CN204347181U - Substation secondary cable proofreader lamp device - Google Patents

Abstract

The substation secondary cable alignment light device includes a first alignment unit and a second alignment unit. The first alignment unit A includes a first battery pack L1, the positive pole of the first battery pack L1 is connected to one end of the first light bulb, and the first light bulb The other end is connected to the first red clip A1, and the negative electrode of the first battery pack L1 is connected to the first black clip B1. The second line unit includes a second battery pack L2, the negative pole of the second battery pack L2 is connected to one end of the second light bulb, the other end of the second light bulb is connected to the second red clip A2, and the positive pole of the second battery pack L2 is connected to the second black clip B2. The utility model relates to a secondary cable alignment lamp device of a substation, which has a simple structure and is easy to implement. Through the cooperation between the two alignment units, the alignment becomes more intuitive, and the two operators can also communicate through the flashing of the alignment lights in their hands. Using the wire alignment device can avoid a large number of wire removal, greatly reduce the workload of wire alignment, and save manpower, material resources and time.

Description

Substation secondary cable alignment light device

technical field

The utility model relates to a substation secondary cable alignment lamp device, which relates to the field of substation relay protection.

Background technique

In the construction of the power system, the substation is an indispensable transfer station for power transmission, and whether the relay protection equipment in the substation can operate accurately and reliably is directly related to the safe and reliable operation of the substation. In this regard, whether the wiring of the voltage transformer, the secondary terminal of the current transformer and the secondary circuit of the relay protection device in the substation is correct is directly related to the safe, reliable and stable operation of the substation. Therefore, in the commissioning of the substation project, it is necessary to check the cores at both ends of the cable and the secondary wiring to ensure that the cores at both ends correspond accurately and the polarity of the connection with the secondary terminal of the transformer is correct. The current cable inspection process is very cumbersome. Generally, one person stands at both ends of the cable. Using the principle of measuring resistance with a multimeter, one person grounds one end of one core of the cable, and the other person stands at the other end of the cable. Use one test head of the multimeter to ground, and the other test head to test each core in the cable one by one, until the multimeter beeps, it can be determined that it is the two ends of a core, and then repeat until the two ends of all cores are connected. Until all are sorted and labeled, the work process is cumbersome, time-consuming and error-prone, which brings a lot of inconvenience to the work. At the same time, this also brings many unreliable factors to the correctness of the secondary circuit wiring. For this situation, there are currently two improvement schemes. One is to connect the cable cores at one end of the cable to a terminal block respectively, and then touch the cores at the other end of the cable to the corresponding terminal block at the other end one by one. Then the indicator light is on. Although it can be completed by one person, the wiring is cumbersome and needs to be tested one by one. It takes a long time and the efficiency of checking the line is still relatively low. Another solution is to use a battery pack, lead out the test terminals between the batteries and mark them, connect one end of the cable to the terminal block with the lead-out end of the battery pack, and use a voltmeter to measure the voltage at the other end of the cable. It is theoretically feasible, but it is still very cumbersome to debug the connected secondary line, and it is still very cumbersome to remove and connect a large number of lines. In addition, considering the measurement error of the multimeter, it is easy to misjudge the line.

There are still many deficiencies in the existing mature line checking technology and corresponding improvement measures. The main manifestations are: first, when doing alignment debugging, a lot of wire removal and wiring are required, which is cumbersome and time-consuming; second, for the ground wire and the secondary wire connected to the same winding of the transformer, it is easy to check the wire Misjudgment and mistakes; third, for the improvement scheme, the design and structure of the device are complicated, and it is inconvenient to carry and operate.

Contents of the invention

In order to solve the above technical problems, the utility model provides a substation secondary cable alignment light device, which has a simple structure and is easy to implement. Through the cooperation between the two alignment lights, the alignment becomes more intuitive, and the two operators can also communicate through the flashing lights of the alignment lights in their hands. Using the wire alignment device can avoid a large number of wire removal, greatly reduce the workload of wire alignment, and save manpower, material resources and time.

The technical scheme that the utility model takes is:

The substation secondary cable alignment light device includes a first alignment unit and a second alignment unit. The first alignment unit A includes a first battery pack L1, the positive pole of the first battery pack L1 is connected to one end of the first light bulb, and the first light bulb The other end is connected to the first red clip A1, and the negative electrode of the first battery pack L1 is connected to the first black clip B1. The second line unit includes a second battery pack L2, the negative pole of the second battery pack L2 is connected to one end of the second light bulb, the other end of the second light bulb is connected to the second red clip A2, and the positive pole of the second battery pack L2 is connected to the second black clip B2.

The first red clip A1 is connected to one end of the cable core, and the other end of the cable core is in contact with the second red clip A2.

There are two cable cores, including a first cable core and a second cable core. The first cable core and the second cable core are respectively connected to two terminals of the secondary winding of the current transformer.

The first black clip B1 and the second black clip B2 are connected to the ground wire GND.

The utility model relates to a secondary cable alignment lamp device of a substation, which changes the conventional multimeter resistance alignment method. The device consists of two pairs of battery packs and a light bulb each to form a wiring unit, and the two pairs of wiring units form a series relationship during the wiring process.

When wiring, the red clip of the first pair of line units clamps one end of the cable core to be tested, the black clip of the first wiring unit is connected to the ground grid (that is, grounding), and the red clip of the second pair of line units is clamped on the cable to be tested. At the other end of the wire core, the black clip of the second wiring unit is also connected to the ground grid (that is, grounded). When the same cable core is tested, the bulbs on the two wiring units will light up.

When using the device for alignment debugging, two people are needed. If the cable is longer, two walkie-talkies need to be equipped. The structure of the device is simple.

When in use, two people stand at both ends of the cable core to be tested, usually one person stands at the HSBC cabinet (the secondary lines are collected in a cabinet with many terminal blocks inside), and the other person stands at the transformer At the secondary terminal or the protection cabinet (the secondary line is transferred to the relay protection cabinet after passing through the HSBC cabinet), generally both ends of the core in a cable have been connected to the corresponding terminals of the corresponding equipment Above all, for the personnel who do the debugging and verification, it is to check whether the electrical installer has correctly connected the different wire cores in a cable with the terminals on the corresponding equipment. Here, not only the alignment is required, but also whether the wiring is correct . For example, there are two wire cores in a cable connected to the two ends of the same secondary winding of the current transformer. The secondary winding of the current transformer is a copper wire wrapped around the iron core, and the resistance value is very small. Conventional multimeters cannot check whether the polarity of the secondary wiring of the transformer is correct.

Two workers, one person takes a wire alignment unit, when the two wire alignment units are connected to the same wire core, the two lights will be on at the same time, when one of them touches the wire core with the test head, the other end’s Testers can see their light bulbs blinking. If the light bulb of the other party is always on or off when touched, it means that the wire core itself has been grounded or the two testers are not holding the same wire core.

The utility model is a substation secondary cable alignment lamp device, which has a simple structure and is easy to implement. Through the cooperation between the two alignment units, the alignment becomes more intuitive, and the two operators can also communicate through the flashing of the alignment lights in their hands. Using the wire alignment device can avoid a large number of wire removal, greatly reduce the workload of wire alignment, and save manpower, material resources and time.

Description of drawings

Fig. 1 is a connection schematic diagram of embodiment 1 of the device of the present invention.

Fig. 2 is a connection schematic diagram of embodiment 2 of the device of the present invention.

Detailed ways

Example 1:

As shown in Figure 1, the substation secondary cable alignment lamp device includes a first alignment unit A and a second alignment unit B, the first alignment unit A includes a first battery pack L1, and the positive pole of the first battery pack L1 is connected to One end of the first light bulb 1 and the other end of the first light bulb 1 are connected to the first red clip A1, and the negative electrode of the first battery pack L1 is connected to the first black clip B1. The second line unit B includes a second battery pack L2, the negative pole of the second battery pack L2 is connected to one end of the second light bulb 2, the other end of the second light bulb 2 is connected to the second red clip A2, and the positive pole of the second battery pack L2 is connected to the second black clip B2.

In Figure 1, the first line alignment unit A and the second line alignment unit B constitute a complete line alignment light device, which is operated by two people during the actual line alignment, one person takes one line alignment unit, for example, operator A takes the first Line unit A, then operator B takes the second line unit B. The light bulb and the red clip are fixed together. The first black clip B1 and the second black clip B2 are clipped on the ground wire when aligning. Generally, the equipment casing and support columns in the substation are connected to the ground grid of the substation, that is, both can as ground.

When debugging and wiring, the wire core in the general cable has been connected to the secondary terminal of the station-use primary equipment. In order to improve the wiring efficiency, try to avoid disconnecting the wiring. Take the secondary terminal wiring of a current transformer as an example. Under normal circumstances, multiple wire cores in one end of the cable are connected to the secondary winding terminals of the current transformer, and the other end is connected to the terminal block of the control cabinet (terminal There is a short connecting piece between the inlet and outlet of the terminal block. When debugging, open the short connecting piece to disconnect the connection between the incoming line and the outgoing line on the terminal block), and then lead out the connection from the terminal block of the control cabinet. Arrival in a protective cabinet. For this connection process, it is necessary to check whether the secondary wiring is correct during debugging. At this time, an operator holds the first pair of line units A and stays at the control cabinet, and clamps the first black clip B1 on the equipment shell or the pillar connected to the ground grid, and the first red clip A1 on the cable to be tested on core 3. Another operator holds the second pair of wire unit B and stays at the terminal of the secondary winding of the current transformer, and also clamps the second black clip B2 on the equipment shell or support column, and uses the second red clip A2 to test the cable When the light is on, touch the selected core three times, if the corresponding light flashes three times, it means that the two operators have selected the same core. At this time, the other operator also touches the cable core 3 times with the first red clip A1 to express a response and complete the line alignment. In the case of tacit cooperation, the use of communication devices such as walkie-talkies can be reduced. In the actual commissioning, the wires connected to the terminal block of the HSBC cabinet and the wires connected to the secondary terminals of the current transformer have labels and number tubes. If the wiring is correct, the labels at both ends of the same wire core should be the same. Yes, and in the cable design, each core in the same cable is also numbered. In the actual wiring, we should make full use of this information to narrow the range of wiring and reduce the workload of blind wiring.

Example 2:

As shown in Figure 2, the substation secondary cable alignment lamp device includes a first alignment unit A and a second alignment unit B, the first alignment unit A includes a first battery pack L1, and the positive pole of the first battery pack L1 is connected to One end of the first light bulb 1 and the other end of the first light bulb 1 are connected to the first red clip A1, and the negative electrode of the first battery pack L1 is connected to the first black clip B1. The second line unit B includes a second battery pack L2, the negative pole of the second battery pack L2 is connected to one end of the second light bulb 2, the other end of the second light bulb 2 is connected to the second red clip A2, and the positive pole of the second battery pack L2 is connected to the second black clip B2. The cable includes a first cable core 3-1 and a second cable core 3-2, and the first cable core 3-1 and the second cable core 3-2 are respectively connected to the secondary winding of the current transformer. Two terminals: M terminal and N terminal.

There are many secondary windings in the current transformer, these secondary windings are independent of each other, each winding is equivalent to a small inductance when alternating current is passed through, and is equivalent to a small resistance when direct current is passed through. When the power signal is taken from both ends of the winding, the two ends of the winding are divided into positive and negative polarities. One-to-one correspondence, no crossover. When aligning the wires, since the wires are not removed, when the operator touches the red clips to both ends of the winding, the alignment lights will be on, but the brightness will be different. Because in order to improve work efficiency during actual alignment, generally try not to remove the wires, unless it is found that there is an error in the installation of the secondary wiring, it will be removed for correction and re-wiring.

In Figure 2, both the first black clip B1 and the second black clip B2 are connected to the equipment shell (that is, grounded), the first red clip A1 is clipped on the first cable core 3-1 to be paired, and P/K is the current The primary end of the transformer is connected to the primary circuit of the substation. M/N is the secondary winding of the current transformer. When the second red clip A2 is clamped on the M terminal, the bulb is normally on, and when it is clamped on the N terminal , the brightness of the bulb will be darker, so it can be judged that: the other end of the first cable core 3-1 is connected to the M terminal of the current transformer. When the winding resistance value between M/N is very small, and the second red clip A2 clamps the light bulb at the M terminal and the N terminal, the brightness of the light bulb is the same, then it is necessary to connect the first cable core 3-1 and the second cable core 3-2 Disassemble from the M/N terminal, and then perform an alignment test. The subsequent process is the same as the alignment process in Figure 1. In the specific alignment debugging, refer to the secondary electrical wiring diagram of the substation to ensure the integrity of the wiring. correctness.

Claims (4)

1. substation secondary cable proofreader lamp device, comprise first pair of line unit (A), second pair of line unit (B), it is characterized in that, first pair of line unit (A) comprises the first electric battery (L1), first electric battery (L1) positive pole connects the first bulb (1) one end, first bulb (1) other end connects the first red clip (A1), and the first electric battery (L1) negative pole connects the first black clip (B1); Second pair of line unit (B) comprises the second electric battery (L2), second electric battery (L2) negative pole connects the second bulb (2) one end, second bulb (2) other end connects the second red clip (A2), and the second electric battery (L2) positive pole connects the second black clip (B2).

2. substation secondary cable proofreader lamp device according to claim 1, is characterized in that, one end in described first red clip (A1) stube cable core (3), cable core (3) other end contacts with the second red clip (A2).

3. substation secondary cable proofreader lamp device according to claim 2, it is characterized in that, described cable core (3) comprises the first cable core (3-1), the second cable core (3-2), and the first cable core (3-1), the second cable core (3-2) connect two terminals of the Secondary Winding of current transformer respectively.

4. substation secondary cable proofreader lamp device according to claim 1, it is characterized in that, described first black clip (B1), the second black clip (B2) connect ground wire (GND).