CN216052151U - Current transformer characteristic test box - Google Patents
Current transformer characteristic test box Download PDFInfo
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- CN216052151U CN216052151U CN202122397181.4U CN202122397181U CN216052151U CN 216052151 U CN216052151 U CN 216052151U CN 202122397181 U CN202122397181 U CN 202122397181U CN 216052151 U CN216052151 U CN 216052151U
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Abstract
The utility model discloses a current transformer characteristic test box which comprises a box body, wherein one end of the box body is provided with a plurality of wiring ports, and wiring sockets are arranged in the wiring ports and are connected with test equipment; a first-stage switching mechanism, a second-stage switching mechanism and a third-stage switching mechanism are arranged in the box body and are connected with the wiring socket. The device solves the problems that in the prior art, the wiring needs to be frequently disconnected, restored and changed in different phases and different windings during wiring, and the working efficiency is low.
Description
Technical Field
The utility model belongs to the technical field of mutual inductor testing, and particularly relates to a current mutual inductor characteristic test box.
Background
The current transformer is one of common devices in power production, converts large current of primary equipment into small current, and is used for secondary circuits of relay protection or metering and the like. The characteristic test of the current transformer plays a crucial role in the selection of the type of the current transformer, the design of a secondary circuit of the current transformer and the analysis of the operation condition of the current transformer, for example, the current transformer for relay protection needs to check a 10% error curve and secondary load of the current transformer, and the selection of the type of the current transformer is determined. Because the field current transformer is mostly a three-phase multi-winding transformer, the current characteristic test needs operators to frequently disconnect, restore and change test wiring in different phases of the transformer and different windings, and frequently adjust the parameter setting of the transformer tester according to the test requirements, so that the workload of the operators is increased, and the test efficiency is seriously influenced.
In view of the above situation, it is necessary to design a current transformer characteristic test box to solve the above problems.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a current transformer characteristic test box, solves the problems that in the prior art, disconnection, connection recovery and connection change are frequently carried out on different phases and different windings during connection, and the operation efficiency is low, and has the characteristics of convenience in connection, capability of switching connection by direct switching and high efficiency.
In order to realize the technical effects, the utility model adopts the technical scheme that: a current transformer characteristic test box comprises a box body, wherein one end of the box body is provided with a plurality of wiring ports, and wiring sockets are arranged in the wiring ports and are connected with test equipment; a first-stage switching mechanism, a second-stage switching mechanism and a third-stage switching mechanism are arranged in the box body and are connected with the wiring socket.
Furthermore, the connection socket is a banana socket, and the socket port is provided with a label corresponding to the contact.
Preferably, the test equipment comprises a current transformer and a transformer tester.
Preferably, the primary switching mechanism comprises an AS1 diverter switch, an AS2 diverter switch, and an AL diverter switch; one end of the AS1 change-over switch is connected with the S1 end of different windings of the A phase of the current transformer, and the other end is connected with the secondary switch mechanism; one end of the AS2 change-over switch is connected with the S2 end of different windings of the A phase of the current transformer, and the other end is connected with the secondary switch mechanism; one end of the AL change-over switch is connected with the L ends of the different windings of the A phase of the current transformer, and the other end of the AL change-over switch is connected with the secondary switch mechanism.
Preferably, the primary switching mechanism comprises a BS1 transfer switch, a BS2 transfer switch and a BL transfer switch; one end of the BS1 change-over switch is connected with the S1 end of the different windings of the B phase of the current transformer, and the other end is connected with the secondary switch mechanism; one end of the BS2 change-over switch is connected with the S2 end of the different windings of the B phase of the current transformer, and the other end is connected with the secondary switch mechanism; one end of the BL conversion switch is connected with the L ends of the different windings of the B phase of the current transformer, and the other end of the BL conversion switch is connected with the secondary switch mechanism.
Preferably, the primary switching mechanism comprises a CS1 transfer switch, a CS2 transfer switch, and a CL transfer switch; one end of the CS1 change-over switch is connected with the S1 end of different windings of the current transformer C phase, and the other end is connected with the secondary switch mechanism; one end of the CS2 change-over switch is connected with the S2 end of different windings of the current transformer C phase, and the other end is connected with the secondary switch mechanism; one end of the CL change-over switch is connected with the L ends of different windings of the C phase of the current transformer, and the other end of the CL change-over switch is connected with the secondary switch mechanism.
Preferably, the primary switching mechanism includes a P1 transfer switch and a P2 transfer switch; one end of a P1 change-over switch is respectively connected with the P1 ends of the three phases of the current transformer, and the other end of the change-over switch is connected with a P1 interface of the transformer tester; one end of the P2 change-over switch is respectively connected with the P2 end of the three phases of the current transformer, and the other end is connected with the P2 interface of the transformer tester.
Preferably, the secondary switching mechanism includes an S1 switch, an S2 switch, and an L switch; one end of the S1 change-over switch is respectively connected with the AS1 change-over switch, the BS1 change-over switch and the CS1 change-over switch; one end of the S2 change-over switch is respectively connected with the AS2 change-over switch, the BS2 change-over switch and the CS2 change-over switch; one end of the L change-over switch is respectively connected with the AL change-over switch, the BL change-over switch and the CL change-over switch.
Preferably, the three-stage switch mechanism comprises an SL conversion switch, one end of the SL conversion switch is connected with the S1 conversion switch and the L conversion switch, and the other end of the SL conversion switch is connected with the S1 and the M1 interface of the transformer tester.
Preferably, the other end of the S2 transfer switch is connected with the S2 and M2 interfaces of the instrument transformer tester.
Preferably, the first-stage switch mechanism and the second-stage switch mechanism are three-gear free change-over switches, the contacts 1 and 2 are switched to the 1-gear position and are conducted, the contacts 3 and 4 are switched to the 2-gear position and the contacts 5 and 6 are switched to the 3-gear position, and zero gears are provided to ensure that all the contacts are not conducted; the three-level switch mechanism is a two-level free change-over switch, is switched to the 1-gear position to conduct the contacts 1 and 2, is switched to the 2-gear position to conduct the contacts 3 and 4, and has zero gear position to make all the contacts not conducted.
Further, the wire grouping between different phases is distinguished by different colors, so that the wire grouping is convenient to distinguish by appearance and carry out maintenance inspection.
The current transformer characteristic test box provided by the utility model has the following beneficial effects:
this patent is through change over switch, accomplishes the different looks of three phase current transformer, the experimental wiring of secondary winding group class characteristic and switches, realizes the body and the secondary load characteristic test of three phase current transformer different looks, different secondary winding, can increase substantially the operating efficiency, practices thrift manpower and material resources.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic wiring diagram of the present invention;
FIG. 2 is a schematic external view of the present invention;
the reference numbers in the figures are: the system comprises a box body 1, an AS1 change-over switch 6, an AS2 change-over switch 7, an AL change-over switch 8, a BS1 change-over switch 9, a BS2 change-over switch 10, a BL change-over switch 11, a CS1 change-over switch 12, a CS2 change-over switch 13, a CL change-over switch 14, a P1 change-over switch 15, a P2 change-over switch 16, a S1 change-over switch 17, a S2 change-over switch 18, an L change-over switch 19, a SL change-over switch 20, a current transformer A phase 21, a current transformer B phase 22, a current transformer C phase 23, a transformer tester 31, a wiring port 32 and a wiring socket 33.
Detailed Description
As shown in fig. 1-2, a current transformer characteristic test box includes a box body 1, a plurality of wiring ports 32 are provided at one end of the box body 1, and a wiring socket 33 is provided in the wiring ports 32. Connecting with a test device; a first-stage switching mechanism, a second-stage switching mechanism and a third-stage switching mechanism are arranged in the box body 1 and connected with the wiring socket 33.
Further, the connection socket 33 is a banana socket, and the socket opening is provided with a label corresponding to the contact.
Preferably, the test equipment includes a current transformer and transformer tester 31.
Preferably, the primary switching mechanism includes AS1 switch 6, AS2 switch 7, and AL switch 8; one end of the AS1 change-over switch 6 is connected with the S1 end of different windings of the A phase 21 of the current transformer, and the other end is connected with the secondary switch mechanism; one end of the AS2 change-over switch 7 is connected with the S2 end of different windings of the A phase 21 of the current transformer, and the other end is connected with the secondary switch mechanism; one end of the AL change-over switch 8 is connected with the L ends of the different windings of the A phase 21 of the current transformer, and the other end is connected with the secondary switch mechanism.
Preferably, the primary switching mechanism includes a BS1 switch 9, a BS2 switch 10, and a BL switch 11; one end of a BS1 change-over switch 9 is connected with the S1 end of different windings of the B phase 22 of the current transformer, and the other end is connected with a secondary switch mechanism; one end of a BS2 change-over switch 10 is connected with the S2 end of different windings of the B phase 22 of the current transformer, and the other end is connected with a secondary switch mechanism; one end of the BL conversion switch 11 is connected with the L ends of different windings of the B phase 22 of the current transformer, and the other end is connected with the secondary switch mechanism.
Preferably, the primary switching mechanism includes CS1 change-over switch 12, CS2 change-over switch 13, and CL change-over switch 14; one end of the CS1 change-over switch 12 is connected with the S1 end of different windings of the C phase 23 of the current transformer, and the other end is connected with the secondary switch mechanism; one end of the CS2 change-over switch 13 is connected with the S2 end of different windings of the C phase 23 of the current transformer, and the other end is connected with the secondary switch mechanism; one end of the CL change-over switch 14 is connected with the L ends of different windings of the C phase 23 of the current transformer, and the other end is connected with the secondary switch mechanism.
Preferably, the primary switching mechanism includes a P1 switch 15 and a P2 switch 16; one end of the P1 change-over switch 15 is respectively connected with the P1 end of the three phases of the current transformer, and the other end is connected with the P1 interface of the transformer tester 31; one end of the P2 change-over switch 16 is connected to the P2 ends of the three phases of the current transformer, and the other end is connected to the P2 interface of the transformer tester 31.
Preferably, the two-stage switching mechanism includes the S1 changeover switch 17, the S2 changeover switch 18, and the L changeover switch 19; one end of the S1 change-over switch 17 is respectively connected with the AS1 change-over switch 6, the BS1 change-over switch 9 and the CS1 change-over switch 12; one end of the S2 change-over switch 18 is respectively connected with the AS2 change-over switch 7, the BS2 change-over switch 10 and the CS2 change-over switch 13; one end of the L switch 19 is connected to the AL switch 8, the BL switch 11, and the CL switch 14, respectively.
Preferably, the three-stage switch mechanism includes an SL switch 20, one end of the SL switch 20 is connected to the S1 switch 17 and the L switch 19, and the other end of the SL switch 20 is interfaced with S1 and M1 of the transformer tester 31.
Preferably, the other end of the S2 transfer switch 18 interfaces with the S2, M2 of the transformer tester 31.
Preferably, the first-stage switch mechanism and the second-stage switch mechanism are three-gear free change-over switches, the contacts 1 and 2 are switched to the 1-gear position and are conducted, the contacts 3 and 4 are switched to the 2-gear position and the contacts 5 and 6 are switched to the 3-gear position, and zero gears are provided to ensure that all the contacts are not conducted; the three-level switch mechanism is a two-level free change-over switch, is switched to the 1-gear position to conduct the contacts 1 and 2, is switched to the 2-gear position to conduct the contacts 3 and 4, and has zero gear position to make all the contacts not conducted.
Further, the wire grouping between different phases is distinguished by different colors, so that the wire grouping is convenient to distinguish by appearance and carry out maintenance inspection.
The working principle of the characteristic test box of the current transformer provided by the utility model is as follows:
the implementation of related primary and secondary safety measures of the current transformer is finished, the current transformer is reliably disconnected from primary equipment, one optional end of P1 or P2 is reliably grounded, and a secondary circuit of the current transformer connected with an operation device is sealed, so that the misoperation caused by adding the current transformer to the operation device in the test process is avoided; and (3) removing the cable at the end S1 of the secondary wiring terminal of the current transformer body, and connecting all the first and second test wires of the three-phase current transformer into the corresponding wiring socket 33 according to the phase and secondary winding groups of the three-phase current transformer in the characteristic test box of the current transformer as shown in figure 1. The current transformer body characteristic test, the current transformer secondary load characteristic test and other tests can be carried out through rotating the related change-over switch.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.
Claims (10)
1. The utility model provides a current transformer characteristic test case which characterized in that: the testing device comprises a box body (1), wherein one end of the box body (1) is provided with a plurality of wiring ports (32), and wiring sockets (33) are arranged in the wiring ports (32) and connected with testing equipment; a first-stage switching mechanism, a second-stage switching mechanism and a third-stage switching mechanism are arranged in the box body (1) and are connected with the wiring socket (33).
2. A current transformer characteristic test chamber according to claim 1, wherein: the testing apparatus includes a current transformer and a transformer tester (31).
3. A current transformer characteristic test chamber according to claim 1, wherein: the primary switch mechanism comprises an AS1 change-over switch (6), an AS2 change-over switch (7) and an AL change-over switch (8); one end of the AS1 change-over switch (6) is connected with the S1 end of different windings of the A phase (21) of the current transformer, and the other end is connected with the secondary switch mechanism; one end of the AS2 change-over switch (7) is connected with the S2 end of different windings of the A phase (21) of the current transformer, and the other end is connected with the secondary switch mechanism; one end of an AL change-over switch (8) is connected with the L ends of different windings of the A phase (21) of the current transformer, and the other end of the AL change-over switch is connected with a secondary switch mechanism.
4. A current transformer characteristic test chamber according to claim 1, wherein: the primary switch mechanism comprises a BS1 change-over switch (9), a BS2 change-over switch (10) and a BL change-over switch (11); one end of a BS1 change-over switch (9) is connected with the S1 end of different windings of the B phase (22) of the current transformer, and the other end is connected with a secondary switch mechanism; one end of a BS2 change-over switch (10) is connected with the S2 end of different windings of the B phase (22) of the current transformer, and the other end is connected with a secondary switch mechanism; one end of the BL conversion switch (11) is connected with the L ends of different windings of the B phase (22) of the current transformer, and the other end of the BL conversion switch is connected with the secondary switch mechanism.
5. A current transformer characteristic test chamber according to claim 1, wherein: the primary switch mechanism comprises a CS1 change-over switch (12), a CS2 change-over switch (13) and a CL change-over switch (14); one end of the CS1 change-over switch (12) is connected with the S1 end of different windings of the C phase (23) of the current transformer, and the other end is connected with the secondary switch mechanism; one end of a CS2 change-over switch (13) is connected with the S2 end of different windings of the C phase (23) of the current transformer, and the other end is connected with a secondary switch mechanism; one end of the CL transfer switch (14) is connected with the L ends of different windings of the C phase (23) of the current transformer, and the other end is connected with the secondary switch mechanism.
6. A current transformer characteristic test chamber according to claim 1, wherein: the primary switching mechanism comprises a P1 change-over switch (15) and a P2 change-over switch (16); one end of a P1 change-over switch (15) is respectively connected with the P1 end of the three phases of the current transformer, and the other end is connected with a P1 interface of a transformer tester (31); one end of a P2 change-over switch (16) is respectively connected with the P2 end of the three phases of the current transformer, and the other end is connected with a P2 interface of a transformer tester (31).
7. A current transformer characteristic test chamber according to claim 1, wherein: the secondary switch mechanism comprises an S1 change-over switch (17), an S2 change-over switch (18) and an L change-over switch (19); one end of the S1 change-over switch (17) is respectively connected with the AS1 change-over switch (6), the BS1 change-over switch (9) and the CS1 change-over switch (12); one end of the S2 change-over switch (18) is respectively connected with the AS2 change-over switch (7), the BS2 change-over switch (10) and the CS2 change-over switch (13); one end of the L transfer switch (19) is connected to the AL transfer switch (8), the BL transfer switch (11), and the CL transfer switch (14), respectively.
8. A current transformer characteristic test chamber according to claim 1, wherein: the three-stage switch mechanism comprises an SL change-over switch (20), one end of the SL change-over switch (20) is connected with an S1 change-over switch (17) and an L change-over switch (19), and the other end of the SL change-over switch (20) is connected with interfaces S1 and M1 of a transformer tester (31).
9. A current transformer characteristic test chamber according to claim 7, wherein: the other end of the S2 change-over switch (18) is connected with the interfaces S2 and M2 of the mutual inductor tester (31).
10. A current transformer characteristic test chamber according to claim 1, wherein: the first-stage switch mechanism and the second-stage switch mechanism are both three-gear free change-over switches, and the third-stage switch mechanism is a two-gear free change-over switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122397181.4U CN216052151U (en) | 2021-09-30 | 2021-09-30 | Current transformer characteristic test box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122397181.4U CN216052151U (en) | 2021-09-30 | 2021-09-30 | Current transformer characteristic test box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216052151U true CN216052151U (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122397181.4U Active CN216052151U (en) | 2021-09-30 | 2021-09-30 | Current transformer characteristic test box |
Country Status (1)
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|---|---|
| CN (1) | CN216052151U (en) |
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2021
- 2021-09-30 CN CN202122397181.4U patent/CN216052151U/en active Active
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