CN202421276U - Relay-protection direct-current voltage sensing circuit - Google Patents
Relay-protection direct-current voltage sensing circuit Download PDFInfo
- Publication number
- CN202421276U CN202421276U CN2011205131627U CN201120513162U CN202421276U CN 202421276 U CN202421276 U CN 202421276U CN 2011205131627 U CN2011205131627 U CN 2011205131627U CN 201120513162 U CN201120513162 U CN 201120513162U CN 202421276 U CN202421276 U CN 202421276U
- Authority
- CN
- China
- Prior art keywords
- capacitor
- current sensor
- relay
- sensing circuit
- voltage sensing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model relates to a relay-protection direct-current voltage sensing circuit, aiming to effectively solve the problems of the troublesome detection and the low detection efficiency of the active contact point of the existing secondary circuit. According to the technical scheme, the relay-protection direct-current voltage sensing circuit comprises a current sensor 1; the HT+ end of the current sensor 1 is connected in series with a resistor R1; the current sensor 1 is connected with a 12V power supply; the 12V power supply is connected with a capacitor C1 and a capacitor C2 which are connected in series; the capacitor C1 and the capacitor C2 are connected with the GND end of the current sensor 1; a resistor R2 is connected between the Vg end of the current sensor 1 and the capacitor C2; the resistor R1 and the resistor R2 are grounded; and two ends of the resistor R2 are connected with an output port V1 and an output port V2. The relay-protection direct-current voltage sensing circuit has a unique structure and a good detection effect, is convenient to use and is an innovation to the detection of the contact point of the secondary loop.
Description
One, technical field
The utility model relates to circuit, particularly a kind of relay protection DC voltage sensing circuit that is used for the inspection of relay protection of power system secondary circuit.
Two, background technology
To in the electric system during operational outfit on-line monitoring, need prevent to produce parasitic loop between the secondary circuit of difference in functionality, influence system's operation; Offer some clarification on second protection equipment in the relay protection second protection safety rule and forbid that the charged of any equipment seals in; So for active contact, the detection of switching value must accomplish that protection equipment is had no influence, therefore; The routine measurement sensor can not directly apply to the inspection of relay protection of power system secondary circuit; The routine measurement mode is kept watch on the current potential situation for using digimer, and synchronization can only be measured a terminal current potential, and can't the track record situation of change.
Three, summary of the invention
To above-mentioned situation, for overcoming the defective of prior art, the purpose of the utility model just provides a kind of relay protection DC voltage sensing circuit, can effectively solve the inspection trouble and the low problem of checking efficiency of active contact in the existing secondary circuit.
The technical scheme of its solution is to comprise current sensor, the HT+ end series connection resistance R 1 of current sensor; Current sensor links to each other with the 12V power supply; Be connected to the capacitor C 1 and capacitor C 2 of series connection on the 12V power supply, capacitor C 1 links to each other with the GND end of current sensor with capacitor C 2, is connected to resistance R 2 between the Vg end of current sensor 1 and the capacitor C 2; Resistance R 2 and capacitor C 2 ground connection, the two ends of resistance R 2 are connected to output port V1, V2 respectively.
The utility model structure is unique, easy to use, check effectively, is the secondary circuit innovation on checking of getting an electric shock.
Four, description of drawings
Fig. 1 is the connection layout of the user mode of the utility model.
Five, embodiment
Explain further details below in conjunction with the embodiment of accompanying drawing to the utility model.
Provided by Fig. 1, the utility model comprises current sensor, the HT+ end series connection resistance R 1 of current sensor 1; Current sensor 1 links to each other with the 12V power supply; Be connected to the capacitor C 1 and capacitor C 2 of series connection on the 12V power supply, capacitor C 1 links to each other with the GND end of current sensor 1 with capacitor C 2, is connected to resistance R 2 between the Vg end of current sensor 1 and the capacitor C 2; Resistance R 2 and capacitor C 2 ground connection, the two ends of resistance R 2 are connected to output port V1, V2 respectively.
The working condition of the utility model is; With the positive pole of 0-300V DC voltage to be measured and the HT+ end (anode) that is input to current sensor 1 current terminal after resistance R 1 is connected; The effect of capacitor C 1 and C2 is that result's output of working power voltage and current sensor 1 is isolated, and resistance R 2 is with the Vg pin output of noble potential from current sensor 1, and the input voltage range of current sensor 1 is 0-300V; The voltage range of output is 0-5V; On withstand voltage, can well satisfy the DC bus-bar voltage Testing requirement, and link to each other with data collector through output port V1, the V2 at resistance R 2 two ends, the utility model is done improvement to the peripheral circuit of current sensor; The signal of input is connected with the resistance of a high value; Be input to the input end of current sensor 1, convert voltage signal into current signal that sensor can directly be changed through resistance
The utility model is simple in structure, unique, and is safe in utilization, convenient, is the innovation on secondary circuit detects.
Claims (1)
1. a relay protection DC voltage sensing circuit comprises current sensor, it is characterized in that; The HT+ end series connection resistance R 1 of current sensor (1), current sensor (1) links to each other with the 12V power supply, is connected to the capacitor C 1 and capacitor C 2 of series connection on the 12V power supply; Capacitor C 1 links to each other with the GND end of current sensor (1) with capacitor C 2; Be connected to resistance R 2 between the Vg end of current sensor (1) and the capacitor C 2, resistance R 2 and capacitor C 2 ground connection, the two ends of resistance R 2 are connected to output port V1, V2 respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205131627U CN202421276U (en) | 2011-12-12 | 2011-12-12 | Relay-protection direct-current voltage sensing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205131627U CN202421276U (en) | 2011-12-12 | 2011-12-12 | Relay-protection direct-current voltage sensing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202421276U true CN202421276U (en) | 2012-09-05 |
Family
ID=46746029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205131627U Expired - Fee Related CN202421276U (en) | 2011-12-12 | 2011-12-12 | Relay-protection direct-current voltage sensing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202421276U (en) |
-
2011
- 2011-12-12 CN CN2011205131627U patent/CN202421276U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102749562B (en) | Insulation monitoring device and monitoring method of power cell of electric vehicle | |
| CN103178595A (en) | Mobile phone adapter | |
| KR20150052139A (en) | Device for detecting and measuring an insulation fault | |
| CN106053946B (en) | Photovoltaic DC insulated monitoring method, device and a kind of photovoltaic system | |
| CN102818992B (en) | Relay detection device | |
| CN104749484A (en) | Electric-leakage monitoring device | |
| CN202206118U (en) | Current mutual induction secondary over-voltage protection device | |
| CN103308755A (en) | Insulation testing device and method for high-voltage direct-current remote power supply system | |
| CN202421276U (en) | Relay-protection direct-current voltage sensing circuit | |
| CN102185360A (en) | High-voltage charged display locking device | |
| CN103743942A (en) | Detection method for initiating explosive device leakage current of power distribution module with solid relay | |
| CN102539871B (en) | Replay protection switching value isolation sensing circuit | |
| CN102445589A (en) | Relay protection direct voltage sensing circuit | |
| CN204631180U (en) | A kind of parallel thyristors leak current detection device and system | |
| CN105629138A (en) | Multifunctional suspension type porcelain insulator on-line detector | |
| CN202840472U (en) | Electric leakage protection device | |
| CN203759124U (en) | Portable rail seam resistance tester | |
| CN202421274U (en) | On-off isolating relay protection sensing circuit | |
| CN202957660U (en) | Passive wireless transmission system | |
| CN202008515U (en) | Passive earth detector for locomotives | |
| CN103245872B (en) | AC fuse condition checkout gear | |
| CN105954587B (en) | A kind of harmonics detection circuit and its detection method of distribution system | |
| CN202948046U (en) | Weak current detecting circuit for power supply | |
| CN102969788A (en) | Passive wireless transmission system | |
| CN103376359A (en) | High-voltage direct current insulation monitoring device suitable for new energy automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20121212 |