CN216530517U - Multiple power protection system of hoist - Google Patents
Multiple power protection system of hoist Download PDFInfo
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- CN216530517U CN216530517U CN202122775863.4U CN202122775863U CN216530517U CN 216530517 U CN216530517 U CN 216530517U CN 202122775863 U CN202122775863 U CN 202122775863U CN 216530517 U CN216530517 U CN 216530517U
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Abstract
The utility model discloses a crane multi-power protection system, which comprises a power distribution system power supply circuit main loop and a circuit breaker connected to the front end of the power distribution system power supply circuit main loop, wherein the power distribution system power supply circuit main loop positioned at the rear side of the circuit breaker also comprises an intelligent ammeter, a mutual inductor and an over-voltage and under-voltage protection relay, and the intelligent ammeter, the mutual inductor and the over-voltage and under-voltage protection relay are respectively connected with the power distribution system power supply circuit main loop; the intelligent power distribution system is characterized in that the mutual inductor is connected with the intelligent ammeter, the circuit breaker is additionally provided with an electric excitation trip, the electric excitation trip is used as a secondary protection executing mechanism of a power distribution system power circuit main loop, and an excitation trip coil for controlling the electric excitation trip is connected between the mutual inductor and the intelligent ammeter. The utility model has the functions of overvoltage protection, undervoltage protection, leakage protection, open circuit protection, grounding protection and the like, and can better protect the power circuit of the power distribution system; thereby avoiding the occurrence of equipment damage and electric shock of operators.
Description
Technical Field
The utility model belongs to the technical field of power protection, and particularly relates to a crane multiple power protection system, which is particularly suitable for power multiple safety protection of a general gantry crane.
Background
At present, a power cable of a crane is generally protected by a breaker in a power distribution system in short circuit, open circuit and grounding; because the circuit breaker has a single protection characteristic, sometimes, because the action threshold value is not reached or the action is lagged, the problems of equipment damage and electric shock of operators occur, personal safety and equipment safety are greatly endangered, and the generated consequences are very serious, so that the circuit breaker is not ideal for protecting the circuit of the power distribution system by singly using the circuit breaker. In summary, there is an urgent need to develop a novel crane power protection system that can solve the above problems.
Disclosure of Invention
Aiming at the problems, the utility model makes up the defects of the prior art and provides a crane multiple power supply protection system.
In order to achieve the purpose, the utility model adopts the following technical scheme.
The utility model discloses a crane multiple power supply protection system, which comprises a power distribution system power supply circuit main loop and a circuit breaker connected to the front end of the power distribution system power supply circuit main loop, and is characterized in that: the main circuit of the power distribution system power circuit positioned at the rear side of the circuit breaker also comprises an intelligent ammeter, a mutual inductor and an over-voltage and under-voltage protection relay, wherein the intelligent ammeter, the mutual inductor and the over-voltage and under-voltage protection relay are respectively connected with the main circuit of the power distribution system power circuit; the intelligent power distribution system is characterized in that the mutual inductor is connected with the intelligent ammeter, the circuit breaker is additionally provided with an electric excitation trip, the electric excitation trip is used as a secondary protection executing mechanism of a power distribution system power circuit main loop, and an excitation trip coil for controlling the electric excitation trip is connected between the mutual inductor and the intelligent ammeter.
As a preferred scheme of the utility model, the intelligent ammeter adopts an intelligent ammeter with the model number of HD3AA73-0 and comprises a power supply end, a current signal input end and a switching value output end, one line of a power supply circuit main loop of the power distribution system is connected with a binding post 1 at the power supply end, a binding post 18 at the switching value output end and a binding post 16 at the switching value output end of the intelligent ammeter, and the other line of the power supply circuit main loop of the power distribution system is connected with a binding post 2 at the power supply end, a binding post 5 at the current signal input end and a binding post 7 at the current signal input end of the intelligent ammeter.
As another preferable scheme of the utility model, the transformers comprise a first transformer and a second transformer, and the first transformer and the second transformer both adopt current-mode transformers with output 5A; one end of a first transformer is connected to one line of a main loop of a power supply circuit of the power distribution system, and the other end of the first transformer is connected with a binding post 4 at the current signal input end of the intelligent ammeter; one end of the second mutual inductor is connected to a line of a main circuit of a power supply circuit of the power distribution system and then connected with one end of the excitation trip coil, the other end of the excitation trip coil is respectively connected with the binding posts 15, 17 and 18 of the switching value output end, and the other end of the second mutual inductor is connected with the binding post 6 of the current signal input end of the intelligent ammeter.
As another preferable scheme of the present invention, a relay switch is arranged between the other end of the excitation trip coil and the terminal 18 of the switching value output end, and the relay switch is controlled to be switched on or off by an output signal of the overvoltage and undervoltage protection relay.
The utility model has the beneficial effects.
The crane multiple power supply protection system provided by the utility model solves the problem that the traditional crane can not achieve an ideal protection effect by singly using a circuit breaker to protect a power supply circuit main loop of a power distribution system, plays the effects of multiple protection and multiple action values by combining the installation and the use of an intelligent ammeter, a mutual inductor and an over-voltage and under-voltage protection relay, has the functions of overvoltage protection, under-voltage protection, leakage protection, open circuit protection, grounding protection and the like, and can better protect the power supply circuit of the power distribution system; thereby avoiding the occurrence of equipment damage and electric shock of operators.
Drawings
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model.
Fig. 1 is a circuit diagram of a crane multiple power protection system of the present invention.
The labels in the figure are: 1 is a breaker; 2 is a first mutual inductor; a second transformer 3; 4 is an over-voltage and under-voltage protection relay; 5 is an excitation trip coil; 6 is a relay switch; 7 is an intelligent ammeter; 8 is a main loop of a power supply circuit of the power distribution system; 9 is a power supply end; 10 is a current signal input end; and 11 is a switching value output end.
Detailed Description
The crane multiple power supply protection system comprises a power distribution system power supply circuit main loop 8, a circuit breaker 1 connected to the front end of the power distribution system power supply circuit main loop 8, an intelligent ammeter 7, a mutual inductor and an overvoltage and undervoltage protection relay 4, wherein the power distribution system power supply circuit main loop 8 positioned on the rear side of the circuit breaker 8 is also internally provided with the intelligent ammeter 7, the mutual inductor and the overvoltage and undervoltage protection relay 4 which are respectively connected with the power distribution system power supply circuit main loop 8; the transformer is connected with the intelligent ammeter 7, the circuit breaker 8 is additionally provided with an electric excitation trip, the electric excitation trip is used as a secondary protection executing mechanism of a power distribution system power circuit main loop 8, and an excitation trip coil 5 for controlling the electric excitation trip is connected between the transformer and the intelligent ammeter.
The intelligent ammeter 7 is an intelligent ammeter with the model of HD3AA73-0 and comprises a power supply end 9, a current signal input end 10 and a switching value output end 11, one circuit of a power distribution system power supply circuit main loop 8 is connected with a binding post 1 of the power supply end 9 of the intelligent ammeter 7, a binding post 18 of the switching value output end 11 and a binding post 16 of the switching value output end 11, and the other circuit of the power distribution system power supply circuit main loop 8 is connected with a binding post 2 of the power supply end 9 of the intelligent ammeter 7, a binding post 5 of the current signal input end 10 and a binding post 7 of the current signal input end 10.
The mutual inductors comprise a first mutual inductor 2 and a second mutual inductor 3, and the first mutual inductor 2 and the second mutual inductor 3 both adopt current type mutual inductors with output 5A; one end of the first transformer 2 is connected to a line of a power circuit main loop 8 of the power distribution system, and the other end of the first transformer 2 is connected with a binding post 4 of a current signal input end 10 of the intelligent ammeter 7; one end of the second mutual inductor 2 is connected to a line of a power supply circuit main loop 8 of the power distribution system and then connected with one end of the excitation trip coil 5, the other end of the excitation trip coil 5 is respectively connected with terminals 15, 17 and 18 of a switching value output end 11, and the other end of the second mutual inductor 3 is connected with a terminal 6 of a current signal input end 10 of the intelligent ammeter 7.
A relay switch 6 is arranged between the other end of the excitation trip coil 5 and a binding post 18 of the switching value output end 11, and the relay switch 6 is controlled to be switched on or not by an output signal of the overvoltage and undervoltage protection relay 4.
The circuit breaker 1 of the utility model carries out monitoring protection on load current, the circuit breaker 1 is additionally provided with an electric excitation trip as a secondary protection actuating mechanism, and the circuit breaker 1 has a residual current action function and is used for leakage protection. The number of the transformers is two, and the current type transformers with 5A output are selected for use and used for collecting current of a line of a power circuit main loop 8 of the power distribution system. And the overvoltage and undervoltage protection relay 4 is used for measuring voltage, setting overvoltage, undervoltage and time delay action time according to field working conditions, and outputting an action signal to the circuit breaker 1 to control the circuit breaker 1 to trip. The intelligent ammeter 7 adopts an HD3AA73-0 type intelligent ammeter and has the functions of current detection and rapid logic judgment of a fed-back current value; the intelligent ammeter 7 of the type also has a current alarm setting function, and sets two phases in a three-phase power supply; the intelligent ammeter 7 of this model still has the filtering function, prevents that the small peak current from causing the malfunction, and intelligent ammeter 7 crosses undervoltage protection relay 4 alarm output, and circuit breaker 1 action tripping operation when the electric current reaches the limiting value and surpasss the filtering time.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the utility model.
Claims (4)
1. The utility model provides a multiple power protection system of hoist, includes distribution system power supply circuit major loop, connects in the circuit breaker of distribution system power supply circuit major loop front end, its characterized in that: the main circuit of the power distribution system power circuit positioned at the rear side of the circuit breaker also comprises an intelligent ammeter, a mutual inductor and an over-voltage and under-voltage protection relay, wherein the intelligent ammeter, the mutual inductor and the over-voltage and under-voltage protection relay are respectively connected with the main circuit of the power distribution system power circuit; the intelligent power distribution system is characterized in that the mutual inductor is connected with the intelligent ammeter, the circuit breaker is additionally provided with an electric excitation trip, the electric excitation trip is used as a secondary protection executing mechanism of a power distribution system power circuit main loop, and an excitation trip coil for controlling the electric excitation trip is connected between the mutual inductor and the intelligent ammeter.
2. The crane multiple power protection system as claimed in claim 1, wherein: the intelligent ammeter is an intelligent ammeter with the model of HD3AA73-0 and comprises a power supply end, a current signal input end and a switching value output end, one circuit of a power circuit main loop of the power system is connected with a terminal 1 of the power supply end of the intelligent ammeter, a terminal 18 of the switching value output end and a terminal 16 of the switching value output end, and the other circuit of the power circuit main loop of the power system is connected with a terminal 2 of the power supply end of the intelligent ammeter, a terminal 5 of the current signal input end and a terminal 7 of the current signal input end.
3. The crane multiple power protection system as claimed in claim 1, wherein: the mutual inductors comprise a first mutual inductor and a second mutual inductor, and the first mutual inductor and the second mutual inductor both adopt current type mutual inductors with output 5A; one end of a first transformer is connected to one line of a main loop of a power supply circuit of the power distribution system, and the other end of the first transformer is connected with a binding post 4 at the current signal input end of the intelligent ammeter; one end of the second mutual inductor is connected to a line of a main circuit of a power supply circuit of the power distribution system and then connected with one end of the excitation trip coil, the other end of the excitation trip coil is respectively connected with the binding posts 15, 17 and 18 of the switching value output end, and the other end of the second mutual inductor is connected with the binding post 6 of the current signal input end of the intelligent ammeter.
4. The crane multiple power protection system as claimed in claim 3, wherein: and a relay switch is arranged between the other end of the excitation trip coil and a binding post 18 of the switching value output end, and the relay switch is controlled to be switched on or not by an output signal of the overvoltage and undervoltage protection relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122775863.4U CN216530517U (en) | 2021-11-14 | 2021-11-14 | Multiple power protection system of hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122775863.4U CN216530517U (en) | 2021-11-14 | 2021-11-14 | Multiple power protection system of hoist |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216530517U true CN216530517U (en) | 2022-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122775863.4U Active CN216530517U (en) | 2021-11-14 | 2021-11-14 | Multiple power protection system of hoist |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216530517U (en) |
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2021
- 2021-11-14 CN CN202122775863.4U patent/CN216530517U/en active Active
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