CN2224479Y - Self-healing protector - Google Patents
Self-healing protector Download PDFInfo
- Publication number
- CN2224479Y CN2224479Y CN 95200760 CN95200760U CN2224479Y CN 2224479 Y CN2224479 Y CN 2224479Y CN 95200760 CN95200760 CN 95200760 CN 95200760 U CN95200760 U CN 95200760U CN 2224479 Y CN2224479 Y CN 2224479Y
- Authority
- CN
- China
- Prior art keywords
- protector
- discharge tube
- warning circuit
- utility
- tube
- 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 an emergency protective circuit device used for protecting a telephone switchboard when outer lines generate strong electric interference. The utility model is composed of a discharge circuit and two alarm circuits. The damage of the telephone switchboard due to strong electric interference transmitted from the outer lines can be avoided, original state can be restored without the need of artificial repair after the interference is eliminated, and the utility model can alarm when the outer lines receive strong electric interference under the condition of inefficient discharge tubes.
Description
The utility model relates to a kind of emergency protective circuit device; especially when harmful variation of normal running conditions occurring departing from, can finish automatic shear; be exclusively used in the emergency protective circuit device of extraordinary electric equipment; be best suited for outside line when unexpectedly forceful electric power occurring, telephone exchange is implemented urgent protection automatically.
Present widely used switch protector constitutes (gas or solid discharging tube) by the discharge tube of one one termination outside line (inlet wire or outlet) other end ground connection, when outside line is disturbed by forceful electric power or is overlapped by the source with power frequency, the discharge tube conducting makes outside line ground connection, with protection switch safety, an end of discharge tube is provided with spring simultaneously, the other end is established a low melting point block tin, discharge tube is external loads onto a contact, generate heat during the pipe conducting, tin is melted, the displacement of spring driving tube, make the closing of contact that is loaded on warning circuit, this protector can play protection switch and two effects of alarm, but also exists some shortcomings, be mainly for the every work of (1) protector and once promptly need change, exhaust the people and drain the treasury; Can not alarm when (2) discharge tube loses efficacy, unsafe to the maintenance personal.
The purpose of this utility model is after disclosing a kind of each work, disturbs and can restore to the original state as long as eliminate in the outside line, does not need artificial maintenance, and the protector that still can alarm when discharge tube inefficacy back outside line is disturbed by forceful electric power again.Its scheme is as follows.
A kind of from the renaturation protector, constitute by discharge tube and warning circuit, the electric contact of often opening of discharge tube State Control is connected in the warning circuit, it is characterized in that: described discharge tube is a solid discharging tube; The management and control electric contact is the sensible heat element; Second warning circuit that between outside line and ground, has a routing resistance and neon tube to constitute.
Because do not damage after the once discharge of discharge tube employing solid, forceful electric power disturbs in the outside line as long as eliminated, discharge tube promptly is cooled, and normally opened contact is multiple again waits for that for out state task need not manual amendment down; When discharge tube lost efficacy the back outside line when disturbed by forceful electric power, because of not conducting of discharge tube, the high potential in the outside line is not pulled to earth potential, must produce electric current in second warning circuit and alarms.Therefore can restore voluntarily after the each work of the utility model, and still can alarm to the staff when the situation outside line that discharge tube lost efficacy has strong jamming, the prompting people have Danger Electric shock risk.
Hereinafter will and contrast accompanying drawing by embodiment further describes.
The drawing explanation: Figure of description is the circuit diagram that is connected the embodiment 1 on the exchange line.
Embodiment 1. referring to accompanying drawing by R
1With neon tube D
1The discharge circuit that second warning circuit that constitutes and solid discharging tube SAA constitute is connected in parallel between outside line and the ground wire, by-48
VThe resistance R of power supply power supply
2, luminous tube D
2, sensible heat element J constitutes a warning circuit, its sensible heat element is the bimetal leaf electric contact, bimetal leaf is close to the wall of discharge tube.Occur in pairs because the outside line of switch is inlet wire and outlet, and all need security personnel equally, two identical protector circuits are fitted together compact.
Embodiment 2, and circuit is identical with embodiment 1, only sensible heat element J are changed to memory metal elements by bimetal leaf.
Claims (4)
1. one kind from the renaturation protector, is made of discharge tube and warning circuit, and the electric contact of often opening of discharge tube State Control is connected in the warning circuit, it is characterized in that: described discharge tube is a solid discharging tube; The management and control electric contact is the sensible heat element; Second warning circuit that between outside line and ground, has a routing resistance and neon tube to constitute.
2. protector according to claim 1 is characterized in that the sensible heat element is a bimetal leaf.
3. protector according to claim 1 is characterized in that, the sensible heat element is a memory metal elements.
4. according to claim 1,2 or 3 described protectors, it is characterized in that two groups of identical protector circuits are fitted together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95200760 CN2224479Y (en) | 1995-01-16 | 1995-01-16 | Self-healing protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95200760 CN2224479Y (en) | 1995-01-16 | 1995-01-16 | Self-healing protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2224479Y true CN2224479Y (en) | 1996-04-10 |
Family
ID=33854413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95200760 Expired - Fee Related CN2224479Y (en) | 1995-01-16 | 1995-01-16 | Self-healing protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2224479Y (en) |
-
1995
- 1995-01-16 CN CN 95200760 patent/CN2224479Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |