CN204315472U - Safe voltage transfer relay - Google Patents
Safe voltage transfer relay Download PDFInfo
- Publication number
- CN204315472U CN204315472U CN201420843488.XU CN201420843488U CN204315472U CN 204315472 U CN204315472 U CN 204315472U CN 201420843488 U CN201420843488 U CN 201420843488U CN 204315472 U CN204315472 U CN 204315472U
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- China
- Prior art keywords
- contact
- normally
- relay
- closed
- voltage transfer
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of safe voltage transfer relay, break down even if aim to provide the double-throw contact of one relay, still can ensure the relay of the person and system safety.It comprises contact switch control device, contact performance measurement device and logic control element.When breaking down in one group of contact, no matter whether coil electricity, and other one group of coil does not all close, the accident thus the system that ensure that can not be short-circuited.Safety selection relay is applicable to the occasion of all needs two groups of electrical source exchanges.
Description
Technical field
The utility model relates to a kind of relay, particularly relates to a kind of safe voltage transfer relay.
Background technology
Existing selection relay or voltage commutation circuit, by research zero voltage switching, be intended to protect double-throw contact, extend the working life of contact.As State Intellectual Property Office of the People's Republic of China in disclosed publication number be CN102340244B, name is called the patent documentation of the multi-phase DC-DC converter utilizing zero voltage switching, and publication number is CN104052409A, name is called the patent documentation etc. of digital zero voltage switching.And when double-throw contact is broken down, do not provide solution.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the utility model provides a kind of safe voltage transfer relay, solves when voltage switching, breaks down in one group of contact, the short circuit problem that another group contact still can close and cause.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
A kind of safe voltage transfer relay, arranges contact switch control device, contact performance measurement device and logic control element in relay; Described contact performance measurement device connects normally opened contact and normally-closed contact respectively; The output signal input logic control unit of described electric shock condition checkout gear; Described logic control element by contact switch control device control often to open with normally-closed contact opening or closed; The logarithm of normally opened contact and the logarithm of normally-closed contact match with the number of phases of switched voltage respectively.
Further, normally-closed contact and normally opened contact adopt silver-colored nickel or tin oxide.
Beneficial effect: the utility model is in the voltage switching of reality, contact performance measurement device detects the state of contact, the signal that logic control element returns according to contact performance measurement device, export corresponding signal to contact switch control device, contact switch control device controls the closed of contact or opening.When voltage switching, time breaking down in one group of contact, another group contact does not also close, and namely the accident such as power supply short circuit, two groups of power sources in series can not occur, thus ensure that the person and system safety.
Accompanying drawing explanation
The normal operating diagram of Fig. 1 safe voltage transfer relay;
Fig. 2 is contact fault schematic diagram;
Fig. 3 is structural representation of the present utility model;
Wherein: KM is coil; AC/DC1 and AC/DC2 is two groups of power supplys; Normally-closed contact A1, A2; Normally opened contact B1, B2.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
A kind of safe voltage transfer relay, arranges contact switch control device, contact performance measurement device and logic control element in relay; Described contact performance measurement device connects normally opened contact and normally-closed contact respectively; The output signal input logic control unit of described electric shock condition checkout gear; Described logic control element by contact switch control device control often to open with normally-closed contact opening or closed; The logarithm of normally opened contact and the logarithm of normally-closed contact match with the number of phases of switched voltage respectively.
Further, normally-closed contact and normally opened contact adopt silver-colored nickel or tin oxide.
Whether the state that contact performance measurement device detects contact is normal; The signal that logic control element returns according to contact performance measurement device, exports corresponding signal to contact switch control device, and whether contact switch control device controls normally closed or normally opened contact and close; When one group of contact stick together, the fault such as stuck time, no matter whether coil electricity to be, and contact switch control device controls another group contact and all do not close.As shown in Figure 1, normally opened contact here and normally-closed contact all depict one group, and often organizing contact in reality should design according to actual conditions, and as two groups of switched voltages are three phase mains, then normally opened contact should design three pairs of contacts, and normally-closed contact designs three pairs of contacts equally.
The housing of relay should select anti-fire proofing, and should carry out withstand voltage, insulation and the test such as electromagnetic compatibility of complete machine.
Execution mode one: the relay under normal operation
In FIG, the road direction power consumption equipment that safe voltage transfer relay controls in two-way power supply is powered, and two groups of power supplys are respectively AC/DC1 and AC/DC2.When the coil is not energized, normally-closed contact A1, A2 are closed, and normally opened contact B1, B2 open, and power supply AC/DC1 powers to power consumption equipment.When the coil is energized, normally-closed contact A1, A2 open, and normally opened contact B1, B2 are closed, and power supply AC/DC2 powers to power consumption equipment.
Execution mode two: relay when breaking down
In fig. 2, in the process that power supply AC/DC1 powers to power consumption equipment, contact performance measurement device detects that normally-closed contact A1 breaks down, now coil electricity, normally-closed contact A2 opens, the signal that logic control element returns according to contact performance measurement device, exports corresponding signal to contact switch control device, and contact switch control device control normally opened contact B1, B2 still do not close.When after coil blackout, normally-closed contact A2 closes, and normally opened contact B1, B2 still can not close.When voltage switching, time breaking down in one group of contact, another group contact does not also close, and namely the accident such as power supply short circuit, two groups of power sources in series can not occur, thus ensure that the person and system safety.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (2)
1. a safe voltage transfer relay, is characterized in that: in relay, arrange contact switch control device, contact performance measurement device and logic control element; Described contact performance measurement device connects normally opened contact and normally-closed contact respectively; The output signal input logic control unit of described electric shock condition checkout gear; Described logic control element by contact switch control device control often to open with normally-closed contact opening or closed; The logarithm of normally opened contact and the logarithm of normally-closed contact match with the number of phases of switched voltage respectively.
2. a kind of safe voltage transfer relay according to claim 1, is characterized in that: normally-closed contact and normally opened contact adopt silver-colored nickel or tin oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420843488.XU CN204315472U (en) | 2014-12-25 | 2014-12-25 | Safe voltage transfer relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420843488.XU CN204315472U (en) | 2014-12-25 | 2014-12-25 | Safe voltage transfer relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204315472U true CN204315472U (en) | 2015-05-06 |
Family
ID=53137774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420843488.XU Expired - Fee Related CN204315472U (en) | 2014-12-25 | 2014-12-25 | Safe voltage transfer relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204315472U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983594A (en) * | 2017-06-02 | 2018-12-11 | 西克股份公司 | The modular safety relay circuit of at least one machine is connected and/or disconnected to safety |
-
2014
- 2014-12-25 CN CN201420843488.XU patent/CN204315472U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983594A (en) * | 2017-06-02 | 2018-12-11 | 西克股份公司 | The modular safety relay circuit of at least one machine is connected and/or disconnected to safety |
| CN108983594B (en) * | 2017-06-02 | 2021-08-06 | 西克股份公司 | Modular safety relay circuit for safely switching on and/or off at least one machine |
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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 |
Granted publication date: 20150506 Termination date: 20191225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |