CN202395431U

CN202395431U - Novel phase-failure protector of point switch

Info

Publication number: CN202395431U
Application number: CN 201120459589
Authority: CN
Inventors: 徐晖; 周永庆
Original assignee: Henan Splendor Science and Technology Co Ltd
Current assignee: Henan Splendor Science and Technology Co Ltd
Priority date: 2011-11-18
Filing date: 2011-11-18
Publication date: 2012-08-22
Anticipated expiration: 2021-11-18

Abstract

The utility model provides a novel phase-failure protector of a point switch. The novel phase-failure protector of the point switch comprises the phase-failure protector of the point switch; the phase-failure protector of the point switch comprises a phase-failure and monitoring circuit, wherein the phase-failure and monitoring circuit comprises a first current transformer, a second current transformer, a third current transformer, a first capacitor, a second capacitor, a bridge type rectifier circuit and a relay; current monitoring coils and protective coils are respectively arranged at the secondary sides of the current transformers; the two ends of the first capacitor are respectively connected with the two input ends of the bridge type rectifier circuit; and the two ends of the second capacitor and the two ends of the coil of the relay are respectively connected with the two output ends of the bridge type rectifier circuit. The novel phase-failure protector of the point switch has the advantages of scientific design, strong practicability, reasonable structure and capability of monitoring the current of the point switch.

Description

Novel goat phase failure protector

Technical field

The utility model relates to a kind of railway signal protection equipment, specifically, has related to a kind of novel goat phase failure protector.

Background technology

The threephase motor of Y-connection is under the constant situation of load, if when wherein a phase phase shortage or electric current are zero, the current value of other two phases will arrive 1.73 times of rated current, be prone to cause motor coil to generate heat, and then burn out motor.At present; Existing goat phase failure protector, perfect inadequately to above-mentioned in-problem solution, only can carry out open phase protection to the goat that breaks down; Can't monitor the electric current in the goat, be unfavorable for that people understand the working condition of goat at any time.If will monitor to the electric current of goat.Then need construct through secondary, distribution is provided with circuit, comes the electric current of goat is monitored, this method construction is complicated, and is unfavorable for regular maintenance.In order to solve the monitoring problem to the threephase motor electric current, people are seeking a kind of desirable technical solution always.

Summary of the invention

The purpose of the utility model is the deficiency to prior art, thereby a kind of design science, practical, rational in infrastructure and can monitor the novel goat phase failure protector of goat electric current that has is provided.

To achieve these goals; The technical scheme that the utility model adopted is: a kind of novel goat phase failure protector; It comprises the goat phase failure protector; Said goat phase failure protector includes the phase failure and observation circuit; Wherein, The said phase failure and observation circuit comprise first current transformer, second current transformer, the 3rd current transformer, first electric capacity, second electric capacity, bridge rectifier and relay, and wherein, the secondary side of said current transformer is respectively arranged with current monitoring coil and protection coil; One end of the protection coil of the said first Current Transformer Secondary side is connected with an end of said first electric capacity; The other end of the protection coil of the said first Current Transformer Secondary side is connected with an end of the protection coil of the said second Current Transformer Secondary side, and the other end of the protection coil of the said second Current Transformer Secondary side is connected with an end of the protection coil of said the 3rd Current Transformer Secondary side, and the other end of the protection coil of said the 3rd Current Transformer Secondary side is connected with the other end of said first electric capacity; The two ends of said first electric capacity are connected with two inputs of said bridge rectifier respectively, and the coil two ends of the two ends of said second electric capacity, said relay connect two outputs of said bridge rectifier respectively.

The relative prior art of the utility model has substantive distinguishing features and progress; Specifically, this novel goat phase failure protector is provided with the phase failure and observation circuit, need not unnecessary construction; Just can realize the open phase protection of goat and the function of operating current monitoring; Compare traditional goat phase failure protector more perfect function, and practice thrift cost, simplified apparatus; It has design science, practical, rational in infrastructure and can monitor the advantage of goat electric current.

Description of drawings

Fig. 1 is the structural representation of the phase failure described in the utility model and observation circuit.

Embodiment

Through embodiment, the technical scheme of the utility model is done further detailed description below.

As shown in Figure 1; A kind of novel goat phase failure protector; It comprises the goat phase failure protector; Said goat phase failure protector includes the phase failure and observation circuit; Wherein, The said phase failure and observation circuit comprise the first current transformer T1, the second current transformer T2, the 3rd current transformer T3, first capacitor C 1, second capacitor C 2; Bridge rectifier D1 and relay; The secondary side of the said first current transformer T1, the said second current transformer T2 and said the 3rd current transformer T3 is respectively arranged with current monitoring coil and protection coil, and an end of the protection coil of the secondary side of the said first current transformer T1 is connected with an end of said first capacitor C 1, and the other end of the protection coil of the secondary side of the said first current transformer T1 is connected with an end of the protection coil of the secondary side of the said second current transformer T2; The other end of the protection coil of the secondary side of the said second current transformer T2 is connected with an end of the protection coil of the secondary side of said the 3rd current transformer T3; The other end of the protection coil of the secondary side of said the 3rd current transformer T3 is connected with the other end of said first capacitor C 1, and the two ends of said first capacitor C 1 are connected with two inputs of said bridge rectifier D1 respectively, and the coil two ends of the two ends of said second capacitor C 2, said relay connect two outputs of said bridge rectifier D1 respectively.

The A end of the first siding ring of the first current transformer T1 of the said phase failure and observation circuit; The B end of the first siding ring of the second current transformer T2; The C end of the first siding ring of the 3rd current transformer T3 is connected in the three-phase circuit; The other end of the first siding ring of the said first current transformer T1, the other end of the first siding ring of the said second current transformer T2, the other end of the first siding ring of said the 3rd current transformer T3 are connected with the input signal circuit respectively; The current monitoring coil Ia of the second siding ring of the said first current transformer T1; The current monitoring coil Ib of the second siding ring of the said second current transformer T2; The monitoring coil Ic of the second siding ring of said the 3rd current transformer T3; Be connected respectively on the monitoring equipment, the operating current of goat is monitored in real time; Said first capacitor C 1 and said second capacitor C 2 play the function of filtering.When the operating current that monitors takes place when unusual, but block system relay quits work the motor of goat; When three-phase electricity is uneven or electric current secondary side voltage when reducing, said relay also can fall, and the input of shutoff signal quits work the motor of goat, and the motor that prevents goat burns out because of open-phase running for a long time.

The above-mentioned phase failure and observation circuit have replaced the open-phase protection circuit in the existing goat phase failure protector, make the goat relay protector not only have the function of open phase protection, have the function to the monitoring of goat operating current simultaneously; Can make right judgement to the variation of goat operating current timely, block system relay protection equipment makes that the design of goat phase failure protector is more perfect, saves production cost.

Should be noted that at last: above embodiment only in order to the explanation the utility model technical scheme but not to its restriction; Although with reference to preferred embodiment the utility model has been carried out detailed explanation, the those of ordinary skill in affiliated field is to be understood that: still can make amendment to the embodiment of the utility model perhaps is equal to replacement to the part technical characterictic; And not breaking away from the spirit of the utility model technical scheme, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.

Claims

1. novel goat phase failure protector; It comprises the goat phase failure protector; It is characterized in that: said goat phase failure protector includes the phase failure and observation circuit; Wherein, The said phase failure and observation circuit comprise first current transformer, second current transformer, the 3rd current transformer, first electric capacity, second electric capacity, bridge rectifier and relay; Wherein, The secondary side of said current transformer is respectively arranged with current monitoring coil and protection coil, and an end of the protection coil of the said first Current Transformer Secondary side is connected with an end of said first electric capacity, and the other end of the protection coil of the said first Current Transformer Secondary side is connected with an end of the protection coil of the said second Current Transformer Secondary side; The other end of the protection coil of the said second Current Transformer Secondary side is connected with an end of the protection coil of said the 3rd Current Transformer Secondary side; The other end of the protection coil of said the 3rd Current Transformer Secondary side is connected with the other end of said first electric capacity, and the two ends of said first electric capacity are connected with two inputs of said bridge rectifier respectively, and the coil two ends of the two ends of said second electric capacity, said relay connect two outputs of said bridge rectifier respectively.