CN202662535U - Circuit breaker with automatic time delay power-off protection - Google Patents
Circuit breaker with automatic time delay power-off protection Download PDFInfo
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- CN202662535U CN202662535U CN 201220227474 CN201220227474U CN202662535U CN 202662535 U CN202662535 U CN 202662535U CN 201220227474 CN201220227474 CN 201220227474 CN 201220227474 U CN201220227474 U CN 201220227474U CN 202662535 U CN202662535 U CN 202662535U
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- circuit breaker
- time
- time relay
- control loop
- protection
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Abstract
The utility model discloses a circuit breaker with automatic time delay power-off protection, which can ensure that a master control circuit in the circuit breaker can be powered off within delay time so as to protect an action coil in the circuit breaker from being burnt out. The circuit breaker comprises a circuit breaker mechanism for executing opening and closing actions, a master control loop for controlling the circuit breaker mechanism to work, a power supply-end positive electrode and a power supply-end negative electrode, wherein the master control loop comprises a manual control switch, an auxiliary switch and an action coil which are sequentially connected between the power supply-end positive electrode and the power supply-end negative electrode; the circuit breaker further comprises a time relay for providing time delay power-off protection for the master control loop; the time relay is connected with the action coil in parallel; a normally closed contact of the time relay is connected in the master control loop in series; and when the auxiliary switch can not be disconnected automatically, the time relay can disconnect the power supply of the master control loop through the normally closed contact via the delay time.
Description
Technical field
The utility model relates to a kind of circuit breaker, specifically a kind of circuit breaker with the automatically time-delay power-off protection.
Background technology
Circuit breaker is can close to close, carry and cut-off electric current under the normal loop condition, and can close close, in the in setting time carrying with cut-off the switching device of the electric current under the unusual loop condition (comprising short circuit condition).As shown in Figure 1, existing circuit breaker mainly comprises for the breaker mechanism 5 of carrying out the divide-shut brake action, the main control loop that is used for 5 work of control breaker mechanism, feeder ear anodal 1 and feeder ear negative pole 2, main control loop comprises the hand control switch 4 that is connected in turn between feeder ear anodal 1 and the feeder ear negative pole 2, auxiliary switch 7 and actuation coil 9, breaker mechanism 5 comprises connecting lever 6 and circuit breaker release 8, connecting lever 6 links to each other with auxiliary switch 7 mechanical types, be that connecting lever 6 rotations will drive auxiliary switch 7 rotations, circuit breaker release 8 is connected with actuation coil 9 magnetic, and can realize the distant distance of circuit breaker is controlled by microcomputer remote control switch 3 is set, microcomputer remote control switch 3 be in parallel with hand control switch 4.Wherein, actuation coil 9 be for circuit breaker minute, feed motion, the magnetic field pull-core that relies on minute, produces during 9 energising of feed motion coil makes the release 8 of iron core bump breaker mechanism 5, circuit breaker produces minute, feed motion thereby make.Actuation coil 9 can only be in the utmost point charged work in the short time.
To above-mentioned existing circuit breaker divide, during closing operation, operating personnel pull hand control switch 4, or connect microcomputer remote control switch 3 by the microcomputer remote control, make the control loop plugged, minute, feed motion coil 9 energising, circuit breaker produces minute, feed motion.After the circuit breaker action, connecting levers 6 displacements in the breaker mechanism 5 drive the auxiliary switch 7 that is connected in the control loop and rotate, thereby disconnect the control loop power supply, and this moment, actuation coil 9 dead electricity were finished separating brake or closing operation.
Yet, breaker mechanism 5 in use for some time, in-house connecting lever 6 distances will off normal or the contact off normal of auxiliary switch 7, the capital makes the control loop can not deenergization, actuation coil 9 also will be long charged, until coil blows, circuit breaker can not normally divide, close a floodgate after coil blows, and makes circuit breaker can not continue to use.
The utility model content
The purpose of this utility model provides a kind of circuit breaker with the automatically time-delay power-off protection, can guarantee that the governor circuit in the circuit breaker cuts off the power supply in delay time, and the actuation coil in the protective circuit breaker is not blown.
The purpose of this utility model is achieved through the following technical measures:
A kind of circuit breaker with the automatically time-delay power-off protection; comprise for the breaker mechanism of carrying out the divide-shut brake action; the main control loop that is used for the work of control breaker mechanism; feeder ear positive pole and feeder ear negative pole; described main control loop comprises the hand control switch that is connected in turn between feeder ear positive pole and the feeder ear negative pole; auxiliary switch and actuation coil; described circuit breaker also comprises the time relay that is used to described main control loop that the delay cut-off protection is provided; the described time relay and actuation coil are in parallel; the normally-closed contact of the described time relay is serially connected in the main control loop; when described auxiliary switch can't automatic disconnection, the described time relay disconnected the power supply of main control loop by normally-closed contact through delay time.
Thus, in the time of can not normally disconnecting the control power supply when connecting lever or auxiliary switch fault, the circuit breaker actuation coil is charged, be connected in parallel on the actuation coil the time relay simultaneously electric, the time relay moves behind short time delay, so that the normally-closed contact that is connected on the main control loop disconnects, has also just disconnected the breaker control power supply, make the breaker coil dead electricity, guaranteed that breaker coil can not switch on for a long time and be burned.
As a kind of execution mode of utility model, described circuit breaker also comprises the microcomputer remote control switch, and described microcomputer remote control switch and hand control switch are in parallel.
Do not affect the normal operation of actuation coil for the time relay that makes increase, the internal resistance of the described time relay is far longer than the internal resistance of actuation coil.The circuit breaker of this programme can be provided with the microcomputer remote control switch equally, and described microcomputer remote control switch and hand control switch are in parallel.
As a kind of execution mode of utility model, the normally-closed contact of the described time relay is serially connected between hand control switch and the auxiliary switch.
As a kind of execution mode of utility model, the normally-closed contact of the described time relay is serially connected between auxiliary switch and the actuation coil.
As a kind of execution mode of utility model, the normally-closed contact of the described time relay is serially connected between feeder ear positive pole and the main control loop.
As a kind of execution mode of utility model, the normally-closed contact of the described time relay is serially connected between feeder ear negative pole and the main control loop.
Compared with prior art, circuit breaker of the present utility model has following beneficial effect:
(1) normally-closed contact of the series connection time relay in main control loop, normally-closed contact can be connected working power to actuation coil, does not affect the electric control loop normal operation; In the time of can not normally disconnecting the control power supply when connecting lever or auxiliary switch fault, disconnect normally-closed contact by time relay time-delay, power supply is disconnected, the actuation coil dead electricity can be avoided the long-time energising of coil and burns out;
(2) time relay power supply is connected in parallel on the actuation coil of circuit breaker; when actuation coil was charged, the time relay was charged, can protect actuation coil; because the time relay internal resistance of selecting much larger than the actuation coil internal resistance of circuit breaker, therefore can not affect actuation coil work.
Description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments:
Fig. 1 is the circuit theory schematic diagram of conventional circuit breaker in the prior art;
Fig. 2 is circuit theory diagrams of the present utility model;
Among the figure, 1, feeder ear is anodal, 2, the feeder ear negative pole, 3, the microcomputer remote control switch, 4, hand control switch, 5, breaker mechanism, 6, connecting lever, 7, auxiliary switch, 8, circuit breaker release, 9, actuation coil, 10, the time relay, the normally-closed contact of 10a, the time relay.
Embodiment
As shown in Figure 2; circuit breaker and the circuit breaker shown in Figure 1 of the protection of the utility model band automatically time-delay power-off are basic identical; mainly comprise for the breaker mechanism 5 of carrying out the divide-shut brake action; the main control loop that is used for 5 work of control breaker mechanism; feeder ear anodal 1 and feeder ear negative pole 2; main control loop comprises the hand control switch 4 that is connected in turn between feeder ear anodal 1 and the feeder ear negative pole 2; auxiliary switch 7 and actuation coil 9; its improvement is: the circuit breaker of the utility model band automatically time-delay power-off protection also comprises the time relay 10 that is used to main control loop that the delay cut-off protection is provided; the time relay 10 is in parallel with actuation coil 9; the normally-closed contact 10a of the time relay 10 is serially connected in the main control loop; when auxiliary switch 7 can't automatic disconnection, the time relay 10 disconnected the power supply of main control loop by normally-closed contact 10a through delay times.
Do not affect the normal operation of actuation coil 9 for the time relay 10 that makes increase, the internal resistance of the above-mentioned time relay 10 is far longer than the internal resistance of actuation coil 9.
Wherein, the normally-closed contact 10a of the above-mentioned time relay 10 can be serially connected between hand control switch 4 and the auxiliary switch 7, or be serially connected between auxiliary switch 7 and the actuation coil 9, or be serially connected between feeder ear anodal 1 and the main control loop, or be serially connected between feeder ear negative pole 2 and the main control loop.
Simultaneously, the circuit breaker of the utility model band automatically time-delay power-off protection also can be provided with microcomputer remote control switch 3, and microcomputer remote control switch 3 is in parallel with hand control switch 4.
Operation principle of the present utility model is:
Pull control switch by operating personnel, or remote control connects microcomputer remote control switch 3, make main control loop access power supply and switch on, this moment, actuation coil 9 pull-cores made the circuit breaker release 8 in the iron core bump breaker mechanism 5, made that circuit breaker produces minute, feed motion; After actuation coil 9 action, connecting levers 6 displacements in the breaker mechanism 5 drive auxiliary switch 7 and rotate and open, thereby disconnect the main control loop power supply, and actuation coil 9 dead electricity are finished separating brake or closing operation.
In the time of can not normally disconnecting the control power supply when connecting lever 6 or auxiliary switch 7 faults, the actuation coil 9 of circuit breaker is charged, be connected in parallel on the actuation coil 9 the time relay 10 simultaneously electric, the time relay 10 moves after of short duration time-delay, so that the normally-closed contact 10a that is connected on the main control loop disconnects, also just disconnected power supply, made circuit breaker actuation coil 9 dead electricity, guaranteed that the breaker coil can not switch on for a long time and be burned.
In addition; the setting time scope of this time relay 10 is 0 ~ 2 second; but the delay time of setup times relay 10 was less than 2 seconds; to disconnect the main control loop power supply within a short period of time; guarantee that circuit breaker has enough time to finish separating brake or closing operation under normal circumstances; can guarantee that again circuit breaker can not disconnect control during power supply voluntarily under abnormal condition, disconnected the control power supplys by the time relay 10 in 2 seconds, coil is unlikely is burned in protection.The time relay 10 also can be has many time relays 10 to normally-closed contact 10a, should will be linked into after the parallel connection of contact in the main control loop, to increase contact capacity again.
The normally-closed contact 10a total capacity of this time relay 10 is greater than 100 watts, also the available contactless time relay 10; This time relay 10 is available electromagnetic type relay also, also available electron formula relay.
Execution mode of the present utility model is not limited to this; under the above-mentioned basic fundamental thought of the utility model prerequisite; according to modification, replacement or the change to the utility model other various ways that content is made of the ordinary skill knowledge of this area and customary means, all within the utility model rights protection scope.
Claims (8)
1. circuit breaker with automatically time-delay power-off protection; comprise for the breaker mechanism of carrying out the divide-shut brake action; the main control loop that is used for the work of control breaker mechanism; feeder ear positive pole and feeder ear negative pole; described main control loop comprises the hand control switch that is connected in turn between feeder ear positive pole and the feeder ear negative pole; auxiliary switch and actuation coil; it is characterized in that: described circuit breaker also comprises the time relay that is used to described main control loop that the delay cut-off protection is provided; the described time relay and actuation coil are in parallel; the normally-closed contact of the described time relay is serially connected in the main control loop; when described auxiliary switch can't automatic disconnection, the described time relay disconnected the power supply of main control loop by normally-closed contact through delay time.
2. the circuit breaker with automatically time-delay power-off protection according to claim 1, it is characterized in that: described circuit breaker also comprises the microcomputer remote control switch, described microcomputer remote control switch and hand control switch are in parallel.
3. the circuit breaker with automatically time-delay power-off protection according to claim 1, it is characterized in that: the internal resistance of the described time relay is far longer than the internal resistance of actuation coil.
4. the circuit breaker with automatically time-delay power-off protection according to claim 3, it is characterized in that: described circuit breaker also comprises the microcomputer remote control switch, described microcomputer remote control switch and hand control switch are in parallel.
5. according to claim 1 to 4 each described circuit breakers with the automatically time-delay power-off protection, it is characterized in that: the normally-closed contact of the described time relay is serially connected between hand control switch and the auxiliary switch.
6. according to claim 1 to 4 each described circuit breakers with the automatically time-delay power-off protection, it is characterized in that: the normally-closed contact of the described time relay is serially connected between auxiliary switch and the actuation coil.
7. according to claim 1 to 4 each described circuit breakers with the automatically time-delay power-off protection, it is characterized in that: the normally-closed contact of the described time relay is serially connected between feeder ear positive pole and the main control loop.
8. according to claim 1 to 4 each described circuit breakers with the automatically time-delay power-off protection, it is characterized in that: the normally-closed contact of the described time relay is serially connected between feeder ear negative pole and the main control loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220227474 CN202662535U (en) | 2012-05-18 | 2012-05-18 | Circuit breaker with automatic time delay power-off protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220227474 CN202662535U (en) | 2012-05-18 | 2012-05-18 | Circuit breaker with automatic time delay power-off protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202662535U true CN202662535U (en) | 2013-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220227474 Expired - Lifetime CN202662535U (en) | 2012-05-18 | 2012-05-18 | Circuit breaker with automatic time delay power-off protection |
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| Country | Link |
|---|---|
| CN (1) | CN202662535U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956998A (en) * | 2014-04-25 | 2014-07-30 | 国家电网公司 | Energy-saving lightning protection device of agricultural irrigation line |
-
2012
- 2012-05-18 CN CN 201220227474 patent/CN202662535U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956998A (en) * | 2014-04-25 | 2014-07-30 | 国家电网公司 | Energy-saving lightning protection device of agricultural irrigation line |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130109 |
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| CX01 | Expiry of patent term |