CN211627693U - Portable automatic phase sequence detection device - Google Patents
Portable automatic phase sequence detection device Download PDFInfo
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- CN211627693U CN211627693U CN201922132537.4U CN201922132537U CN211627693U CN 211627693 U CN211627693 U CN 211627693U CN 201922132537 U CN201922132537 U CN 201922132537U CN 211627693 U CN211627693 U CN 211627693U
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Abstract
The utility model discloses a portable automatic phase sequence detection device relates to power device technical field. The automatic phase sequence detection system in the phase sequence detection device comprises a phase sequence detection switch, a first power supply control relay, a second power supply control relay, a third power supply control relay, a fourth power supply control relay, a first relay, a phase sequence identical indicator light and a phase sequence different indicator light. The device firstly adopts the power supply control relay to detect the phase sequence categories of the three-phase power supplies of the transformers of different lines or different groups, and then compares the phase sequence categories by the reverse connection mode of the power supply control relay, so that whether the phase sequences of any low-voltage power supplies are the same or not can be reliably detected; the problems of limitation of the application range and low reliability of an automatic phase-checking device in the prior art are solved, the problems of low safety and complex operation of manual detection of a phase sequence are solved, and the safe and rapid power supply of emergency equipment is guaranteed.
Description
Technical Field
The utility model relates to an electric power unit, concretely relates to portable automatic phase sequence detection device.
Background
Along with the development of economy, people have higher and higher requirements on power utilization reliability, and working conditions of temporary power taking and power supply are more and more common for ensuring that a user does not stop power, and emergent power protection and power transmission are realized. The power utilization requirements of users are guaranteed by using emergency equipment to supply power or take power, and common emergency equipment is provided with a power generation car, a UPS power supply car, a mobile box transformer substation car, a low-voltage cable car and the like.
At present, emergency equipment generally adopts a self-contained cable to be directly connected to a low-voltage power grid interface for power supply, and because phase sequence detection is not carried out before power supply, the situation that the phase sequence of an output power supply is inconsistent with the phase sequence of a power supply of a user power grid often occurs, so that the situation that three-phase equipment (such as an elevator, a lathe and the like) of a user cannot be used or works reversely is caused, even accidents can be caused, and personal safety is damaged.
In order to avoid the situation that the sequence is inconsistent when the emergency equipment supplies power, the phase sequence must be detected before the power supply. The existing phase sequence detection methods have two types: one is to use a phase sequence meter to carry out manual detection, and the other is to arrange an automatic phase checking device for emergency equipment.
The first mode is as follows: the method has the advantages that the method can be carried out by adopting the phase sequence meter, the investment is less, the applicability is stronger, however, the mode needs an operator to hold the phase sequence meter to contact with a 400V power supply, the personal safety of the operator cannot be guaranteed, the operation steps are complex, the reliability is not high, and the consequences caused by manual judgment once the fault occurs are serious.
The second mode is as follows: an automatic phase checking device is generally installed in a vehicle, and automatic phase checking is generally realized by a generalized bridge which is simply mounted or by directly installing a phase checking instrument. The bypass mobile box type transformer substation breakdown van low-voltage phase checking system disclosed in the Chinese patent CN204330898U adopts the current balance principle to carry a generalized bridge in the technical description to realize the low-voltage phase checking system, the system can judge the phase condition by adjusting an adjustable resistor on site to observe the current value, can be used for detecting whether the phases of three-phase power supplies of transformers in the same group in the same line are the same or not, but cannot detect whether the phase sequences of the three-phase power supplies of the transformers in different lines or different groups are the same or not, has large use limitation, and is not suitable for detecting the phase sequences of emergency equipment and a low-voltage power grid. Moreover, the operation is complicated, and the reliability of the result is not high. In addition, in the mobile box-type substation vehicle with the automatic phase checking system disclosed in chinese patent CN201937193U, the low-voltage power supply and the power supply of the distribution transformer are directly connected to the phase meter, and the phase meter determines the phase, so that the automatic phase checking and automatic switching of the mobile box-type substation vehicle are realized, and the field manual phase checking operation and switching operation are avoided. However, the phase meter can only detect the phase angle, that is, the phase checking method can only be used for judging whether the three-phase power supply phases of the same group of transformers in the same line are the same, the phase sequence of the three-phase power supply of different lines or different groups of transformers cannot be judged, and the phase sequence detection of emergency equipment and a low-voltage power grid is not applicable.
In addition, the interface form of the low-voltage power grid is various, and a low-voltage switch cabinet busbar, an overhead line, various different types of quick connectors and the like are common. However, emergency equipment is generally only provided with a cable in an interface form, and the cable can only meet the interface requirements of a few low-voltage power grids, so that the situation that emergency equipment cannot be accessed frequently occurs. To this kind of condition, current solution carries out the on-the-spot remanufacturing for taking the cable certainly to emergency equipment, not only wastes time and energy, but also can cause destruction, waste to taking the cable certainly. If a plurality of cable interfaces are configured, a large number of cables need to be configured, which causes repeated purchase of the cables and wastes a large amount of economic resources. The above problems severely restrict the development of emergency equipment, and simultaneously, have great influence on the improvement of the power utilization reliability.
Therefore, no known technology is available for solving the problems of automatic phase sequence detection of emergency equipment and quick access to a low-voltage distribution network.
SUMMERY OF THE UTILITY MODEL
To above problem, the utility model discloses a portable automatic phase sequence device that examines, the device at first adopt the phase sequence classification of the three phase current of power control relay detection different circuit or different group transformer, and rethread power control relay looks inverting connection mode compares last phase sequence classification, can detect out the phase sequence whether the same of arbitrary low voltage power reliably. The problems of limitation of the application range and low reliability of an automatic phase-checking device in the prior art are solved, the problems of low safety and complex operation of manual detection of a phase sequence are solved, and the safe and rapid power supply of emergency equipment is guaranteed.
The utility model provides a portable automatic phase sequence detection device, including box, circuit breaker, cable interface, divide-shut brake switch and automatic phase sequence detection system, the automatic phase sequence detection system is including examining phase sequence switch, first relay, the same pilot lamp of phase sequence, the different pilot lamps of phase sequence and two sets of power control relays; the two groups of power supply control relays are respectively connected to the input end and the output end of the circuit breaker, and the phase sequence of the two groups of power supply control relays is opposite to that of the two groups of power supply control relays connected with the input end and the output end of the circuit breaker; one group of normally open contacts of the two power supply control relays in the same group are connected in series, the two groups of power supply control relays are connected in parallel after being connected in series, and a coil of the first relay is connected with the other ends of the normally open contacts of the two groups of power supply control relays connected in series respectively; the first relay comprises two groups of normally open contacts and a group of normally closed contacts, one group of normally open contacts are connected with the indicating lamps with the same phase sequence, the other group of normally closed contacts are connected with the opening and closing switch in series, and one group of normally closed contacts are connected with the indicating lamps with different phase sequences.
Preferably, the two groups of and four power control relays are respectively a first power control relay, a second power control relay, a third power control relay and a fourth power control relay; the power supply A phase, the power supply B phase and the power supply C phase of the first power supply control relay are connected with the power supply A phase, the power supply B phase and the power supply C phase of the breaker input end, the power supply B phase and the power supply C phase of the second power supply control relay are connected with the power supply C phase, the power supply B phase and the power supply C phase of the third power supply control relay are connected with the power supply A phase, the power supply B phase and the power supply C phase of the third power supply control relay, and the power supply A phase, the power supply B phase and the power supply C phase of the fourth power supply control relay are connected with the power supply C.
Preferably, the circuit breaker comprises a circuit breaker body, a circuit breaker closing mechanism and a circuit breaker opening mechanism, and the opening and closing switch is connected with the circuit breaker closing mechanism and the circuit breaker opening mechanism respectively. The cable interfaces are arranged on two sides of the box body and comprise input cable interfaces and output cable interfaces, and the input cable interfaces comprise input N-phase interfaces and input A-phase interfaces, input B-phase interfaces and input C-phase interfaces which are respectively connected with A-phase, B-phase and C-phase terminals at the input end of the circuit breaker; the output cable interface comprises an output N-phase interface, an output A-phase interface, an output B-phase interface and an output C-phase interface, wherein the output A-phase interface, the output B-phase interface and the output C-phase interface are respectively connected with the A-phase, B-phase and C-phase terminals of the output end of the circuit breaker, and the input N-phase interface is connected with the output N-phase interface.
Preferably, the input cable interface is a quick connector or a copper bar, and the output cable interface is a quick connector; the cable interface is connected with the circuit breaker by a cable or a copper bar.
Preferably, the output cable interface is connected with a transfer cable, one end of the transfer cable is a quick connector connected with the output cable interface, and the other end of the transfer cable is provided with a plurality of interface forms which can be matched with various interfaces of the low-voltage distribution network.
Preferably, the interface configured at one end of the adapter cable connected with the low-voltage distribution network is in the form of a copper terminal or a quick connector or a drainage wire clamp.
Preferably, the device further comprises a voltage and current display device, wherein the voltage and current display device comprises a current signal detection device arranged on a cable or a copper bar connected with the cable interface and the circuit breaker and a multifunctional electric power meter for displaying voltage, current, power and frequency.
Preferably, the device further comprises a quasi-synchronous controller for comparing the voltage amplitude and the phase angle.
Preferably, the device is still including testing the electric mouth, test the electric mouth and test the electric mouth including input test the electric mouth and output, the input is tested the electric mouth and is connected with the circuit breaker input, and the output is tested the electric mouth and is connected with the circuit breaker output, it has insulating protection and protection against electric shock structure to test the electric mouth.
Preferably, the box includes box body, handle, possesses lock and the universal wheel of fingerprint identification function, the box body is double-deck door structure.
Compared with the prior art, the utility model discloses a portable automatic phase sequence device's advantage is:
(1) the utility model discloses at first adopt power control relay to detect the phase sequence classification of the three phase current of different circuits or different group transformer, rethread power control relay looks inverting connection mode compares last phase sequence classification, can detect out the phase sequence whether the arbitrary low voltage power supply is the same reliably. The problems that in the prior art, an automatic phase checking device can only detect whether the three-phase power supply phases of transformers in the same group are the same or not and the reliability is solved, the problems of low safety and complex operation of manual phase sequence detection are solved, and the safety and the rapid power supply of emergency equipment are guaranteed.
(2) The utility model discloses set up cable interface and adapter cable, emergent equipment adopts self cable can make things convenient for, insert the low voltage electric network fast, has solved emergent equipment cable site transformation and the repeated problem of purchasing the cable and making of cable, practices thrift a large amount of manpowers, material resources.
(3) The utility model discloses automatic examine three-phase power supply controller among phase sequence system and have open-phase protection, under-voltage protection function, only can export the unanimous signal of phase sequence when input and output two way power are normal totally and the phase sequence is unanimous, not only guaranteed the accuracy of phase sequence testing result, also guaranteed the reliability of emergent equipment power simultaneously.
Drawings
For a clear explanation of the embodiments or prior art solutions of the present invention, the drawings that are needed in the description of the embodiments or prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for a person skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram 1 of a portable automatic phase sequence detection device disclosed in the present invention.
Fig. 2 is the utility model discloses a structural schematic diagram 2 of a portable automatic phase sequence detection device.
Fig. 3 is a schematic circuit diagram of a portable automatic phase sequence detection device disclosed in the present invention.
Fig. 4 is a logic block diagram of a portable automatic phase sequence detection device disclosed in the present invention.
The part names represented by the numbers or letters in the drawings are:
1-a box body; 101-universal wheels; 102-a tank body; 103-door lock; 104-a handle; 2-a circuit breaker; 201-a circuit breaker body; 202-a circuit breaker closing mechanism; 203-breaker opening mechanism; 3-automatic phase sequence detection system; 301-a first relay; 302-a first power control relay; 303-a second power control relay; 304-a third power control relay; 305-a fourth power control relay; 306-phase sequence detection switch; 307-phase sequence same indicator light; 308-different indicator lights of phase sequence; 309-quasi-synchronous controller; 4-a cable interface; 401 — input a phase interface; 402-input phase B interface; 403-input phase C interface; 404-input N-phase interface; 405-output phase a interface; 406-output phase B interface; 407-output phase C interface; 408-output N-phase interface; 5, opening and closing a switch; 6-voltage current display device; 601-multifunctional electric power meter; 602-current signal detection means; 7-electroscopic port; 8-patch cable.
Detailed Description
The following description briefly describes embodiments of the present invention with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.
Fig. 1-4 show preferred embodiments of the invention, which have been dissected in detail from different perspectives, respectively.
As shown in fig. 1 and 2, the portable automatic phase sequence detection device includes a box 1, a circuit breaker 2, a cable interface 4, a switch 5 and an automatic phase sequence detection system 3.
The circuit breaker 2 is installed in the box 1, and includes circuit breaker body 201, circuit breaker closing mechanism 202, circuit breaker separating brake mechanism 203, and the divide-shut brake switch 5 is connected with circuit breaker closing mechanism 202 and circuit breaker separating brake mechanism 203 respectively.
The cable interfaces 4 are installed on two sides of the box body 1, have insulation protection and comprise input cable interfaces and output cable interfaces, wherein each input cable interface comprises an input N-phase interface 404, an input A-phase interface 401, an input B-phase interface 402 and an input C-phase interface 403 which are respectively connected with input A-phase, B-phase and C-phase terminals of the circuit breaker 2. The output cable interface includes an output N-phase interface 408, an output a-phase interface 405, an output B-phase interface 406, and an output C-phase interface 407, which are connected to the output terminals a, B, and C of the circuit breaker 2, respectively, and the input N-phase interface 404 is connected to the output N-phase interface 408. Specifically, the input cable interface is a quick connector or a copper bar, and the output cable interface is a quick connector. The cable interface 4 is connected with the circuit breaker 2 by a cable or a copper bar. The output cable interface is connected with a transfer cable 8, one end of the transfer cable 8 is a quick connector connected with the output cable interface, the other end of the transfer cable is provided with a plurality of interface forms which can be matched with various interfaces of the low-voltage distribution network, and the specific interface form is a copper terminal or a quick connector or a drainage wire clamp.
As shown in fig. 3, the automatic phase sequence detection system 3 includes a phase sequence detection switch 306, a first power supply control relay 302, a second power supply control relay 303, a third power supply control relay 304, a fourth power supply control relay 305, a first relay 301, a phase sequence identical indicator lamp 307, and a phase sequence different indicator lamp 308. The power A phase, the power B phase and the power C phase of the first power control relay 302 are respectively connected with the power A phase, the power B phase and the power C phase of the input end of the circuit breaker 2; the power A phase, the power B phase and the power C phase of the second power control relay 303 are respectively connected with the power C phase, the power B phase and the power A phase of the input end of the circuit breaker 2; the power A phase, the power B phase and the power C phase of the third power control relay 304 are respectively connected with the power A phase, the power B phase and the power C phase of the output end of the circuit breaker 2; the power supply a phase, B phase, and C phase of the fourth power supply control relay 305 are connected to the output terminal C phase, B phase, and a of the circuit breaker 2, respectively. A set of normally open contact of first power control relay 302 is established ties with a set of normally open contact of third power control relay 304, a set of normally open contact of second power control relay 303 is established ties with a set of normally open contact of fourth power control relay 304, and two sets of power control relays are established ties the back and wholly connect in parallel, and first relay 301's coil is connected with the other end of the normally open contact of third power control relay 304 and the other end of the normally open point of fourth power control relay 305 respectively. The first relay 301 includes two sets of normally open contacts and one set of normally closed contacts, one set of normally open contacts is connected with the same phase sequence indicator lamp 307, the other set is connected in series with the opening and closing switch 5, and one set of normally closed contacts is connected with the different phase sequence indicator lamp 308.
Further, the device also comprises a voltage and current display device 6, wherein the voltage and current display device 6 comprises a current signal detection device 602 arranged on a cable or a copper bar connected with the cable interface 4 and the circuit breaker 2, and an electric power multifunctional meter 601 for displaying voltage, current, power and frequency.
Further, the device also comprises a quasi-synchronous controller 309 used for comparing the voltage amplitude and the phase angle, conditions are provided for the parallel operation of the mobile box transformer car and the low-voltage cable distribution car and a user, and the power supply reliability is greatly improved.
Further, the device is still including testing electric mouth 7, tests electric mouth 7 and tests electric mouth including input test electric mouth and output, and the input is tested electric mouth and is connected with 2 input ends of circuit breaker, and the output is tested electric mouth and is connected with 2 output ends of circuit breaker, tests electric mouth 7 and has insulation protection and protection against electric shock structure.
As shown in fig. 4, the portable automatic phase sequence detection device for operation includes the following steps:
(1) the emergency equipment is connected with the input cable interface of the portable automatic phase sequence detection device through a cable. One end of the switching cable 8 is connected with an output cable interface of the portable automatic phase sequence detection device, and the other end of the switching cable is connected with a low-voltage power grid.
(2) The automatic phase sequence detection system 3 starts to operate by pressing the phase sequence detection switch 306.
(3) If the input cable interface and the output cable interface are positive phase sequences, the first power control relay 302 and the third power control relay 304 act, corresponding normally open contacts are closed, the phase sequences are the same, the first relay 301 acts in an electrified mode, the phase sequence is the same, the indicator lamp 307 works, and the circuit breaker 2 allows closing. The opening and closing switch 5 is operated, the circuit breaker closing mechanism 202 is powered on to act, the circuit breaker 2 is closed, and the power supply of the emergency equipment is transmitted to the low-voltage distribution network;
if the input cable interface power supply is in a positive phase sequence, the output cable interface power supply is in a reverse phase sequence, the first power supply control relay 302 and the fourth power supply control relay 305 act, corresponding normally open contacts are closed, the phase sequences are different at the moment, the first relay 301 does not act, the indicating lamps 308 with different phase sequences work, and the circuit breaker 2 is forbidden to be switched on. At the moment, any two phases at one end of the adapter cable 8 connected with the output cable interface are exchanged, and automatic phase sequence detection is carried out again;
if the input cable interface power supply is in a reverse phase sequence, the output cable interface power supply is in a positive phase sequence, the second power supply control relay 303 and the third power supply control relay 304 act, corresponding normally open contacts are closed, the phase sequences are different at the moment, the first relay 301 does not act, the indicating lamps 308 with different phase sequences work, and the circuit breaker 2 is forbidden to be switched on. At the moment, any two phases at one end of the adapter cable 8 connected with the output cable interface are exchanged, and automatic phase sequence detection is carried out again;
if the power supplies of the input cable interface and the output cable interface are in the reverse phase sequence, the second power supply control relay 303 and the fourth power supply control relay 305 act to close corresponding normally open contacts, the phase sequence is the same at the moment, the first relay 301 acts by being electrified, the indicator light 307 with the same phase sequence works, and the circuit breaker 2 allows closing. And when the opening and closing switch 5 is operated, the circuit breaker closing mechanism 202 is electrified to act, the circuit breaker 2 is closed, and the power supply of the emergency equipment is conveyed to the low-voltage distribution network.
To sum up, the utility model discloses a portable automatic phase sequence device that examines at first adopts the phase sequence classification of the three phase current of power control relay detection different circuit or different group transformer, and rethread power control relay looks inverting connection mode compares last phase sequence classification, can detect out reliably whether the phase sequence of arbitrary low voltage power is the same. The problems that in the prior art, an automatic phase checking device can only detect whether the three-phase power supply phases of transformers in the same group are the same or not and the reliability is solved, the problems of low safety and complex operation of manual phase sequence detection are solved, and the safety and the rapid power supply of emergency equipment are guaranteed. Meanwhile, the phase sequence detecting device is also provided with a cable interface and a switching cable, the emergency equipment can be conveniently and quickly connected into a low-voltage power grid by adopting a cable, the problems of field cable modification and repeated cable purchase of the emergency equipment are solved, and a large amount of manpower and material resources are saved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A portable automatic phase sequence detection device comprises a box body (1), a circuit breaker (2), a cable interface (4), a switching-on/off switch (5) and an automatic phase sequence detection system (3), and is characterized in that the automatic phase sequence detection system (3) comprises a phase sequence detection switch (306), a first relay (301), a same phase sequence indicator lamp (307), different phase sequence indicator lamps (308) and two groups of power supply control relays; each group of two power supply control relays are respectively connected to the input end and the output end of the circuit breaker (2), and the phase sequence of the two groups of power supply control relays is opposite to that of the two groups of power supply control relays connected with the input end and the output end of the circuit breaker (2); one group of normally open contacts of the two power supply control relays in the same group are connected in series, the two groups of power supply control relays are connected in parallel after being connected in series, and a coil of the first relay (301) is connected with the other ends of the normally open contacts of the two groups of power supply control relays after being connected in series respectively; the first relay (301) comprises two groups of normally open contacts and one group of normally closed contacts, one group of normally open contacts are connected with the indicating lamp (307) with the same phase sequence, the other group of normally closed contacts are connected with the opening and closing switch (5) in series, and one group of normally closed contacts are connected with the indicating lamp (308) with the different phase sequence.
2. A portable automatic phase sequence checking device according to claim 1, wherein the power control relays are a first power control relay (302), a second power control relay (303), a third power control relay (304) and a fourth power control relay (305), respectively; the power A phase, the power B phase and the power C phase of the first power control relay (302) are connected with the power A phase, the power B phase and the power C phase of the input end of the circuit breaker (2), the power A phase, the power B phase and the power C phase of the second power control relay (303) are connected with the power C phase, the power B phase and the power A phase of the input end of the circuit breaker (2), the power B phase and the power C phase of the input end of the circuit breaker (2), the power A phase, the power B phase and the power C phase of the third power control relay (304) are connected with the power A phase, the power B phase and the power C phase of the output end of the circuit breaker (2), and the power A phase.
3. The portable automatic phase sequence detecting device according to claim 2, wherein the circuit breaker (2) comprises a circuit breaker body (201), a circuit breaker closing mechanism (202) and a circuit breaker opening mechanism (203), and the opening and closing switch (5) is respectively connected with the circuit breaker closing mechanism (202) and the circuit breaker opening mechanism (203); the cable interfaces (4) are arranged on two sides of the box body (1) and comprise input cable interfaces and output cable interfaces, wherein each input cable interface comprises an input N-phase interface (404), an input A-phase interface (401), an input B-phase interface (402) and an input C-phase interface (403), and the input A-phase interface, the input B-phase interface and the input C-phase interface are respectively connected with an input end A-phase terminal, a input end B-phase terminal and an input end C-phase terminal of the circuit breaker (2); the output cable interface comprises an output N-phase interface (408), an output A-phase interface (405), an output B-phase interface (406) and an output C-phase interface (407), wherein the output A-phase interface, the output B-phase interface and the output C-phase interface are respectively connected with an output end A-phase terminal, an output end B-phase terminal and an output end C-phase terminal of the circuit breaker (2), and the input N-phase interface (404) is connected with the output N-phase interface (408).
4. The portable automatic phase sequence detection device according to claim 3, wherein the input cable interface is a quick connector or a copper bar, and the output cable interface is a quick connector; the cable interface (4) is connected with the circuit breaker (2) by a cable or a copper bar.
5. The portable automatic phase sequence detecting device according to claim 4, wherein the output cable interface is connected with a transfer cable (8), one end of the transfer cable (8) is a quick connector connected with the output cable interface, and the other end is configured with a plurality of interface forms capable of being matched with various forms of interfaces of a low-voltage distribution network.
6. A portable automatic phase sequence checking device according to claim 5, characterized in that the end of the transfer cable (8) connected to the low voltage distribution network is provided with an interface in the form of a copper terminal or a quick connector or a lead clamp.
7. A portable automatic phase sequence checking device according to claim 1, characterized in that the device further comprises a voltage and current display device (6), the voltage and current display device (6) comprises a current signal detection device (602) installed on a cable or a copper bar connected with the circuit breaker (2) by the cable interface (4) and an electric power multifunctional meter (601) for displaying voltage, current, power and frequency.
8. A portable automatic phase sequence detection device according to claim 1, further comprising a quasi-synchronous controller (309) for comparing voltage amplitude and phase angle.
9. The portable automatic phase sequence checking device according to claim 1, characterized in that the device further comprises an electricity testing port (7), the electricity testing port (7) comprises an input electricity testing port and an output electricity testing port, the input electricity testing port is connected with the input end of the circuit breaker (2), the output electricity testing port is connected with the output end of the circuit breaker (2), and the electricity testing port (7) is provided with an insulation protection and electric shock prevention structure.
10. The portable automatic phase sequence detecting device according to claim 1, wherein the box body (1) comprises a box body (102), a handle (104), a door lock (103) with a fingerprint identification function and a universal wheel (101), and the box body (102) is of a double-layer door structure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922132537.4U CN211627693U (en) | 2019-12-03 | 2019-12-03 | Portable automatic phase sequence detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922132537.4U CN211627693U (en) | 2019-12-03 | 2019-12-03 | Portable automatic phase sequence detection device |
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| CN211627693U true CN211627693U (en) | 2020-10-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021109833A1 (en) * | 2019-12-03 | 2021-06-10 | 徐州海伦哲特种车辆有限公司 | Portable automatic phase sequence detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021109833A1 (en) * | 2019-12-03 | 2021-06-10 | 徐州海伦哲特种车辆有限公司 | Portable automatic phase sequence detection device |
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