CN111864559A - 400-volt bypass switch, nuclear phase current and voltage monitoring device and using method - Google Patents

Abstract

The system comprises a 400-volt bypass switch and a nuclear phase current and voltage monitoring device, wherein the multifunctional bypass switch cabinet is of a cabinet body structure of iron plates; the connectors of the low-voltage flexible cable are installed and fixed at two ends of the low-voltage flexible cable and can be quickly connected to cylinders such as a screw rod and the like in a plugging mode; the voltmeter, the three-phase ammeter and the phase checking device are installed on the upper panel. The use method of the 400V bypass switch and the nuclear phase current and voltage monitoring device comprises the steps of inserting the other ends of 4 low-voltage flexible cables at the wire inlet side into corresponding quick plugging interfaces of wire inlet end cables on a multifunctional bypass switch cabinet in the complete device; after the bypass normally runs, whether the bypass is used for treating the line to be overhauled or not can be shunted is judged through the reading of a three-phase ammeter in the multifunctional bypass switch cabinet in the complete device. The invention has the advantages that: personal safety is guaranteed, the bypass phase sequence can be checked and adjusted conveniently and quickly, and operation efficiency and safety are improved.

Description

400-volt bypass switch, nuclear phase current and voltage monitoring device and using method

Technical Field

The invention relates to the technical field of electric 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 economic society, the requirement of power consumers on the reliability of power supply is higher and higher, and uninterrupted operation is one of the important measures for improving the reliability of power supply. In the uninterrupted operation, the 0.4 kv uninterrupted operation adopting the bypass operation method accounts for a considerable proportion, and the operators usually adopt a common low-voltage air switch as a bypass switch, so that the bypass current and voltage conditions cannot be monitored in real time, the phase sequence at two sides of the switch cannot be checked quickly, and the operation preparation time is long. Because the operating personnel directly operate the on-off of the bypass switch, when the bypass switch is insulated or the machinery breaks down, the operating personnel are easily injured. Meanwhile, the low-voltage sleeve of the transformer is short in length, equipment around the low-voltage sleeve is densely arranged, and the operation environment is complex, so that 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 kV uninterrupted power operation by a bypass operation method, quickly check phase sequences on two sides of a bypass switch reliably, improve operation efficiency, and simultaneously install a connector of a bypass cable on a low-voltage sleeve of a transformer safely and reliably, so that operation safety is improved.

The invention provides a 400V bypass switch and a nuclear phase current and voltage monitoring device, which are characterized in that: the 400-volt bypass switch and nuclear phase current and voltage monitoring device comprises a multifunctional bypass switch cabinet, a transition connector, a low-voltage flexible cable with a connector, a connector of the low-voltage flexible cable, a cabinet body, an outer box door, an observation window, an air hole, an upper panel, a lower panel, a voltmeter, a three-phase ammeter, a nuclear phase device, a nuclear phase indicator lamp, a multifunctional metering display meter, a switch operating handle, a switch-off and switch-on indicator lamp, 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 plugging interface, a cable outlet end cable quick plugging interface, a connecting frame, a low-voltage sleeve clamping bolt, a low-voltage sleeve compression nut, an adapter and an adapter clamping bolt;

the multifunctional bypass switch cabinet is of a cabinet body structure of iron plates; the transition connector is a copper product, is coated with insulating paint on the outer surface and is a transition connecting device between a low-voltage sleeve of the transformer and a low-voltage flexible cable connector; the two ends of the low-voltage flexible cable with the connectors and the copper core cable are provided with cable connectors which are 8 in total; the connectors of the low-voltage flexible cable are installed and fixed at two ends of the low-voltage flexible cable and can be quickly connected to cylinders such as a screw rod and the like in a plugging mode; the cabinet body is made of iron plates and has enough mechanical strength; the outer box door is made of an iron plate and is movably connected with the box body through a hinge, and a mechanical rotating door lock is arranged on one side of the outer box door; the observation window is positioned at the upper part of the outer box door and is made of acrylic glass, so that an operator can check the conditions of the upper panel and the lower panel of the cabinet body through the observation window under the condition that the outer box door is not opened; the air holes are positioned at the lower part of the outer box door, so that the air inside and outside the cabinet body can be exchanged, and the moisture in the cabinet body can be removed; the upper panel is made of an iron plate and is movably connected with the cabinet body through a hydraulic support rod; the lower panel is made of iron plates and is movably connected with the cabinet body through a hydraulic support rod, and the voltmeter is installed on the upper panel; the three-phase ammeter is arranged on the upper panel, and the electronic instrument has the advantages that the front side can read the three-phase current value, and the back side is provided with a wiring terminal which can measure the three-phase current condition of the bypass; the phase detector is arranged on the upper panel, the state of the phase detector can be checked on the front side, and the wiring terminal is arranged on the back side and can automatically detect the phase sequence conditions on the two sides of the load switch; the nuclear phase indicator light is arranged on the upper panel; the multifunctional metering display meter is arranged on the lower panel, the front side of the multifunctional metering display meter can be used for checking the real-time and historical power and electric quantity of the bypass, and the back side of the multifunctional metering display meter is provided with a wiring terminal; the switch operating handle is made of an insulating material, the operating handle is arranged on the front side, corresponding switch-on and switch-off indicating boards are arranged on the front side, an operator controls the switch-on and switch-off of the load switch by rotating the handle, and the back side of the switch operating handle is connected with the load switch; the number of the switching-off indicating lamps and the number of the switching-on indicating lamps are 2, the indicating lamps are arranged on the front sides, the switching-off indicating lamps are green, the switching-on indicating lamps are red, the state of a load switch can be visually displayed by the on and off of the switching-off indicating lamps, and the wiring terminals are arranged on the back sides; the load switch adopts a low-voltage air switch and can cut off the bypass load current; the zero line connecting plate is made of copper and has the function of connecting a wire inlet end with a zero line cable of a wire outlet end; the phase sequence protection relay can automatically judge whether the bypass phase sequence is correct or not and can control the on-off of the phase sequence protection circuit breaker according to a judgment result; the phase sequence protection circuit breaker adopts a normally closed air circuit breaker, and automatically trips when a signal for judging a phase sequence error of a phase sequence protection relay is received, so that a bypass is protected; the phase sequence protection fuse wire can prevent the phase sequence protection relay from being burnt due to overcurrent; the iron stand is connected with the cabinet body and fixes 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 on the cabinet body; the cable plays an electrical connection role among the inlet end cable quick plugging interface, the load switch, the zero line connecting plate, the phase sequence protection circuit breaker and the outlet end cable quick plugging interface; the inlet end cable quick plugging interface is positioned on the back surface of the multifunctional bypass switch cabinet; the outlet end cable quick plugging interface is positioned on the back of the multifunctional bypass switch cabinet; a connecting frame made of copper; clamping the bolt by the low-voltage sleeve, and brushing insulating paint outside; the low-voltage sleeve compresses the nut and is externally brushed with insulating paint; the adapter is a copper part; the adapter presss from both sides tight bolt, brushes insulating varnish outward, after the adapter is rotatory to suitable angle, screws up the adapter and presss from both sides tight bolt and makes the link press from both sides tight adapter, and the adapter angle is fixed this moment, and closely links to each other with the link.

The voltmeter is provided with 3 pieces, and is arranged on the upper panel, the front side of the mechanical instrument can read the voltage value, and the back side of the mechanical instrument is provided with a wiring terminal which can measure the three-phase voltage conditions at two ends of the load switch.

The nuclear phase indicating lamps are 3 in number, are mounted on the upper panel, the indicating lamps are arranged on the front side, the result of checking the phase sequence of the nuclear phase device on the two sides of the load switch can be visually displayed by turning on and off the lamps, when the lamps are turned on, the phase sequence is proved to be wrong, when the lamps are turned off, the phase sequence is proved to be correct, and the back side is provided with wiring terminals.

The quick plug interface of inlet wire end cable, be located the multi-functional bypass switch cabinet back, the connector of low pressure flexible cable can be connected through the mode of plug to one end to be equipped with locking mechanism, prevent to drop after the cable inserts, the other end extends to cabinet internal portion.

The quick plug interface of leading-out terminal cable, be located the multi-functional bypass switch cabinet back, the connector of low pressure flexible cable can be connected through the mode of plug to one end to be equipped with locking mechanism, prevent to drop after the cable inserts, the other end extends to cabinet internal portion.

The connecting frame, the copper part, brush insulating varnish outward, have good electric conductivity, can overlap on distribution transformer's low-voltage bushing and use low-voltage bushing as the horizontal rotation of axle.

The low-voltage sleeve clamping bolt is externally brushed with insulating paint, and after the connecting frame is sleeved into the low-voltage sleeve, the connecting frame is tightly screwed to clamp the low-voltage sleeve and is tightly connected with the low-voltage sleeve.

The low-voltage sleeve gland nut is externally brushed with insulating paint, and after the connecting frame is sleeved into the low-voltage sleeve, the low-voltage sleeve gland nut is installed on a bolt exposed out of the low-voltage sleeve and tightly presses the connecting frame to prevent the connecting frame from falling off from the low-voltage sleeve.

The adapter, copper, brush insulating varnish outward, have good electric conductivity, one end is installed on the link, the other end can be 360 degrees rotations in the vertical direction after buckling 90 degrees to can be connected with low tension cable's connector.

A400V bypass switch and a method for using a nuclear phase current and voltage monitoring device are characterized in that:

the method comprises the following steps: an operator adjusts the proper angles of the 4 transition connectors in the complete equipment, installs the transition connectors on the low-voltage sleeve of the transformer, screws down the low-voltage sleeve clamping bolts and the low-voltage sleeve clamping nuts to ensure that the transition connectors can be connected with the low-voltage sleeve of the transformer, and then connects one ends of the 4 low-voltage flexible cables on the incoming line side to the transition connectors;

Step two: the other ends of the 4 low-voltage flexible cables at the wire inlet side are inserted into corresponding wire inlet end cable quick plugging interfaces on the multifunctional bypass switch cabinet in the complete device by an operator, and a locking mechanism ensures that the cables can be connected reliably;

step three: an operator inserts one end of 4 low-voltage flexible cables at the outgoing line side into a corresponding outgoing line end cable quick plugging interface on the multifunctional bypass switch cabinet in the complete device, and a locking mechanism ensures that the cables can be connected reliably, and the other end of the cables is connected to a load side line;

step four: at the moment, the phase sequence checking work is automatically carried out on the circuits on two sides of the switch by the phase checker and the 3 voltmeters in the multifunctional bypass switch cabinet in the complete set of equipment, when the phase sequences on two sides of the switch are all correct, the 3 phase checking indicator lamps are completely turned off, the readings of the three-phase voltmeters are all 220V, when one phase sequence on two sides of the load switch is wrong, the phase checking indicator lamp of the corresponding phase is turned on, the reading of the voltmeter of the corresponding phase is 380V, and an operator can safely and quickly adjust the phase sequence through the cable quick plugging and unplugging interfaces of the inlet and outlet terminals according to the conditions of the turning on and turning off of the phase checking indicator lamps and the reading;

step five: when the phase sequence is all correct, an operator rotates a switch operation handle in the multifunctional bypass switch cabinet in the complete equipment from a separated position to a closed position, and at the moment, if the actual phase sequence of a bypass is wrong due to faults of a voltmeter and a phase checker, a phase sequence protection relay controls a phase sequence protection circuit breaker to automatically trip, and a bypass loop is cut off;

Step six: after the bypass normally operates, the operating personnel can judge through the three-phase ampere meter reading in the multi-functional bypass switch cabinet among this integrated equipment whether the bypass has been treated and overhauld the circuit and can lean on the reposition of redundant personnel, can also look over data such as power, the electric quantity of bypass through multi-functional measurement display meter.

The invention has the advantages that: the multifunctional bypass switch cabinet can cut off the load current and the fault current of a low-voltage line, and the requirement of the insulation grade is met; the multifunctional bypass switch cabinet has an automatic phase checking function, the work preparation time is effectively shortened, the phase sequence checking result is conveniently and visually checked through the reading of the indicating lamp and the voltmeter, the reliable phase sequence protection can still be carried out on the bypass through the matching of the phase sequence protection relay and the phase sequence protection circuit breaker even if the phase checker and the voltmeter are out of order simultaneously, unnecessary fault power failure is avoided, the phase sequence is checked through three non-identical principles and non-homologous methods, and the accuracy of the checking result is high; the multifunctional bypass switch cabinet can realize quick plug connection of a low-voltage flexible cable, is convenient to adjust a phase sequence when the phase sequence is wrong, and meanwhile, the quick plug interfaces of the cables at the wire inlet end and the wire outlet end are provided with locking mechanisms, so that the cables can be prevented from falling off after being connected, and the connection can be reliable; the multifunctional bypass switch cabinet can monitor the bypass current and voltage conditions in real time, visually know the bypass running state and the bypass shunting condition, and can also transfer the bypass power, electric quantity real-time and historical data, so that operators can conveniently count, analyze and evaluate the work afterwards; the upper panel and the lower panel of the multifunctional bypass switch cabinet have sufficient mechanical strength, and the switch operating handle has corresponding insulation strength, so that when the load switch leaks electricity or explodes due to faults, operators can be effectively protected; the transition connector is tightly connected to the low-voltage sleeve of the transformer in a double fastening mode of a low-voltage sleeve clamping bolt and a low-voltage sleeve compression nut on the transition connector, and the connection is firm and reliable; insulating paint is coated outside the transition connector, so that safety guarantee is provided for uninterrupted operation; the connector of the transition connector is designed according to the characteristics of the installation 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 in the low-voltage sleeve of the distribution transformer, the installation angle of the connector of the low-voltage flexible cable can be flexibly adjusted at the dense position of equipment where the low-voltage sleeve of the transformer is located, and installation and operation of operators are facilitated;

Can make low pressure flexible cable connector and transformer low pressure sleeve pipe can lean on being connected through transition connector, avoid the risk of droing, ensure the safety of operation.

In conclusion, the 400-volt bypass switch and the nuclear phase current and voltage monitoring device isolate an operator from an electric loop, ensure personal safety, conveniently and quickly check and adjust the bypass phase sequence, have triple phase sequence checking and protecting functions, are safe and accurate in checking result, can visually check data such as bypass current and voltage, are convenient for the operator to know the real-time state of the bypass and analyze and evaluate the bypass afterwards, effectively solve the problem that a connector of a low-voltage flexible cable cannot be installed on a low-voltage sleeve of a transformer, and improve the efficiency and the safety of operation.

Drawings

The invention is described in further detail below with reference to the following figures 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 body after the outer box door of the multifunctional bypass switch cabinet is opened;

FIG. 4 is a schematic view of the interior of the multifunctional bypass switch cabinet after the upper and lower panels thereof are opened;

FIG. 5 is a schematic view of the back of the multifunctional bypass switch cabinet;

FIG. 6 is a schematic view of a transition connector;

in the figure, 1 is a multifunctional bypass switch cabinet, 2 is a transition connector, 3 is a low-voltage flexible cable with a connector, 4 is the connector of the low-voltage flexible cable, 5 is a cabinet body, 6 is an outer box door, 7 is an observation window, 8 is a vent hole, 9 is an upper panel, 10 is a lower panel, 11 is a voltmeter, 12 is a three-phase ammeter, 13 is a phase checking device, 14 is a phase checking indicator lamp, 15 is a multifunctional metering display meter, 16 is a switch operating handle, 17 is a switch-off and switch-on indicator lamp, 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 wire, 23 is an iron frame, 24 is a cable, 25 is a cable quick plug interface of a cable at a wire inlet end, 26 is a cable quick plug interface at a wire outlet end, 27 is a connecting frame, 28 is a low-voltage sleeve clamping bolt, 29 is a low-voltage sleeve compression nut, and 31 is an adapter clamping bolt.

Detailed Description

Example 1

The invention provides a 400V bypass switch and a nuclear phase current and voltage monitoring device, which are characterized in that: the 400-volt bypass switch and nuclear phase current and voltage monitoring device comprises a multifunctional bypass switch cabinet, a transition connector, a low-voltage flexible cable with a connector, a connector of the low-voltage flexible cable, a cabinet body, an outer box door, an observation window, an air hole, an upper panel, a lower panel, a voltmeter, a three-phase ammeter, a nuclear phase device, a nuclear phase indicator lamp, a multifunctional metering display meter, a switch operating handle, a switch-off and switch-on indicator lamp, 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 plugging interface, a cable outlet end cable quick plugging interface, a connecting frame, a low-voltage sleeve clamping bolt, a low-voltage sleeve compression nut, an adapter and an adapter clamping bolt;

The multifunctional bypass switch cabinet is of a cabinet body structure of iron plates; the transition connector is a copper product, is coated with insulating paint on the outer surface and is a transition connecting device between a low-voltage sleeve of the transformer and a low-voltage flexible cable connector; the two ends of the low-voltage flexible cable with the connectors and the copper core cable are provided with cable connectors which are 8 in total; the connectors of the low-voltage flexible cable are installed and fixed at two ends of the low-voltage flexible cable and can be quickly connected to cylinders such as a screw rod and the like in a plugging mode; the cabinet body is made of iron plates and has enough mechanical strength; the outer box door is made of an iron plate and is movably connected with the box body through a hinge, and a mechanical rotating door lock is arranged on one side of the outer box door; the observation window is positioned at the upper part of the outer box door and is made of acrylic glass, so that an operator can check the conditions of the upper panel and the lower panel of the cabinet body through the observation window under the condition that the outer box door is not opened; the air holes are positioned at the lower part of the outer box door, so that the air inside and outside the cabinet body can be exchanged, and the moisture in the cabinet body can be removed; the upper panel is made of an iron plate and is movably connected with the cabinet body through a hydraulic support rod; the lower panel is made of iron plates and is movably connected with the cabinet body through a hydraulic support rod, and the voltmeter is installed on the upper panel; the three-phase ammeter is arranged on the upper panel, and the electronic instrument has the advantages that the front side can read the three-phase current value, and the back side is provided with a wiring terminal which can measure the three-phase current condition of the bypass; the phase detector is arranged on the upper panel, the state of the phase detector can be checked on the front side, and the wiring terminal is arranged on the back side and can automatically detect the phase sequence conditions on the two sides of the load switch; the nuclear phase indicator light is arranged on the upper panel; the multifunctional metering display meter is arranged on the lower panel, the front side of the multifunctional metering display meter can be used for checking the real-time and historical power and electric quantity of the bypass, and the back side of the multifunctional metering display meter is provided with a wiring terminal; the switch operating handle is made of an insulating material, the operating handle is arranged on the front side, corresponding switch-on and switch-off indicating boards are arranged on the front side, an operator controls the switch-on and switch-off of the load switch by rotating the handle, and the back side of the switch operating handle is connected with the load switch; the number of the switching-off indicating lamps and the number of the switching-on indicating lamps are 2, the indicating lamps are arranged on the front sides, the switching-off indicating lamps are green, the switching-on indicating lamps are red, the state of a load switch can be visually displayed by the on and off of the switching-off indicating lamps, and the wiring terminals are arranged on the back sides; the load switch adopts a low-voltage air switch and can cut off the bypass load current; the zero line connecting plate is made of copper and has the function of connecting a wire inlet end with a zero line cable of a wire outlet end; the phase sequence protection relay can automatically judge whether the bypass phase sequence is correct or not and can control the on-off of the phase sequence protection circuit breaker according to a judgment result; the phase sequence protection circuit breaker adopts a normally closed air circuit breaker, and automatically trips when a signal for judging a phase sequence error of a phase sequence protection relay is received, so that a bypass is protected; the phase sequence protection fuse wire can prevent the phase sequence protection relay from being burnt due to overcurrent; the iron stand is connected with the cabinet body and fixes 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 on the cabinet body; the cable plays an electrical connection role among the inlet end cable quick plugging interface, the load switch, the zero line connecting plate, the phase sequence protection circuit breaker and the outlet end cable quick plugging interface; the inlet end cable quick plugging interface is positioned on the back surface of the multifunctional bypass switch cabinet; the outlet end cable quick plugging interface is positioned on the back of the multifunctional bypass switch cabinet; a connecting frame made of copper; clamping the bolt by the low-voltage sleeve, and brushing insulating paint outside; the low-voltage sleeve compresses the nut and is externally brushed with insulating paint; the adapter is a copper part; the adapter presss from both sides tight bolt, brushes insulating varnish outward, after the adapter is rotatory to suitable angle, screws up the adapter and presss from both sides tight bolt and makes the link press from both sides tight adapter, and the adapter angle is fixed this moment, and closely links to each other with the link.

The voltmeter is provided with 3 pieces, and is arranged on the upper panel, the front side of the mechanical instrument can read the voltage value, and the back side of the mechanical instrument is provided with a wiring terminal which can measure the three-phase voltage conditions at two ends of the load switch.

The nuclear phase indicating lamps are 3 in number, are mounted on the upper panel, the indicating lamps are arranged on the front side, the result of checking the phase sequence of the nuclear phase device on the two sides of the load switch can be visually displayed by turning on and off the lamps, when the lamps are turned on, the phase sequence is proved to be wrong, when the lamps are turned off, the phase sequence is proved to be correct, and the back side is provided with wiring terminals.

The quick plug interface of inlet wire end cable, be located the multi-functional bypass switch cabinet back, the connector of low pressure flexible cable can be connected through the mode of plug to one end to be equipped with locking mechanism, prevent to drop after the cable inserts, the other end extends to cabinet internal portion.

The quick plug interface of leading-out terminal cable, be located the multi-functional bypass switch cabinet back, the connector of low pressure flexible cable can be connected through the mode of plug to one end to be equipped with locking mechanism, prevent to drop after the cable inserts, the other end extends to cabinet internal portion.

The connecting frame, the copper part, brush insulating varnish outward, have good electric conductivity, can overlap on distribution transformer's low-voltage bushing and use low-voltage bushing as the horizontal rotation of axle.

The low-voltage sleeve clamping bolt is externally brushed with insulating paint, and after the connecting frame is sleeved into the low-voltage sleeve, the connecting frame is tightly screwed to clamp the low-voltage sleeve and is tightly connected with the low-voltage sleeve.

The low-voltage sleeve gland nut is externally brushed with insulating paint, and after the connecting frame is sleeved into the low-voltage sleeve, the low-voltage sleeve gland nut is installed on a bolt exposed out of the low-voltage sleeve and tightly presses the connecting frame to prevent the connecting frame from falling off from the low-voltage sleeve.

The adapter, copper, brush insulating varnish outward, have good electric conductivity, one end is installed on the link, the other end can be 360 degrees rotations in the vertical direction after buckling 90 degrees to can be connected with low tension cable's connector.

A400V bypass switch and a method for using a nuclear phase current and voltage monitoring device are characterized in that:

the method comprises the following steps: an operator adjusts the proper angles of the 4 transition connectors in the complete equipment, installs the transition connectors on the low-voltage sleeve of the transformer, screws down the low-voltage sleeve clamping bolts and the low-voltage sleeve clamping nuts to ensure that the transition connectors can be connected with the low-voltage sleeve of the transformer, and then connects one ends of the 4 low-voltage flexible cables on the incoming line side to the transition connectors;

Step two: the other ends of the 4 low-voltage flexible cables at the wire inlet side are inserted into corresponding wire inlet end cable quick plugging interfaces on the multifunctional bypass switch cabinet in the complete device by an operator, and a locking mechanism ensures that the cables can be connected reliably;

step three: an operator inserts one end of 4 low-voltage flexible cables at the outgoing line side into a corresponding outgoing line end cable quick plugging interface on the multifunctional bypass switch cabinet in the complete device, and a locking mechanism ensures that the cables can be connected reliably, and the other end of the cables is connected to a load side line;

step four: at the moment, the phase sequence checking work is automatically carried out on the circuits on two sides of the switch by the phase checker and the 3 voltmeters in the multifunctional bypass switch cabinet in the complete set of equipment, when the phase sequences on two sides of the switch are all correct, the 3 phase checking indicator lamps are completely turned off, the readings of the three-phase voltmeters are all 220V, when one phase sequence on two sides of the load switch is wrong, the phase checking indicator lamp of the corresponding phase is turned on, the reading of the voltmeter of the corresponding phase is 380V, and an operator can safely and quickly adjust the phase sequence through the cable quick plugging and unplugging interfaces of the inlet and outlet terminals according to the conditions of the turning on and turning off of the phase checking indicator lamps and the reading;

step five: when the phase sequence is all correct, an operator rotates a switch operation handle in the multifunctional bypass switch cabinet in the complete equipment from a separated position to a closed position, and at the moment, if the actual phase sequence of a bypass is wrong due to faults of a voltmeter and a phase checker, a phase sequence protection relay controls a phase sequence protection circuit breaker to automatically trip, and a bypass loop is cut off;

Step six: after the bypass normally operates, the operating personnel can judge through the three-phase ampere meter reading in the multi-functional bypass switch cabinet among this integrated equipment whether the bypass has been treated and overhauld the circuit and can lean on the reposition of redundant personnel, can also look over data such as power, the electric quantity of bypass through multi-functional measurement display meter.

Example 2

The invention provides a 400V bypass switch and a nuclear phase current and voltage monitoring device, which are characterized in that: the 400-volt bypass switch and nuclear phase current and voltage monitoring device comprises a multifunctional bypass switch cabinet, a transition connector, a low-voltage flexible cable with a connector, a connector of the low-voltage flexible cable, a cabinet body, an outer box door, an observation window, an air hole, an upper panel, a lower panel, a voltmeter, a three-phase ammeter, a nuclear phase device, a nuclear phase indicator lamp, a multifunctional metering display meter, a switch operating handle, a switch-off and switch-on indicator lamp, 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 plugging interface, a cable outlet end cable quick plugging interface, a connecting frame, a low-voltage sleeve clamping bolt, a low-voltage sleeve compression nut, an adapter and an adapter clamping bolt;

The multifunctional bypass switch cabinet is of a cabinet body structure of iron plates; the transition connector is a copper product, is coated with insulating paint on the outer surface and is a transition connecting device between a low-voltage sleeve of the transformer and a low-voltage flexible cable connector; the two ends of the low-voltage flexible cable with the connectors and the copper core cable are provided with cable connectors which are 8 in total; the connectors of the low-voltage flexible cable are installed and fixed at two ends of the low-voltage flexible cable and can be quickly connected to cylinders such as a screw rod and the like in a plugging mode; the cabinet body is made of iron plates and has enough mechanical strength; the outer box door is made of an iron plate and is movably connected with the box body through a hinge, and a mechanical rotating door lock is arranged on one side of the outer box door; the observation window is positioned at the upper part of the outer box door and is made of acrylic glass, so that an operator can check the conditions of the upper panel and the lower panel of the cabinet body through the observation window under the condition that the outer box door is not opened; the air holes are positioned at the lower part of the outer box door, so that the air inside and outside the cabinet body can be exchanged, and the moisture in the cabinet body can be removed; the upper panel is made of an iron plate and is movably connected with the cabinet body through a hydraulic support rod; the lower panel is made of iron plates and is movably connected with the cabinet body through a hydraulic support rod, and the voltmeter is installed on the upper panel; the three-phase ammeter is arranged on the upper panel, and the electronic instrument has the advantages that the front side can read the three-phase current value, and the back side is provided with a wiring terminal which can measure the three-phase current condition of the bypass; the phase detector is arranged on the upper panel, the state of the phase detector can be checked on the front side, and the wiring terminal is arranged on the back side and can automatically detect the phase sequence conditions on the two sides of the load switch; the nuclear phase indicator light is arranged on the upper panel; the multifunctional metering display meter is arranged on the lower panel, the front side of the multifunctional metering display meter can be used for checking the real-time and historical power and electric quantity of the bypass, and the back side of the multifunctional metering display meter is provided with a wiring terminal; the switch operating handle is made of an insulating material, the operating handle is arranged on the front side, corresponding switch-on and switch-off indicating boards are arranged on the front side, an operator controls the switch-on and switch-off of the load switch by rotating the handle, and the back side of the switch operating handle is connected with the load switch; the number of the switching-off indicating lamps and the number of the switching-on indicating lamps are 2, the indicating lamps are arranged on the front sides, the switching-off indicating lamps are green, the switching-on indicating lamps are red, the state of a load switch can be visually displayed by the on and off of the switching-off indicating lamps, and the wiring terminals are arranged on the back sides; the load switch adopts a low-voltage air switch and can cut off the bypass load current; the zero line connecting plate is made of copper and has the function of connecting a wire inlet end with a zero line cable of a wire outlet end; the phase sequence protection relay can automatically judge whether the bypass phase sequence is correct or not and can control the on-off of the phase sequence protection circuit breaker according to a judgment result; the phase sequence protection circuit breaker adopts a normally closed air circuit breaker, and automatically trips when a signal for judging a phase sequence error of a phase sequence protection relay is received, so that a bypass is protected; the phase sequence protection fuse wire can prevent the phase sequence protection relay from being burnt due to overcurrent; the iron stand is connected with the cabinet body and fixes 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 on the cabinet body; the cable plays an electrical connection role among the inlet end cable quick plugging interface, the load switch, the zero line connecting plate, the phase sequence protection circuit breaker and the outlet end cable quick plugging interface; the inlet end cable quick plugging interface is positioned on the back surface of the multifunctional bypass switch cabinet; the outlet end cable quick plugging interface is positioned on the back of the multifunctional bypass switch cabinet; a connecting frame made of copper; clamping the bolt by the low-voltage sleeve, and brushing insulating paint outside; the low-voltage sleeve compresses the nut and is externally brushed with insulating paint; the adapter is a copper part; the adapter presss from both sides tight bolt, brushes insulating varnish outward, after the adapter is rotatory to suitable angle, screws up the adapter and presss from both sides tight bolt and makes the link press from both sides tight adapter, and the adapter angle is fixed this moment, and closely links to each other with the link.

The voltmeter is provided with 3 pieces, and is arranged on the upper panel, the front side of the mechanical instrument can read the voltage value, and the back side of the mechanical instrument is provided with a wiring terminal which can measure the three-phase voltage conditions at two ends of the load switch.

The nuclear phase indicating lamps are 3 in number, are mounted on the upper panel, the indicating lamps are arranged on the front side, the result of checking the phase sequence of the nuclear phase device on the two sides of the load switch can be visually displayed by turning on and off the lamps, when the lamps are turned on, the phase sequence is proved to be wrong, when the lamps are turned off, the phase sequence is proved to be correct, and the back side is provided with wiring terminals.

The low-voltage sleeve clamping bolt is externally brushed with insulating paint, and after the connecting frame is sleeved into the low-voltage sleeve, the connecting frame is tightly screwed to clamp the low-voltage sleeve and is tightly connected with the low-voltage sleeve.

The low-voltage sleeve gland nut is externally brushed with insulating paint, and after the connecting frame is sleeved into the low-voltage sleeve, the low-voltage sleeve gland nut is installed on a bolt exposed out of the low-voltage sleeve and tightly presses the connecting frame to prevent the connecting frame from falling off from the low-voltage sleeve.

The adapter, copper, brush insulating varnish outward, have good electric conductivity, one end is installed on the link, the other end can be 360 degrees rotations in the vertical direction after buckling 90 degrees to can be connected with low tension cable's connector.

A400V bypass switch and a method for using a nuclear phase current and voltage monitoring device are characterized in that:

the method comprises the following steps: an operator adjusts the proper angles of the 4 transition connectors in the complete equipment, installs the transition connectors on the low-voltage sleeve of the transformer, screws down the low-voltage sleeve clamping bolts and the low-voltage sleeve clamping nuts to ensure that the transition connectors can be connected with the low-voltage sleeve of the transformer, and then connects one ends of the 4 low-voltage flexible cables on the incoming line side to the transition connectors;

step two: the other ends of the 4 low-voltage flexible cables at the wire inlet side are inserted into corresponding wire inlet end cable quick plugging interfaces on the multifunctional bypass switch cabinet in the complete device by an operator, and a locking mechanism ensures that the cables can be connected reliably;

step three: an operator inserts one end of 4 low-voltage flexible cables at the outgoing line side into a corresponding outgoing line end cable quick plugging interface on the multifunctional bypass switch cabinet in the complete device, and a locking mechanism ensures that the cables can be connected reliably, and the other end of the cables is connected to a load side line;

step four: at the moment, the phase sequence checking work is automatically carried out on the circuits on two sides of the switch by the phase checker and the 3 voltmeters in the multifunctional bypass switch cabinet in the complete set of equipment, when the phase sequences on two sides of the switch are all correct, the 3 phase checking indicator lamps are completely turned off, the readings of the three-phase voltmeters are all 220V, when one phase sequence on two sides of the load switch is wrong, the phase checking indicator lamp of the corresponding phase is turned on, the reading of the voltmeter of the corresponding phase is 380V, and an operator can safely and quickly adjust the phase sequence through the cable quick plugging and unplugging interfaces of the inlet and outlet terminals according to the conditions of the turning on and turning off of the phase checking indicator lamps and the reading;

Step five: when the phase sequence is all correct, an operator rotates a switch operation handle in the multifunctional bypass switch cabinet in the complete equipment from a separated position to a closed position, and at the moment, if the actual phase sequence of a bypass is wrong due to faults of a voltmeter and a phase checker, a phase sequence protection relay controls a phase sequence protection circuit breaker to automatically trip, and a bypass loop is cut off;

step six: after the bypass normally operates, the operating personnel can judge through the three-phase ampere meter reading in the multi-functional bypass switch cabinet among this integrated equipment whether the bypass has been treated and overhauld the circuit and can lean on the reposition of redundant personnel, can also look over data such as power, the electric quantity of bypass through multi-functional measurement display meter.

Example 3

The invention provides a 400V bypass switch and a nuclear phase current and voltage monitoring device, which are characterized in that: the 400-volt bypass switch and nuclear phase current and voltage monitoring device comprises a multifunctional bypass switch cabinet, a transition connector, a low-voltage flexible cable with a connector, a connector of the low-voltage flexible cable, a cabinet body, an outer box door, an observation window, an air hole, an upper panel, a lower panel, a voltmeter, a three-phase ammeter, a nuclear phase device, a nuclear phase indicator lamp, a multifunctional metering display meter, a switch operating handle, a switch-off and switch-on indicator lamp, 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 plugging interface, a cable outlet end cable quick plugging interface, a connecting frame, a low-voltage sleeve clamping bolt, a low-voltage sleeve compression nut, an adapter and an adapter clamping bolt;

The multifunctional bypass switch cabinet is of a cabinet body structure of iron plates; the transition connector is a copper product, is coated with insulating paint on the outer surface and is a transition connecting device between a low-voltage sleeve of the transformer and a low-voltage flexible cable connector; the two ends of the low-voltage flexible cable with the connectors and the copper core cable are provided with cable connectors which are 8 in total; the connectors of the low-voltage flexible cable are installed and fixed at two ends of the low-voltage flexible cable and can be quickly connected to cylinders such as a screw rod and the like in a plugging mode; the cabinet body is made of iron plates and has enough mechanical strength; the outer box door is made of an iron plate and is movably connected with the box body through a hinge, and a mechanical rotating door lock is arranged on one side of the outer box door; the observation window is positioned at the upper part of the outer box door and is made of acrylic glass, so that an operator can check the conditions of the upper panel and the lower panel of the cabinet body through the observation window under the condition that the outer box door is not opened; the air holes are positioned at the lower part of the outer box door, so that the air inside and outside the cabinet body can be exchanged, and the moisture in the cabinet body can be removed; the upper panel is made of an iron plate and is movably connected with the cabinet body through a hydraulic support rod; the lower panel is made of iron plates and is movably connected with the cabinet body through a hydraulic support rod, and the voltmeter is installed on the upper panel; the three-phase ammeter is arranged on the upper panel, and the electronic instrument has the advantages that the front side can read the three-phase current value, and the back side is provided with a wiring terminal which can measure the three-phase current condition of the bypass; the phase detector is arranged on the upper panel, the state of the phase detector can be checked on the front side, and the wiring terminal is arranged on the back side and can automatically detect the phase sequence conditions on the two sides of the load switch; the nuclear phase indicator light is arranged on the upper panel; the multifunctional metering display meter is arranged on the lower panel, the front side of the multifunctional metering display meter can be used for checking the real-time and historical power and electric quantity of the bypass, and the back side of the multifunctional metering display meter is provided with a wiring terminal; the switch operating handle is made of an insulating material, the operating handle is arranged on the front side, corresponding switch-on and switch-off indicating boards are arranged on the front side, an operator controls the switch-on and switch-off of the load switch by rotating the handle, and the back side of the switch operating handle is connected with the load switch; the number of the switching-off indicating lamps and the number of the switching-on indicating lamps are 2, the indicating lamps are arranged on the front sides, the switching-off indicating lamps are green, the switching-on indicating lamps are red, the state of a load switch can be visually displayed by the on and off of the switching-off indicating lamps, and the wiring terminals are arranged on the back sides; the load switch adopts a low-voltage air switch and can cut off the bypass load current; the zero line connecting plate is made of copper and has the function of connecting a wire inlet end with a zero line cable of a wire outlet end; the phase sequence protection relay can automatically judge whether the bypass phase sequence is correct or not and can control the on-off of the phase sequence protection circuit breaker according to a judgment result; the phase sequence protection circuit breaker adopts a normally closed air circuit breaker, and automatically trips when a signal for judging a phase sequence error of a phase sequence protection relay is received, so that a bypass is protected; the phase sequence protection fuse wire can prevent the phase sequence protection relay from being burnt due to overcurrent; the iron stand is connected with the cabinet body and fixes 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 on the cabinet body; the cable plays an electrical connection role among the inlet end cable quick plugging interface, the load switch, the zero line connecting plate, the phase sequence protection circuit breaker and the outlet end cable quick plugging interface; the inlet end cable quick plugging interface is positioned on the back surface of the multifunctional bypass switch cabinet; the outlet end cable quick plugging interface is positioned on the back of the multifunctional bypass switch cabinet; a connecting frame made of copper; clamping the bolt by the low-voltage sleeve, and brushing insulating paint outside; the low-voltage sleeve compresses the nut and is externally brushed with insulating paint; the adapter is a copper part; the adapter presss from both sides tight bolt, brushes insulating varnish outward, after the adapter is rotatory to suitable angle, screws up the adapter and presss from both sides tight bolt and makes the link press from both sides tight adapter, and the adapter angle is fixed this moment, and closely links to each other with the link.

The voltmeter is provided with 3 pieces, and is arranged on the upper panel, the front side of the mechanical instrument can read the voltage value, and the back side of the mechanical instrument is provided with a wiring terminal which can measure the three-phase voltage conditions at two ends of the load switch.

The nuclear phase indicating lamps are 3 in number, are mounted on the upper panel, the indicating lamps are arranged on the front side, the result of checking the phase sequence of the nuclear phase device on the two sides of the load switch can be visually displayed by turning on and off the lamps, when the lamps are turned on, the phase sequence is proved to be wrong, when the lamps are turned off, the phase sequence is proved to be correct, and the back side is provided with wiring terminals.

The quick plug interface of inlet wire end cable, be located the multi-functional bypass switch cabinet back, the connector of low pressure flexible cable can be connected through the mode of plug to one end to be equipped with locking mechanism, prevent to drop after the cable inserts, the other end extends to cabinet internal portion.

The quick plug interface of leading-out terminal cable, be located the multi-functional bypass switch cabinet back, the connector of low pressure flexible cable can be connected through the mode of plug to one end to be equipped with locking mechanism, prevent to drop after the cable inserts, the other end extends to cabinet internal portion.

The connecting frame, the copper part, brush insulating varnish outward, have good electric conductivity, can overlap on distribution transformer's low-voltage bushing and use low-voltage bushing as the horizontal rotation of axle.

The low-voltage sleeve clamping bolt is externally brushed with insulating paint, and after the connecting frame is sleeved into the low-voltage sleeve, the connecting frame is tightly screwed to clamp the low-voltage sleeve and is tightly connected with the low-voltage sleeve.

A400V bypass switch and a method for using a nuclear phase current and voltage monitoring device are characterized in that:

the method comprises the following steps: an operator adjusts the proper angles of the 4 transition connectors in the complete equipment, installs the transition connectors on the low-voltage sleeve of the transformer, screws down the low-voltage sleeve clamping bolts and the low-voltage sleeve clamping nuts to ensure that the transition connectors can be connected with the low-voltage sleeve of the transformer, and then connects one ends of the 4 low-voltage flexible cables on the incoming line side to the transition connectors;

step two: the other ends of the 4 low-voltage flexible cables at the wire inlet side are inserted into corresponding wire inlet end cable quick plugging interfaces on the multifunctional bypass switch cabinet in the complete device by an operator, and a locking mechanism ensures that the cables can be connected reliably;

step three: an operator inserts one end of 4 low-voltage flexible cables at the outgoing line side into a corresponding outgoing line end cable quick plugging interface on the multifunctional bypass switch cabinet in the complete device, and a locking mechanism ensures that the cables can be connected reliably, and the other end of the cables is connected to a load side line;

Step four: at the moment, the phase sequence checking work is automatically carried out on the circuits on two sides of the switch by the phase checker and the 3 voltmeters in the multifunctional bypass switch cabinet in the complete set of equipment, when the phase sequences on two sides of the switch are all correct, the 3 phase checking indicator lamps are completely turned off, the readings of the three-phase voltmeters are all 220V, when one phase sequence on two sides of the load switch is wrong, the phase checking indicator lamp of the corresponding phase is turned on, the reading of the voltmeter of the corresponding phase is 380V, and an operator can safely and quickly adjust the phase sequence through the cable quick plugging and unplugging interfaces of the inlet and outlet terminals according to the conditions of the turning on and turning off of the phase checking indicator lamps and the reading;

step five: when the phase sequence is all correct, an operator rotates a switch operation handle in the multifunctional bypass switch cabinet in the complete equipment from a separated position to a closed position, and at the moment, if the actual phase sequence of a bypass is wrong due to faults of a voltmeter and a phase checker, a phase sequence protection relay controls a phase sequence protection circuit breaker to automatically trip, and a bypass loop is cut off;

step six: after the bypass normally operates, the operating personnel can judge through the three-phase ampere meter reading in the multi-functional bypass switch cabinet among this integrated equipment whether the bypass has been treated and overhauld the circuit and can lean on the reposition of redundant personnel, can also look over data such as power, the electric quantity of bypass through multi-functional measurement display meter.

Claims (10)

1. The utility model provides a 400 volt bypass switch and nuclear phase current and voltage monitoring devices which characterized in that: the 400-volt bypass switch and nuclear phase current and voltage monitoring device comprises a multifunctional bypass switch cabinet, a transition connector, a low-voltage flexible cable with a connector, a connector of the low-voltage flexible cable, a cabinet body, an outer box door, an observation window, an air hole, an upper panel, a lower panel, a voltmeter, a three-phase ammeter, a nuclear phase device, a nuclear phase indicator lamp, a multifunctional metering display meter, a switch operating handle, a switch-off and switch-on indicator lamp, 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 plugging interface, a cable outlet end cable quick plugging interface, a connecting frame, a low-voltage sleeve clamping bolt, a low-voltage sleeve compression nut, an adapter and an adapter clamping bolt;

the multifunctional bypass switch cabinet is of a cabinet body structure of iron plates; the transition connector is a copper product, is coated with insulating paint on the outer surface and is a transition connecting device between a low-voltage sleeve of the transformer and a low-voltage flexible cable connector; the two ends of the low-voltage flexible cable with the connectors and the copper core cable are provided with cable connectors which are 8 in total; the connectors of the low-voltage flexible cable are installed and fixed at two ends of the low-voltage flexible cable and can be quickly connected to cylinders such as a screw rod and the like in a plugging mode; the cabinet body is made of iron plates and has enough mechanical strength; the outer box door is made of an iron plate and is movably connected with the box body through a hinge, and a mechanical rotating door lock is arranged on one side of the outer box door; the observation window is positioned at the upper part of the outer box door and is made of acrylic glass, so that an operator can check the conditions of the upper panel and the lower panel of the cabinet body through the observation window under the condition that the outer box door is not opened; the air holes are positioned at the lower part of the outer box door, so that the air inside and outside the cabinet body can be exchanged, and the moisture in the cabinet body can be removed; the upper panel is made of an iron plate and is movably connected with the cabinet body through a hydraulic support rod; the lower panel is made of iron plates and is movably connected with the cabinet body through a hydraulic support rod, and the voltmeter is installed on the upper panel; the three-phase ammeter is arranged on the upper panel, and the electronic instrument has the advantages that the front side can read the three-phase current value, and the back side is provided with a wiring terminal which can measure the three-phase current condition of the bypass; the phase detector is arranged on the upper panel, the state of the phase detector can be checked on the front side, and the wiring terminal is arranged on the back side and can automatically detect the phase sequence conditions on the two sides of the load switch; the nuclear phase indicator light is arranged on the upper panel; the multifunctional metering display meter is arranged on the lower panel, the front side of the multifunctional metering display meter can be used for checking the real-time and historical power and electric quantity of the bypass, and the back side of the multifunctional metering display meter is provided with a wiring terminal; the switch operating handle is made of an insulating material, the operating handle is arranged on the front side, corresponding switch-on and switch-off indicating boards are arranged on the front side, an operator controls the switch-on and switch-off of the load switch by rotating the handle, and the back side of the switch operating handle is connected with the load switch; the number of the switching-off indicating lamps and the number of the switching-on indicating lamps are 2, the indicating lamps are arranged on the front sides, the switching-off indicating lamps are green, the switching-on indicating lamps are red, the state of a load switch can be visually displayed by the on and off of the switching-off indicating lamps, and the wiring terminals are arranged on the back sides; the load switch adopts a low-voltage air switch and can cut off the bypass load current; the zero line connecting plate is made of copper and has the function of connecting a wire inlet end with a zero line cable of a wire outlet end; the phase sequence protection relay can automatically judge whether the bypass phase sequence is correct or not and can control the on-off of the phase sequence protection circuit breaker according to a judgment result; the phase sequence protection circuit breaker adopts a normally closed air circuit breaker, and automatically trips when a signal for judging a phase sequence error of a phase sequence protection relay is received, so that a bypass is protected; the phase sequence protection fuse wire can prevent the phase sequence protection relay from being burnt due to overcurrent; the iron stand is connected with the cabinet body and fixes 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 on the cabinet body; the cable plays an electrical connection role among the inlet end cable quick plugging interface, the load switch, the zero line connecting plate, the phase sequence protection circuit breaker and the outlet end cable quick plugging interface; the inlet end cable quick plugging interface is positioned on the back surface of the multifunctional bypass switch cabinet; the outlet end cable quick plugging interface is positioned on the back of the multifunctional bypass switch cabinet; a connecting frame made of copper; clamping the bolt by the low-voltage sleeve, and brushing insulating paint outside; the low-voltage sleeve compresses the nut and is externally brushed with insulating paint; the adapter is a copper part; the adapter presss from both sides tight bolt, brushes insulating varnish outward, after the adapter is rotatory to suitable angle, screws up the adapter and presss from both sides tight bolt and makes the link press from both sides tight adapter, and the adapter angle is fixed this moment, and closely links to each other with the link.

2. The 400 volt bypass switch and nuclear phase current and voltage monitoring device of claim 1 wherein: the voltmeter is provided with 3 pieces, and is arranged on the upper panel, the front side of the mechanical instrument can read the voltage value, and the back side of the mechanical instrument is provided with a wiring terminal which can measure the three-phase voltage conditions at two ends of the load switch.

3. The 400 volt bypass switch and nuclear phase current and voltage monitoring device of claim 1 wherein: the nuclear phase indicating lamps are 3 in number, are mounted on the upper panel, the indicating lamps are arranged on the front side, the result of checking the phase sequence of the nuclear phase device on the two sides of the load switch can be visually displayed by turning on and off the lamps, when the lamps are turned on, the phase sequence is proved to be wrong, when the lamps are turned off, the phase sequence is proved to be correct, and the back side is provided with wiring terminals.

4. The 400 volt bypass switch and nuclear phase current and voltage monitoring device of claim 1 wherein: the quick plug interface of inlet wire end cable, be located the multi-functional bypass switch cabinet back, the connector of low pressure flexible cable can be connected through the mode of plug to one end to be equipped with locking mechanism, prevent to drop after the cable inserts, the other end extends to cabinet internal portion.

5. The 400 volt bypass switch and nuclear phase current and voltage monitoring device of claim 1 wherein: the quick plug interface of leading-out terminal cable, be located the multi-functional bypass switch cabinet back, the connector of low pressure flexible cable can be connected through the mode of plug to one end to be equipped with locking mechanism, prevent to drop after the cable inserts, the other end extends to cabinet internal portion.

6. The 400 volt bypass switch and nuclear phase current and voltage monitoring device of claim 1 wherein: the connecting frame, the copper part, brush insulating varnish outward, have good electric conductivity, can overlap on distribution transformer's low-voltage bushing and use low-voltage bushing as the horizontal rotation of axle.

7. The 400 volt bypass switch and nuclear phase current and voltage monitoring device of claim 1 wherein: the low-voltage sleeve clamping bolt is externally brushed with insulating paint, and after the connecting frame is sleeved into the low-voltage sleeve, the connecting frame is tightly screwed to clamp the low-voltage sleeve and is tightly connected with the low-voltage sleeve.

8. The 400 volt bypass switch and nuclear phase current and voltage monitoring device of claim 1 wherein: the low-voltage sleeve gland nut is externally brushed with insulating paint, and after the connecting frame is sleeved into the low-voltage sleeve, the low-voltage sleeve gland nut is installed on a bolt exposed out of the low-voltage sleeve and tightly presses the connecting frame to prevent the connecting frame from falling off from the low-voltage sleeve.

9. The 400 volt bypass switch and nuclear phase current and voltage monitoring device of claim 1 wherein: the adapter, copper, brush insulating varnish outward, have good electric conductivity, one end is installed on the link, the other end can be 360 degrees rotations in the vertical direction after buckling 90 degrees to can be connected with low tension cable's connector.

10. A method of using the 400 volt bypass switch and nuclear phase current and voltage monitoring device of claim 1, wherein:

the method comprises the following steps: an operator adjusts the proper angles of the 4 transition connectors in the complete equipment, installs the transition connectors on the low-voltage sleeve of the transformer, screws down the low-voltage sleeve clamping bolts and the low-voltage sleeve clamping nuts to ensure that the transition connectors can be connected with the low-voltage sleeve of the transformer, and then connects one ends of the 4 low-voltage flexible cables on the incoming line side to the transition connectors;

step two: the other ends of the 4 low-voltage flexible cables at the wire inlet side are inserted into corresponding wire inlet end cable quick plugging interfaces on the multifunctional bypass switch cabinet in the complete device by an operator, and a locking mechanism ensures that the cables can be connected reliably;

step three: an operator inserts one end of 4 low-voltage flexible cables at the outgoing line side into a corresponding outgoing line end cable quick plugging interface on the multifunctional bypass switch cabinet in the complete device, and a locking mechanism ensures that the cables can be connected reliably, and the other end of the cables is connected to a load side line;

step four: at the moment, the phase sequence checking work is automatically carried out on the circuits on two sides of the switch by the phase checker and the 3 voltmeters in the multifunctional bypass switch cabinet in the complete set of equipment, when the phase sequences on two sides of the switch are all correct, the 3 phase checking indicator lamps are completely turned off, the readings of the three-phase voltmeters are all 220V, when one phase sequence on two sides of the load switch is wrong, the phase checking indicator lamp of the corresponding phase is turned on, the reading of the voltmeter of the corresponding phase is 380V, and an operator can safely and quickly adjust the phase sequence through the cable quick plugging and unplugging interfaces of the inlet and outlet terminals according to the conditions of the turning on and turning off of the phase checking indicator lamps and the reading;

Step five: when the phase sequence is all correct, an operator rotates a switch operation handle in the multifunctional bypass switch cabinet in the complete equipment from a separated position to a closed position, and at the moment, if the actual phase sequence of a bypass is wrong due to faults of a voltmeter and a phase checker, a phase sequence protection relay controls a phase sequence protection circuit breaker to automatically trip, and a bypass loop is cut off;

step six: after the bypass normally operates, the operating personnel can judge through the three-phase ampere meter reading in the multi-functional bypass switch cabinet among this integrated equipment whether the bypass has been treated and overhauld the circuit and can lean on the reposition of redundant personnel, can also look over data such as power, the electric quantity of bypass through multi-functional measurement display meter.

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