CN86206324U - Fully automatic current-limiting relay - Google Patents
Fully automatic current-limiting relay Download PDFInfo
- Publication number
- CN86206324U CN86206324U CN 86206324 CN86206324U CN86206324U CN 86206324 U CN86206324 U CN 86206324U CN 86206324 CN86206324 CN 86206324 CN 86206324 U CN86206324 U CN 86206324U CN 86206324 U CN86206324 U CN 86206324U
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- current
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- iron core
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Abstract
Disclosed is a fully automatic current-limiting relay suitable for controlling and eliminating the illegal electricity use and the automatic safety device of various circuits. A magnetic circuit combination type is adopted to coil the current coil with a small number of turns, a voltage coil with a big number of turns, a short circuit coil and a resistor on the same iron core to control the same actuating mechanism and also the alternation work is conducted with the load variation of an external circuit. When the load exceeds the current limiting value, the power supply is automatically stopped and the power supply is automatically recovered after disassembling the load. Compared with other current limiting devices in the same field, the utility model has the advantages of less power consumption, low cost and simple structure.
Description
The utility model is a kind of full automatic current-limiting relay of touching upon
The power supply shortage in the most of areas of China, in order to protect electrical network and to satisfy key unit's electricity consumption, improper electricity consumption will be controlled and stop to electric administrative department.The electric equipment products with current-limiting function that the power that social at present upward typical prior art is existing minority plant produced differs will make these products work preferably, and transformer, rectifier, filter and other electronic devices and components must be arranged.
The purpose of this invention is to provide a kind of and existing current limliting electrical equipment simple in structure, the low-cost full-automatic current limiting electrical equipment of comparing, is a kind of novel relay on its structure.
The full-automatic current limiting relay that the utility model provides, it is characterized in that this device has number of turn current coil seldom, the potential winding that the number of turn is more, this two coil is controlled same elasticity actuator, current coil links to each other with normally-closed contact, and potential winding one end connects normally opened contact, and the other end connects a resistance device, this two-way is connected in parallel and inserts in the external load circuit, and carries out alternation with the variation of outer load value.
Performance of the present utility model is elaborated by accompanying drawing.
Fig. 1 is an electrical schematic diagram of the present utility model.
Fig. 2 is relay construction figure of the present utility model.
When the current value that flows through load 8 is lower than the cut-off current of this full-automatic current limiting relay, the magnetic potential that current coil 4 produces can not adhesive actuator 3, normally-closed contact 2 invariant positions, potential winding 5 no currents pass through, the warning circuit 7 that the overrelaxation oscillator is formed is not worked when the current value that flows through load 8 surpasses the cut-off current of this full-automatic current limiting relay by short circuit, the magnetic potential that current coil 4 produces is with adhesive actuator 3, normally-closed contact 2 is cut off, connect normally opened contact 1 simultaneously, potential winding 5 enters light current by outside forceful electric power load circuit and keeps operating state, 7 work of overrelaxation this moment warning circuit.When folding removes or the part folding removes the overload load, potential winding 5 will lose the magnetic potential that keeps required, and actuator will return to original state under flexible effect.
When considering some load current near the electrical work of cut-off current, the magnetic potential that starting current produces when connecting moment may adhesive actuator 3, misoperation takes place, for this reason, on same iron core, add around a short-circuited coil 6 that the number of turn is extremely limited, play certain delay effect.
For anti-short circuit capability and the security reliability that increases this relay, this full-automatic current limiting relay directly and live wire be cascaded, and do not join with zero line.
With the high-power electric appliance electricity consumption of restriction except that electric consumption on lighting, as electric furnace etc.Further specify with an embodiment, at cut-off current is under the condition of 1A, current coil adopts the enamelled wire of 0.8mm diameter around 40 circles, the D.C. resistance of this coil is 0.05 Ω, potential winding adopts the enamelled wire of φ 0.06mm, and around 10000 circles, the D.C. resistance of this coil is 1500 Ω, the resistance that is in series with potential winding is 33K Ω, and short-circuited coil adopts 0.35 * 1mm
2Flat copper, around 1 circle, the sectional area of iron core is 15mm
2, the capacity of contact is 2A, and the form of above device by accompanying drawing assembled up, and just can reach the purpose of full-automatic current limiting fully.
The resistance of this full-automatic current limiting device current coil is minimum, and electrical equipment is hardly power consumption in the normal power supply situation, and the maximum pressure drop of actual measurement is 0.2V.
Claims (1)
1, a kind of full-automatic current limiting relay is characterized in that adopting magnetic circuit set mode, with a current coil, potential winding and resistance device on same iron core; These two kinds of coils are controlled same elasticity actuator, current coil links to each other with normally-closed contact, and potential winding one end connects normally opened contact, and the other end connects a resistance device, this two-way is connected in parallel and inserts in the external load circuit, and carries out alternation with the variation of outer load; Also be wound with a short-circuited coil on the iron core with delay effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86206324 CN86206324U (en) | 1986-09-05 | 1986-09-05 | Fully automatic current-limiting relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86206324 CN86206324U (en) | 1986-09-05 | 1986-09-05 | Fully automatic current-limiting relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86206324U true CN86206324U (en) | 1987-09-30 |
Family
ID=4808988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86206324 Withdrawn CN86206324U (en) | 1986-09-05 | 1986-09-05 | Fully automatic current-limiting relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86206324U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108319186A (en) * | 2017-12-28 | 2018-07-24 | 厦门亿联网络技术股份有限公司 | A kind of overcurrent protective device and method of USB device |
-
1986
- 1986-09-05 CN CN 86206324 patent/CN86206324U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108319186A (en) * | 2017-12-28 | 2018-07-24 | 厦门亿联网络技术股份有限公司 | A kind of overcurrent protective device and method of USB device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |