CN203455438U - Direct current loop fuse state monitoring device - Google Patents
Direct current loop fuse state monitoring device Download PDFInfo
- Publication number
- CN203455438U CN203455438U CN201320591171.7U CN201320591171U CN203455438U CN 203455438 U CN203455438 U CN 203455438U CN 201320591171 U CN201320591171 U CN 201320591171U CN 203455438 U CN203455438 U CN 203455438U
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- Prior art keywords
- fuse
- loop
- direct current
- state monitoring
- monitoring device
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Abstract
The utility model discloses a direct current loop fuse state monitoring device composed of a fuse monitoring loop and a warning loop. The fuse monitoring loop is used for monitoring operating states of a fuse, and the warning loop is used for sending a warning signal. The fuse monitoring loop is composed of the fuse XL, a supervisory relay coil J and a capacitor C. The warning loop is composed of a direct current source E, a supervisory relay normally open contact J-1 and a warning device BJ. The states of the fuse can be monitored by the direct current loop fuse state monitoring device, and the warning signal is sent by the monitoring device in time when the fuse is fused, so that the safety and reliability of the operation of a direct current system can be improved. After the fuse is replaced, the signal is automatically reset without the aid of hands, and the direct current loop fuse state monitoring device is easy to operate and convenient to use.
Description
Technical field
The utility model belongs to electric power DC system monitoring technical field, particularly relates to a kind of DC loop fuse state monitoring arrangement.
Background technology
In the loops such as operating transformer station direct current system floating charge motor outlet, fuse is all installed, during these fuse blows, do not have signal to send, because accumulator is standby power supply, charge in batteries loop fault does not have a direct impact substation operation, therefore operations staff is difficult to timely discovery, affects straight-flow system safe operation.
Summary of the invention
In order to address the above problem, the purpose of this utility model is to provide a kind of DC loop fuse state monitoring arrangement.
In order to achieve the above object, the DC loop fuse state monitoring arrangement described in the DC loop fuse state monitoring arrangement that the utility model provides is comprised of fuse monitoring circuit and two loops of alarm circuit; Fuse monitoring circuit is comprised of fuse XL, supervisory relay coil J and capacitor C, and wherein supervisory relay coil J is connected with the two ends of fuse XL respectively with the two ends after capacitor C series connection; Alarm circuit is by direct supply E, supervisory relay normally opened contact J-1, and warning device BJ forms, and wherein supervisory relay normally opened contact J-1 is connected with the positive and negative electrode of direct supply E respectively with the two ends after warning device BJ series connection.
The DC loop fuse state monitoring arrangement that the utility model provides can monitor the state of fuse, sends in time alarm signal after fuse blows, therefore can improve security, the reliability of straight-flow system operation.After change of fuse, signal automatically resets, without hand-reset, simple to operate, easy to use.
Accompanying drawing explanation
The DC loop fuse state monitoring arrangement composition schematic diagram that Fig. 1 provides for the utility model.
The schematic diagram that Fig. 2 applies in storage batteries of transformer substation floating charging loop for the DC loop fuse state monitoring arrangement that the utility model provides.
Embodiment
DC loop fuse state monitoring arrangement the utility model being provided below in conjunction with the drawings and specific embodiments is elaborated.
As shown in Figure 1, the DC loop fuse state monitoring arrangement that the utility model provides is comprised of fuse monitoring circuit and two loops of alarm circuit; Fuse monitoring circuit is for monitoring the running status of fuse, and alarm circuit is used for sending alerting signal;
Fuse monitoring circuit is comprised of fuse XL, supervisory relay coil J and capacitor C; Alarm loop is by direct supply E, supervisory relay normally opened contact J-1, and warning device BJ forms.
Described supervisory relay coil J is connected with the two ends of fuse XL respectively with the two ends after capacitor C series connection; Supervisory relay normally opened contact J-1 is connected with the positive and negative electrode of direct supply E respectively with the two ends after warning device BJ series connection.
In this device, each component function is as follows:
Supervisory relay, when fuse XL fuses, has electric current to flow through in supervisory relay coil J, the actuating of relay, closing relay normally opened contact J-1.While fusing due to fuse XL, the electric current that flows through relay coil J is momentary current, so supervisory relay is selected unicoil magnetic latching relay; Relay coil loses after electric current, and relay normally open contact J-1 still can be closed, and when supervisory relay coil J flows through inverse current, relay contact J-1 opens.
Capacitor C, flows through relay coil J for a long time for large electric current after preventing fuse XL fusing, causes relay coil J to burn.Can provide instantaneous charging and discharging currents for relay simultaneously.
Supervisory relay normally opened contact J-1, for folding alarm circuit, realizes fusing and reports to the police and reset function.
Warning device BJ, for sending alerting signal, can select a sound according to actual conditions, light warning or electric signal is converted into digital signal by analog to digital converter, sends in supervisory system.
Alarm circuit direct supply can adopt external power supply, also can adopt DC loop power supply according to actual conditions.
Fig. 2 is the application implementation row of this device in storage batteries of transformer substation floating charging loop, and the floating charge motor in figure is that as shown in Figure 2, alarm circuit power acquisition charge circuit power supply, illustrates this device principle of work as example for the supply unit of accumulator E charging:
1, when charge circuit is normal, in supervisory relay coil J, no current flows through, and relay normally open contact J-1 disconnects, capacitor C two ends no-voltage.
2, when charge circuit breaks down, make fuse XL when fusing, there is electric potential difference at fuse XL two ends, and to capacitor, C charges, and charging current flows to capacitor C through supervisory relay coil J.Supervisory relay action, normal opened contact J-1 is closed, and warning device BJ starts, and sends alerting signal.Capacitor C two ends produce voltage.
3, when operations staff finds fuse XL fusing, after it is changed.Fuse XL both end voltage reduces, and capacitor C produces discharge current, and due to discharge current and charging current opposite direction, supervisory relay action, disconnects normally opened contact J-1, and warning device BJ resets.
The DC loop fuse state monitoring arrangement that the utility model provides can monitor the state of fuse, sends in time alarm signal after fuse blows, improves security, the reliability of straight-flow system operation.After change of fuse, signal automatically resets, without hand-reset, simple to operate, easy to use.
Claims (1)
1. a DC loop fuse state monitoring arrangement, is characterized in that: described DC loop fuse state monitoring arrangement is comprised of fuse monitoring circuit and two loops of alarm circuit; Fuse monitoring circuit is comprised of fuse XL, supervisory relay coil J and capacitor C, and wherein supervisory relay coil J is connected with the two ends of fuse XL respectively with the two ends after capacitor C series connection; Alarm circuit is by direct supply E, supervisory relay normally opened contact J-1, and warning device BJ forms, and wherein supervisory relay normally opened contact J-1 is connected with the positive and negative electrode of direct supply E respectively with the two ends after warning device BJ series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320591171.7U CN203455438U (en) | 2013-09-24 | 2013-09-24 | Direct current loop fuse state monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320591171.7U CN203455438U (en) | 2013-09-24 | 2013-09-24 | Direct current loop fuse state monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203455438U true CN203455438U (en) | 2014-02-26 |
Family
ID=50135304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320591171.7U Expired - Lifetime CN203455438U (en) | 2013-09-24 | 2013-09-24 | Direct current loop fuse state monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203455438U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336724A (en) * | 2018-04-24 | 2018-07-27 | 广东电网有限责任公司 | A kind of DC fuse circuit |
| CN110690684A (en) * | 2018-07-06 | 2020-01-14 | 艾默生电气(珠海)有限公司 | Thermal fuse assembly and apparatus |
-
2013
- 2013-09-24 CN CN201320591171.7U patent/CN203455438U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336724A (en) * | 2018-04-24 | 2018-07-27 | 广东电网有限责任公司 | A kind of DC fuse circuit |
| CN110690684A (en) * | 2018-07-06 | 2020-01-14 | 艾默生电气(珠海)有限公司 | Thermal fuse assembly and apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140226 |