JPH0644339U - Monitoring device - Google Patents

Abstract

(57) [Summary] [Purpose] The installation work should be easy and the construction time should be shortened, and additional equipment and space should not be required. [Structure] The monitoring device 1 is provided with various external contact output forms provided in various devices 2 and a ZCT of a zero-phase current transformer (ZCT) 3.
In addition to providing a signal input mode setting switch 4 for setting to correspond to an output signal, a two-pole input terminal 5 that enables input of each output signal, and a contact output signal and a ZCT output signal from the input terminal 5 are provided. A corresponding input switching unit 6,
The setting state of the signal input mode setting switch 4 and the contact input unit 7 for inputting the contact output signal input to the input switching unit 6 and the ZCT input unit 8 for inputting the ZCT output signal are determined, and the input switching unit 6 is determined. A central control unit 9 for transmitting data,
The display unit 10 for monitoring each output signal is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a monitoring device that monitors a contact output signal from various devices and a ZCT output signal from a zero-phase current transformer (ZCT).

[0002]

[Prior art]

 Conventionally, contact output signals from non-voltage a-contact alarm output, non-voltage b-contact alarm output, no-voltage a-contact one-shot pulse alarm output, and no-voltage a-contact state output from various devices, and zero-phase current change In the monitoring device that monitors the ZCT output signal of the ground fault alarm output from the container (ZCT), the no-voltage a-contact alarm output 21 can be directly input to the alarm input terminal ch1 of the monitoring device 22a as shown in FIG. Therefore, the no-voltage b-contact alarm output 23 and the no-voltage a-contact one-shot pulse alarm output 24 were input to the alarm input terminal ch1 of the monitoring device 22a via the contact signal converter 25 equipped with a relay circuit. Further, since the display operation is different between the alarm display and the status display, the non-voltage a-contact status output 26 is input to the status input terminal ch2, not the alarm input terminal ch1 of the monitoring device 22b. On the other hand, the ground fault alarm output 27 was input from the zero-phase current transformer (ZCT) 28 to the alarm input terminal ch1 of the monitoring device 22a via the ground fault alarm 29.

[0003]

[Problems to be solved by the device]

 However, according to the above conventional example, the no-voltage b contact alarm output 23 and the no-voltage a contact one-shot pulse alarm output 24 are the contact signal converter 25 equipped with a relay circuit, and the ground fault alarm output 27 is a zero phase. Since it is necessary to input the current from the current transformer (ZCT) 28 to the alarm input terminal ch1 of the monitoring device 22a via the ground fault alarm 29, not only is the installation operation time-consuming, time-consuming, and costly, but it is not practical. Is difficult to arrange for the workers who perform connection and setting work, and if there are no-voltage b-contact alarm output 23 and no-voltage a-contact one-shot pulse alarm output 24, wiring mistakes may occur. In addition, there is a drawback that a special space is required for installing the contact signal converter 25 and the ground fault alarm 29. Further, since the no-voltage a-contact state output 26 cannot be input to the alarm input terminal ch1 of the monitoring device 22a, it must be input to the state input terminal ch2 of the monitoring device 22b, and the alarm display and the status display are mixed. Then, there is a drawback that a wiring error may occur.

Therefore, the present invention provides a monitoring device that is easy to install, shortens the construction time, and does not require extra space.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the monitoring device of the present invention is set so as to correspond to a contact output signal of each external contact output type provided in various equipment and a ZCT output signal of a zero-phase current transformer (ZCT). In addition to providing a signal input mode setting switch, a two-pole input terminal that allows each output signal to be input, an input switching unit corresponding to the contact output signal and ZCT output signal from the input terminal, and the input switching unit A contact input section that inputs the input contact output signal, a ZCT input section that inputs the ZCT output signal, a central control section that determines the setting state of the signal input mode setting switch and sends data to the input switching section, respectively. And a display unit for monitoring the output signal of the.

[0006]

[Action]

 Set the signal input form setting switch for each contact output signal of the external contact output form of various equipment and ZCT output signal of the zero-phase current transformer (ZCT), and set the setting state of the signal input form setting switch to the central control unit. The data of the setting state of the signal input mode setting switch is transmitted to the input switching section, and the input switching section uses the data to output the contact output signal of each external contact output mode and the ZCT of the zero-phase current transformer (ZCT). The contact output signal input to the two-pole input terminal is switched to correspond to the output signal, and the ZCT output signal is displayed on the display unit from the input switching unit to the contact input unit, and the ZCT output signal from the input switching unit to the ZCT input unit. To be done.

[0007]

【Example】

 An embodiment of a monitoring device according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an explanatory diagram of a monitoring device according to the present invention, FIG. 2 is an explanatory diagram of a monitoring device installed in various devices, and the monitoring device 1 shown in FIG. 1 is various devices 2 shown in FIG. In addition to providing the contact output signals of the external contact output form and the ZCT output signal of the zero-phase current transformer (ZCT) 3 provided in the Input terminal 5 for inputting, input switching section 6 corresponding to the contact output signal and ZCT output signal from the input terminal 5, and the contact output signal input to the input switching section 6 The contact input section 7 and the ZCT input section 8 for inputting the ZCT output signal, the central control section 9 for discriminating the setting state of the signal input mode setting switch 4 and transmitting the data to the input switching section 6, and the respective output signals. Display unit 10 for monitoring Is provided and configured.

The monitoring device 1 shown in FIG. 2 includes a no-voltage a-contact alarm output 11, a no-voltage b-contact alarm output 12, a no-voltage a-contact one-shot pulse alarm output 13, and a no-voltage a a The contact output signal of the external contact output form of the contact state output 14 and the ZCT output signal of the ground fault alarm output 15 from the zero-phase current transformer (ZCT) 3 are set by the signal input form setting switch 4 composed of 3 bits. The contact output signal input to the two-pole input terminal 5 is displayed on the display unit 10 from the input switching unit 6 to the contact input unit 7, and the ZCT output signal is input from the input switching unit 6 to the ZCT input unit 8. Is displayed.

In the above embodiment, the signal input form setting switch 4 uses a DIP switch composed of 3 bits, but this is an example, and the signal input form setting switch 4 is limited to 3 bits. However, a plurality of bits other than 3 bits can be used, and the DIP switch is not limited to this, and can be appropriately changed without departing from the object of the present invention.

[0011]

[Effect of device]

 As described above, the monitoring device of the present invention is set so as to correspond to the contact output signal of the external contact output form and the ZCT output signal of the zero-phase current transformer (ZCT) provided in various devices. In addition to providing a signal input mode setting switch, a two-pole input terminal that enables input of each output signal, an input switching section corresponding to the contact output signal and ZCT output signal from the input terminal, and the input switching section A contact input section for inputting the input contact output signal and a ZCT input section for inputting the ZCT output signal, a central control section for discriminating the setting state of the signal input state setting switch and transmitting data to the input switching section, Since it is configured by providing a display section for monitoring each output signal, contact output signal of non-voltage b contact alarm output and no voltage a contact one shot pulse alarm output and ground fault alarm output The ZCT output signal can be installed without installing a contact signal converter or a ground fault alarm, and can also use the same input terminal as the alarm input for the contact output signal of the no-voltage a contact state output. The work is easy and the construction time is significantly shortened, and there are excellent effects such as reduction of wiring mistakes.

[Brief description of drawings]

FIG. 1 is an explanatory view of a monitoring device according to the present invention.

FIG. 2 is an explanatory diagram of a monitoring device installed in various devices.

FIG. 3 is an explanatory diagram of a conventional monitoring device.

[Explanation of symbols]

1 ... Monitoring device, 2 ... Various devices, 3 ... Zero-phase current transformer (ZCT), 4 ... Signal input form setting switch,
5 ... Input terminal, 6 ... Input switching unit, 7 ... Contact input unit, 8 ... ZCT input unit, 9 ... Central control unit,
10 ... Display unit, 11 ... No-voltage a-contact alarm output,
12 ... No voltage b contact alarm output, 13 ... No voltage a
Contact one-shot pulse alarm output, 14 ... No voltage a
Contact status output, 15 ... Ground fault alarm output.

Claims (1)

[Scope of utility model registration request] 1. A monitoring device for monitoring a contact output signal from various devices having respective external contact output modes and a ZCT output signal from a zero-phase current transformer (ZCT), the monitoring device being various devices. It is possible to input each output signal while providing a signal input form setting switch for setting corresponding to the contact output signal of each external contact output form and the ZCT output signal of the zero-phase current transformer (ZCT) Two-pole input terminal, and the contact output signal and Z from the input terminal
Input switching section corresponding to CT output signal, contact input section for inputting the contact output signal input to the input switching section, ZCT input section for inputting the ZCT output signal, and setting of the signal input mode setting switch A monitoring device comprising: a central control unit that determines a state and transmits data to the input switching unit; and a display unit that monitors each output signal.