JPH01285820A - Display device for measurement - Google Patents

Abstract

PURPOSE:To make it possible to display measured values in a plurality of kinds sequentially in continuation by one operation, by providing a means to select the measured values sequentially in continuation, an operating element to start this means, and a means to set reference values for the measured values beforehand. CONSTITUTION:In a memory of a control element, a reference value for each kind of measured values is stored beforehand. When a measured value selection switch 51 is operated by one time Sw, a plurality of kinds of measured values are selected sequentially and displayed in a digital display element 2 and an analog display element 3 in continuation, while a measured value selection display lamp (LED) 52 is lighted. The display time for each measured value is the same time (t). When some measured value exceeds the reference value thereof stored in the memory, a bar graph of the display element 3 is displayed in a flickering manner. This display continues until a reset switch 68 is operated and the display time thereof is t1(>t). When the switch 68 is operated, the flickering display of the bar graph is discontinued and measured values of a subsequent kind are displayed. In succession, measured values of another kind are displayed 2,3 sequentially.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a measurement and display device that is mounted on, for example, power receiving and transforming equipment to measure the amount of electricity on a power receiving and transforming membrane.

[Conventional technology]

FIG. 4 is a front view of the measurement display device mounted on the closed switchboard. On the front of the measurement display device l, there are a digital display section 2 that digitally displays the measured amount of electricity on a liquid crystal, an analog display section 3 that displays the measured amount of electricity on a liquid crystal display as a percentage bar graph, and from the R, S, and i' phases. an R-phase current selection switch 4 for selecting the three-phase R-phase current to be displayed; an R-phase current indicator 5 consisting of an LED indicating that the R-phase current is being displayed
S-phase current selection switch 6 for selecting to display S-phase current
, consisting of an LED indicating that the S phase current is displayed.
A phase current indicator light 7, a T-phase current selection switch 8 for selecting the T-phase current without displaying it, a T-phase current indicator light 9 consisting of 1, ED to indicate that the T-phase current is being displayed, and a T-phase current indicator light 9 for T and R phases. T to select to display line voltage, R phase line voltage selection switch 10, S, ]゛S to select to display phase line voltage;
T-phase line-to-line voltage selection switch 11; R- and S-phase line-to-line voltage selection switch 12 for selecting the line-to-line voltage of R and S phases without displaying them;
, a power factor selection switch 13 that selects the power factor without displaying it, and an electricity amount selection switch 7 and 1 that selects the power amount without displaying it.
4. Power selection switch 15 to select JR to display power
, a frequency selection switch 16 for selecting a frequency to display.
, a reactive power selection switch 17 that selects to display reactive power, a reactive power selection switch 218 that selects not to display reactive power, and a reset 71 of the display state due to the operation of various external protection relays. A seven-way switch 19, a check switch 20 for checking the system, a direct operation selection tR switch 21 for selecting direct operation, a direct operation indicator light 22 consisting of L li Ll for indicating direct operation 1, and a speed operation for selecting remote operation. A selection screen 23, a remote operation indicator light 24 consisting of an LED that indicates remote operation, a breaker closing switch 25 for closing the circuit breaker, and a breaker closing display consisting of an ED that does not indicate the closing state of the circuit breaker. A light 26, a circuit breaker disconnection switch 27 for disconnecting the circuit breaker, and a circuit breaker disconnection indicator light 28 consisting of an LED that indicates the disconnection state of the circuit breaker.
, and 1, Fll, which displays the operation of the external overcurrent relay.
Many selections such as overcurrent relay indicator light 29 consisting of
´ ・A switch and indicator light are provided.

Figure 5 shows the measurement display device mounted on a closed switchboard.
FIG. The measurement display device 1 internally includes a signal output section 30, an A/D (analog/digital) conversion section 31, a control section 32 consisting of a CPU, an analog output section 33, a measurement display selection section, an operation control section 34, and PT ratio, C
The output of the input/output section 30 is input to the A/D conversion section 31, and the output of the A/11 conversion section 31 is input to the control section 32. Further, the output of the human output section 30 is inputted to the control section 32, and the output of the control section 32 is inputted to the input/output section 30. The output of the control section 32 is input to an analog output section 33. Further, the output of the control unit 32 is sent to the measurement display selection unit, the operation control unit 34, the measurement display selection unit,
The output of the operation control section 34 is mutually input to the control section 32. The output of the PT ratio and CT ratio setting section 35 is input to the control section 32 .

The power supply bus P connected to the closed distribution board B is connected to the main circuit breaker 3.
6 and is connected to the feeder line 7!1, and the feeder line 1
A current transformer 37 and a zero-phase current transformer 45 are provided. A transformer 38 is connected to the power supply bus E, and the output of the transformer 3B is input to an overvoltage relay 48 and a low voltage relay 49\. The output of the current transformer 37 is input to an overcurrent relay 47, and the outputs of this overcurrent relay 47 and the transformer 38 are input to the input/output section 30. Also, transformer 3
8 and the output of the zero-phase current transformer 45 are both input to a ground fault direction relay 46. Also, overcurrent relay 47
, the ground fault direction relay 46 , the low voltage relay 4 ; ), and the overvoltage relay 48 . Furthermore, the auxiliary contact signal 40 related to the closing and closing of the main circuit breaker 13G is sent to the input/output section 30.
is being input to. The measurement display device l shows current A, voltage ■,
A measurement output signal 41 of the Le 1 measured values of power W, @dynamic power V # F + power factor PF, frequency F, and power 11111 is output. It also outputs a command signal 42 for turning on and off the main circuit breaker 36. The measurement display device 1 is connected to a control section tj, 43 that supplies power thereto.

Next, the operation of this measurement display device will be explained with reference to FIG.

When measuring the R-phase current, the R-phase current selection IR switch 4 is operated. As a result, the R phase current indicator light 5 lights up and 2
, the R-phase current measurement value is displayed on the digital display section 2 and the analog display section 3 in digital form and as a percentage half graph. Next, for example, S.

] When measuring the line voltage between phases, when the S and T phase line voltage selection switch 11 is operated, the ruti current indicator lamp 5 that was lit up until then turns off, and the digital display section 2 and analog The display section 3 displays the line voltage between the s and 'r phases. Similarly, the measured values of other quantities of electricity are displayed by selectively operating the corresponding selection switch.

[Problem to be solved by the invention]

In conventional measurement and display devices, when displaying 81 measured values of multiple types of electrical quantities on a digital or analog display, a selection switch that selects the electrical quantity to be measured is sequentially selected from a large number of selection switches. There is a problem that the operation is troublesome.

In view of such problems, the present invention sequentially displays a plurality of types of measured values on a display section by one operation of a measured value selection switch,
It is an object of the present invention to provide a measurement display device that blinks when a measured value exceeds a reference value.

(Means for Solving the Problems) The one-measurement display device according to the present invention has a single step of selecting a plurality of types of measured values S: #!, followed by selecting tR for selecting ε-measured values, and Measurement value selection to activate the measurement value selection 1 stage ↑J
(An operation section, a reference value setting means for presetting a reference value for the 81 measured value, a means for flashing on the display when the measured value exceeds the reference value, and a table 1) To stop the flashing display, to display other measured values, to start the rear 2. control means and a reset operation section for activating the reset means.

[For A] When the a1 measurement value selection operation section is operated, the measurement value selection means is started, and the B1 measurement value selection means displays multiple types of measurement values on the display section [
Select to display this in sequence. If the measured value exceeds a preset reference value, it will blink on the display. When you operate the reset operation part, lyse, 1st stage, 1st stage starts,
The reset means causes the blinking display to blink and starts displaying other measured values.

〔Example] The present invention will be described in detail below with reference to drawings showing embodiments thereof.

FIG. 1 is a front view of a measurement display device according to the present invention. On the front of the measurement display device 1, there are a digital display section 2 that digitally displays the measured amount of electricity on a liquid crystal, and an analog display section 3 that displays the measured amount of electricity on a liquid crystal display as a percentage bar graph.
R111 current selection switch 4 selected to display three-phase R-phase current consisting of S and T phases, R-phase current indicator 5 consisting of an LED indicating that R-phase current is displayed, and S-phase current displayed. Select as much as possible 5IIli style selection switch, 5
1, S phase current indicator light 7 consisting of ED, T phase current selection switch 8, which selects to display T phase current; 1" phase current indicator light 9 consisting of LED (not shown), 1", R phase line voltage selection switch 10, selected to display the line voltage of T, I'? phase, line voltage selection switch 10 of S, T phase. S, T phase line voltage selection switch 11 selected to display, R, S phase line voltage selection switch 12 selected to display R, S phase line voltage, power factor selected to display power factor. rate selection switch 13, power selection switch 14 for selecting to display power, power selection switch I5 for selecting not to display power, frequency selection switch 16 for selecting to display frequency, displaying reactive power. Reactive power selection switch 17 to select the amount of reactive power to be displayed, reactive power selection switch 18 to select to display the reactive power, reset operation display of various externally provided protection relays 19
, a check switch 20 for checking the system, a direct operation selection switch 21 for selecting direct operation, a direct operation indicator light 22 consisting of an LED for indicating direct operation, a remote operation selection switch 23 for selecting remote operation, and a remote operation selection switch 23 for indicating remote operation. A remote control indicator light 24 consisting of an LED, a circuit breaker closing switch 25 for closing the circuit breaker, a circuit breaker closing indicator light 26 consisting of an LED indicating the closing state of the circuit breaker, and a circuit breaker shutoff switch for closing the circuit breaker. 27. Circuit breaker closing indicator light consisting of an LED that indicates the circuit breaker's disconnected state (28, evening)
An overcurrent relay indicator light 2 () consisting of an LED that indicates the operation of an overcurrent relay installed in the section, continuously selects multiple types of measured values to be displayed on the digital and analog display sections 2 and 3. A measurement value selection switch 51, a measurement value selection indicator light 52 indicating that a measurement value is being displayed by the measurement value selection switch 51, and a plurality of types of 81 measurement contents are each displayed over a preset reference value. A reset switch 68 that stops the flashing display operation and starts displaying another measurement value when the display blinks on the display, and a reset indicator light 69 consisting of an LED that indicates that the reset switch 68 has been operated are provided. ing.

The measurement display device 1 configured as described above includes an input/output section 30 shown in FIG. It has a measurement display selection section, an operation control section 34, and a PT ratio and CT ratio setting section 35, and has the same configuration as that shown in FIG. Reference values for a plurality of types of measured values can be stored in advance in a memory (not shown) of the control unit 32. Furthermore, when the measurement value selection switch 51 is operated, the measurement display selection section and the operation control section 34 display a plurality of types of measurement values on the digital display section 2 or the analog display section 3.
It is designed to be selected sequentially in order to be displayed in
Furthermore, if the measured value exceeds the base fp value, a blinking display will be displayed on the analog display section 3, and if the reset switch 68 is further operated, the blinking display on the analog display section 3 will be stopped. At this point, the display of other measured values starts.

Figure 2 shows ζ when the resistance value selection switch 51 is operated.
3 is a flowchart in which a plurality of types of measured values are displayed on a display unit. Now press the measurement value selection switch 51 once Sw
Then, for example, first the R-phase current is displayed as 1, then the S-phase current is displayed as 2, the T-phase current is displayed as 3, the R and S phase line-to-line pressure is displayed as 4, and the S, TIt1 interval is displayed. 5 on the voltage display,
T, R$ [] 6 for line voltage display, 7 for power display, 8 for power consumption display, 9 for power factor display, reactive power display KI
O2 reactive power amount display Kll, frequency display line 12). The display time of each month's measured value is the same.

FIG. 3 is a flowchart 1 in which the measured value selection switch 51 shown in FIG. 1 is operated once to successively select measured values. That is, by one operation S8 of the measurement value selection switch 51, for example (1 for the JR phase current display and 2 for the S phase current display, the 31 measurement value of the 'I' phase current is selected, and the measurement value is For example, the bar graph on the analog display 3 will continue to flash until the reset switch 68 is operated. , its display time is t, which is longer than t. When the reset switch 68 is operated, the flashing display of the half graph is stopped, the R and S phase line pressure display 1<4 starts, and the other measured values are sequentially displayed again, and the reactive energy is displayed. Kll, 12 for frequency display
will be done.

In this way, in this measurement display device, a plurality of types of measurement values are sequentially and continuously displayed on the digital display section 2 and the analog display section 3 for a predetermined period of time by one operation of the measurement value selection switch 51. When the measured value of 81 exceeds a preset reference value, a blinking display is displayed on the analog display section to notify that the measured value of 81 is excessive. Then, the blinking display continues until the reset switch 68 is operated, and when the reset switch 68 is operated, the blinking display is stopped and another measurement resistance value is displayed.

Note that by operating a selection switch for selecting a plurality of types of individual measurement values without operating the measurement value selection switch 51, the measurement values selected by the selection switch can be displayed as in the conventional case.

In this embodiment, a device for measuring and displaying the quantity of electricity of a closed switchboard, which is the power receiving equipment, has been described. The same effect can be obtained. Also, in this embodiment, the bar graph is made to blink, but
The digital display unit may be displayed blinking.

〔Effect of the invention〕

As described in detail above, according to the present invention, multiple types of measured values can be sequentially and continuously displayed by operating the measured value selection switch, and the selection switch may be operated frequently to avoid selecting multiple types of measured values. You can eliminate the hassle. In addition, when a measured value exceeds a preset standard value, it will flash on the measured value display, allowing you to monitor and understand the measured value efficiently, which is an excellent effect that can significantly save labor during one measurement. play.

[Brief explanation of the drawing]

Fig. 1 is a front view of a measurement display device according to the present invention, Figs. 2 and 3 are block diagrams of a measurement value display operation, Fig. 4 is a front view of a conventional measurement display device, and Fig. 5 is a closed view. FIG. 2 is a block diagram of a measurement display device mounted on a switchboard. l...Measurement display device 2...Digital display section 3.
・Analog display section 4...R111 current selection switch・
5...R phase current indicator light 10...T, R phase line voltage selection switch 14...Power amount display selection switch 32...Control unit 51...Measurement value selection switch 5
2...Measurement value selection indicator light 68...Reset switch 69...Reset indicator light In the drawings, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. In a measurement display device that selectively displays a plurality of types of measurement values on a display section, a measurement value selection means that sequentially and continuously selects a plurality of types of measurement values to be displayed on the display section. , a measurement value selection operation unit that starts the measurement value selection unit, a reference value setting unit that presets a reference value for the measurement value, a unit that causes the display unit to display a blinking display when the measurement value exceeds the reference value, and a display. 1. A measurement display device comprising: a reset means for stopping a blinking display in the section and starting displaying another measurement value; and a reset operation section for activating the reset means.