CN209979747U - Device for checking cable phase sequence under severe communication environment - Google Patents
Device for checking cable phase sequence under severe communication environment Download PDFInfo
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- CN209979747U CN209979747U CN201920568283.8U CN201920568283U CN209979747U CN 209979747 U CN209979747 U CN 209979747U CN 201920568283 U CN201920568283 U CN 201920568283U CN 209979747 U CN209979747 U CN 209979747U
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Abstract
The utility model discloses a device for checking the phase sequence of a cable applied to a severe communication environment, which comprises a first circuit module and a second circuit module, wherein the first circuit module and the second circuit module are respectively connected with the head end and the tail end of a three-phase cable to be checked; the cable phase sequence checking system is simple in principle, simple and understandable in checking procedure, convenient and fast. The trouble of detaching the cable and the grounding wire by the traditional calibration method is saved, and the defect of the traditional calibration method in places with unsmooth communication, such as subway power supply or tunnel mountainous areas, and the like, is overcome. The method is used for carrying out one-time all-line calibration before power transmission, reliable guarantee is provided for later-period opening and operation, the field calibration procedures are few, the efficiency is high, the test cost is low, the practicability is high, and the method is easy to popularize.
Description
Technical Field
The utility model relates to a power transmission field, in particular to be applied to device of check-up cable phase sequence under adverse communication environment.
Background
The cable is used as an important carrier for transmitting electric energy and is more and more widely applied to power supply systems in various industries. In a cable power supply line, due to the fact that a line is long and an intermediate joint and a branch box exist, phase sequences at two ends of the cable are not corresponding easily in the construction process, and electric energy cannot be transmitted correctly. And troubles are brought to the electricity utilization, charging and the like of subordinate users. When longitudinal differential protection is arranged at two ends of a line, protection misoperation, refusal operation and the like can occur. Phase sequence errors are found after power transmission, power failure application is needed for processing, and negative effects are generated on construction enterprises. Therefore, it is an important process to complete the phase sequence verification of the high-voltage cable before power transmission.
The traditional checking method mainly comprises a multimeter method and an insulation megger method. During the universal meter method check-up, need cable A, B both ends respectively to arrange a set of test personnel, unpack cable leading wire and shielding and armor earth connection respectively apart, the short circuit test wire is used with one of them looks leading wire and shielding and armor line short circuit together for B end test personnel, the A end test personnel use universal meter to make and break the shelves and test the break-make condition between leading wire and shielding and the armor line of three-phase respectively, when the universal meter is led to the broken lamp and is lighted or the buzzer rings, explain that this looks is B end short circuit looks. After the phase check is completed, the personnel at the A end inform the personnel at the B end to change the phase through a telephone or an interphone, and the rest phases are checked in sequence. The insulation megger method is similar to the multimeter method, the operation of the personnel at the B terminal is unchanged, the personnel at the A terminal respectively test the insulation condition between the three-phase main conducting wire and the shielding and armor wires by using the insulation megger, and when the insulation resistance value is very low or zero, the phase is a short-circuit phase at the B terminal. This traditional check-up method all needs to demolish shielding and armor earth connection, and work load is big, and voltage is high when insulating megger method is experimental, easily causes the electric shock accident when the operation is improper, and receives communication influence big, A, B both ends personnel can't communicate when communication is not smooth, and the check-up can't go on. With the high-speed development of national economy and the vigorous construction of the power industry, the construction is often performed in mountainous areas, tunnels, subways and other severe communication environments, and the traditional verification method is difficult to realize.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the communication adverse circumstances construction that exists among the prior art under, traditional check-up method will be difficult to the not enough of realization, provides a device of check-up cable phase sequence under being applied to adverse communication environment.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
a device for checking a cable phase sequence applied to a severe communication environment comprises a first circuit module and a second circuit module, wherein the first circuit module and the second circuit module respectively comprise a direct current power supply and a light-emitting element; the first circuit module is used for being connected to one end of a three-phase cable to be detected, and a first wiring end and a second wiring end of the first circuit module are respectively connected with one end of the three-phase cable to be detected; the second circuit module is used for being connected to the other end of the three-phase cable to be detected, and a first wiring end and a second wiring end of the second circuit module are respectively connected with one of the three-phase cables to be detected; if the phase sequence of waiting to examine the three-phase cable is connected to the first wiring end of second circuit module with the phase sequence is unanimous just is connected to the first wiring end of first circuit module the second wiring end of second circuit module connect wait to examine the three-phase cable the phase sequence with the second wiring end of first circuit module is connected wait to examine the three-phase cable phase sequence unanimous, then first circuit module with second circuit module constitutes series circuit, and two the polarity of power is unanimous, can make two light-emitting component all gives out light.
Preferably, the first circuit module and the second circuit module further include a switching element, respectively, and in the first circuit module and the second circuit module, the dc power supply, the light emitting element, and the switching element are sequentially connected in series.
Preferably, the switch element is a push-button switch or a single-pole double-throw switch.
Preferably, the light emitting element is a light bulb or a light emitting diode.
Preferably, the first wiring end and the second wiring end are further connected with a clamp, and the clamp is electrically connected with the three-phase cable to be detected.
Preferably, the dc power voltage of the first circuit module is the same as the dc power voltage of the second circuit module.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a device for checking the phase sequence of a cable applied to a severe communication environment, which comprises a first circuit module and a second circuit module, wherein the first circuit module and the second circuit module are respectively connected with the head end and the tail end of a three-phase cable to be checked; the cable phase sequence checking system is simple in principle, simple and understandable in checking procedure, convenient and fast. The trouble of detaching the cable and the grounding wire by the traditional calibration method is saved, and the defect of the traditional calibration method in places with unsmooth communication, such as subway power supply or tunnel mountainous areas, and the like, is overcome. The method is used for carrying out one-time all-line calibration before power transmission, reliable guarantee is provided for later-period opening and operation, the field calibration procedures are few, the efficiency is high, the test cost is low, the practicability is high, and the method is easy to popularize.
Description of the drawings:
fig. 1 is a schematic diagram of the circuit principle of the present invention.
FIG. 2 is a schematic circuit diagram of a cable miswiring.
Fig. 3 is a schematic diagram of a ring network circuit.
Fig. 4 is a schematic diagram of the wiring of the present invention.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
A device for checking a phase sequence of a cable applied to a severe communication environment comprises a first circuit module and a second circuit module which are respectively connected to the head end and the tail end of a three-phase cable to be detected; the first circuit module and the second circuit module respectively comprise a direct current power supply and a light-emitting element; the first circuit module is used for being connected to one end of a three-phase cable to be detected, and a first wiring end and a second wiring end of the first circuit module are respectively connected with one end of the three-phase cable to be detected; the second circuit module is used for being connected to the other end of the three-phase cable to be detected, and a first wiring end and a second wiring end of the second circuit module are respectively connected with one of the three-phase cables to be detected; if the phase sequence of waiting to examine the three-phase cable is connected to the first wiring end of second circuit module with the phase sequence is unanimous just is connected to the first wiring end of first circuit module the second wiring end of second circuit module connect wait to examine the three-phase cable the phase sequence with the second wiring end of first circuit module is connected wait to examine the three-phase cable phase sequence unanimous, then first circuit module with second circuit module constitutes series circuit, and two the polarity of power is unanimous, can make two light-emitting component all gives out light.
Specifically, as shown in fig. 1 and 2, in the first circuit module, the positive electrode of the dc power supply is connected to one end of the light emitting element, the other end of the light emitting element is connected to a first terminal to which a red test line with a clip is connected, and the negative electrode of the dc power supply is connected to a second terminal to which a black test line with a clip is connected; in the second circuit module, the positive pole of the direct current power supply is connected with one end of the light-emitting element, the other end of the light-emitting element is connected with a second terminal, the second terminal is connected with a black test wire with a clamp, the negative pole of the direct current power supply is connected with a first terminal, and the first terminal is connected with a red test wire with a clamp.
As shown in fig. 1, when the red test wire of the first circuit module is clamped at one end of the first phase cable, the red test wire of the second circuit module is clamped at the other end of the phase cable; the first circuit module black test wire is clamped at one end of the second phase cable, the second circuit module black test wire is clamped at the other end of the phase, and the first light-emitting element and the second light-emitting element emit light simultaneously. The red test line of the first circuit module and the red test line of the second circuit module are not sandwiched at both ends of the same phase, and the black test line of the first circuit module and the black test line of the second circuit module are not sandwiched at both ends of the same phase, as shown in fig. 2, the first light emitting element and the second light emitting element do not emit light.
The first circuit module and the second circuit module respectively comprise a switch element, and in the first circuit module and the second circuit module, the direct current power supply, the light-emitting element and the switch element are sequentially connected in series; the switch element adopts a button switch or a single-pole double-throw switch; the light-emitting element is a bulb or a light-emitting diode; the first wiring end and the second wiring end are also connected with clamps and are electrically connected with the three-phase cable to be detected through the clamps; the voltage value of the direct current power supply of the first circuit module is consistent with that of the direct current power supply of the second circuit module.
Taking a subway power supply system looped network as an example, in order to improve the power supply reliability, the subway power supply system is connected in a ring shape by four or more substations to form looped network power supply, and the schematic diagram of single-path connection is shown in fig. 3. Wherein A1/A2 is a main station, B1/B2 is a traction voltage-reduction hybrid substation, and C1 is a voltage-reduction substation. Before the power supply system supplies power, the communication system cannot run without a stable power supply, and the communication with a station cannot be carried out by using a mobile phone or an interphone, so that the traditional verification method is difficult to realize. Therefore, the device can be used for cable phase sequence checking.
The light-emitting element adopts a bulb, the bulb is checked in an A-B-C sequence, firstly, after a red test wire clamp A phase, a black test wire clamp B phase and A, B phase are checked to be correct, a B-end person enables the bulb to continuously flash for 3 times by switching on and off a switch of a second circuit module to prompt the A-end person that the phase check is finished, and after the A-end person receives a signal, the bulb continuously flashes for 3 times by switching on and off a switch of a first circuit module to reply the B-end person that the next phase check is carried out. And then the black test wire clamp is changed from the B phase to the C phase, the A phase red test wire clamp is not moved, and C phase verification is carried out. And after the interval cable is completely verified according to the appointed sequence, the B-end tester is not moved, and the A-end tester is switched to the next transformer substation to verify the next interval cable. Taking the verification of the ring network cable between the A1 station and the B1 station as an example, the high-voltage cable is connected with the switch cabinet through the plug head, so that the high-voltage cable is quite troublesome to disassemble and assemble, and the high-voltage cable can be selected to be connected with a transformer used by a substation during testing. The three phases of the transformer are connected together through the windings, each phase of winding is provided with a gear connecting sheet, and when the gear connecting sheets are removed, the three phases are disconnected, so that the three phases can be distinguished without detaching a connecting bolt of a cable and the transformer, and the cable connecting bolt is prevented from being damaged. The phase sequence of the cable from the transformer to the switch cabinet is correct. In specific implementation, the method comprises the following steps:
step one, switching on the feeder circuit breakers of the transformers at the A1 and the B1, simultaneously switching on the ring network circuit breakers between the A1 and the B1, and switching off other unrelated circuit breakers, so that the cable penetrates from the transformer at the A1 to the transformer at the B1 and is independent of other loops.
And step two, the tester of the A1 closes the switch of the first circuit module on the A-phase cable at the red test wire clamp transformer and the B-phase cable at the black test wire clamp transformer, and at the moment, because the A, B two phases are in an open-circuit state, the first light-emitting element is not bright, and waits for observing the display state of the first light-emitting element. A tester B1 switches on the switch of the second circuit module at the A phase of the red test wire clamp transformer and the B phase of the black test wire clamp transformer of the second circuit module, and the test wiring schematic diagram is shown in FIG. 4.
Step three, when the A, B phase cable of the B1 corresponds to the A, B phase cable of the a1 phase, the first light-emitting element and the second light-emitting element form a lighting loop of the lamp of fig. 1, and the first light-emitting element and the second light-emitting element are simultaneously lighted. When the cable A, B phase of B1 does not correspond to the cable A, B phase of a1 or one of the phases is C phase, the first and second light-emitting elements form a circuit of the fig. 2 lamp, which is not lit, or other open circuit condition, and the first and second light-emitting elements are not lit. The tester B1 only needs to clamp the red and black test lines of the device between A, B, C three phases to make reverse connection until the second light-emitting element is on, at this time, the red test line clamp is corresponding to phase A, the black test line clamp is phase B, and the rest phase is phase C.
And step four, after the A, B-phase cable is verified, the tester B1 continuously switches off the switch of the second circuit module for 3 times, and at the moment, the first light-emitting element and the first light-emitting element flicker for 3 times at the same time so as to inform the tester A1 that the phase verification is completed. After receiving the flicker signal, the tester at a1 turns off the switch of the first circuit module 3 times continuously to reply that the tester at B1 will perform the next phase cable check. The tester A1 puts the first circuit module black test clip in phase C, and the tester B1 puts the second circuit module black test clip in phase C, and the red test clip is unchanged, and the first light-emitting element should be lighted at the same time. At this time, the phase sequence of the three-phase cable is verified.
And step five, after the three-phase cables are verified according to the appointed sequence, the tester A1 separates the circuit breakers and connects the transformer gear connecting sheet to recover to the state before the test. The experimenter at A1 then switched to C1. Meanwhile, the tester in the B1 waits for checking the cable between the B1 and the C1 in the A phase and the B phase of the transformer in the black test wire clamp. By parity of reasoning, checking is carried out section by section to ensure that the phase sequence of each section cable of the whole line is correct.
And step six, if the tester does not light the light-emitting element no matter how the tester reversely connects, the tester can short-circuit the red and black test lines to eliminate the fault of the device and then search the open circuit point in the middle of the cable.
Claims (6)
1. The device for checking the phase sequence of the cable applied to the severe communication environment is characterized by comprising a first circuit module and a second circuit module, wherein the first circuit module and the second circuit module respectively comprise a direct current power supply and a light-emitting element; the first circuit module is used for being connected to one end of a three-phase cable to be detected, and a first wiring end and a second wiring end of the first circuit module are respectively connected with one end of the three-phase cable to be detected; the second circuit module is used for being connected to the other end of the three-phase cable to be detected, and a first wiring end and a second wiring end of the second circuit module are respectively connected with one of the three-phase cables to be detected; if the phase sequence of waiting to examine the three-phase cable is connected to the first wiring end of second circuit module with the phase sequence is unanimous just is connected to the first wiring end of first circuit module the second wiring end of second circuit module connect wait to examine the three-phase cable the phase sequence with the second wiring end of first circuit module is connected wait to examine the three-phase cable phase sequence unanimous, then first circuit module with second circuit module constitutes series circuit, and two the polarity of power is unanimous, can make two light-emitting component all gives out light.
2. The apparatus of claim 1, wherein the first circuit module and the second circuit module further comprise a switching element, and the dc power source, the light emitting element and the switching element are sequentially connected in series in the first circuit module and the second circuit module.
3. The apparatus for checking phase sequence of cable in harsh communication environment according to claim 2, wherein said switch element is a push-button switch or a single-pole double-throw switch.
4. The apparatus for checking phase sequence of cable in harsh communication environment as claimed in claim 1, wherein said light emitting element is a light bulb or a light emitting diode.
5. The apparatus for verifying phase sequence of cable in harsh communication environment as claimed in claim 1, wherein said first terminal and said second terminal are further connected to a clamp, and are electrically connected to said three-phase cable to be tested through said clamp.
6. The apparatus for verifying phase sequence of cable applied in harsh communication environment as claimed in claim 1, wherein the dc power voltage value of said first circuit module is identical to the dc power voltage value of said second circuit module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920568283.8U CN209979747U (en) | 2019-04-24 | 2019-04-24 | Device for checking cable phase sequence under severe communication environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920568283.8U CN209979747U (en) | 2019-04-24 | 2019-04-24 | Device for checking cable phase sequence under severe communication environment |
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| CN209979747U true CN209979747U (en) | 2020-01-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485548A (en) * | 2020-11-23 | 2021-03-12 | 国网北京市电力公司 | Testing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485548A (en) * | 2020-11-23 | 2021-03-12 | 国网北京市电力公司 | Testing device |
| CN112485548B (en) * | 2020-11-23 | 2023-03-14 | 国网北京市电力公司 | Testing device of HPLC module |
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