CN220137284U

CN220137284U - Electronic type FTU test fixture

Info

Publication number: CN220137284U
Application number: CN202321597336.1U
Authority: CN
Inventors: 刘凌云; 李号; 张新红; 孙志印; 唐洪; 随瑞真; 张启顺; 石国忠; 王树超; 韩湛江
Original assignee: Zhongbao Electric Co ltd
Current assignee: Zhongbao Electric Co ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2023-12-05
Anticipated expiration: 2033-06-21

Abstract

The utility model provides an electronic type FTU test fixture, which comprises a test fixture main body, wherein four voltage conversion modules and four current conversion modules are arranged in the test fixture main body, a panel is arranged on the outer side of the test fixture main body, and an input end interface and an output end interface are arranged on the panel.

Description

Electronic type FTU test fixture

Technical Field

The utility model belongs to the technical field of power grid test tools, and particularly relates to an electronic FTU test tool.

Background

In the power distribution network industry, an FTU (feeder terminal equipment) is used as an important power grid remote control, remote measurement, remote signaling and fault detection device in a power grid, and can communicate with a distribution network automation master station to provide important running state conditions in a power distribution system and necessary information required by measurement of various parameters, including electric energy parameters, breaker switch states, three-phase fault conditions, ground fault conditions and parameters during faults.

The types of the FTU comprise an electromagnetic type FTU and an electronic type FTU, wherein the signal acquisition mode of the electronic type FTU is to convert high-voltage and high-current signals on a circuit breaker into low-voltage small signals, and the signals can be directly acquired through a signal conversion module built in the circuit breaker on a circuit. However, when testing and demonstrating the device, most of the testing devices capable of meeting signal conversion are professional test tables, the volume is large, the manufacturing cost is high, most of the traditional testing devices do not have the function of converting high-voltage and high-current small signals, the accuracy of the output testing signals is low, the testing requirements of the electronic type FTU cannot be met, and the testing efficiency of the electronic type FTU is greatly reduced.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides an electronic FTU test fixture which improves the test efficiency, is small in size and low in manufacturing cost.

The technical scheme of the utility model is as follows: the electronic type FTU test fixture comprises a test fixture main body, wherein four voltage conversion modules and four current conversion modules are arranged in the test fixture main body, a panel is arranged on the outer side of the test fixture main body, and an input end interface and an output end interface are arranged on the panel;

the input end interface is provided with a UA interface, a UB interface, a UC interface, a U0 interface, a UGD interface, an IA interface, an IB interface, an IC interface, an I0 interface and an IGND interface;

the output end interface is provided with a Ua2 interface, a Ub2 interface, a Uc2 interface, a U02 interface, a Un2 interface, an Ia2 interface, an Ib2 interface, an Ic2 interface, an I02 interface and an IN interface;

the input ends of the four voltage conversion modules and the four current conversion modules are connected with the input end interface in a matched mode, and the output ends of the four voltage conversion modules and the four current conversion modules are connected with the output end interface in a matched mode.

The 2IN ends of the four voltage conversion modules are connected with the UGD interface, the 1 IN ends of the four voltage conversion modules are connected with the UA interface, the UB interface, the UC interface and the U0 interface respectively, the 4OUT ends of the four voltage conversion modules are connected with the Un2 interface, and the 6 OUT ends of the four voltage conversion modules are connected with the Ua2 interface, the Ub2 interface, the Uc2 interface and the U02 interface respectively.

The 2NC ends of the four current conversion modules are connected with the IGND interface, the 1NC ends of the four current conversion modules are respectively connected with the IA interface, the IB interface, the IC interface and the I0 interface, the 4OUT ends of the four current conversion modules are respectively connected with the IN interface, and the 6 xOUT ends of the four current conversion modules are respectively connected with the Ia2 interface, the Ib2 interface, the IC2 interface and the I02 interface.

The input end interfaces and the output end interfaces are banana sockets.

The current conversion module adopts a precise current transformer with the model number of TR 0176-4C; the voltage conversion module adopts a precise voltage transformer with the model number of TR 1176-3C.

An opening/closing signal module is arranged in the test tool main body, and comprises a first relay and a second relay which are interlocked;

the panel is provided with a YXCOM interface, a HW interface, a FW interface, a FZ+ interface, a HZ+ interface, a CN+ interface, a YKCOM interface, a brake-off lamp and a brake-on lamp;

the switching-on lamp and a normally open contact of the relay are connected in series between the YXCOM interface and the HW interface;

and the switching-off lamp and the normally open contact of the other relay are connected in series between the YXCOM interface and the FW interface.

The first relay and the second relay are both double-coil magnetic latching relays.

The double-coil magnetic latching relay is a double-coil magnetic latching relay with the model of HFD2/024-M-L2 (555).

The utility model has the beneficial effects that: the utility model adopts the mode of converting high-voltage and high-current signals by the precision transformer to replace the method for generating small signals by using the test power supply, can more accurately and conveniently generate the small-voltage signals required by the electronic type FTU test, improves the test efficiency, and has small volume and low cost.

Drawings

Fig. 1 is a schematic diagram of a panel structure of an electronic FTU test fixture according to the present utility model.

Fig. 2 is a schematic diagram illustrating connection of a voltage conversion module according to the present utility model.

Fig. 3 is a schematic diagram illustrating connection of a current conversion module according to the present utility model.

Fig. 4 is a schematic connection diagram of the switch in/out signal module in the present utility model.

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is in no way intended to limit the utility model, its application, or uses. The present utility model may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.

The terms "first," "second," and the like, as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

As shown in fig. 1 to 3, the electronic FTU test fixture comprises a test fixture body, wherein four voltage conversion modules 2 and four current conversion modules 3 are arranged in the test fixture body, a panel 1 is arranged on the outer side of the test fixture body, and an input end interface and an output end interface are arranged on the panel 1; the input end interface is provided with a UA interface, a UB interface, a UC interface, a U0 interface, a UGD interface, an IA interface, an IB interface, an IC interface, an I0 interface and an IGND interface; the output end interface is provided with a Ua2 interface, a Ub2 interface, a Uc2 interface, a U02 interface, a Un2 interface, an Ia2 interface, an Ib2 interface, an Ic2 interface, an I02 interface and an IN interface; the input ends of the four voltage conversion modules 2 and the four current conversion modules 3 are connected with the input end interface in a matched manner, and the output ends of the four voltage conversion modules 2 and the four current conversion modules 3 are connected with the output end interface in a matched manner; in the embodiment, the four voltage conversion modules 2 and the four current conversion modules 3 can convert high-voltage and high-current signals output by the test power supply into uniform small-voltage signals, and accurate conversion of the large signals can be achieved by adopting precise voltage and current transformers so as to meet the input signal requirements of the electronic FTU; the method for generating the small signal by using the test power supply is replaced by adopting a mode of converting the high-voltage and large-current signals by using the precision transformer, so that the small-voltage signal required by the electronic type FTU test can be generated more accurately and conveniently, the test efficiency is improved, and the electronic type FTU test device is small in size and low in cost.

IN some embodiments, as a more specific connection manner of the four voltage conversion modules 2, as shown IN fig. 2, the 2IN ends of the four voltage conversion modules 2 are all connected with UGND interfaces, the 1 x IN ends of the four voltage conversion modules 2 are respectively connected with UA interfaces, UB interfaces, UC interfaces and U0 interfaces, the 4OUT ends of the four voltage conversion modules 2 are all connected with Un2 interfaces, and the 6 x OUT ends of the four voltage conversion modules 2 are respectively connected with UA2 interfaces, UB2 interfaces, UC2 interfaces and U02 interfaces; the voltage conversion module is formed by using precise voltage transformers, wherein four precise voltage transformers are used, a common end is in short circuit and serves as a three-phase voltage input common end, each input end is respectively the phase voltage and the zero sequence voltage of a three-phase power supply, and the output voltage is a converted small voltage signal.

IN some embodiments, as a more specific connection manner of the four current conversion modules 3, as shown IN fig. 3, the 2NC ends of the four current conversion modules 3 are all connected with the IGND interface, the 1NC ends of the four current conversion modules 3 are respectively connected with the IA interface, the IB interface, the IC interface and the I0 interface, the 4OUT ends of the four current conversion modules 3 are all connected with the IN interface, and the 6 OUT ends of the four current conversion modules 3 are respectively connected with the IA2 interface, the IB2 interface, the IC2 interface and the I02 interface; the precise current transformers are used to form a current conversion module, wherein four precise current transformers are used, a common end is in short circuit and serves as an input common end of three-phase current, each input end is respectively the current of each phase and zero sequence current of a three-phase power supply, and an output signal is a small voltage signal.

IN some embodiments, the input interfaces UA interface, UB interface, UC interface, U0 interface, UGND interface, IA interface, IB interface, IC interface, I0 interface, IGND interface, and output interfaces UA2 interface, UB2 interface, UC2 interface, U02 interface, un2 interface, IA2 interface, IB2 interface, IC2 interface, I02 interface, IN interface are banana sockets.

In some embodiments, as a more specific implementation manner of the voltage conversion module 2 and the current conversion module 3 in the above embodiments, the current conversion module 3 adopts a precision current transformer with the model number TR 0176-4C; the voltage conversion module 2 adopts a precise voltage transformer with the model number of TR 1176-3C.

In some embodiments, based on that FTU equipment is to control the switch of the circuit breaker to be turned on and off, and collect and display the new number of the circuit breaker, the conventional general testing device does not have such a function, for this reason, the inside of the testing tool main body in this embodiment is provided with an on/off signal module, and the on/off signal module includes a first relay 4 and a second relay 5 that are interlocked; the panel 1 is provided with a YXCOM interface, a HW interface, a FW interface, a FZ+ interface, a HZ+ interface, a CN+ interface, a YKCOM interface, a brake-off lamp and a brake-on lamp; the switching-on lamp and a normally open contact of a relay are connected in series between the YXCOM interface and the HW interface; the normally open contact of the switching-off lamp and the other relay is connected in series between the YXCOM interface and the FW interface; when a switching-on signal is input by the remote control end, the first relay 4 acts, the second relay 5 keeps not acting, so that a switching-on signal lamp is turned on, and the switching-on signal is output; when the remote control end inputs the opening signal, the second relay 5 acts, the first relay 4 keeps not acting, the opening signal lamp is lightened, the opening signal is output, and the state of the output signal of the electronic type FTU can be clearly displayed.

In some embodiments, the first relay 4 and the second relay 5 are both double-coil magnetic latching relays, and a trigger type interlocking circuit is formed by using two double-coil magnetic latching relays, when a closing signal is input, a closing indicator light is turned on, a closing signal is output at a remote signaling closing port, and the opening indicator light is kept in an off state; when a brake-off signal is input, the brake-off indicator lamp is turned on, a brake-off signal is output at a remote signaling brake-off port, and the brake-on indicator lamp is kept in a turned-off state; specifically, the double-coil magnetic latching relay adopts a double-coil magnetic latching relay with the model number of HFD2/024-M-L2 (555).

Thus, various embodiments of the present utility model have been described in detail. In order to avoid obscuring the concepts of the utility model, some details known in the art have not been described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.

The above examples only represent some embodiments of the utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. An electronic FTU test fixture, its characterized in that: the testing tool comprises a testing tool main body, wherein four voltage conversion modules and four current conversion modules are arranged in the testing tool main body, a panel is arranged on the outer side of the testing tool main body, and an input end interface and an output end interface are arranged on the panel;

2. The electronic FTU test fixture of claim 1, wherein: the 2IN ends of the four voltage conversion modules are connected with the UGD interface, the 1 IN ends of the four voltage conversion modules are connected with the UA interface, the UB interface, the UC interface and the U0 interface respectively, the 4OUT ends of the four voltage conversion modules are connected with the Un2 interface, and the 6 OUT ends of the four voltage conversion modules are connected with the Ua2 interface, the Ub2 interface, the Uc2 interface and the U02 interface respectively.

3. The electronic FTU test fixture of claim 1, wherein: the 2NC ends of the four current conversion modules are connected with the IGND interface, the 1NC ends of the four current conversion modules are respectively connected with the IA interface, the IB interface, the IC interface and the I0 interface, the 4OUT ends of the four current conversion modules are respectively connected with the IN interface, and the 6 xOUT ends of the four current conversion modules are respectively connected with the Ia2 interface, the Ib2 interface, the IC2 interface and the I02 interface.

4. The electronic FTU test fixture of claim 1, wherein: the input end interfaces and the output end interfaces are banana sockets.

5. The electronic FTU test fixture of claim 1, wherein: the current conversion module adopts a precise current transformer with the model number of TR 0176-4C; the voltage conversion module adopts a precise voltage transformer with the model number of TR 1176-3C.

6. The electronic FTU test fixture of claim 1, wherein: an opening/closing signal module is arranged in the test tool main body, and comprises a first relay and a second relay which are interlocked;

7. The electronic FTU test fixture of claim 6, wherein: the first relay and the second relay are both double-coil magnetic latching relays.

8. The electronic FTU test fixture of claim 7, wherein: the double-coil magnetic latching relay is a double-coil magnetic latching relay with the model of HFD2/024-M-L2 (555).