CN111864559B - 400-volt bypass switch and nuclear phase current and voltage monitoring device and application method - Google Patents
400-volt bypass switch and nuclear phase current and voltage monitoring device and application method Download PDFInfo
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- CN111864559B CN111864559B CN202010611773.9A CN202010611773A CN111864559B CN 111864559 B CN111864559 B CN 111864559B CN 202010611773 A CN202010611773 A CN 202010611773A CN 111864559 B CN111864559 B CN 111864559B
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000000819 phase cycle Methods 0.000 claims abstract description 147
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 73
- 229910052742 iron Inorganic materials 0.000 claims abstract description 37
- 230000007704 transition Effects 0.000 claims description 37
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 28
- 239000003973 paint Substances 0.000 claims description 28
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 5
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 claims description 4
- 150000002505 iron Chemical class 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/202—Cable lay-outs
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/32—Mounting of devices therein
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/46—Boxes; Parts thereof or accessories therefor
- H02B1/48—Mounting of devices therein
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
Abstract
The multifunctional bypass switch cabinet is composed of a cabinet body structure of a iron plate; the connectors of the low-voltage flexible cable are arranged and fixed at two ends of the low-voltage flexible cable and can be quickly connected to cylinders such as a screw rod in a plugging manner; voltmeter, three-phase ammeter and nuclear phase ware are installed on the top panel. The application method of the 400-volt bypass switch and the nuclear phase current and voltage monitoring device comprises the steps that the other ends of 4 low-voltage flexible cables at the wire inlet side are inserted into corresponding wire inlet end cable quick plug interfaces on a multifunctional bypass switch cabinet in the complete device; after the bypass normally operates, whether the bypass can shunt the line to be overhauled or not is judged through the reading of the three-phase ammeter in the multifunctional bypass switch cabinet in the complete device. The invention has the advantages that: the personal safety is guaranteed, the bypass phase sequence can be conveniently and quickly checked and adjusted, and the operation efficiency and safety are improved.
Description
Technical Field
The invention relates to the technical field of power construction auxiliary tools, in particular to a 400-volt bypass switch, a nuclear phase current and voltage monitoring device and a using method.
Background
With the rapid development of economy and society, the requirements of power consumers on the reliability of power supply are higher and higher, and the uninterrupted operation is one of important measures for improving the reliability of power supply. In uninterrupted operation, the uninterrupted operation of 0.4 kilovolt by-pass operation occupies a considerable proportion, an operator usually adopts a common low-voltage air switch as a by-pass switch, the by-pass current and voltage conditions cannot be monitored in real time, and the phase sequences at two sides of the switch cannot be checked rapidly, so that the operation preparation time is long. Because the operator directly operates the bypass switch to be turned on or off, when the bypass switch is insulated or the machine fails, the operator is easily injured. Meanwhile, as the length of the low-voltage sleeve of the transformer is short, equipment around the low-voltage sleeve is densely arranged, the operation environment is complex, and the connector of the low-voltage flexible cable is difficult to reliably install on the low-voltage sleeve.
Disclosure of Invention
The invention aims to monitor bypass current and voltage in real time in 0.4 kilovolt uninterrupted operation by adopting a bypass operation method, can check phase sequences at two sides of a bypass switch rapidly and reliably, improve operation efficiency, and simultaneously can safely install a connector of a bypass cable on a low-voltage sleeve of a transformer, improve operation safety, and particularly provides a 400 volt bypass switch, a nuclear phase current and voltage monitoring device and a using method.
The invention provides a 400-volt bypass switch and a nuclear phase current and voltage monitoring device, which are characterized in that: the 400-volt bypass switch and the nuclear phase current and voltage monitoring device comprise a multifunctional bypass switch cabinet, a transitional connector, a low-voltage flexible cable with a connector, a connector of the low-voltage flexible cable, a cabinet body, an outer cabinet door, an observation window, an air vent, an upper panel, a lower panel, a voltmeter, a three-phase ammeter, a nuclear phase device, a nuclear phase indicator, a multifunctional metering display meter, a switch operating handle, an opening and closing indicator, a load switch, a zero line connecting plate, a phase sequence protection relay, a phase sequence protection circuit breaker, a phase sequence protection fuse, an iron frame, a cable inlet end cable quick plug interface, a cable outlet end cable quick plug interface, a connecting frame, a low-voltage sleeve clamping bolt, a low-voltage sleeve compression nut, an adapter and an adapter clamping bolt;
wherein, the multifunctional bypass switch cabinet is formed by a cabinet body structure of a sheet iron piece; the transition connector is a copper part, is coated with insulating paint, and is a transition connecting device between the low-voltage sleeve of the transformer and the low-voltage flexible cable connector; the cable connector is arranged at two ends of the low-voltage flexible cable with the connector, and the total number of the cable connectors is 8; the connectors of the low-voltage flexible cable are arranged and fixed at two ends of the low-voltage flexible cable and can be quickly connected to cylinders such as a screw rod in a plugging manner; the cabinet body adopts a iron plate, and has enough mechanical strength; the outer box door is movably connected with the box body through a hinge by adopting a sheet iron piece, and one side of the outer box door is provided with a mechanical rotary door lock; the observation window is positioned at the upper part of the outer box door, and an acrylic glass material piece is adopted, so that an operator can check the conditions of the upper panel and the lower panel of the cabinet body under the condition that the outer box door is not opened through the observation window; the air holes are positioned at the lower part of the outer box door, so that the air in and out of the cabinet body can be exchanged, and the moisture in the cabinet body can be removed; the upper panel is movably connected with the cabinet body through a hydraulic stay bar by adopting a iron plate; the lower panel adopts a iron plate, is movably connected with the cabinet body through a hydraulic supporting rod, and is provided with a voltmeter; the three-phase ammeter is arranged on the upper panel, the front side of the electronic instrument can read three-phase current values, and the back side of the electronic instrument is provided with a wiring terminal, so that bypass three-phase current conditions can be measured; the phase checking device is arranged on the upper panel, the front surface can check the state of the phase checking device, and the back surface is provided with a wiring terminal, so that the phase sequence conditions of the two sides of the load switch can be automatically detected; a nuclear phase indicator lamp mounted on the upper panel; the multifunctional metering display meter is arranged on the lower panel, the front surface can check the real-time and historical power and electric quantity of the bypass, and the back surface is provided with a wiring terminal; the switch operating handle is made of an insulating material, the front surface of the switch operating handle is provided with corresponding opening and closing indication boards, an operator controls opening and closing of the load switch by rotating the handle, and the back surface of the switch operating handle is connected with the load switch; the switching-on/off indicator lamps are 2 in number, the front faces are indicator lamps, the switching-on indicator lamps are green, the switching-on indicator lamps are red, the load switch state can be visually displayed through the on/off of the switching-on indicator lamps, and the back faces are provided with wiring terminals; the load switch adopts a low-voltage air switch and can cut off bypass load current; the zero line connecting plate is made of copper and plays a role in connecting a zero line cable of the wire inlet end and the wire outlet end; the phase sequence protection relay can automatically judge whether the bypass phase sequence is correct or not, and can control the opening and closing of the phase sequence protection circuit breaker according to the judging result; the phase sequence protection circuit breaker adopts a normally closed air circuit breaker, and automatically trips when receiving a signal of distinguishing phase sequence errors of the phase sequence protection relay, thereby playing a role of protecting a bypass; the phase sequence protection fuse can prevent the phase sequence protection relay from burning out caused by overcurrent; the iron stand is connected with the cabinet body and is used for fixing the load switch, the zero line connecting plate, the phase sequence protection relay, the phase sequence protection circuit breaker and the phase sequence protection fuse wire on the cabinet body; the cable plays an electric connection role among the fast plug interfaces of the cable at the wire inlet end, the load switch, the zero line connecting plate, the phase sequence protection circuit breaker and the cable at the wire outlet end; the cable fast plug interface of the wire inlet end is positioned at the back of the multifunctional bypass switch cabinet; the cable outlet end quick plug interface is positioned at the back of the multifunctional bypass switch cabinet; a connecting frame, copper parts; the low-voltage sleeve clamps the bolt and the insulating paint is externally brushed; the low-voltage sleeve compresses the nut and is externally brushed with insulating paint; the adapter is a copper product; and when the adapter rotates to a proper angle, the adapter clamping bolt is screwed to enable the connecting frame to clamp the adapter, and the angle of the adapter is fixed and is tightly connected with the connecting frame.
The voltmeter, totally 3, install on the top panel, mechanical instrument, the front can read the voltage value, the back is equipped with binding post, can measure the load switch both ends three-phase voltage condition.
The nuclear phase indicator lamps are arranged on the upper panel, the front face is provided with the indicator lamps, the results of checking the phase sequences at the two sides of the load switch by the nuclear phase indicator can be visually displayed through the on and off of the lamps, when the lamps are on, the phase sequence error is proved, when the lamps are off, the phase sequence is correct, and the back face is provided with the wiring terminals.
The quick plug interface of incoming line end cable is located multi-functional bypass switch cabinet back, and the connector of low pressure flexible cable can be connected through the mode of plug to one end to be equipped with the locking mechanism, prevent to drop after the cable inserts, the other end extends to the cabinet internal portion.
The quick plug interface of the outgoing line end cable is positioned at the back of the multifunctional bypass switch cabinet, one end of the quick plug interface can be connected with a connector of the low-voltage flexible cable in a plug mode, and the quick plug interface is provided with a locking mechanism for preventing the outgoing line end cable from falling off after the cable is inserted, and the other end of the quick plug interface extends to the inside of the cabinet body.
The connecting frame, the copper part and the external brushing insulating paint have good conductivity, can be sleeved on a low-voltage sleeve of a distribution transformer and horizontally rotate by taking the low-voltage sleeve as an axis.
And after the connecting frame is sleeved into the low-voltage sleeve, the low-voltage sleeve clamping bolt is screwed down to enable the connecting frame to clamp the low-voltage sleeve and be tightly connected with the low-voltage sleeve.
The low-voltage sleeve pressing nut is externally brushed with insulating paint, and is arranged on a bolt exposed out of the low-voltage sleeve after the connecting frame is sleeved into the low-voltage sleeve and presses the connecting frame to prevent the connecting frame from falling off from the low-voltage sleeve.
The adapter is made of copper, is externally painted with insulating paint, has good conductivity, one end of the adapter is arranged on the connecting frame, and the other end of the adapter can rotate in the vertical direction by 360 degrees after being bent by 90 degrees and can be connected with the connector of the low-voltage cable.
A400 volt bypass switch and a using method of a nuclear phase current and voltage monitoring device are characterized in that:
step one: after adjusting proper angles of 4 transition connectors in the complete equipment, an operator installs the transition connectors on a low-voltage sleeve of a transformer, screws a low-voltage sleeve clamping bolt and a low-voltage sleeve clamping nut to enable the transition connectors to be connected with the low-voltage sleeve of the transformer, and then connects one ends of 4 low-voltage flexible cables on the wire inlet side to the transition connectors;
Step two: the operator inserts the other ends of the 4 low-voltage flexible cables at the wire inlet side into the corresponding wire inlet end cable quick plug interfaces on the multifunctional bypass switch cabinet in the complete equipment, and the locking mechanism ensures the reliable connection;
step three: an operator inserts one end of 4 low-voltage flexible cables on the outlet side into a corresponding outlet end cable quick plug interface on a multifunctional bypass switch cabinet in the complete device, and a locking mechanism ensures that the cables can be connected by virtue of the locking mechanism, and the other end of the cables is connected to a load side pipeline;
step four: at the moment, the phase-checking device and the 3 voltmeters in the multifunctional bypass switch cabinet automatically check the phase sequences of the circuits at the two sides of the switch, when the phase sequences at the two sides of the switch are all correct, the 3 nuclear phase indicator lamps are all turned off, the readings of the three-phase voltmeters are 220V, when the phase sequences at the two sides of the load switch are wrong, the nuclear phase indicator lamps of the corresponding phases are turned on, the readings of the voltmeters of the corresponding phases are 380V, and operators can safely and quickly adjust the phase sequences through the quick plugging interfaces of the cable at the wire inlet and outlet ends according to the conditions of the on-off of the nuclear phase indicator lamps and the readings of the voltmeters;
step five: when the phase sequences are all correct, an operator rotates a switch operation handle in a multifunctional bypass switch cabinet in the complete device from a separated position to a combined position, and if the actual bypass phase sequence is wrong due to faults of a voltmeter and a phase checking device, a phase sequence protection relay automatically trips a control phase sequence protection circuit breaker to cut off a bypass loop;
Step six: after the bypass normally operates, an operator can judge whether the bypass can be used for reliably shunting a line to be overhauled or not through the reading of the three-phase ammeter in the multifunctional bypass switch cabinet in the complete device, and can check data such as power, electric quantity and the like of the bypass through the multifunctional metering display meter.
The invention has the advantages that: the multifunctional bypass switch cabinet can cut off load current and fault current of the low-voltage circuit, and meets the requirement of insulation grade; the multifunctional bypass switch cabinet has an automatic phase checking function, so that the working preparation time is effectively shortened, the phase sequence checking result is conveniently and intuitively checked through the reading of the indicating lamp and the voltmeter, even if the phase checking relay and the voltmeter are simultaneously out of order, the bypass can still be reliably protected from faults and power failure, the phase sequence is checked through three non-identical principles and non-homologous methods, and the checking result is high in accuracy; the multifunctional bypass switch cabinet can realize quick plug connection of the low-voltage flexible cable, phase sequence is convenient to adjust when the phase sequence is wrong, and meanwhile, a locking mechanism is arranged at a quick plug interface of the cable at the wire inlet and outlet ends, so that the cable can be prevented from falling off after being connected, and the connection is reliable; the multifunctional bypass switch cabinet can monitor bypass current and voltage conditions in real time, visually know bypass operation states and shunt conditions, and can also call bypass power, electric quantity real-time and historical data, so that operation staff can conveniently count, analyze and evaluate work afterwards; the upper panel and the lower panel of the multifunctional bypass switch cabinet have enough mechanical strength, and the switch operating handle has corresponding insulating strength, so that operators can be effectively protected when a load switch leaks electricity or explodes due to faults; the transition connector is tightly connected to the low-voltage sleeve of the transformer by a double fastening mode of a low-voltage sleeve clamping bolt and a low-voltage sleeve compression nut on the transition connector, so that the connection is firm and reliable; the transition connector is externally coated with insulating paint, so that safety guarantee is provided for uninterrupted operation; the connector of the transition connector is designed according to the characteristics of the mounting mode of the low-voltage flexible cable connector, and is firmly and reliably connected with the low-voltage flexible cable connector; the connector of the transition connector can rotate along the vertical direction, the connecting frame can horizontally rotate along the low-voltage sleeve as an axis after being sleeved into the low-voltage sleeve of the distribution transformer, the installation angle of the low-voltage flexible cable connector can be flexibly adjusted at the equipment dense position where the low-voltage sleeve of the transformer is positioned, and the installation operation of operators is facilitated;
The low-voltage flexible cable connector can be connected with the low-voltage sleeve of the transformer through the transition connector, so that the falling risk is avoided, and the operation safety is ensured.
In summary, according to the 400-volt bypass switch and the nuclear phase current and voltage monitoring device, operators are isolated from an electric loop, personal safety is guaranteed, bypass phase sequences can be conveniently and quickly checked and adjusted, a triple phase sequence checking and protecting function is achieved, checking results are safe and accurate, data of bypass current, voltage and the like can be visually checked, operators can conveniently know the real-time state of the bypass and analyze and evaluate the bypass afterwards, the problem that a connector of a low-voltage flexible cable cannot be mounted on a low-voltage sleeve of a transformer is effectively solved, and operation efficiency and safety are improved.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and embodiments:
FIG. 1 is a general assembly view;
FIG. 2 is a schematic front view;
FIG. 3 is a schematic view of the upper and lower panels of the cabinet after opening the outer door of the multifunctional bypass switch cabinet;
FIG. 4 is a schematic view of the interior of the cabinet after opening the upper and lower panels of the multifunctional bypass switch cabinet;
FIG. 5 is a schematic diagram of the back of the multi-function bypass switch cabinet;
FIG. 6 is a schematic diagram of a transition connector;
in the figure, 1 is a multifunctional bypass switch cabinet, 2 is a transitional connector, 3 is a low-voltage flexible cable with a connector, 4 is a connector of the low-voltage flexible cable, 5 is a cabinet body, 6 is an outer cabinet door, 7 is an observation window, 8 is an air vent, 9 is an upper panel, 10 is a lower panel, 11 is a voltmeter, 12 is a three-phase ammeter, 13 is a nuclear phase device, 14 is a nuclear phase indicator, 15 is a multifunctional metering display meter, 16 is a switch operation handle, 17 is a switching-on/switching-off indicator, 18 is a load switch, 19 is a zero line connecting plate, 20 is a phase sequence protection relay, 21 is a phase sequence protection circuit breaker, 22 is a phase sequence protection fuse, 23 is an iron stand, 24 is a cable, 25 is a wire inlet end cable quick plug interface, 26 is a wire outlet end cable quick plug interface, 27 is a connecting frame, 28 is a low-voltage sleeve clamping bolt, 29 is a low-voltage sleeve pressing nut, 30 is a switching-on connector, and 31 is a switching-on joint clamping bolt.
Detailed Description
Example 1
The invention provides a 400-volt bypass switch and a nuclear phase current and voltage monitoring device, which are characterized in that: the 400-volt bypass switch and the nuclear phase current and voltage monitoring device comprise a multifunctional bypass switch cabinet, a transitional connector, a low-voltage flexible cable with a connector, a connector of the low-voltage flexible cable, a cabinet body, an outer cabinet door, an observation window, an air vent, an upper panel, a lower panel, a voltmeter, a three-phase ammeter, a nuclear phase device, a nuclear phase indicator, a multifunctional metering display meter, a switch operating handle, an opening and closing indicator, a load switch, a zero line connecting plate, a phase sequence protection relay, a phase sequence protection circuit breaker, a phase sequence protection fuse, an iron frame, a cable inlet end cable quick plug interface, a cable outlet end cable quick plug interface, a connecting frame, a low-voltage sleeve clamping bolt, a low-voltage sleeve compression nut, an adapter and an adapter clamping bolt;
Wherein, the multifunctional bypass switch cabinet is formed by a cabinet body structure of a sheet iron piece; the transition connector is a copper part, is coated with insulating paint, and is a transition connecting device between the low-voltage sleeve of the transformer and the low-voltage flexible cable connector; the cable connector is arranged at two ends of the low-voltage flexible cable with the connector, and the total number of the cable connectors is 8; the connectors of the low-voltage flexible cable are arranged and fixed at two ends of the low-voltage flexible cable and can be quickly connected to cylinders such as a screw rod in a plugging manner; the cabinet body adopts a iron plate, and has enough mechanical strength; the outer box door is movably connected with the box body through a hinge by adopting a sheet iron piece, and one side of the outer box door is provided with a mechanical rotary door lock; the observation window is positioned at the upper part of the outer box door, and an acrylic glass material piece is adopted, so that an operator can check the conditions of the upper panel and the lower panel of the cabinet body under the condition that the outer box door is not opened through the observation window; the air holes are positioned at the lower part of the outer box door, so that the air in and out of the cabinet body can be exchanged, and the moisture in the cabinet body can be removed; the upper panel is movably connected with the cabinet body through a hydraulic stay bar by adopting a iron plate; the lower panel adopts a iron plate, is movably connected with the cabinet body through a hydraulic supporting rod, and is provided with a voltmeter; the three-phase ammeter is arranged on the upper panel, the front side of the electronic instrument can read three-phase current values, and the back side of the electronic instrument is provided with a wiring terminal, so that bypass three-phase current conditions can be measured; the phase checking device is arranged on the upper panel, the front surface can check the state of the phase checking device, and the back surface is provided with a wiring terminal, so that the phase sequence conditions of the two sides of the load switch can be automatically detected; a nuclear phase indicator lamp mounted on the upper panel; the multifunctional metering display meter is arranged on the lower panel, the front surface can check the real-time and historical power and electric quantity of the bypass, and the back surface is provided with a wiring terminal; the switch operating handle is made of an insulating material, the front surface of the switch operating handle is provided with corresponding opening and closing indication boards, an operator controls opening and closing of the load switch by rotating the handle, and the back surface of the switch operating handle is connected with the load switch; the switching-on/off indicator lamps are 2 in number, the front faces are indicator lamps, the switching-on indicator lamps are green, the switching-on indicator lamps are red, the load switch state can be visually displayed through the on/off of the switching-on indicator lamps, and the back faces are provided with wiring terminals; the load switch adopts a low-voltage air switch and can cut off bypass load current; the zero line connecting plate is made of copper and plays a role in connecting a zero line cable of the wire inlet end and the wire outlet end; the phase sequence protection relay can automatically judge whether the bypass phase sequence is correct or not, and can control the opening and closing of the phase sequence protection circuit breaker according to the judging result; the phase sequence protection circuit breaker adopts a normally closed air circuit breaker, and automatically trips when receiving a signal of distinguishing phase sequence errors of the phase sequence protection relay, thereby playing a role of protecting a bypass; the phase sequence protection fuse can prevent the phase sequence protection relay from burning out caused by overcurrent; the iron stand is connected with the cabinet body and is used for fixing the load switch, the zero line connecting plate, the phase sequence protection relay, the phase sequence protection circuit breaker and the phase sequence protection fuse wire on the cabinet body; the cable plays an electric connection role among the fast plug interfaces of the cable at the wire inlet end, the load switch, the zero line connecting plate, the phase sequence protection circuit breaker and the cable at the wire outlet end; the cable fast plug interface of the wire inlet end is positioned at the back of the multifunctional bypass switch cabinet; the cable outlet end quick plug interface is positioned at the back of the multifunctional bypass switch cabinet; a connecting frame, copper parts; the low-voltage sleeve clamps the bolt and the insulating paint is externally brushed; the low-voltage sleeve compresses the nut and is externally brushed with insulating paint; the adapter is a copper product; and when the adapter rotates to a proper angle, the adapter clamping bolt is screwed to enable the connecting frame to clamp the adapter, and the angle of the adapter is fixed and is tightly connected with the connecting frame.
The voltmeter, totally 3, install on the top panel, mechanical instrument, the front can read the voltage value, the back is equipped with binding post, can measure the load switch both ends three-phase voltage condition.
The nuclear phase indicator lamps are arranged on the upper panel, the front face is provided with the indicator lamps, the results of checking the phase sequences at the two sides of the load switch by the nuclear phase indicator can be visually displayed through the on and off of the lamps, when the lamps are on, the phase sequence error is proved, when the lamps are off, the phase sequence is correct, and the back face is provided with the wiring terminals.
The quick plug interface of incoming line end cable is located multi-functional bypass switch cabinet back, and the connector of low pressure flexible cable can be connected through the mode of plug to one end to be equipped with the locking mechanism, prevent to drop after the cable inserts, the other end extends to the cabinet internal portion.
The quick plug interface of the outgoing line end cable is positioned at the back of the multifunctional bypass switch cabinet, one end of the quick plug interface can be connected with a connector of the low-voltage flexible cable in a plug mode, and the quick plug interface is provided with a locking mechanism for preventing the outgoing line end cable from falling off after the cable is inserted, and the other end of the quick plug interface extends to the inside of the cabinet body.
The connecting frame, the copper part and the external brushing insulating paint have good conductivity, can be sleeved on a low-voltage sleeve of a distribution transformer and horizontally rotate by taking the low-voltage sleeve as an axis.
And after the connecting frame is sleeved into the low-voltage sleeve, the low-voltage sleeve clamping bolt is screwed down to enable the connecting frame to clamp the low-voltage sleeve and be tightly connected with the low-voltage sleeve.
The low-voltage sleeve pressing nut is externally brushed with insulating paint, and is arranged on a bolt exposed out of the low-voltage sleeve after the connecting frame is sleeved into the low-voltage sleeve and presses the connecting frame to prevent the connecting frame from falling off from the low-voltage sleeve.
The adapter is made of copper, is externally painted with insulating paint, has good conductivity, one end of the adapter is arranged on the connecting frame, and the other end of the adapter can rotate in the vertical direction by 360 degrees after being bent by 90 degrees and can be connected with the connector of the low-voltage cable.
A400 volt bypass switch and a using method of a nuclear phase current and voltage monitoring device are characterized in that:
step one: after adjusting proper angles of 4 transition connectors in the complete equipment, an operator installs the transition connectors on a low-voltage sleeve of a transformer, screws a low-voltage sleeve clamping bolt and a low-voltage sleeve clamping nut to enable the transition connectors to be connected with the low-voltage sleeve of the transformer, and then connects one ends of 4 low-voltage flexible cables on the wire inlet side to the transition connectors;
Step two: the operator inserts the other ends of the 4 low-voltage flexible cables at the wire inlet side into the corresponding wire inlet end cable quick plug interfaces on the multifunctional bypass switch cabinet in the complete equipment, and the locking mechanism ensures the reliable connection;
step three: an operator inserts one end of 4 low-voltage flexible cables on the outlet side into a corresponding outlet end cable quick plug interface on a multifunctional bypass switch cabinet in the complete device, and a locking mechanism ensures that the cables can be connected by virtue of the locking mechanism, and the other end of the cables is connected to a load side pipeline;
step four: at the moment, the phase-checking device and the 3 voltmeters in the multifunctional bypass switch cabinet automatically check the phase sequences of the circuits at the two sides of the switch, when the phase sequences at the two sides of the switch are all correct, the 3 nuclear phase indicator lamps are all turned off, the readings of the three-phase voltmeters are 220V, when the phase sequences at the two sides of the load switch are wrong, the nuclear phase indicator lamps of the corresponding phases are turned on, the readings of the voltmeters of the corresponding phases are 380V, and operators can safely and quickly adjust the phase sequences through the quick plugging interfaces of the cable at the wire inlet and outlet ends according to the conditions of the on-off of the nuclear phase indicator lamps and the readings of the voltmeters;
step five: when the phase sequences are all correct, an operator rotates a switch operation handle in a multifunctional bypass switch cabinet in the complete device from a separated position to a combined position, and if the actual bypass phase sequence is wrong due to faults of a voltmeter and a phase checking device, a phase sequence protection relay automatically trips a control phase sequence protection circuit breaker to cut off a bypass loop;
Step six: after the bypass normally operates, an operator can judge whether the bypass can be used for reliably shunting a line to be overhauled or not through the reading of the three-phase ammeter in the multifunctional bypass switch cabinet in the complete device, and can check data such as power, electric quantity and the like of the bypass through the multifunctional metering display meter.
Example 2
The invention provides a 400-volt bypass switch and a nuclear phase current and voltage monitoring device, which are characterized in that: the 400-volt bypass switch and the nuclear phase current and voltage monitoring device comprise a multifunctional bypass switch cabinet, a transitional connector, a low-voltage flexible cable with a connector, a connector of the low-voltage flexible cable, a cabinet body, an outer cabinet door, an observation window, an air vent, an upper panel, a lower panel, a voltmeter, a three-phase ammeter, a nuclear phase device, a nuclear phase indicator, a multifunctional metering display meter, a switch operating handle, an opening and closing indicator, a load switch, a zero line connecting plate, a phase sequence protection relay, a phase sequence protection circuit breaker, a phase sequence protection fuse, an iron frame, a cable inlet end cable quick plug interface, a cable outlet end cable quick plug interface, a connecting frame, a low-voltage sleeve clamping bolt, a low-voltage sleeve compression nut, an adapter and an adapter clamping bolt;
Wherein, the multifunctional bypass switch cabinet is formed by a cabinet body structure of a sheet iron piece; the transition connector is a copper part, is coated with insulating paint, and is a transition connecting device between the low-voltage sleeve of the transformer and the low-voltage flexible cable connector; the cable connector is arranged at two ends of the low-voltage flexible cable with the connector, and the total number of the cable connectors is 8; the connectors of the low-voltage flexible cable are arranged and fixed at two ends of the low-voltage flexible cable and can be quickly connected to cylinders such as a screw rod in a plugging manner; the cabinet body adopts a iron plate, and has enough mechanical strength; the outer box door is movably connected with the box body through a hinge by adopting a sheet iron piece, and one side of the outer box door is provided with a mechanical rotary door lock; the observation window is positioned at the upper part of the outer box door, and an acrylic glass material piece is adopted, so that an operator can check the conditions of the upper panel and the lower panel of the cabinet body under the condition that the outer box door is not opened through the observation window; the air holes are positioned at the lower part of the outer box door, so that the air in and out of the cabinet body can be exchanged, and the moisture in the cabinet body can be removed; the upper panel is movably connected with the cabinet body through a hydraulic stay bar by adopting a iron plate; the lower panel adopts a iron plate, is movably connected with the cabinet body through a hydraulic supporting rod, and is provided with a voltmeter; the three-phase ammeter is arranged on the upper panel, the front side of the electronic instrument can read three-phase current values, and the back side of the electronic instrument is provided with a wiring terminal, so that bypass three-phase current conditions can be measured; the phase checking device is arranged on the upper panel, the front surface can check the state of the phase checking device, and the back surface is provided with a wiring terminal, so that the phase sequence conditions of the two sides of the load switch can be automatically detected; a nuclear phase indicator lamp mounted on the upper panel; the multifunctional metering display meter is arranged on the lower panel, the front surface can check the real-time and historical power and electric quantity of the bypass, and the back surface is provided with a wiring terminal; the switch operating handle is made of an insulating material, the front surface of the switch operating handle is provided with corresponding opening and closing indication boards, an operator controls opening and closing of the load switch by rotating the handle, and the back surface of the switch operating handle is connected with the load switch; the switching-on/off indicator lamps are 2 in number, the front faces are indicator lamps, the switching-on indicator lamps are green, the switching-on indicator lamps are red, the load switch state can be visually displayed through the on/off of the switching-on indicator lamps, and the back faces are provided with wiring terminals; the load switch adopts a low-voltage air switch and can cut off bypass load current; the zero line connecting plate is made of copper and plays a role in connecting a zero line cable of the wire inlet end and the wire outlet end; the phase sequence protection relay can automatically judge whether the bypass phase sequence is correct or not, and can control the opening and closing of the phase sequence protection circuit breaker according to the judging result; the phase sequence protection circuit breaker adopts a normally closed air circuit breaker, and automatically trips when receiving a signal of distinguishing phase sequence errors of the phase sequence protection relay, thereby playing a role of protecting a bypass; the phase sequence protection fuse can prevent the phase sequence protection relay from burning out caused by overcurrent; the iron stand is connected with the cabinet body and is used for fixing the load switch, the zero line connecting plate, the phase sequence protection relay, the phase sequence protection circuit breaker and the phase sequence protection fuse wire on the cabinet body; the cable plays an electric connection role among the fast plug interfaces of the cable at the wire inlet end, the load switch, the zero line connecting plate, the phase sequence protection circuit breaker and the cable at the wire outlet end; the cable fast plug interface of the wire inlet end is positioned at the back of the multifunctional bypass switch cabinet; the cable outlet end quick plug interface is positioned at the back of the multifunctional bypass switch cabinet; a connecting frame, copper parts; the low-voltage sleeve clamps the bolt and the insulating paint is externally brushed; the low-voltage sleeve compresses the nut and is externally brushed with insulating paint; the adapter is a copper product; and when the adapter rotates to a proper angle, the adapter clamping bolt is screwed to enable the connecting frame to clamp the adapter, and the angle of the adapter is fixed and is tightly connected with the connecting frame.
The voltmeter, totally 3, install on the top panel, mechanical instrument, the front can read the voltage value, the back is equipped with binding post, can measure the load switch both ends three-phase voltage condition.
The nuclear phase indicator lamps are arranged on the upper panel, the front face is provided with the indicator lamps, the results of checking the phase sequences at the two sides of the load switch by the nuclear phase indicator can be visually displayed through the on and off of the lamps, when the lamps are on, the phase sequence error is proved, when the lamps are off, the phase sequence is correct, and the back face is provided with the wiring terminals.
And after the connecting frame is sleeved into the low-voltage sleeve, the low-voltage sleeve clamping bolt is screwed down to enable the connecting frame to clamp the low-voltage sleeve and be tightly connected with the low-voltage sleeve.
The low-voltage sleeve pressing nut is externally brushed with insulating paint, and is arranged on a bolt exposed out of the low-voltage sleeve after the connecting frame is sleeved into the low-voltage sleeve and presses the connecting frame to prevent the connecting frame from falling off from the low-voltage sleeve.
The adapter is made of copper, is externally painted with insulating paint, has good conductivity, one end of the adapter is arranged on the connecting frame, and the other end of the adapter can rotate in the vertical direction by 360 degrees after being bent by 90 degrees and can be connected with the connector of the low-voltage cable.
A400 volt bypass switch and a using method of a nuclear phase current and voltage monitoring device are characterized in that:
step one: after adjusting proper angles of 4 transition connectors in the complete equipment, an operator installs the transition connectors on a low-voltage sleeve of a transformer, screws a low-voltage sleeve clamping bolt and a low-voltage sleeve clamping nut to enable the transition connectors to be connected with the low-voltage sleeve of the transformer, and then connects one ends of 4 low-voltage flexible cables on the wire inlet side to the transition connectors;
step two: the operator inserts the other ends of the 4 low-voltage flexible cables at the wire inlet side into the corresponding wire inlet end cable quick plug interfaces on the multifunctional bypass switch cabinet in the complete equipment, and the locking mechanism ensures the reliable connection;
step three: an operator inserts one end of 4 low-voltage flexible cables on the outlet side into a corresponding outlet end cable quick plug interface on a multifunctional bypass switch cabinet in the complete device, and a locking mechanism ensures that the cables can be connected by virtue of the locking mechanism, and the other end of the cables is connected to a load side pipeline;
step four: at the moment, the phase-checking device and the 3 voltmeters in the multifunctional bypass switch cabinet automatically check the phase sequences of the circuits at the two sides of the switch, when the phase sequences at the two sides of the switch are all correct, the 3 nuclear phase indicator lamps are all turned off, the readings of the three-phase voltmeters are 220V, when the phase sequences at the two sides of the load switch are wrong, the nuclear phase indicator lamps of the corresponding phases are turned on, the readings of the voltmeters of the corresponding phases are 380V, and operators can safely and quickly adjust the phase sequences through the quick plugging interfaces of the cable at the wire inlet and outlet ends according to the conditions of the on-off of the nuclear phase indicator lamps and the readings of the voltmeters;
Step five: when the phase sequences are all correct, an operator rotates a switch operation handle in a multifunctional bypass switch cabinet in the complete device from a separated position to a combined position, and if the actual bypass phase sequence is wrong due to faults of a voltmeter and a phase checking device, a phase sequence protection relay automatically trips a control phase sequence protection circuit breaker to cut off a bypass loop;
step six: after the bypass normally operates, an operator can judge whether the bypass can be used for reliably shunting a line to be overhauled or not through the reading of the three-phase ammeter in the multifunctional bypass switch cabinet in the complete device, and can check data such as power, electric quantity and the like of the bypass through the multifunctional metering display meter.
Example 3
The invention provides a 400-volt bypass switch and a nuclear phase current and voltage monitoring device, which are characterized in that: the 400-volt bypass switch and the nuclear phase current and voltage monitoring device comprise a multifunctional bypass switch cabinet, a transitional connector, a low-voltage flexible cable with a connector, a connector of the low-voltage flexible cable, a cabinet body, an outer cabinet door, an observation window, an air vent, an upper panel, a lower panel, a voltmeter, a three-phase ammeter, a nuclear phase device, a nuclear phase indicator, a multifunctional metering display meter, a switch operating handle, an opening and closing indicator, a load switch, a zero line connecting plate, a phase sequence protection relay, a phase sequence protection circuit breaker, a phase sequence protection fuse, an iron frame, a cable inlet end cable quick plug interface, a cable outlet end cable quick plug interface, a connecting frame, a low-voltage sleeve clamping bolt, a low-voltage sleeve compression nut, an adapter and an adapter clamping bolt;
Wherein, the multifunctional bypass switch cabinet is formed by a cabinet body structure of a sheet iron piece; the transition connector is a copper part, is coated with insulating paint, and is a transition connecting device between the low-voltage sleeve of the transformer and the low-voltage flexible cable connector; the cable connector is arranged at two ends of the low-voltage flexible cable with the connector, and the total number of the cable connectors is 8; the connectors of the low-voltage flexible cable are arranged and fixed at two ends of the low-voltage flexible cable and can be quickly connected to cylinders such as a screw rod in a plugging manner; the cabinet body adopts a iron plate, and has enough mechanical strength; the outer box door is movably connected with the box body through a hinge by adopting a sheet iron piece, and one side of the outer box door is provided with a mechanical rotary door lock; the observation window is positioned at the upper part of the outer box door, and an acrylic glass material piece is adopted, so that an operator can check the conditions of the upper panel and the lower panel of the cabinet body under the condition that the outer box door is not opened through the observation window; the air holes are positioned at the lower part of the outer box door, so that the air in and out of the cabinet body can be exchanged, and the moisture in the cabinet body can be removed; the upper panel is movably connected with the cabinet body through a hydraulic stay bar by adopting a iron plate; the lower panel adopts a iron plate, is movably connected with the cabinet body through a hydraulic supporting rod, and is provided with a voltmeter; the three-phase ammeter is arranged on the upper panel, the front side of the electronic instrument can read three-phase current values, and the back side of the electronic instrument is provided with a wiring terminal, so that bypass three-phase current conditions can be measured; the phase checking device is arranged on the upper panel, the front surface can check the state of the phase checking device, and the back surface is provided with a wiring terminal, so that the phase sequence conditions of the two sides of the load switch can be automatically detected; a nuclear phase indicator lamp mounted on the upper panel; the multifunctional metering display meter is arranged on the lower panel, the front surface can check the real-time and historical power and electric quantity of the bypass, and the back surface is provided with a wiring terminal; the switch operating handle is made of an insulating material, the front surface of the switch operating handle is provided with corresponding opening and closing indication boards, an operator controls opening and closing of the load switch by rotating the handle, and the back surface of the switch operating handle is connected with the load switch; the switching-on/off indicator lamps are 2 in number, the front faces are indicator lamps, the switching-on indicator lamps are green, the switching-on indicator lamps are red, the load switch state can be visually displayed through the on/off of the switching-on indicator lamps, and the back faces are provided with wiring terminals; the load switch adopts a low-voltage air switch and can cut off bypass load current; the zero line connecting plate is made of copper and plays a role in connecting a zero line cable of the wire inlet end and the wire outlet end; the phase sequence protection relay can automatically judge whether the bypass phase sequence is correct or not, and can control the opening and closing of the phase sequence protection circuit breaker according to the judging result; the phase sequence protection circuit breaker adopts a normally closed air circuit breaker, and automatically trips when receiving a signal of distinguishing phase sequence errors of the phase sequence protection relay, thereby playing a role of protecting a bypass; the phase sequence protection fuse can prevent the phase sequence protection relay from burning out caused by overcurrent; the iron stand is connected with the cabinet body and is used for fixing the load switch, the zero line connecting plate, the phase sequence protection relay, the phase sequence protection circuit breaker and the phase sequence protection fuse wire on the cabinet body; the cable plays an electric connection role among the fast plug interfaces of the cable at the wire inlet end, the load switch, the zero line connecting plate, the phase sequence protection circuit breaker and the cable at the wire outlet end; the cable fast plug interface of the wire inlet end is positioned at the back of the multifunctional bypass switch cabinet; the cable outlet end quick plug interface is positioned at the back of the multifunctional bypass switch cabinet; a connecting frame, copper parts; the low-voltage sleeve clamps the bolt and the insulating paint is externally brushed; the low-voltage sleeve compresses the nut and is externally brushed with insulating paint; the adapter is a copper product; and when the adapter rotates to a proper angle, the adapter clamping bolt is screwed to enable the connecting frame to clamp the adapter, and the angle of the adapter is fixed and is tightly connected with the connecting frame.
The voltmeter, totally 3, install on the top panel, mechanical instrument, the front can read the voltage value, the back is equipped with binding post, can measure the load switch both ends three-phase voltage condition.
The nuclear phase indicator lamps are arranged on the upper panel, the front face is provided with the indicator lamps, the results of checking the phase sequences at the two sides of the load switch by the nuclear phase indicator can be visually displayed through the on and off of the lamps, when the lamps are on, the phase sequence error is proved, when the lamps are off, the phase sequence is correct, and the back face is provided with the wiring terminals.
The quick plug interface of incoming line end cable is located multi-functional bypass switch cabinet back, and the connector of low pressure flexible cable can be connected through the mode of plug to one end to be equipped with the locking mechanism, prevent to drop after the cable inserts, the other end extends to the cabinet internal portion.
The quick plug interface of the outgoing line end cable is positioned at the back of the multifunctional bypass switch cabinet, one end of the quick plug interface can be connected with a connector of the low-voltage flexible cable in a plug mode, and the quick plug interface is provided with a locking mechanism for preventing the outgoing line end cable from falling off after the cable is inserted, and the other end of the quick plug interface extends to the inside of the cabinet body.
The connecting frame, the copper part and the external brushing insulating paint have good conductivity, can be sleeved on a low-voltage sleeve of a distribution transformer and horizontally rotate by taking the low-voltage sleeve as an axis.
And after the connecting frame is sleeved into the low-voltage sleeve, the low-voltage sleeve clamping bolt is screwed down to enable the connecting frame to clamp the low-voltage sleeve and be tightly connected with the low-voltage sleeve.
A400 volt bypass switch and a using method of a nuclear phase current and voltage monitoring device are characterized in that:
step one: after adjusting proper angles of 4 transition connectors in the complete equipment, an operator installs the transition connectors on a low-voltage sleeve of a transformer, screws a low-voltage sleeve clamping bolt and a low-voltage sleeve clamping nut to enable the transition connectors to be connected with the low-voltage sleeve of the transformer, and then connects one ends of 4 low-voltage flexible cables on the wire inlet side to the transition connectors;
step two: the operator inserts the other ends of the 4 low-voltage flexible cables at the wire inlet side into the corresponding wire inlet end cable quick plug interfaces on the multifunctional bypass switch cabinet in the complete equipment, and the locking mechanism ensures the reliable connection;
step three: an operator inserts one end of 4 low-voltage flexible cables on the outlet side into a corresponding outlet end cable quick plug interface on a multifunctional bypass switch cabinet in the complete device, and a locking mechanism ensures that the cables can be connected by virtue of the locking mechanism, and the other end of the cables is connected to a load side pipeline;
Step four: at the moment, the phase-checking device and the 3 voltmeters in the multifunctional bypass switch cabinet automatically check the phase sequences of the circuits at the two sides of the switch, when the phase sequences at the two sides of the switch are all correct, the 3 nuclear phase indicator lamps are all turned off, the readings of the three-phase voltmeters are 220V, when the phase sequences at the two sides of the load switch are wrong, the nuclear phase indicator lamps of the corresponding phases are turned on, the readings of the voltmeters of the corresponding phases are 380V, and operators can safely and quickly adjust the phase sequences through the quick plugging interfaces of the cable at the wire inlet and outlet ends according to the conditions of the on-off of the nuclear phase indicator lamps and the readings of the voltmeters;
step five: when the phase sequences are all correct, an operator rotates a switch operation handle in a multifunctional bypass switch cabinet in the complete device from a separated position to a combined position, and if the actual bypass phase sequence is wrong due to faults of a voltmeter and a phase checking device, a phase sequence protection relay automatically trips a control phase sequence protection circuit breaker to cut off a bypass loop;
step six: after the bypass normally operates, an operator can judge whether the bypass can be used for reliably shunting a line to be overhauled or not through the reading of the three-phase ammeter in the multifunctional bypass switch cabinet in the complete device, and can check data such as power, electric quantity and the like of the bypass through the multifunctional metering display meter.
Claims (8)
1. 400 volt bypass switch and nuclear phase current voltage monitoring devices, its characterized in that: the 400-volt bypass switch and the nuclear phase current and voltage monitoring device comprise a multifunctional bypass switch cabinet, a transitional connector, a low-voltage flexible cable with a connector, a connector of the low-voltage flexible cable, a cabinet body, an outer cabinet door, an observation window, an air vent, an upper panel, a lower panel, a voltmeter, a three-phase ammeter, a nuclear phase device, a nuclear phase indicator, a multifunctional metering display meter, a switch operating handle, an opening and closing indicator, a load switch, a zero line connecting plate, a phase sequence protection relay, a phase sequence protection circuit breaker, a phase sequence protection fuse, an iron frame, a cable inlet end cable quick plug interface, a cable outlet end cable quick plug interface, a connecting frame, a low-voltage sleeve clamping bolt, a low-voltage sleeve compression nut, an adapter and an adapter clamping bolt;
wherein, the multifunctional bypass switch cabinet is formed by a cabinet body structure of a sheet iron piece; the transition connector is a copper part, is coated with insulating paint, and is a transition connecting device between the low-voltage sleeve of the transformer and the low-voltage flexible cable connector; the cable connector is arranged at two ends of the low-voltage flexible cable with the connector, and the total number of the cable connectors is 8; the connectors of the low-voltage flexible cable are arranged and fixed at two ends of the low-voltage flexible cable and can be quickly connected to the cylinder in a plugging manner; the cabinet body adopts a iron plate, and has enough mechanical strength; the outer box door is movably connected with the box body through a hinge by adopting a sheet iron piece, and one side of the outer box door is provided with a mechanical rotary door lock; the observation window is positioned at the upper part of the outer box door, and an acrylic glass material piece is adopted, so that an operator can check the conditions of the upper panel and the lower panel of the cabinet body under the condition that the outer box door is not opened through the observation window; the air holes are positioned at the lower part of the outer box door, so that the air in and out of the cabinet body can be exchanged, and the moisture in the cabinet body can be removed; the upper panel is movably connected with the cabinet body through a hydraulic stay bar by adopting a iron plate; the lower panel adopts a iron plate, is movably connected with the cabinet body through a hydraulic supporting rod, and is provided with a voltmeter; the three-phase ammeter is arranged on the upper panel, the front side of the electronic instrument can read three-phase current values, and the back side of the electronic instrument is provided with a wiring terminal, so that bypass three-phase current conditions can be measured; the phase checking device is arranged on the upper panel, the front surface can check the state of the phase checking device, and the back surface is provided with a wiring terminal, so that the phase sequence conditions of the two sides of the load switch can be automatically detected; a nuclear phase indicator lamp mounted on the upper panel; the multifunctional metering display meter is arranged on the lower panel, the front surface can check the real-time and historical power and electric quantity of the bypass, and the back surface is provided with a wiring terminal; the switch operating handle is made of an insulating material, the front surface of the switch operating handle is provided with corresponding opening and closing indication boards, an operator controls opening and closing of the load switch by rotating the handle, and the back surface of the switch operating handle is connected with the load switch; the switching-on/off indicator lamps are 2 in number, the front faces are indicator lamps, the switching-on indicator lamps are green, the switching-on indicator lamps are red, the load switch state can be visually displayed through the on/off of the switching-on indicator lamps, and the back faces are provided with wiring terminals; the load switch adopts a low-voltage air switch and can cut off bypass load current; the zero line connecting plate is made of copper and plays a role in connecting a zero line cable of the wire inlet end and the wire outlet end; the phase sequence protection relay can automatically judge whether the bypass phase sequence is correct or not, and can control the opening and closing of the phase sequence protection circuit breaker according to the judging result; the phase sequence protection circuit breaker adopts a normally closed air circuit breaker, and automatically trips when receiving a signal of distinguishing phase sequence errors of the phase sequence protection relay, thereby playing a role of protecting a bypass; the phase sequence protection fuse can prevent the phase sequence protection relay from burning out caused by overcurrent; the iron stand is connected with the cabinet body and is used for fixing the load switch, the zero line connecting plate, the phase sequence protection relay, the phase sequence protection circuit breaker and the phase sequence protection fuse wire on the cabinet body; the cable plays an electric connection role among the fast plug interfaces of the cable at the wire inlet end, the load switch, the zero line connecting plate, the phase sequence protection circuit breaker and the cable at the wire outlet end; the cable fast plug interface of the wire inlet end is positioned at the back of the multifunctional bypass switch cabinet; the cable outlet end quick plug interface is positioned at the back of the multifunctional bypass switch cabinet; a connecting frame, copper parts; the low-voltage sleeve clamps the bolt and the insulating paint is externally brushed; the low-voltage sleeve compresses the nut and is externally brushed with insulating paint; the adapter is a copper product; the adapter clamping bolt is screwed down to clamp the adapter by the connecting frame after the adapter rotates to a proper angle, and the angle of the adapter is fixed and is tightly connected with the connecting frame; the total number of the voltmeters is 3, the voltmeters are arranged on the upper panel, the front side of the mechanical instrument can read voltage values, and the back side of the mechanical instrument is provided with a wiring terminal, so that the three-phase voltage conditions at two ends of the load switch can be measured; the nuclear phase indicator lamps are arranged on the upper panel, the front face is provided with the indicator lamps, the results of checking the phase sequences at the two sides of the load switch by the nuclear phase indicator can be visually displayed through the on and off of the lamps, when the lamps are on, the phase sequence error is proved, when the lamps are off, the phase sequence is correct, and the back face is provided with the wiring terminals.
2. The 400 volt bypass switch and nuclear phase current voltage monitoring device of claim 1 wherein: the quick plug interface of incoming line end cable is located multi-functional bypass switch cabinet back, and the connector of low pressure flexible cable can be connected through the mode of plug to one end to be equipped with the locking mechanism, prevent to drop after the cable inserts, the other end extends to the cabinet internal portion.
3. The 400 volt bypass switch and nuclear phase current voltage monitoring device of claim 1 wherein: the quick plug interface of the outgoing line end cable is positioned at the back of the multifunctional bypass switch cabinet, one end of the quick plug interface can be connected with a connector of the low-voltage flexible cable in a plug mode, and the quick plug interface is provided with a locking mechanism for preventing the outgoing line end cable from falling off after the cable is inserted, and the other end of the quick plug interface extends to the inside of the cabinet body.
4. The 400 volt bypass switch and nuclear phase current voltage monitoring device of claim 1 wherein: the connecting frame, the copper part and the external brushing insulating paint have good conductivity, can be sleeved on a low-voltage sleeve of a distribution transformer and horizontally rotate by taking the low-voltage sleeve as an axis.
5. The 400 volt bypass switch and nuclear phase current voltage monitoring device of claim 1 wherein: and after the connecting frame is sleeved into the low-voltage sleeve, the low-voltage sleeve clamping bolt is screwed down to enable the connecting frame to clamp the low-voltage sleeve and be tightly connected with the low-voltage sleeve.
6. The 400 volt bypass switch and nuclear phase current voltage monitoring device of claim 1 wherein: the low-voltage sleeve pressing nut is externally brushed with insulating paint, and is arranged on a bolt exposed out of the low-voltage sleeve after the connecting frame is sleeved into the low-voltage sleeve and presses the connecting frame to prevent the connecting frame from falling off from the low-voltage sleeve.
7. The 400 volt bypass switch and nuclear phase current voltage monitoring device of claim 1 wherein: the adapter is made of copper, is externally painted with insulating paint, has good conductivity, one end of the adapter is arranged on the connecting frame, and the other end of the adapter can rotate in the vertical direction by 360 degrees after being bent by 90 degrees and can be connected with the connector of the low-voltage cable.
8. A method of using the 400 volt bypass switch and the nuclear phase current voltage monitoring device of claim 1, wherein:
step one: after adjusting proper angles of 4 transition connectors in the complete equipment, an operator installs the transition connectors on a low-voltage sleeve of a transformer, screws a low-voltage sleeve clamping bolt and a low-voltage sleeve clamping nut to enable the transition connectors to be connected with the low-voltage sleeve of the transformer, and then connects one ends of 4 low-voltage flexible cables on the wire inlet side to the transition connectors;
Step two: the operator inserts the other ends of the 4 low-voltage flexible cables at the wire inlet side into the corresponding wire inlet end cable quick plug interfaces on the multifunctional bypass switch cabinet in the complete equipment, and the locking mechanism ensures the reliable connection;
step three: an operator inserts one end of 4 low-voltage flexible cables on the outlet side into a corresponding outlet end cable quick plug interface on a multifunctional bypass switch cabinet in the complete device, and a locking mechanism ensures that the cables can be connected by virtue of the locking mechanism, and the other end of the cables is connected to a load side pipeline;
step four: at the moment, the phase-checking device and the 3 voltmeters in the multifunctional bypass switch cabinet automatically check the phase sequences of the circuits at the two sides of the switch, when the phase sequences at the two sides of the switch are all correct, the 3 nuclear phase indicator lamps are all turned off, the readings of the three-phase voltmeters are 220V, when the phase sequences at the two sides of the load switch are wrong, the nuclear phase indicator lamps of the corresponding phases are turned on, the readings of the voltmeters of the corresponding phases are 380V, and operators can safely and quickly adjust the phase sequences through the quick plugging interfaces of the cable at the wire inlet and outlet ends according to the conditions of the on-off of the nuclear phase indicator lamps and the readings of the voltmeters;
step five: when the phase sequences are all correct, an operator rotates a switch operation handle in a multifunctional bypass switch cabinet in the complete device from a separated position to a combined position, and if the actual bypass phase sequence is wrong due to faults of a voltmeter and a phase checking device, a phase sequence protection relay automatically trips a control phase sequence protection circuit breaker to cut off a bypass loop;
Step six: after the bypass normally operates, an operator can judge whether the bypass can be used for reliably shunting a line to be overhauled or not through the reading of the three-phase ammeter in the multifunctional bypass switch cabinet in the complete device, and can also check the power and electric quantity data of the bypass through the multifunctional metering display meter.
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