a state where the motor is stopped, when the user presses the setting switch 2 for a predetermined time or more, for example, 600 milliseconds or more, the electronic motor protection relay switches to the contact test mode, and in that mode, the specific color of the display unit 1. A light emitting element (for example, green) emits light to indicate that it is in a corresponding mode.

In this contact test mode, the electronic motor protection relay is operated by turning off the electronic motor protection relay by operating the power supply operation part 5, and then operating the power supply operation part 5 again while turning on the electronic motor protection relay while the setting switch 2 is pressed. The relay element selection and setting mode related to the above are entered.

In this relay element selection and setting mode, the control unit 3 reads the unique identification information (data) for each relay element stored in the storage means 4 and information on whether the relay element is active, and the corresponding unique identification information and whether it is active. The information is displayed by the display unit 1 (ST1 in FIG. 2). In this case, the unique identification information for each relay element includes monitoring functions of an electronic motor protection relay for each abnormal state such as over current, phase deficiency, inverse phase, unbalance among phases, and ground fault. The order uniquely assigned to each function may be configured as information on a lighting method of the three color light emitting elements of the display unit 1. That is, if the overcurrent monitoring and protection function is the relay element 1, the relay element 1 may be displayed as the number of repetitions of the light emitting element of a specific color. For example, if the red LED is turned on (0.4 seconds), then the green LED is turned on (0.4 seconds), and then the red LED is turned on again (0.4 seconds), the red LED is turned on once. It is. If the phase monitoring and protection function is relay element 2, for example, red light on (0.4 sec), green light on (0.4 sec), then red light on (0.4 sec), green light on (0.4 sec) When the red light emitting device is turned on again (0.4 seconds), the red light emitting device is turned on twice, which means that the relay element 2 is interpreted.

In addition to the display of the unique identification information for each relay element, an indication of whether the relay element is active or not is additionally performed. That is, after the repeated display of the specific color light emitting device indicating the unique identification information for each relay element, whether the activity of the corresponding relay element may be distinguished and displayed by the lighting of the light emitting device of the specific color. That is, when the relay element is selected and stored as the active information as the previous information, the green light emitting device is turned on, and when the selected and stored as the disabled, the red light emitting device is turned on.

Next, the process proceeds to step 2 (ST2) in Figure 2, it is possible to set whether or not the relay element is active. In such a setting method, when the setting switch 2 of FIG. 1 is briefly pressed for 0.4 seconds or less, the control unit 3 determines that the user wants to change and set the information of the activation. Of course, if you do not want to change the information on whether it is active, you do not have to press the setting switch 2.

Next, the process proceeds to step 3 (ST3) in Figure 2, it can be stored in the storage means 4, the information on whether the relay element is active. That is, when the user presses and holds the setting switch 2 of FIG. 1 for 1 second, the control unit 3 determines that the user wants to store information of whether the user is active, and stores the information in the storage means 4.

Next, proceeding to step 4 (ST 4), the control unit 3 determines whether the setting for all relay elements is completed. This operation can be easily determined by comparing the information of the total number of the relay elements preset and the relay element sequence information according to the unique identification information of the relay element currently displayed.

If the setting for all relay elements is not completed, i.e., if NO is determined in step 4 (ST 4) of FIG. 2, the operation of step 1 (ST 1) to step 3 (ST 3) is performed for the next relay element. Repeat it.

When the user operates the power control unit 5 of FIG. 1 to turn the electronic motor protection relay off and on, that is, on and off, the control unit 3 performs the relay operation ( Monitoring and control of the power circuit).

As described above, the selection display and setting device of the relay element for an electronic motor protection relay according to the present invention uses a display unit, a setting switch, a control unit, and a storage unit to determine the unique identification information for each relay element and whether the corresponding relay element is active. It can be displayed to the user, and the user can selectively set whether to activate each relay element by the setting switch to be optimized according to the use environment of the electronic motor protection relay, and save the setting information to monitor and monitor subsequent power circuits. The effect that can be applied to the control can be obtained.

In the selection display and setting device of the relay element for an electronic motor protection relay according to the present invention, the setting switch 2 is constituted by a push button switch, and the control unit is configured according to a processing program included in the push button switch. When the press time is equal to or longer than the predetermined reference time, the change of the activation of the relay element is determined. Therefore, the user can easily set the relay element with a simple configuration, and the increase in manufacturing cost of the electronic motor protection relay can be minimized. Can be obtained.

The selection display and setting device of the relay element for an electronic motor protection relay according to the present invention is constituted by a light emitting element in which the display unit 1 is repeatedly lit a predetermined number of times according to the relay element, so that other information is already displayed on the electronic motor protection relay. It is possible to use a light emitting device that exists for or can be installed at a low price, it is possible to obtain an effect that the increase in the manufacturing cost of the electronic motor protection relay can be minimized.

The selection display and setting device of the relay element for an electronic motor protection relay according to the present invention includes a liquid crystal display in which the display unit 1 displays predetermined unique information for each relay element and information on whether the relay element is active. Since the display device can display both the unique information of the relay element and the information on whether the corresponding account element is active, there is an effect of providing convenience for the user to easily check the information.

1: display part 2: setting switch
3: control unit 4: storage means
5: power control unit 6: current transformer and current input unit
7: Current and time setting section 8: Contact output section

Claims (4)

In the selection display and setting device of the relay element for an electronic motor protective relay,
A display unit displaying unique identification information for each relay element and whether the corresponding relay element is active;
A setting switch for providing a means for the user to selectively set whether the relay element is activated or not for the relay element selectively displayed by the display unit;
A relay connected to the display unit and the setting switch and outputting a display control signal to the display unit to display the unique identification information for each relay element and whether the corresponding relay element is active according to the set and stored information, and the relay provided from the setting switch. A control unit for outputting information indicating whether the element is active; And
Connected to the control unit to provide the controller with unique identification information for each relay element and previously stored information about whether the corresponding relay element is active, or newly set information for the unique identification information for each relay element and whether the corresponding relay element is activated. Selecting display and setting device of the relay element for an electronic motor protection relay, characterized in that it comprises a storage means for storing. The method of claim 1,
The setting switch is composed of a push button switch (PUSH BUTTON SWITCH),
The control unit is a selection display of the relay element for a motor protection relay, characterized in that the control unit having a processing program for determining whether to change the activation of the relay element when the push time of the push button switch is equal to or greater than a predetermined reference time. And setting device. The method of claim 1,
The display unit,
A selection display and setting device for a relay element for an electronic motor protection relay, comprising: a light emitting element that repeatedly lights up a predetermined number of times according to the relay element. The method of claim 1,
The display unit,
Selective display and setting device of the relay element for an electronic motor protection relay, characterized in that consisting of a liquid crystal display for displaying the predetermined unique information for each relay element and whether the relay element is active.

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