CN104734037A - Overhauling power box - Google Patents
Overhauling power box Download PDFInfo
- Publication number
- CN104734037A CN104734037A CN201510008686.3A CN201510008686A CN104734037A CN 104734037 A CN104734037 A CN 104734037A CN 201510008686 A CN201510008686 A CN 201510008686A CN 104734037 A CN104734037 A CN 104734037A
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- cable
- power
- door
- switch
- chamber
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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
- H02B1/46—Boxes; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
- H01R4/42—Clamping area to one side of screw only
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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
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
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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
- H02B1/46—Boxes; Parts thereof or accessories therefor
- H02B1/48—Mounting of devices therein
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The invention discloses an overhauling power box which comprises a box body. The box body is internally divided into a power supply chamber, a switch chamber, a power terminal chamber and a socket terminal chamber. Cable connectors on the left side and the right side of the power supply chamber are connected with a wire-feeding cable and a wire-discharging cable respectively. The front face of the switch chamber is provided with a switch chamber door, and the switch chamber door is further provided with a turning waterproof glass door. An air switch QF1, an electric leakage protector LJ1, a PE wire overcurrent protector PEB, an electric leakage protector LJ2 and an air switch QF2 are sequentially arranged behind the waterproof glass door in the switch chamber from left to right. The front face of the power terminal chamber is provided with a power terminal chamber door. The power terminal chamber is internally provided with a plurality of quick-wiring terminals. The front face of the socket terminal chamber is provided with a socket terminal chamber door. Cable wire-feeding openings are formed below the power terminal chamber and the socket terminal chamber and are provided with cable holders. The overhauling power box has the advantages that the problems that it is difficult to conduct wiring on the power box, and a safety interlock is lacked and earth screen shunt on two sides of an electric welding machine burns a protective earthing conductor are solved, the wiring is convenient and fast to conduct, and safety performance is high.
Description
Technical field
The present invention relates to a kind of maintenance power box.
Background technology
Maintenance power box is a large amount of small distribution case (cabinet, post) used in industrial and mining enterprises and society, has fixed and portable two kinds.The main application of maintenance power box is that fire taken by electric welding machine, is secondly temporary lighting and single phase electric tool, sometimes powers for electric heating equipment or motor test run.Its general structure is made up of elements such as distribution box housing, several low-voltage air switchs, control transformer, electric binding terminal, plugs and socketss.The ubiquitous problem of current maintenance power box has:
1, bus type power supply structure makes inlet wire cable connection that difficulty occur.Bus type power supply refers to and mount multiple power supply box on a power circuit, and the feed cable entering maintenance power box is often very thick and be two, even more than two.And the terminal of air switch (general 100-200A) is less in power supply box, cable incoming-outgoing wire and terminal connections is made to produce difficulty.
2, safety interlocking and power supply instruction is generally short of; Maintenance power box often can open chamber door for taking fire operation, in order to personal safety, must have a power failure, namely disconnect air switch before operation.Desirable safety measure sets up " chamber door---air switch " interlocking, air switch auto-breaking when namely chamber door is opened and cannot closing, chamber door close after air switch could combined floodgate power transmission.But current maintenance power box often lacks this safety interlocking.
3, maintenance power box is taken fire and is mostly provisional weight, feeds out that side terminal connects, frequent operation of taking out stitches.Load cable heart yearn termination structure varies, and common binding post is difficult to adaptation, and because crimping, unreal to cause loose contact even to burn terminal be common phenomenon.
4, how fixing quickly and easily and to remove provisional weight cable, is also a problem needing improvement.Current actual conditions are, due to fixing and to remove cable formality complicated, operator often omits this step, allows cable core termination directly bear cable tension.Cause cable core to be pulled, break thus, cause disconnected phase, short circuit, electric shock accidents probability greatly improve.
5, all safety regulationss all metal shell of regulation electric welding machine and secondary coil must connect protection ground wire (PE line), also of common occurrence because not connecing the get an electric shock case of injures and deaths of the PE line personnel that cause.But often there is welding current with the PE line of feed cable for return flow line (i.e. so-called earth mat shunting) in job site, cause the accident that feed cable burns, PE line becomes accident source on the contrary.Cause electric welder to connect protection ground wire to electric welding machine to suspect, be not even ready to connect protection ground wire.This is a potential safety hazard that always annoying electric welding construction.
6, other safety function that maintenance power box should be equipped with also comprises: (1) no-voltage trip, and when external power accidental power failure, air switch should disconnect immediately automatically, and when preventing from restoring electricity, load self-starting causes the person or equipment breakdown; (2) earth leakage protective, when operator gets an electric shock or instrument leaks electricity, air switch should disconnect immediately automatically; (3) the caller identification of mains side and load side, helps operator to understand the virtual condition of maintenance power box fast, stops erroneous judgement and misoperation; (4) tightly stop and locking press button, can have a power failure fast when there is emergency, namely button is locked after pressing, and could must reset with key, prevents unrelated person from abusing power supply box.The realization of above-mentioned all function does not have difficulty technically, but is not pressure standard, most of maintenance power box in this respect be configured with lacuna.
Summary of the invention
The present invention is for avoiding the weak point that exists in above-mentioned prior art, providing a kind of maintenance power box, to solve power supply box wiring difficulty, lack the problem of safety interlocking, to improve wiring efficiency and fail safe.
The present invention be technical solution problem by the following technical solutions.
Maintenance power box, its design feature comprises casing, and the top of casing is provided with cover plate; Power supply room, switch gear room, power end seed cell and socket end seed cell is divided in described casing; The cable joint of the left and right sides of described power supply room connects inlet wire cable and outlet cable respectively, is provided with shackle insulator in described power supply room, the panel in the front of power supply room is provided with power supply room indicator light XD1;
The front of described switch gear room is provided with switch gear room's door, and described switch gear room door is also provided with turnover waterproof glass door; In described switch gear room, set gradually having air switch QF1, earth leakage protective device LJ1, PE line overcurrent protector PEB, earth leakage protective device LJ2 and air switch QF2 after described waterproof glass door from left to right, just can carry out manual operation to air switch QF1, earth leakage protective device LJ1, PE line overcurrent protector PEB, earth leakage protective device LJ2 and air switch QF2 to make opening waterproof glass door; On described switch gear room door, above described waterproof glass door, be disposed with buzzer FM, indicator light XD2, indicator light XD3 and scram button TA from left to right;
The front of described power end seed cell is provided with power end Zi Shimen, described power terminal indoor are provided with multiple quick-connect terminal), described quick-connect terminal) comprise A phase connection terminal A, B phase connection terminal B, C phase connection terminal C, earth terminal N and PE line binding post PE; The below of described power end seed cell is provided with long cable section of ingoing line mouth, and described long cable section of ingoing line mouth is provided with cable gripper;
The front of described socket end seed cell is provided with socket end Zi Shimen, and described female terminal indoor are provided with supply socket, A phase connection terminal A, earth terminal N and PE line binding post PE; The below of described socket end seed cell is provided with long cable section of ingoing line mouth, and described long cable section of ingoing line mouth is provided with cable gripper.
Described air switch QF1 and air switch QF2 is the air switch of band no-voltage trip coil.
Described switch gear room door, power end seed cell door and socket end seed cell door are respectively arranged with a door lock.
Described quick-connect terminal comprises insulator, copper coin, insulation knob, screw rod, support, spring, lead-out wire and external wire entrance; Described insulator is provided with two copper coins, the left end of two copper coins is connected with described lead-out wire after being tightened together by bolt superposition; The right side of described copper coin is external wire entrance, between described two copper coins, be provided with spring; Described insulator is also provided with a support, the top of described support is provided with the screw rod that screws in described support, and screw tip is provided with described insulation knob; In screw rod lower end and two copper coins, a copper coin abuts against above, to be depressed a copper coin above by rotary screw, makes two copper coins clampings from the external wire of external wire entrance access.
Described cable gripper comprises two cams, and described two cams are fixed on described maintenance power box by torque spring; Described two cams abut mutually; The outer contour of the bearing surface of the mutual abutting of described two cams is involute, is passed, clamped by two bearing surfaces by described by the cable clamped by the cable clamped between described two cams.
Compared with the prior art, beneficial effect of the present invention is embodied in:
Maintenance power box of the present invention, is divided into power supply room, switch gear room, power end seed cell and socket end seed cell in described casing.Air switch QF1 and air switch QF2 is the air switch of band no-voltage trip coil.Switch gear room's door, power end seed cell door and socket end seed cell door are respectively arranged with a door lock.Air switch QF1, earth leakage protective device LJ1, PE line overcurrent protector PEB is provided with in described switch gear room.The below of power end seed cell, socket end seed cell is provided with on long cable section of ingoing line mouth and is provided with cable gripper.Cable gripper comprises two cams, and the outer contour of the bearing surface of the mutual abutting of described two cams is involute.
Maintenance power box of the present invention has following feature:
1, perfect Security and protection configuration; Air switch QF1, QF2 have quick-break, overcurrent protection function, for the protection of short circuit and the overload accident of power load.Leakage relay LJ1, LJ2, the no-voltage trip coil of air switch QF1, QF2 is combined and is realized electrical shock protection.The no-voltage trip coil of air switch QF1, QF2 realizes decompression trip protection, automatically recovers power transmission after preventing power loss.Power supply room, switch gear room, terminal room all have indicator light to show charged situation.The effect of scram button (TA, band key): (1) in emergency circumstances can have a power failure immediately; (2) press the button and can not to reset without key afterwards, maintenance power box cannot power transmission, prevents idler from abusing.
When opening the door of terminal room, travel switch (XK1, XK2) action, the automatic trip of respective air switch, terminal room door does not shut can not power transmission, to ensure the personal safety of operator.
2, independently power supply room facilitate bus type electric power loop point switch through confession.
3, quick-connect terminal strong adaptability.Open clamping face, can adapt to various conductor terminal or heart yearn, and mounting or dismounting are convenient.Chucking power is large, and contact-making surface is large, can bear big current.By the insulation knob-operated carried, need not the external tools such as screwdriver.
4, cable gripper is quick and convenient.
Described cable gripper is made up of the cam that two have certain evolvent profile.When the cable be fixed inserts in the middle of two cams of clamper, cam separates automatically, and insertion force is very little.After inserting, cam compressing cable surface produces frictional force, and this frictional force can stop cable to pull out.The cam hard rubber of cable gripper or bakelite make, natural insulation.Logatithmic spiral makes holding angle keep constant, has nothing to do with cable size.Smooth surface makes cable surface not be mechanically damaged.Cable (or heart yearn) diameter 2-40mm all can effectively clamp.Namely cable is clamped after inserting, and cannot pull out.Remove clamping and must open terminal room door, unclamp corresponding mechanism.Cable is extracted rear clamper out and is automatically closed up, and water proof and dust proof enters control cabinet.
5, configure PEB protector, realize early warning and defencive function that PE line is burnt in the shunting of electric welding machine earth mat.
Between the protective earthing line and the earth terminal of electric welding machine of electrical network, seal in PEB (PE line overcurrent protector), its effect is: the electric current detecting PE line (protective earthing line), when PE line current is greater than setting, PEB sends alarm signal, remind operator to adjust ground strap or weldment, eliminate earth mat shunting; When PE line current is greater than the safety electric flow valuve of PE line, the inverse-time overcurrent protection action of PEB, drives air switch tripping operation, and the PE line of protection electric welding machine is not burnt; Meanwhile, PE line overcurrent indicator light is bright, teaching process person trip reason; Inverse-time overcurrent protection definite value is adjustable, can arrange and reset manually or automatically; Configurable PE line over-current signal teletransmission interface (dry contact or active output), is applicable to various AC & D. C. arc welding machine.
6, power supply transfer easily; Inlet wire cable terminal is pressed on the shackle insulator in power supply room, has nothing to do with the size of air switch binding post.
Maintenance power box of the present invention, have can solve power supply box wiring difficulty, lack safety interlocking, problem that protective earthing line is burnt in earth mat shunting in electric welding machine secondary side, easy-to-connect are quick, security performance advantages of higher.
Accompanying drawing explanation
Fig. 1 is the front view (outline drawing) of the casing of maintenance power box of the present invention.
Fig. 2 is the front view (cut-away view) of the casing of maintenance power box of the present invention.
Fig. 3 is the lateral plan (cut-away view) of the casing of maintenance power box of the present invention.
Fig. 4 is the electrical schematic diagram of maintenance power box of the present invention.
Fig. 5 is the power supply room winding diagram of maintenance power box of the present invention.
Fig. 6 is the structural representation of the quick-connect terminal of maintenance power box of the present invention.
Fig. 7 is the structural representation of the cable gripper of maintenance power box of the present invention.
In accompanying drawing 1-7, label is: 1 power supply room, 2 cable joints, 3 cover plates, 4 switch gear rooms, 4-1 switch gear room door, 5 waterproof glass doors, 6 door locks, 7 power end seed cells, 7-1 power end Zi Shimen, 8 socket end seed cells, 8-1 socket end Zi Shimen, 9 cable grippers, 9-1 cable, 9-2 cam, 9-3 binding post, 9-4 distribution box, 9-5 external pull, the power that 9-6 makes cam open, 10 shackle insulator 11 quick-connect terminals, 11-1 insulator, 11-2 copper coin, 11-3 insulate knob, 11-4 screw rod, 11-5 support, 11-6 spring, 11-7 lead-out wire, 11-8 external wire entrance, 12 supply sockets, 13-1 inlet wire cable, 13-2 outlet cable.
Below by way of embodiment, and the invention will be further described by reference to the accompanying drawings.
Embodiment
See Fig. 1 ~ Fig. 7, maintenance power box of the present invention, comprises casing, and the top of casing is provided with cover plate 3; Power supply room 1, switch gear room 4, power end seed cell 7 and socket end seed cell 8 is divided in described casing; The cable joint 2 of the left and right sides of described power supply room 1 connects inlet wire cable 13-1 and outlet cable 13-2 respectively, is provided with shackle insulator 10 in described power supply room 1, the panel in the front of power supply room 1 is provided with power supply room indicator light XD1;
The front of described switch gear room 4 is provided with switch gear room door 4-1, and described switch gear room door 4-1 is also provided with turnover waterproof glass door 5; In described switch gear room 4, set gradually having air switch QF1, earth leakage protective device LJ1, PE line overcurrent protector PEB, earth leakage protective device LJ2 and air switch QF2 from left to right after described waterproof glass door 5, just can carry out manual operation to air switch QF1, earth leakage protective device LJ1, PE line overcurrent protector PEB, earth leakage protective device LJ2 and air switch QF2 to make opening waterproof glass door 5; On described switch gear room door 4-1, above described waterproof glass door 5, be disposed with buzzer FM, indicator light XD2, indicator light XD3 and scram button TA from left to right;
The front of described power end seed cell 7 is provided with power end seed cell door 7-1, be provided with multiple quick-connect terminal 11 in described power end seed cell 7, described quick-connect terminal 11 comprises A phase connection terminal A, B phase connection terminal B, C phase connection terminal C, earth terminal N and PE line binding post PE; The below of described power end seed cell 7 is provided with long cable section of ingoing line mouth, and described long cable section of ingoing line mouth is provided with cable gripper 9;
The front of described socket end seed cell 8 is provided with socket end seed cell door 8-1, is provided with supply socket 12, A phase connection terminal A, earth terminal N and PE line binding post PE in described socket end seed cell 8; The below of described socket end seed cell 8 is provided with long cable section of ingoing line mouth, and described long cable section of ingoing line mouth is provided with cable gripper 9.
Described air switch QF1 and air switch QF2 is the air switch of band no-voltage trip coil.
Described switch gear room door 4-1, power end seed cell door 7-1 and socket end seed cell door 8-1 are respectively arranged with a door lock 6.
Described quick-connect terminal 11 comprises insulator 11-1, copper coin 11-2, insulation knob 11-3, screw rod 11-4, support 11-5, spring 11-6, lead-out wire 11-7 and external wire entrance 11-8; Described insulator 11-1 is provided with two copper coin 11-2, the left end of two copper coin 11-2 is connected with described lead-out wire 11-7 after being tightened together by bolt superposition; The right side of described copper coin 11-2 is external wire entrance 11-8, between described two copper coin 11-2, be provided with spring 11-6; Described insulator 11-1 is also provided with a support 11-5, the top of described support 11-5 is provided with the screw rod 11-4 that screws in described support 11-5, and screw rod 11-4 top is provided with described insulation knob 11-3; In screw rod 11-4 lower end and two copper coin 11-2, a copper coin 11-2 abuts against above, to depress a copper coin 11-2 above by rotary screw 11-4, makes two copper coin 11-2 clamp the external wire accessed from external wire entrance 11-8.
Described cable gripper 9 comprises two cam 9-2, and described two cam 9-2 are fixed on described maintenance power box by torque spring; Described two cam 9-2 abut mutually; The outer contour of the bearing surface of the mutual abutting of described two cam 9-2 is involute, is passed, clamped by two bearing surfaces by described by the cable 9-1 clamped by the cable 9-1 clamped between described two cam 9-2.
Maintenance power box of the present invention, its main application provides temporary source to site examining and repairing operation.Compared with current existing maintenance power box, this power supply box has the advantages such as easy-to-connect is quick, safeguard protection is complete.
In accompanying drawing 4, the implication of each symbol is as follows:
QF1, QF2---air switch (band no-voltage trip coil); LJ1, LJ2---earth leakage protective device; RD1--3---fuse; PEB---PE line overcurrent protector; FM---buzzer; TA---scram button (band key); XK1, XK2---micro limit switch; CZ1, CZ2---supply socket; XD1-5---indicator light.
Maintenance power box of the present invention has following feature:
1, perfect Security and protection configuration
1.1 quick-breaks, overcurrent protection---the inherent function of air switch QF1, QF2, for the protection of short circuit and the overload accident of power load.
1.2 electrical shock protections---by leakage relay LJ1, LJ2, realization combined by the no-voltage trip coil of air switch QF1, QF2.Leakage relay setting value is generally 30mA, 0 second.
1.3 decompression trip protections---realized by the no-voltage trip coil of air switch QF1, QF2.
1.4 power supply rooms, switch gear room, the charged display in terminal room---realized by indicator light XD1, XD4, XD5.
1.5 anxious stop and locking---and by being with key scram button TA, the no-voltage trip coil of air switch QF1, QF2 combines realization with chamber door door lock.
1.6 terminal room doors and air switch locking---combine realization by the no-voltage trip coil of travel switch XK1, XK2 and QF1, QF2.
Early warning and the defencive function of protective earthing line are burnt in 1.7 electric welding machine earth mat shuntings---combine realization by PEB (PE line overcurrent protector) with the no-voltage trip coil of QF1, QF2.
2, independently power supply room facilitate bus type electric power loop point switch through confession
Inlet wire cable terminal is pressed on the shackle insulator in power supply room, have nothing to do with the size of air switch binding post, switching power supply is convenient, can according to the diameter of user's request and cable, select 1 → 1 (1 enters 1 goes out), 1 → 2, the power supply room configuration structure of 1 → 3.
3, quick-connect terminal strong adaptability; The feature of described quick-connect terminal is:
3.1 open clamping planes, can adapt to conductor terminal or the heart yearn of all size, and mounting or dismounting are convenient.
3.2 chucking powers are large, and contact-making surface is large, and radiating condition is good, can bear big current.
3.3 by the insulation knob-operated carried, need not the external tools such as screwdriver, spanner.
4, cable gripper is quick and convenient;
The structure of described cable gripper is as Fig. 7, and its main body is made up of the cam that two have certain evolvent profile, has torque spring and synchronous mechanism between two cams, and two cams can be made synchronously to close up to central or separate to both sides.Cam closes up under the effect of torque spring at ordinary times.When the cable be fixed inserts in the middle of two cams of clamper, cam separates automatically, and insertion force is very little.After inserting, cam compressing cable surface produces frictional force, and this frictional force can stop cable to pull out.Suitably choose the shape of cam material and cam curve, such mechanics effect can be reached---no matter external pull F1 has much, all cable can not be pulled out from clamper.During dismounting cable, manually oppositely to exert a force F2 to cam, overcome spring torsion, lazy-tongs separate cam to both sides, and namely cable contacts with cam disengages and automatically deviate from.
This cable gripper has the following advantages:
4.1 handling cables need not use the specific purpose tools such as spanner;
4.2 charge and discharge operations simple and fasts are laborsaving;
The thrust of 4.3 pairs of cables is generated automatically by clamp structure, and thrust is little under normal circumstances, and when cable is pulled by external force, thrust increases thereupon, is not pulled as degree, avoid operating accident and cable fault to greatest extent with cable;
4.4 cam clamping face insulating material are made, and can not hurt cable or cause short circuit;
4.5 can self adaptation on-the-spot various diameter, variform cable, electric wire, and presses the cable core of line nose;
After 4.6 cables are extracted out, entrance hole is closed automatically, prevents dust, toy etc. from entering;
4.7 holder structures are simple, and element is sturdy, not fragile;
4.8 clampers, as an individual components, can be arranged on the wire hole place of various distribution box, not affect layout in the body structure of distribution box, mechanical strength, case, and the realization of other function.
5, configure PEB protector, realize early warning and defencive function that PE line is burnt in the shunting of electric welding machine earth mat.
National regulations, shell of electric welding machine and second siding ring must connect protection ground wire (PE line), but due to earth mat shunting existence, easily cause electric welding machine PE line to burn because of overcurrent, make PE line become accident source on the contrary.
Between the protective earthing line and the earth terminal of electric welding machine of electrical network, sealed in PEB (PE line overcurrent protector), its effect is: the electric current detecting PE line (protective earthing line), and when PE line current is greater than setting, PEB sends alarm signal; When PE line current is greater than the safety electric flow valuve of PE line, the inverse-time overcurrent protection action of PEB, drives air switch tripping operation, and the PE line of protection electric welding machine is not burnt.
When in electrical welding operation during welding circuit generation two points ground fault, earth mat shunting (I in figure
f) flow into electric welding machine PE line through ground networks, then the b point of electric welding machine secondary coil is back to through PEB.Work as I
fcurrent value is comparatively large, (I when likely threatening PE line safe
f>=10A), the audible-visual annunciator of PEB is reported to the police, and points out the existence of two points ground fault and earth mat shunting to operator.Work as I
felectric current is for a long time more than the safe carrying capacity (I of PE line
f>=20A), PE line faces the danger of burning, now the inverse-time overcurrent protection action of PEB, drives air switch tripping operation, and welding operation is forced to stop.
Claims (5)
1. maintenance power box, is characterized in that, comprises casing, and the top of casing is provided with cover plate (3); Power supply room (1), switch gear room (4), power end seed cell (7) and socket end seed cell (8) are divided in described casing; The cable joint (2) of the left and right sides of described power supply room (1) connects inlet wire cable (13-1) and outlet cable (13-2) respectively, be provided with shackle insulator (10) in described power supply room (1), the panel in the front of power supply room (1) be provided with power supply room indicator light XD1;
The front of described switch gear room (4) is provided with switch gear room's door (4-1), described switch gear room door (4-1) is also provided with turnover waterproof glass door (5); In described switch gear room (4), set gradually having air switch QF1, earth leakage protective device LJ1, PE line overcurrent protector PEB, earth leakage protective device LJ2 and air switch QF2 from left to right after described waterproof glass door (5), just can carry out manual operation to air switch QF1, earth leakage protective device LJ1, PE line overcurrent protector PEB, earth leakage protective device LJ2 and air switch QF2 to make opening waterproof glass door (5); In described switch gear room door (4-1), be disposed with buzzer FM, indicator light XD2, indicator light XD3 and scram button TA from left to right in described waterproof glass door (5) top;
The front of described power end seed cell (7) is provided with power end Zi Shimen (7-1), be provided with multiple quick-connect terminal (11) in described power end seed cell (7), described quick-connect terminal (11) comprises A phase connection terminal A, B phase connection terminal B, C phase connection terminal C, earth terminal N and PE line binding post PE; The below of described power end seed cell (7) is provided with long cable section of ingoing line mouth, described long cable section of ingoing line mouth is provided with cable gripper (9);
The front of described socket end seed cell (8) is provided with socket end Zi Shimen (8-1), is provided with supply socket (12), A phase connection terminal A, earth terminal N and PE line binding post PE in described socket end seed cell (8); The below of described socket end seed cell (8) is provided with long cable section of ingoing line mouth, described long cable section of ingoing line mouth is provided with cable gripper (9).
2. maintenance power box according to claim 1, is characterized in that, described air switch QF1 and air switch QF2 is the air switch of band no-voltage trip coil.
3. maintenance power box according to claim 1, is characterized in that, described switch gear room door (4-1), power end Zi Shimen (7-1) and socket end Zi Shimen (8-1) is respectively arranged with a door lock (6).
4. maintenance power box according to claim 1, it is characterized in that, described quick-connect terminal (11) comprises insulator (11-1), copper coin (11-2), insulation knob (11-3), screw rod (11-4), support (11-5), spring (11-6), lead-out wire (11-7) and external wire entrance (11-8); Described insulator (11-1) is provided with two copper coins (11-2), the left end of two copper coins (11-2) is connected with described lead-out wire (11-7) after being tightened together by bolt superposition; The right side of described copper coin (11-2) is external wire entrance (11-8), between described two copper coins (11-2), be provided with spring (11-6); Described insulator (11-1) is also provided with a support (11-5), the top of described support (11-5) is provided with the screw rod (11-4) that screws in described support (11-5), and screw rod (11-4) top is provided with described insulation knob (11-3); In screw rod (11-4) lower end and two copper coins (11-2), a copper coin (11-2) abuts against above, with by rotary screw (11-4) pressure copper coin (11-2) above, make the external wire that the clamping of two copper coins (11-2) is accessed from external wire entrance (11-8).
5. maintenance power box according to claim 1, is characterized in that, described cable gripper (9) comprises two cams (9-2), and described two cams (9-2) are fixed on described maintenance power box by torque spring; Described two cams (9-2) abut mutually; The outer contour of the bearing surface of the mutual abutting of described two cams (9-2) is involute, is passed between described two cams (9-2) by the cable (9-1) clamped, and is clamped described by two bearing surfaces by the cable (9-1) clamped.
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| CN201510008686.3A CN104734037B (en) | 2015-01-08 | 2015-01-08 | Maintenance power box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510008686.3A CN104734037B (en) | 2015-01-08 | 2015-01-08 | Maintenance power box |
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| CN104734037A true CN104734037A (en) | 2015-06-24 |
| CN104734037B CN104734037B (en) | 2017-10-10 |
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| CN201510008686.3A Active CN104734037B (en) | 2015-01-08 | 2015-01-08 | Maintenance power box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106981829A (en) * | 2017-05-24 | 2017-07-25 | 梁溪区旭中通用机械设计工作室 | A kind of automaton of distribution box |
| CN107570856A (en) * | 2017-09-25 | 2018-01-12 | 合肥国声电子通信有限责任公司 | A kind of universal intermediate frequency welding switch board monitor station |
| CN112382956A (en) * | 2020-09-30 | 2021-02-19 | 贵州电网有限责任公司 | Novel meter box |
| CN115967025A (en) * | 2022-12-23 | 2023-04-14 | 东台市飞凌电气设备有限公司 | Electric operating mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106981829A (en) * | 2017-05-24 | 2017-07-25 | 梁溪区旭中通用机械设计工作室 | A kind of automaton of distribution box |
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| CN112382956A (en) * | 2020-09-30 | 2021-02-19 | 贵州电网有限责任公司 | Novel meter box |
| CN115967025A (en) * | 2022-12-23 | 2023-04-14 | 东台市飞凌电气设备有限公司 | Electric operating mechanism |
| CN115967025B (en) * | 2022-12-23 | 2023-12-26 | 东台市飞凌电气设备有限公司 | Electric operating mechanism |
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| Publication number | Publication date |
|---|---|
| CN104734037B (en) | 2017-10-10 |
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