CN205720457U - A kind of stable intelligent relay-protection tester of powering - Google Patents
A kind of stable intelligent relay-protection tester of powering Download PDFInfo
- Publication number
- CN205720457U CN205720457U CN201620217077.9U CN201620217077U CN205720457U CN 205720457 U CN205720457 U CN 205720457U CN 201620217077 U CN201620217077 U CN 201620217077U CN 205720457 U CN205720457 U CN 205720457U
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- circuit
- outfan
- lightning protection
- power supply
- protection circuit
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Abstract
The utility model discloses a kind of stable intelligent relay-protection tester of powering, it includes power supply unit and electrical equipment；Described power supply unit includes lightning protection circuit, mu balanced circuit and ac-dc converter circuit；The input of lightning protection circuit is connected with outside power supply, and the outfan of lightning protection circuit is connected with mu balanced circuit, and the outfan of mu balanced circuit is connected with ac-dc converter circuit；Ac-dc converter circuit is connected with electrical equipment.This utility model provides the intelligent relay-protection tester that a kind of electricity is stable; power supply unit includes lightning protection circuit, mu balanced circuit and ac-dc converter circuit; it is that electrical equipment is powered by carrying out AC-DC conversion after lightning protection circuit and mu balanced circuit again; power supply is stable, and the normal work for tester provides guarantee.
Description
Technical field
This utility model relates to a kind of stable intelligent relay-protection tester of powering.
Background technology
Owing to the information feedback amount of tradition transformer station is little; fault message is difficult to Macro or mass analysis; wiring complexity is loaded down with trivial details; and have the problems such as security risk for on-the-spot test operations staff; and in these years the developing rapidly of information, communication and network technology; people have begun to attempt researching and developing corresponding product and match, the therefore generation of intelligence relay-protection tester.
In intelligence relay-protection tester, power supply unit be in fact must an obligato part, if power supply instability, it will the normal work to tester has a huge impact.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art; the intelligent relay-protection tester that a kind of electricity is stable is provided; power supply unit includes lightning protection circuit, mu balanced circuit and ac-dc converter circuit; it is that electrical equipment is powered by carrying out AC-DC conversion after lightning protection circuit and mu balanced circuit again; power supply is stable, and the normal work for tester provides guarantee.
The purpose of this utility model is achieved through the following technical solutions: a kind of stable intelligent relay-protection tester of powering, it includes power supply unit and electrical equipment；Described power supply unit includes lightning protection circuit, mu balanced circuit and ac-dc converter circuit；The input of lightning protection circuit is connected with outside power supply, and the outfan of lightning protection circuit is connected with mu balanced circuit, and the outfan of mu balanced circuit is connected with ac-dc converter circuit；Ac-dc converter circuit is connected with electrical equipment.
Described lightning protection circuit includes common mode inductance L1, electric capacity Cx1, electric capacity Cx2；The first input end A1 and the second input A2 of common mode inductance L1 is connected with external power source as the input of lightning protection circuit, and the first outfan B1 and the second outfan B2 of common mode inductance L1 is connected with mu balanced circuit as the outfan of lightning protection circuit；Electric capacity Cx1 is connected in parallel between the first input end A1 of common mode inductance L1 and the second input A2；Electric capacity Cx2 is connected in parallel between the first outfan B1 of common mode inductance L1 and the second outfan B2；
Described mu balanced circuit includes that voltage input end, voltage output end and multiple Zener diode, described voltage input end connect lightning protection circuit, and described voltage output end is connected with ac-dc converter circuit；Described multiple Zener diodes are connected in parallel between voltage input end and voltage output end；Described Zener diode is transient voltage suppressor diode.
Described AC/DC change-over circuit uses AC/DC power blood pressure lowering chip SX3701.
Described electrical equipment includes mainboard, ST plate, communication board, On-off signal plate, switching value and small-signal output board；The outfan of power supply circuits is connected with mainboard, ST plate, communication board, On-off signal plate, switching value and small-signal output board respectively.
The beneficial effects of the utility model are: (1) power supply unit includes lightning protection circuit, mu balanced circuit and ac-dc converter circuit, it is that electrical equipment is powered by carrying out AC-DC conversion after lightning protection circuit and mu balanced circuit again, power supply is stable, and the normal work for tester provides guarantee.
(2) there is lightning protection circuit, in the case of thunder and lightning occurs, by the thunder and lightning Absorption of lightning protection circuit, prevent the impact that intelligence relay-protection tester is brought by thunder and lightning.
(3) there is mu balanced circuit, in the case of thunder and lightning occurs, it is possible to transient voltage is suppressed, plays Stabilization.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model；
Fig. 2 is the schematic diagram of lightning protection circuit；
Fig. 3 is the schematic diagram of mu balanced circuit.
Detailed description of the invention
The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings, but protection domain of the present utility model is not limited to the following stated.
As it is shown in figure 1, a kind of stable intelligent relay-protection tester of powering, it includes power supply unit and electrical equipment；Described power supply unit includes lightning protection circuit, mu balanced circuit and ac-dc converter circuit；The input of lightning protection circuit is connected with outside power supply, and the outfan of lightning protection circuit is connected with mu balanced circuit, and the outfan of mu balanced circuit is connected with ac-dc converter circuit；Ac-dc converter circuit is connected with electrical equipment.
As in figure 2 it is shown, described lightning protection circuit includes common mode inductance L1, electric capacity Cx1, electric capacity Cx2；The first input end A1 and the second input A2 of common mode inductance L1 is connected with external power source as the input of lightning protection circuit, and the first outfan B1 and the second outfan B2 of common mode inductance L1 is connected with mu balanced circuit as the outfan of lightning protection circuit；Electric capacity Cx1 is connected in parallel between the first input end A1 of common mode inductance L1 and the second input A2；Electric capacity Cx2 is connected in parallel between the first outfan B1 of common mode inductance L1 and the second outfan B2；
Further, described external power source is the alternating current power supply of 220V.
As it is shown on figure 3, described mu balanced circuit includes that voltage input end, voltage output end and multiple Zener diode, described voltage input end connect lightning protection circuit, described voltage output end is connected with ac-dc converter circuit；Described multiple Zener diodes are connected in parallel between voltage input end and voltage output end；Described Zener diode is transient voltage suppressor diode.
Described AC/DC change-over circuit uses AC/DC power blood pressure lowering chip SX3701.
Further, described AC/DC power blood pressure lowering chip SX3701 has two, two chips are all connected with transient voltage suppression circuit, and one of them for being converted to the DC source of 5V by alternating current power supply, and one for being converted to the DC source of 12V by alternating current power supply.
Further, electrical equipment its be to be exactly that each electricity consumption board within tester is surveyed in intelligence relay protection, described electrical equipment includes mainboard, ST plate, communication board, On-off signal plate, switching value and small-signal output board；The outfan of power supply circuits is connected with mainboard, ST plate, communication board, On-off signal plate, switching value and small-signal output board respectively.
Further, the DC source of 5V is for being powered for mainboard, and the DC source of 12V is for being powered ST plate, communication board, On-off signal plate, switching value and small-signal output board.
If it occur that thunder and lightning: when lightning current flows through lightning protection circuit with surge pulse, owing to electric capacity Cx1, electric capacity Cx2 and common mode inductance L1 are energy-storage travelling wave tube, thus the effect absorbing part lightning current surge energy can be played；Again through the filtering of mu balanced circuit, it is possible to ensure the steady operation of system.Transient voltage can be suppressed and filter by mu balanced circuit, prevents the impact that tester is brought by thunder and lightning high pressure.
Claims (3)
1. the intelligent relay-protection tester that a power supply is stable, it is characterised in that: it includes power supply unit and electrical equipment；Described power supply unit includes lightning protection circuit, mu balanced circuit and ac-dc converter circuit；The input of lightning protection circuit is connected with outside power supply, and the outfan of lightning protection circuit is connected with mu balanced circuit, and the outfan of mu balanced circuit is connected with ac-dc converter circuit；Ac-dc converter circuit is connected with electrical equipment；
Described lightning protection circuit includes common mode inductance L1, electric capacity Cx1, electric capacity Cx2；The first input end A1 and the second input A2 of common mode inductance L1 is connected with external power source as the input of lightning protection circuit, and the first outfan B1 and the second outfan B2 of common mode inductance L1 is connected with mu balanced circuit as the outfan of lightning protection circuit；Electric capacity Cx1 is connected in parallel between the first input end A1 of common mode inductance L1 and the second input A2；Electric capacity Cx2 is connected in parallel between the first outfan B1 of common mode inductance L1 and the second outfan B2；
Described mu balanced circuit includes that voltage input end, voltage output end and multiple Zener diode, described voltage input end connect lightning protection circuit, and described voltage output end is connected with ac-dc converter circuit；Described multiple Zener diodes are connected in parallel between voltage input end and voltage output end；Described Zener diode is transient voltage suppressor diode.
A kind of stable intelligent relay-protection tester of powering the most according to claim 1, it is characterised in that: described ac-dc converter circuit uses AC/DC power blood pressure lowering chip SX3701.
A kind of stable intelligent relay-protection tester of powering the most according to claim 1, it is characterised in that: described electrical equipment includes mainboard, ST plate, communication board, On-off signal plate, switching value and small-signal output board；The outfan of power supply circuits is connected with mainboard, ST plate, communication board, On-off signal plate, switching value and small-signal output board respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620217077.9U CN205720457U (en) | 2016-03-21 | 2016-03-21 | A kind of stable intelligent relay-protection tester of powering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620217077.9U CN205720457U (en) | 2016-03-21 | 2016-03-21 | A kind of stable intelligent relay-protection tester of powering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205720457U true CN205720457U (en) | 2016-11-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620217077.9U Expired - Fee Related CN205720457U (en) | 2016-03-21 | 2016-03-21 | A kind of stable intelligent relay-protection tester of powering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205720457U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652131A (en) * | 2016-03-21 | 2016-06-08 | 成都天进仪器有限公司 | Intelligent relay protection testing device with stable power supply function |
-
2016
- 2016-03-21 CN CN201620217077.9U patent/CN205720457U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105652131A (en) * | 2016-03-21 | 2016-06-08 | 成都天进仪器有限公司 | Intelligent relay protection testing device with stable power supply function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20170321 |