CN210865878U

CN210865878U - Isolated current transformer

Info

Publication number: CN210865878U
Application number: CN201921852421.1U
Authority: CN
Inventors: 黄德欢; 吴小恒
Original assignee: Foshan Shunde Faraday Electric Appliance Manufacturing Co Ltd
Current assignee: Foshan Shunde Faraday Electric Appliance Manufacturing Co Ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-06-26
Anticipated expiration: 2029-10-31

Abstract

The utility model relates to a current transformer technical field just discloses an isolated current transformer, including the mutual-inductor shell, the surface cladding of mutual-inductor shell has insulating covering shell, the side fixed mounting of mutual-inductor shell inner chamber has insulating porcelain seat, the inboard fixedly connected with primary winding of insulating porcelain seat, the inboard fixedly connected with secondary winding that is located primary winding of insulating porcelain seat. This isolated current transformer can make the electromagnetic core and the primary winding and secondary winding that are in among the current transformer in the circuit break away from and then make between two windings not have the magnetic flux and then make current transformer's inside isolated but the circuit is not kept apart through the cooperation of micro motor and lead screw and removal seat and activity insulating seat, makes the electromagnetic core can not be overheated at the in-process that uses through the cooperation of semiconductor refrigerating plant and intercommunicating pore and gas outlet.

Description

Isolated current transformer

Technical Field

The utility model relates to a current transformer technical field specifically is an isolated current transformer.

Background

The current transformer is an instrument for converting a large primary side current into a small secondary side current to measure according to the electromagnetic induction principle, and consists of a closed iron core and a winding, wherein the primary side winding has few turns and is connected in series in a circuit of the current to be measured, so that all the current of the circuit always flows through the current transformer, the secondary side winding has more turns and is connected in series in a measuring instrument and a protection loop, and a secondary side loop of the current transformer is always closed when the current transformer works, so that the impedance of the series coil of the measuring instrument and the protection loop is very small, the working state of the current transformer is close to short circuit, the current transformer converts the large primary side current into the small secondary side current to measure, and the secondary side.

Current transformer that uses now leads to current transformer to appear damaging in the in-process fixed connection that uses in the circuit of measurement easily for a long time, can't keep apart current transformer, and the in-process switch blade that uses moreover cuts off the power supply and keeps apart under the condition, but current transformer can't keep apart with the circuit simultaneously, if want to keep apart still need install other isolation switch at current transformer's input end, relatively troublesome.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides an isolated current transformer possesses the isolation that can realize the circuit both sides, also can realize the isolation between circuit and the current transformer, also can realize the advantage that the mutual-inductor keeps apart but the circuit does not keep apart inside the current transformer, has solved the problem mentioned in the above background art.

The utility model provides a following technical scheme: an isolated current transformer comprises a transformer shell, wherein an insulating coating shell is coated on the outer surface of the transformer shell, an insulating porcelain seat is fixedly mounted on the side surface of an inner cavity of the transformer shell, a primary winding is fixedly connected to the inner side of the insulating porcelain seat, a secondary winding is fixedly connected to the inner side of the insulating porcelain seat, an electromagnetic isolation seat is fixedly mounted between the primary winding and the secondary winding on the inner side of the insulating porcelain seat, an electromagnetic iron core is slidably mounted in the electromagnetic isolation seat, the primary winding and the secondary winding are sleeved on the outer side of the electromagnetic iron core and are not in contact with each other, a first connector lug is fixedly connected to the output end and the input end of the primary winding, a secondary connector lug is fixedly connected to the output end and the input end of the secondary winding, and the top of the secondary connector lug penetrates through the transformer shell and extends to the upper side of, the right side surface of the electromagnetic iron core is fixedly connected with a movable insulating seat, the right side surface of the mutual inductor shell is fixedly provided with a connecting seat, the right side surface of the connecting seat is fixedly connected with a fixed insulating seat, the right side surface of the fixed insulating seat is fixedly provided with a micro motor, the output end of the micro motor penetrates through the fixed insulating seat and extends to the inside of the connecting seat, the lead screw is fixedly connected with a lead screw, the outer surface of the lead screw is in threaded connection with a moving seat, the front surface of the moving seat is fixedly connected with the back of the movable insulating seat, the top of the connecting seat is fixedly provided with a refrigerating chamber, the inside of the refrigerating chamber is fixedly provided with a semiconductor refrigerating device, the top of the connecting seat is positioned below the refrigerating chamber and is provided with a communication hole, the bottom of the connecting seat is fixedly communicated with an air outlet, the left side, the bottom movable mounting of first digging arm has the second digging arm, the left surface fixed mounting of mutual-inductor shell has electric telescopic handle, electric telescopic handle's top fixed mounting has the backup pad, the side of backup pad is articulated with the bottom activity of second digging arm.

Preferably, a conductive head is fixedly mounted on the side face of the top of the first movable arm, a sleeve insulator is fixedly sleeved on the outer surface of the first connector lug, and a conductive connecting seat matched with the conductive head is fixedly connected to one end, located above the sleeve insulator, of the first connector lug.

Preferably, an external electric connection wire connected with the conductive head is placed on the inner side surface of the first movable arm.

Preferably, the back of the connecting seat is fixedly provided with a storage battery.

Preferably, the area value of the longitudinal section of the inner cavity of the connecting seat in front of the screw rod is the same as the area value of the longitudinal section of the electromagnetic iron core.

Compared with the prior art, the utility model discloses possess following beneficial effect:

1. this isolated current transformer can make the electromagnetic core and the primary winding and secondary winding that are in among the current transformer in the circuit break away from and then make between two windings not have the magnetic flux and then make current transformer's inside isolated but the circuit is not kept apart through the cooperation of micro motor and lead screw and removal seat and activity insulating seat, makes the electromagnetic core can not be overheated at the in-process that uses through the cooperation of semiconductor refrigerating plant and intercommunicating pore and gas outlet.

2. This isolated current transformer makes the device keep apart the circuit when can keep apart current transformer simultaneously through the cooperation of electric telescopic handle and second digging arm and first digging arm and conductive head and electrically conductive connecting seat, plays the effect of an isolation switch.

Drawings

FIG. 1 is a sectional view of the present invention;

fig. 2 is a left side view of the structure of the present invention.

In the figure: 1. a transformer housing; 2. an electromagnetic core; 3. a first connector lug; 4. an electromagnetic isolation seat; 5. a secondary connector lug; 6. a secondary winding; 7. a movable insulating base; 8. a movable seat; 9. a semiconductor refrigeration device; 10. a refrigeration compartment; 11. a communicating hole; 12. a connecting seat; 13. fixing an insulating seat; 14. a micro motor; 15. a screw rod; 16. an air outlet; 17. an electric telescopic rod; 18. an insulating ceramic base; 19. a primary winding; 20. an insulating clad shell; 21. a support plate; 22. a bushing insulator; 23. a conductive connecting seat; 24. a conductive head; 25. a first movable arm; 26. a rotating shaft; 27. a second movable arm.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, an isolated current transformer includes a transformer housing 1, an insulating coating 20 is coated on the outer surface of the transformer housing 1, an insulating ceramic base 18 is fixedly mounted on the side surface of the inner cavity of the transformer housing 1, a primary winding 19 is fixedly connected on the inner side of the insulating ceramic base 18, a secondary winding 6 is fixedly connected on the inner side of the insulating ceramic base 18 on the right side of the primary winding 19, an electromagnetic isolation base 4 is fixedly mounted on the inner side of the insulating ceramic base 18 between the primary winding 19 and the secondary winding 6, the electromagnetic isolation base 4 can prevent the magnetic flux generated by the primary winding 19 from acting on the electromagnetic core 2 remotely, the electromagnetic core 2 is slidably mounted inside the electromagnetic isolation base 4, the primary winding 19 and the secondary winding 6 are sleeved on the outer side of the electromagnetic core 2 and do not contact, the output end and the input end of the primary winding 19 are fixedly connected with a first connector 3, the output end and the input end of the secondary winding 6 are fixedly connected with a secondary connector lug 5, the top of the secondary connector lug 5 penetrates through the transformer shell 1 and extends to the upper part of the transformer shell 1, the right side surface of the electromagnetic core 2 is fixedly connected with a movable insulating seat 7, the right side surface of the transformer shell 1 is fixedly provided with a connecting seat 12, the back of the connecting seat 12 is fixedly provided with a storage battery, the storage battery supplies power for a micro motor 14, a semiconductor refrigerating device 9 and an electric telescopic rod 17, the right side surface of the connecting seat 12 is fixedly connected with a fixed insulating seat 13, the right side surface of the fixed insulating seat 13 is fixedly provided with the micro motor 14, the output end of the micro motor 14 penetrates through the fixed insulating seat 13 and extends to the inside of the connecting seat 12 and is fixedly connected with a lead screw 15, the area value of the longitudinal section of the inner, the outer surface of the screw rod 15 is in threaded connection with a movable seat 8, the front surface of the movable seat 8 is fixedly connected with the back of a movable insulating seat 7, the electromagnetic iron core 2 in a current transformer in a circuit can be separated from a primary winding 19 and a secondary winding 6 through the matching of a micro motor 14 and the screw rod 15 as well as the movable seat 8 and the movable insulating seat 7, so that no magnetic flux exists between the two windings, the interior of the current transformer is isolated but the circuit is not isolated, a refrigerating chamber 10 is fixedly installed at the top of a connecting seat 12, a semiconductor refrigerating device 9 is fixedly installed in the refrigerating chamber 10, a communication hole 11 is formed in the top of the connecting seat 12 and below the refrigerating chamber 10, an air outlet 16 is fixedly communicated with the bottom of the connecting seat 12, and the electromagnetic iron core 2 cannot be overheated in the using process through the matching of the semiconductor refrigerating device 9, the communication, there is pivot 26 left surface movable mounting of mutual-inductor shell 1, the surface movable mounting of pivot 26 has first digging arm 25, the bottom movable mounting of first digging arm 25 has second digging arm 27, the left surface fixed mounting of mutual-inductor shell 1 has electric telescopic handle 17, electric telescopic handle 17's top fixed mounting has backup pad 21, the side of backup pad 21 is articulated with the bottom activity of second digging arm 27, first digging arm 25 top side fixed mounting has conductive head 24, the fixed surface cover of first connector lug 3 is equipped with bushing insulator 22, the one end fixedly connected with of first connector lug 3 position in bushing insulator 22 top leads conductive head 24 matched with electrically conductive connecting seat 23, the external electric connecting wire that is connected with conductive head 24 is placed to the medial surface of first digging arm 25, external connecting wire is the circuit that awaits measuring, make the device can make through the cooperation of electric telescopic handle 17 and second digging arm 27 and first digging arm 25 and conductive head 24 and electrically conductive connecting seat 23 and electrically conductive head 24, the device can The current transformer is isolated, and the circuit is isolated, so that the function of isolating the disconnecting link is achieved.

Working principle, when needs keep apart the mutual-inductor body, control micro motor 14 through controlling means this moment and drive lead screw 15 and rotate and then make and remove seat 8 and remove to the right side, remove seat 8 and drive electromagnetic core 2 and primary winding 19 through activity insulating seat 7 and break away from, and move the right side of electromagnetism isolation seat 4 and then make electromagnetic core's inside not have the magnetic flux, and then realize keeping apart, when needs keep apart external circuit and mutual-inductor simultaneously, electric telescopic handle 17 drives backup pad 21 and up moves and then makes two first digging arms 25 rotate round pivot 26 outside to the outside and then make conducting head 24 and conducting connecting seat 23 separate and then make the main line break off through second digging arm 27 this moment, and then realize the isolation of the circuit that awaits measuring.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An isolated current transformer, includes transformer shell (1), its characterized in that: the transformer comprises a transformer shell (1), wherein the outer surface of the transformer shell (1) is coated with an insulating coating shell (20), the side surface of the inner cavity of the transformer shell (1) is fixedly provided with an insulating porcelain seat (18), the inner side of the insulating porcelain seat (18) is fixedly provided with a primary winding (19), the inner side of the insulating porcelain seat (18) is positioned on the right side of the primary winding (19) and is fixedly connected with a secondary winding (6), the inner side of the insulating porcelain seat (18) is positioned between the primary winding (19) and the secondary winding (6) and is fixedly provided with an electromagnetic isolation seat (4), the electromagnetic isolation seat (4) is internally provided with an electromagnetic core (2) in a sliding manner, the primary winding (19) and the secondary winding (6) are sleeved outside the electromagnetic core (2) and are not in contact with each other, the output end and the input end of the primary winding (19) are fixedly connected with a first connector lug (3), and the output end, the top of secondary connector lug (5) runs through mutual inductor shell (1) and extends to the top of mutual inductor shell (1), the right flank fixedly connected with activity insulating seat (7) of electromagnetic core (2), the right flank fixed mounting of mutual inductor shell (1) has connecting seat (12), the right flank fixedly connected with fixed insulating seat (13) of connecting seat (12), the right flank fixed mounting of fixed insulating seat (13) has micro motor (14), the output of micro motor (14) runs through fixed insulating seat (13) and extends to the inside of connecting seat (12) and fixedly connected with lead screw (15), the surface threaded connection of lead screw (15) has removal seat (8), the front of removal seat (8) and the back fixed connection of activity insulating seat (7), the top fixed mounting of connecting seat (12) has refrigeration room (10), the inside fixed mounting of refrigeration room (10) has semiconductor refrigerating plant (9), intercommunicating pore (11) have been seted up to the below that the top of connecting seat (12) is located refrigeration room (10), the fixed intercommunication in bottom of connecting seat (12) has gas outlet (16), the left surface movable mounting of mutual-inductor shell (1) has pivot (26), the surface movable mounting of pivot (26) has first digging arm (25), the bottom movable mounting of first digging arm (25) has second digging arm (27), the left surface fixed mounting of mutual-inductor shell (1) has electric telescopic handle (17), the top fixed mounting of electric telescopic handle (17) has backup pad (21), the side of backup pad (21) is articulated with the bottom activity of second digging arm (27).

2. An isolated current transformer according to claim 1, wherein: first digging arm (25) top side fixed mounting has conductive head (24), the fixed surface cover of first connector lug (3) is equipped with sleeve pipe insulator (22), one end fixedly connected with conductive head (24) matched with electrically conductive connecting seat (23) that first connector lug (3) are located sleeve pipe insulator (22) top.

3. An isolated current transformer according to claim 1, wherein: and an external electric connection wire connected with the conductive head (24) is arranged on the inner side surface of the first movable arm (25).

4. An isolated current transformer according to claim 1, wherein: and a storage battery is fixedly arranged at the back of the connecting seat (12).

5. An isolated current transformer according to claim 1, wherein: the area value of the longitudinal section of the inner cavity of the connecting seat (12) in front of the screw rod (15) is the same as that of the longitudinal section of the electromagnetic iron core (2).