CN201570904U - Three-phase intelligent alternating current power distribution box - Google Patents
Three-phase intelligent alternating current power distribution box Download PDFInfo
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- CN201570904U CN201570904U CN2009202417860U CN200920241786U CN201570904U CN 201570904 U CN201570904 U CN 201570904U CN 2009202417860 U CN2009202417860 U CN 2009202417860U CN 200920241786 U CN200920241786 U CN 200920241786U CN 201570904 U CN201570904 U CN 201570904U
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Abstract
The utility model discloses a three-phase intelligent alternating current power distribution box which comprises a power supply input end, a lightning protection module, an electricity protection module and a plurality of branch switches, wherein the electricity protection module is a three-phase intelligent safe electricity protector, and comprises a main switch which is connected between the input end and the output end of an three-phase alternating current power supply, a control unit module for controlling the connection and disconnection of a main switch, a detection module which monitor the abnormal state of an alternating current and feeds back the state to the control unit module, a lightning protection module which is arranged on the input end of the three-phase alternating current power supply, a remote communication module which transfers data between a control unit module and a remote monitoring platform, and a direct current voltage stabilizing module which is connected with the output end of the lightning protection module and supplies working power for each module of the safe electricity protection. The three-phase intelligent alternating current power distribution box can effectively protect lightening and comprehensively protect an electric appliance, can effectively prevent a protection switch from frequently tripping, and can be automatically restored, achieves unmanned electricity management, and further guarantees the electric safety of an outdoor electric appliance.
Description
Technical field
The utility model relates to a kind of three-phase intelligent type A.C. distribution box.
Background technology
In communications industry field, the AC distribution equipment that low-voltage alternating-current distribution substation in mobile base station uses generally uses traditional electricity protection switch to add the AC distribution equipment that lightning-protection module makes up at present, in order to realize distribution, power consumption equipment is implemented overload, short-circuit protection.Three-phase electricity protection switch mainly contains: breaker of plastic casing, residual current circuit breaker etc.
Breaker of plastic casing is made the usefulness of connection, disjunction and carrying rated operational current in circuit; protect when circuit or during situation such as motor transships, short circuit; the dynamic and static contact and the feeler lever of circuit breaker are designed to parallel shape, and the electrodynamic repulsion force that utilizes short circuit to produce disconnects dynamic and static contact.When circuit is short-circuited or during serious overload current, short circuit current surpasses instantaneous trip setting current value, magnetictrip produces enough big suction, with the armature adhesive and clash into lever, make and have contact with rotate axle bed upwards rotation and snap close disengagement, latch under the effect of reaction spring three secondary main contact disjunctions, cut off the electricity supply.When general overload takes place in circuit, though overload current can not make the magnetictrip action, can make thermal element produce certain heat, impel bimetal leaf to be heated and be bent upwards, the promotion lever makes to have contact with snap close throws off, and with the main contact disjunction, cuts off the electricity supply.
The earth leakage protective part of residual current circuit breaker is made up of zero sequence current mutual inductor (sensing part), arithmetic and control unit (control section) and magnetictrip (action, operating part).All phases of protected main circuit, zero line all pass the iron core of zero sequence current mutual inductor, form the zero sequence current mutual inductor primary side.According to the kirchhoff electric current as can be known, in arbitrary moment, the electric current that flows into arbitrary node is constantly equal to the electric current that flows out this node, i.e. arbitrary moment, flow into the current phasor of (going out) certain node and be zero.The operation principle of zero sequence current mutual inductor is: the vector of transient current and whether be zero in the sensing primary side; when insulation fault appears in protected circuit; load-side has lets out live stream over the ground; it is the vector of zero sequence current mutual inductor and non-vanishing; just produce mutual voltage in the zero sequence current mutual inductor secondary winding; after this signal process arithmetic and control unit computing; when leakage current reaches when adjusting operating value; drive thyristor; connect the magnetictrip power supply; the magnetictrip adhesive makes circuit breaker trip, thereby reaches the effect of earth leakage protective device.
When situations such as circuit transships, short circuit, three-phase electricity protection switch disconnects circuit, the protection power consumption equipment.But traditional electricity protection switch only possesses overload, short circuit or creepage protection function, and defencive function is single, and power consumption equipment is not had comprehensively general protection and indicative functions such as mistake/under-voltage, short circuit/overload, electric leakage.
Because the mobile base station generally is installed in the open air, it is wide to distribute, poor working environment; often be subjected to the influence of thunder and lightning; therefore the lightning-protection module that meets national standard and relevant industries standard must be installed, the maximum discharge current of general lightning-protection module is 80kA, and power consumption equipment is implemented lightning protection.The operation principle of lightning-protected product is when the induction lightening ripple is invaded power supply or signal transmssion line, its internal lighting protection assembly will (＜25ns) response speed presents low impedance state with nanosecond, the earth of rapidly lightning current being released, to the overvoltage Limiting that causes by thunder and lightning in the withstand voltage scope that power consumption equipment can bear, guarantee the safe operation of electric equipment.But lightning-protection module can cause the frequent tripping operation of electricity protection switch when leakage current; cause and to power continuously to base station equipment; influence prolongs the base station back-up source operating time; reduced the useful life of base station equipment back-up source, the more serious website that has is owing to hypertelorism, and the attendant has no idea at short notice switch to be closed a floodgate to restore electricity; make base station service quit; the interrupt signal transmission reduces operator's telephone traffic, also can cause operator to suffer customer complaint simultaneously.Can find according to statistics, the residual current circuit breaker tripping operation of 20%～30% outdoor power consumption equipment is arranged approximately at the weather of a thunderstorm, what the area that has was the most serious surpasses 50%, make the work of the outdoor electricity consumption device interrupt of large tracts of land, simultaneously, also because of awful weather, restorer work in time brings than large economy to national economy and to lose.In fact, these tripping operations only need artificial simple the combined floodgate, just can restorer work.But because can not automatic closing after the tripping operation of residual current circuit breaker, breaker of plastic casing, need manually to close a floodgate one by one, add that device distribution is too wide, number is too many, the mains switch that a lot of in addition equipment are contained in the field, wilderness, have is locked in residential dormitory, the unit compound, and giving resumes work brings great difficulty and maintenance workload.
In addition, general power lightning protection module is not all installed the lightning protection switch, forms short circuit over the ground when causing lightning-protection module to lose efficacy, and causes master switch to trip because of short circuit, makes the base station equipment power interruptions.
Summary of the invention
The technical problems to be solved in the utility model is: at the deficiency of existing three-phase alternating current controller switching equipment; a kind of three-phase intelligent type A.C. distribution box is provided; effective lightning protection and general protection power device; can effectively prevent the frequent tripping operation of protection switch; and can recover automatically; realize the unattended management of power use, further guarantee the Electrical Safety of outdoor power consumption equipment.
The technical solution of the utility model is: a kind of three-phase intelligent type A.C. distribution box, comprise power input, lightning-protection module, electricity protection module and some branch switches, described electricity protection module is a three-phase intelligent type safety electricity consumption protector, comprises the main switch that is series between the three-phase alternating-current supply input and output side, the control unit module of control main switch break-make, the abnormality of AC power is monitored and is fed back to the detection module of control unit module, be located at the lightning protection module of three-phase alternating-current supply input, between control unit module and remote monitoring platform, transmit the remote communication module of data and each module of safety electricity consumption protector of giving of lightning protection module output connection the DC voltage-stabilizing module of working power is provided; Described lightning-protection module is connected in parallel between the every live wire and zero line between power input and the three-phase intelligent type safety electricity consumption protector, and the output of described three-phase intelligent type safety electricity consumption protector connects some branch switches.
The more detailed technical scheme of the utility model is:
Described lightning-protection module comprises lightning protection air switch and lightning protection circuit.
Described power input comprises mains supply input and oily dynamo-electric source input, described three-phase intelligent type A.C. distribution box also comprises the civil power/oily machine change over switch that is used for switching between mains-supplied and the power supply of oily machine, and described civil power/oily machine change over switch is connected between power input and the lightning-protection module.
The lightning protection module of described three-phase intelligent type safety electricity consumption protector comprises three groups of one-level lightning protection devices and the secondary lightning protection device of being located at respectively between every live wire and the zero line, and described one-level lightning protection device is full mould protected mode, and described secondary lightning protection device is the L-N protected mode.
The DC voltage-stabilizing module of described three-phase intelligent type safety electricity consumption protector comprises rectification circuit and Switching Power Supply; described rectification circuit comprises half-wave rectifying circuit and full-wave rectifying circuit; the DC voltage-stabilizing module also comprises the first relay R EY1 that is switched by the control unit module controls between half-wave rectifying circuit and full-wave rectifying circuit, described half-wave rectifying circuit wherein also is provided with the second relay R EY2 of controlled unit module control break-make between live wire and the first relay R EY1.
The detection module of described three-phase intelligent type safety electricity consumption protector comprised/under-voltage detection module, short circuit/overload detection module and detection of electrical leakage module.
Described mistake/under-voltage detection module comprises gathers the voltage acquisition portion that handles with voltage regulation filtering to the voltage of zero line respectively to three live wires of three-phase alternating-current supply input, and the signal of voltage acquisition portion output is amplified and be input to the operational amplifier of the corresponding port of control unit module respectively.
Described short circuit/overload detection module comprises respectively gathers the current acquisition portion that handles with voltage regulation filtering to three live wire electric currents of three-phase alternating-current supply, and the signal of current acquisition portion output is amplified and be input to the operational amplifier of the corresponding port of control unit module respectively.
Described detection of electrical leakage module comprises gathers the leakage current collection portion that handles with voltage regulation filtering to the induction leakage current of three-phase current power supply, and the signal of leakage current collection portion output is amplified and be input to the operational amplifier of the corresponding port of control unit module respectively.
Described three-phase intelligent type A.C. distribution box also comprises voltage display module and electric current display module.
The utility model has the advantages that:
1. mainly be applicable to the three-phase alternating current distribution of mobile base station, microwave station and other communications equipment room.
2. the three-phase intelligent type safety electricity consumption protector of the utility model employing has the mainly defencive function of electric fault such as overvoltage, under voltage, overload, short circuit, electric leakage; and have functions such as Fault Identification, faulty indication, the detection of combined floodgate prior fault, remote monitoring, online modification parameter and software upgrading; compare with traditional electricity protection switch; electric shock of the collection person and equipment earth leakage protective and unattended operation automatic reclosing are one; safeguard function is more comprehensive, and is more secure and reliable to use.
3. the utility model is used three-phase intelligent type safety electricity consumption protector and thunder resisting equipment, when detecting the overvoltage that causes because of thunderbolt or overcurrent, the protection switch trip protection, and after the thunderbolt, detect supply line and recover just often, protection switch can restore electricity by automatic reclosing; Therefore the utility model has fundamentally been eliminated the contradiction that exists between electricity protection switch and the lightning-protected product, can really realize the unattended management of power use, further guarantees the Electrical Safety of outdoor power consumption equipment.
4. the utility model also is provided with power supply two-way selector switch, can conveniently realize the switching of civil power and oily machine duplex feeding power supply.
5. the utility model adopts ABB lightning protection air switch, has the effect of good overcurrent, overtemperature protection lightning-protection module, makes the lightning-protection module protection more effective.
6. the utility model is furnished with standard communication interface, can realize functions such as remote signalling, remote measurement, remote regulating, remote control, convenient realization telemanagement.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is the basic structure block diagram of three-phase intelligent type A.C. distribution box of the present utility model;
Fig. 2 is the detailed block diagram of three-phase intelligent type A.C. distribution box of the present utility model;
Fig. 3 is the structured flowchart of three-phase intelligent type safety electricity consumption protector of the present utility model;
Fig. 4 is the circuit theory diagrams of the lightning protection module of three-phase intelligent type safety electricity consumption protector of the present utility model;
Fig. 5 is the circuit theory diagrams of the one-level lightning protection device of three-phase intelligent type safety electricity consumption protector of the present utility model;
Fig. 6 is the circuit theory diagrams of the I plate of three-phase intelligent type safety electricity consumption protector of the present utility model;
Fig. 7 is the circuit theory diagrams of the II plate of three-phase intelligent type safety electricity consumption protector of the present utility model.
Wherein: 1 lightning-protection module; 10 lightning protection air switches; 11 lightning protection circuits; 2 three-phase intelligent type safety electricity consumption protectors; 21 main switches; 22 control unit modules; 23 detection modules; 231 mistakes/under-voltage detection module; 232 short circuits/overload detection module; 233 detection of electrical leakage modules; 24 lightning protection modules; 25 remote communication module; 26 DC voltage-stabilizing modules; 27 modules of adjusting; 28 display modules; 29 drive circuit modules; 3 branch switches; 4 civil powers/oily machine change over switch; 5 voltage display modules; 6 electric current display modules.
Embodiment
Embodiment: present embodiment is the specific (special) requirements that can enter the distribution box in place to the layman according to the GB7251.3 standard, and GB7251.11997 low-voltage complete switch equipment and control appliance national standard and the low-voltage distribution apparatus designed and developed.
The three-phase intelligent type A.C. distribution box of present embodiment as shown in Figure 1, comprise power input, lightning-protection module 1, electricity protection module and some branch switches 3, described electricity protection module is a three-phase intelligent type safety electricity consumption protector 2, as shown in Figure 3, comprise the main switch 21 that is series between the three-phase alternating-current supply input and output side, the control unit module 22 of control main switch 21 break-makes, the abnormality of AC power is monitored and is fed back to the detection module 23 of control unit module 22, be located at the lightning protection module 24 of three-phase alternating-current supply input, between control unit module 22 and remote monitoring platform, transmit the remote communication module 25 of data and each module of safety electricity consumption protector of giving of lightning protection module 24 outputs connection the DC voltage-stabilizing module 26 of working power is provided; Described lightning-protection module 1 is connected in parallel between the every live wire and zero line between power input and the three-phase intelligent type safety electricity consumption protector 2, and the output of described three-phase intelligent type safety electricity consumption protector 2 connects some branch switches 3.Power input be civil power input (380V, 50Hz), perhaps be oily dynamo-electric source import (380V, 50Hz).
Lightning-protection module 1 comprises lightning protection air switch 10 and lightning protection circuit 11 two parts, and lightning protection air switch 10 is connected before the input of lightning protection circuit 11.Between every live wire and the zero line, just be connected with a lightning-protection module 1, have 3 lightning-protection modules 1 in the present embodiment.Under normal operation; lightning protection air switch 10 remains closed conducting; when the power input of the distribution box of present embodiment has thunder and lightning to invade; the voltage at lightning protection circuit 11 two ends raises rapidly, lightning protection circuit is started, over the ground leakage current; and the voltage clamp at its two ends put below 2500V; and the lightning protection module in three-phase intelligent type safety electricity consumption protector 2 24 carries out secondary and releases, and residual voltage is controlled at below the 1200V, and the rear end power supply is implemented protection.When lightning protection circuit occurring because of thunderbolt energy excessive (surpass lightning-protection module degree of protection) or when useful life of surpassing lightning-protection module service life causing lightning-protection module to lose efficacy, lightning protection air switch 10 disconnects, and protection lightning protection circuit 11 is avoided damaging.Present embodiment adopts the ABB lightning protection air switch of function admirable.Lightning protection air switch 10 and lightning protection circuit 11 are prior art all, repeat no more.
The module of most critical is a three-phase intelligent type safety electricity consumption protector 2 in the three-phase intelligent type A.C. distribution box.The lightning protection module 24 of three-phase intelligent type safety electricity consumption protector 2 comprises three groups of one-level lightning protection devices and the secondary lightning protection device of being located at respectively between every live wire and the zero line; described one-level lightning protection device is full mould protected mode (L-N, L-PE and N-PE), and described secondary lightning protection device is the L-N protected mode.Adopt the design of 3+1 lightning protection, improved maximum discharge current and voltage protection level, reach C level lightning protection level, make safety electricity consumption protector stronger the inhibition ability that thunder and lightning disturbs.
The remote communication module 25 of three-phase intelligent type safety electricity consumption protector 2 is a remote communication interface.Described remote communication interface is the RS485 communication interface of being located on the control unit module 22, adopt the MODBUS agreement, send all data acquisition amounts, switching value to monitor supervision platform, can carry out remote monitoring to supply line and load, convenient realization remote signalling, remote measurement, remote regulating, remote control, simultaneously, also online upgrading of the present utility model can be realized, remote monitoring and Long-distance Control can be realized.
The DC voltage-stabilizing module 26 of three-phase intelligent type safety electricity consumption protector 2 comprises rectification circuit and Switching Power Supply; described rectification circuit comprises half-wave rectifying circuit and full-wave rectifying circuit; described rectification circuit also comprises by control unit module 22 and is controlled at the first relay R EY1 that switches between half-wave rectifying circuit and the full-wave rectifying circuit, and described half-wave rectifying circuit wherein also is provided with the second relay R EY2 of controlled unit module 22 control break-makes between live wire and the first relay R EY1.After three-phase alternating-current supply is connected; rectification circuit at first carries out rectification to alternating current; power to Switching Power Supply after making it to become direct current; Switching Power Supply get electric after; output two-way direct voltage; one the tunnel to other module for power supply except lightning protection module 24 on the safety electricity consumption protector, and another road provides operation voltage for the relay of main switch 21.
The detection module 23 of three-phase intelligent type safety electricity consumption protector 2 comprised/under-voltage detection module 231, short circuit/overload detection module 232 and detection of electrical leakage module 233.
Described mistake/under-voltage detection module 231 comprises gathers the voltage acquisition portion that handles with voltage regulation filtering to the voltage of zero line respectively to three live wires of three-phase alternating-current supply input, and the signal of voltage acquisition portion output is amplified and be input to the operational amplifier of the corresponding port of control unit module 22 respectively.When detected voltage was excessive or too small, the control unit module can be exported control signal corresponding and carry out overvoltage or under-voltage protection:
1) overvoltage protection: equipment is burnt out; The overvoltage protection of three-phase intelligent safety electricity consumption protector 2 is failure to actuate during smaller or equal to 0.9 times of overvoltage operation voltage setting value at input voltage, should delay time during more than or equal to 1.1 times of overvoltage operation voltage setting values and move in 2 minutes, the protector tripping operation is cut off the electricity supply, and " overvoltage " indicator light is bright; After the three-phase intelligent safety electricity consumption protector carried out the overvoltage fault trip, if the overvoltage fault is eliminated, then three phase mains automatic reclosing power supply protector closed a floodgate when meeting voltage smaller or equal to 0.9 overvoltage operation voltage setting value condition to voltage self check 2 minutes; Do not meet and do not close a floodgate.The three-phase intelligent safety electricity consumption protector protection value of overvoltage can being adjusted is adjusted and is 297V, 264V or 242V.
2) under-voltage protection: cause the equipment frequent starting during brownout easily, cause device damage; The under voltage protection of three-phase intelligent safety electricity consumption protector 2 is failure to actuate during more than or equal to 1.1 times of low-voltage voltage setting values at voltage, should delay time during smaller or equal to 0.9 times of low-voltage voltage setting value and move in 2 minutes, the protector tripping operation is cut off the electricity supply, and " under-voltage " indicator light is bright; After the three-phase intelligent safety electricity consumption protector carried out under-voltage fault trip, if under-voltage fault is eliminated, then three phase mains automatic reclosing power supply protector closed a floodgate when meeting voltage more than or equal to 1.1 low-voltage voltage setting value conditions to voltage self check 2 minutes; Do not meet and do not close a floodgate.The three-phase intelligent safety electricity consumption protector protection value of under voltage can being adjusted is adjusted and is 198V, 176V or 154V.
Described short circuit/overload detection module 232 comprises respectively gathers the current acquisition portion that handles with voltage regulation filtering to three live wire electric currents of three-phase alternating-current supply, and the signal of current acquisition portion output is amplified and be input to the operational amplifier of the corresponding port of control unit module 22 respectively.When detected electric current carries or during short circuit, control unit module 22 can the output control signal corresponding be carried out overload or short-circuit protection:
1) overload protection: load current is crossed conference and is caused supply line's heating, thereby causes fire; The overload protection of three-phase intelligent safety electricity consumption protector is failure to actuate smaller or equal to In (rated current of adjusting) time when electric current; time-delay action after 3 seconds during more than or equal to 1.15 times In (rated current of adjusting); the protector tripping operation is cut off the electricity supply, and " overload " indicator light is bright.
2) short-circuit protection: the short-circuit protection of three-phase intelligent safety electricity consumption protector is failure to actuate during smaller or equal to 2.7 times In at electric current, and during more than or equal to 3 times In 3 times, protector trips immediately, cuts off the electricity supply, and " short circuit " indicator light is bright.Tripping operation operate time≤0.1 second.The three-phase intelligent safety electricity consumption protector detects short circuit carry out trip protection after, will be no longer automatic reclosing, solve the fault that power supply exists until the attendant, and after definite fault gets rid of, could close a floodgate.
Described detection of electrical leakage module 233 comprises gathers the leakage current collection portion that handles with voltage regulation filtering to the induction leakage current of three-phase current power supply, and the signal of leakage current collection portion output is amplified and be input to the operational amplifier of the corresponding port of control unit module 22 respectively.The earth leakage protective electric current of three-phase intelligent safety electricity consumption protector was failure to actuate smaller or equal to 0.9I Δ n (I Δ n is the residual operating current of adjusting) time; during more than or equal to 1.1I Δ n, protector trips immediately, cuts off the electricity supply; " electric leakage " indicator light is bright, and the operate time of tripping was less than 0.05 second.
Detect before closing a floodgate: the intelligent power utilization protector can detect supply line before combined floodgate, if supply line's fault is not got rid of, protector does not close a floodgate, and alarms simultaneously; Fault is not closed a floodgate without eliminating, has stoped the generation of accident before accident takes place.
During use, because of after faults such as overload, electric leakage cause protector tripping operation, protector closes a floodgate 6 times for first section, and be 5 minutes detection time, and second section is closed a floodgate 6 times, and be 10 minutes detection time, and the 3rd section is closed a floodgate 5 times, and be 30 minutes detection time, after this no longer closes a floodgate.Behind any once combined floodgate, can keep 1 minute, assert and close a floodgate successfully the metering zero clearing.Each parameter can be set as required in the technique scheme, and the concrete numerical value of quoting only is used for understanding more easily technical scheme, can not be used for limiting protection range of the present utility model.
Three-phase intelligent type safety electricity consumption protector 2 is except above-mentioned main modular, and its control unit module 22 also is connected with the drive circuit module 29 that drives the main switch action.Control unit module 22 also is connected with the module 27 of adjusting, and comprises current calibration module and the voltage module of adjusting.Described current calibration module comprises rated current module and the residual operating current module of adjusting of adjusting.The described rated current module of adjusting can be adjusted rated current and is many grades of values not of uniform size, can select rated current by many gears, and the scope of application is extensively flexible.The described residual operating current module of adjusting can be adjusted residual operating current and shielded into many grades of values not of uniform size or with creepage protection function.The described voltage module of adjusting comprises under-voltage adjust module and the overvoltage module of adjusting, and can set overvoltage protection value and under voltage protection value respectively.
In addition; three-phase intelligent type safety electricity consumption protector 2 also comprises the display module 28 that is connected with control unit module 22; can the running status and the fault type of safety electricity consumption protector be shown, monitor more easily and maintenance more efficiently with convenient monitoring and maintenance personal.
The concrete course of work of present embodiment is as follows:
At first, three-phase power input end is received the input of lightning protection module 24 by the three-phase four-wire system connection, as shown in Figure 4, and L1, L2, the L3 line of starting to exchange fire, N connecting to neutral line.The input power supply adopts two-stage lightning protection mode, and one-level lightning protection device employing piezo-resistance and discharge tube are formed full mould protected mode (L-N, L-PE and N-PE) and carried out the lightning surge protection, see Fig. 5, and discharging current reaches 20kA (8/20us); The secondary lightning protection device adopts piezo-resistance and discharge tube to be composed in series the L-N protected mode, carries out the lightning surge protection, and discharging current reaches 6kA (8/20us), sees Fig. 4.Like this, after the power supply process lightning protection module 24, be connected to I plate circuit shown in Figure 6 by the J1 terminal again.
As shown in Figure 6, power supply inserts I plate circuit by the J1 terminal, power on for the first time, the half-wave rectifying circuit of connecting because of the first relay R EY1 of forming by diode ID1, ID3, so, by the DC power supply of coming, open switch J3 earlier, give the Switching Power Supply (not shown) by the J2 terminal with the DC power supply of rectification again through diode ID1, ID3 halfwave rectifier.Switching Power Supply get electric after, output two-way direct voltage, one road voltage is the VCC of 5V, provides each module of protector required operating voltage thus; Another road voltage is 12V, and the operation voltage of actuator's relay is provided thus.
After control unit module 22 is started working, will judge the size of the work exchange voltage of input this moment automatically, if operating voltage is during less than set point US1, the first relay R EY1 switches to the full-wave rectifying circuit of being made up of rectifier bridge heap D1, D2 and D3, and the formation that is superimposed after through three rectifier bridges heaps D1, D2, D3 rectification of three-phase operating voltage offers the operating voltage of Switching Power Supply; If the working volts alternating current of input is greater than set point US1 during less than set point US2, the first relay R EY1 switches to the half-wave rectifying circuit powering mode immediately, the second relay R EY2 switches on the diode ID2 halfwave rectifier circuit, and supply with Switching Power Supply power supply by the voltage that ID1, ID2, the rectification simultaneously of three diodes of ID3 superpose again this moment; If the alternating voltage of input is during greater than definite value US2, the first relay R EY1 remains on half-wave rectifying circuit, and this moment, the second relay R EY2 was in off-state, and only the voltage of being come by diode ID1, ID3 rectification is supplied with Switching Power Supply.The control signal RELAY1 of control unit module 22 controls the first relay R EY1, control signal RELAY2 controls the second relay R EY2, under different operating voltage situations, control the first relay R EY1 and between half-wave rectifying circuit power supply and full-wave rectifying circuit power supply, switch, control the second relay R EY2 and a live wire is connected with the first relay R EY1 or disconnects.
In Fig. 6; the voltage sampling circuit of described mistake/under-voltage detection module 231 from three live wires gathering ac input end respectively to the voltage of zero line (L1-N, L2-N, L3-N); after the resistance R 3 on the I plate, R4, R5 dividing potential drop; come image data by voltage transformer T1, T2 and T3 transformation again; collect signal voltage through sampling resistor R6, R8, R10 respectively; capacitor C 1 on the I plate, C2, C3 filtering and voltage stabilizing didoe D7, D8, D9 protection is connected on the II plate of Fig. 7 through the J6 terminal as signal UAA, UBB, UCC after raising level by VREF afterwards.Above-mentioned signal UAA, UBB, UCC operational amplifier U8A, U8B, the U8C on the II plate follows amplification, and output voltage acquired signal UA, UB, UC are to the respective input mouth of the single-chip microcomputer U5 of control unit module.In a single day voltage detecting circuit detects supply voltage and loses suddenly, and system can utilize the dump energy of Switching Power Supply to disconnect main switch relay (not shown) immediately.
Three 220V power lines of ac power output pass the current transformer (not shown) respectively; the CON1 terminal of mutual inductor sensor current signal on the II plate inserts described short circuit/overload detection module 232; the sampling resistor R1 of short circuit on the II plate/overload detection module 232; R8; after R15 carries out voltage sample; capacitor C 1 on the II plate; C2; C3 carries out filtering and voltage stabilizing didoe TV1; TV2; the TV3 protection is raised level by VREF; through operational amplifier U1A; U1B; U1C; U1D; U2A; U2B amplifies; output current acquired signal IA1; IA2; IB1; IB2; IC1; IC2 gives single-chip microcomputer U5 and handles.
Four power lines of ac power output pass electric leakage instrument transformer (not shown) simultaneously; the CON1 terminal of mutual inductor induction leakage current signal on the II plate inserts described detection of electrical leakage module 233; after the sampling resistor R22 of detection of electrical leakage module 233 carries out voltage sample; carry out filtering and voltage stabilizing didoe TV4 protection through capacitor C 4 and raise level by VREF; U2C amplifies through operational amplifier; output leakage current acquired signal IN1 gives single-chip microcomputer U5 and handles.
Three live wires are received respectively on three contacts of main relay (not shown) of main switch 1, and two diode D5, D6 on the I plate constitute the main relay protective circuits.The single-chip microcomputer U5 of the controlled unit module 22 of the main relay of main switch control, control signal DOUT1, the DOUT2 that is specially the single-chip microcomputer U5 output on the II plate after optocoupler OP1 and OP2 isolate respectively through Q5, Q6 triode drive circuit, controlled signal OUT1 and OUT2, be connected to the auxiliary contact of main relay (not shown) by the terminal CON2 on the II plate, with+12V and main relay coil formation loop, main relay adhesive during the OUT1 low level, energized; During the OUT2 low level, main relay disconnects, and cuts off the electricity supply.
The II plate of Fig. 7 is got the operating voltage of VCC as single-chip microcomputer U5, and extraction output current acquired signal IA1, IA2, IB1, IB2, IC1, IC2, leakage current acquired signal IN1, output voltage acquired signal UA, UB, UC is to the data acquisition port of single-chip microcomputer U5, carry out judgment processing by single-chip microcomputer U5 to collecting data message, single-chip microcomputer U5 output control signal is through optocoupler OP1, OP2, OP3, OP4 isolates, again through respectively by the triode Q5 of drive circuit module 9, Q6, Q11, Q12 is connected to the I plate by the CON2 terminal, in order to the control main relay, the break-make of first relay and second relay.
The rated current of current calibration module can be set by code switch K1; when this code switch pushes 0 and 1 gear; the current protection value is a closed condition, and when code switch pushed 2 and 3 gear, the current protection value was 70A; when code switch pushes 4 and 5 gear; the current protection value is 80A, and when code switch pushed 6 and 7 gear, the current protection value was 90A; when code switch pushed 8 and 9 gear, the current protection value was 100A.
The electric leakage operating value of current calibration module can be set by code switch K2; when this code switch pushes 0 gear; the earth leakage protective value is a closed condition; when code switch pushes 1 gear; the earth leakage protective value is 100mA, and when code switch pushed 2 gear, the earth leakage protective value was 120mA; when code switch pushes 3 gear; the earth leakage protective value is 140mA, and when code switch pushed 4 gear, the earth leakage protective value was 150mA; when code switch pushes 5 gear; the earth leakage protective value is 160mA, and when code switch pushed 6 gear, the earth leakage protective value was 170mA; when code switch pushes 7 gear; the earth leakage protective value is 180mA, and when code switch pushed 8 gear, the earth leakage protective value was 190mA; when code switch pushed 9 gear, the earth leakage protective value was 200mA.
Among Fig. 7, the described voltage module of adjusting comprises under-voltage adjust module and the overvoltage module of adjusting.Can set overvoltage and under voltage value by toggle switch: when SEL1 is a low level, when SEL2 was high level, corresponding overvoltage value was 242V, and the under voltage value is 198V; When SEL1 and SEL2 were high level, corresponding overvoltage value was 264V, and the under voltage value is 176V; When SEL1 is a high level, when SEL2 was low level, corresponding overvoltage value was 297V, and the under voltage value is 154V.
Button KEY1～KEY4, J1 terminal constitute the loop by direct-current working volts VCC, pull-up resistor and single-chip microcomputer U5 port, when button is pressed, are low level at single-chip microcomputer U5 port, and single-chip microcomputer U5 detected corresponding key and was pressed this moment; Watchdog circuit is made up of chip U7 and two pull-up resistors, in case single-chip microcomputer U5 work goes wrong, not to the continuous WDI signal of chip U7 output, then U7 will be by the reset signal of 6 pin output RESET, after electric capacity E3 filtering, be input to the reseting port of single-chip microcomputer U5, single-chip microcomputer U5 is resetted, guarantee the normal operation of single-chip microcomputer U5.Crystal oscillator XCAL1 and capacitor C 15, C14 have constituted the crystal oscillating circuit of single-chip microcomputer U5, and the frequency of oscillation of 16MHz is provided for single-chip microcomputer U5.The storage that outage is preserved realizes the storable function of power down in chip U6.
Start and various protection with three-phase intelligent type safety electricity consumption protector 2 is example below, and the course of work of protector is described further:
Start: J3 closes a switch; connect the protector power supply; protector carries out self check: single-chip microcomputer U5 reads voltage, electric current, electric leakage sampled data, and makes corresponding judgment processing, if power supply (voltage, electric current, electric leakage are all in normal range (NR)) is normal; single-chip microcomputer U5 sending controling instruction OUT1 low level is to the main relay (not shown); the main relay adhesive, protector main switch 1 energized is in this process; power supply indicator flicker 5 seconds, power supply indicator is long bright behind the power connection.
Under-voltage protection: single-chip microcomputer U5 reads three-phase voltage U A; UB; the UC sampled data; when three-phase mains voltage all takes place under-voltage; the three-phase voltage value is all less than the under-voltage protection value of setting in the U5 processor program; be set in the gear of 154V such as the under-voltage protection value; voltage is during less than 154V; monitor the duration of this value; when time during less than 120 seconds, protector is failure to actuate, and keeps the work at present state; when the time surpasses 120 seconds; single-chip microcomputer U5 sending controling instruction OUT2 (low level) is to main relay, and main relay disconnects, and cuts off the electricity supply; single-chip microcomputer U5 is with LED4 simultaneously; LED6 puts low level, and under-voltage indicator light and separating brake lamp are all lighted.Single-chip microcomputer U5 gathers the three-phase voltage data according to the time, still be in under-voltage condition if detect these data, single-chip microcomputer U5 continues sending controling instruction OUT2 (low level) to main relay, main relay keeps disconnecting, after in detecting three voltages, having phase voltage data normal, single-chip microcomputer U5 sending controling instruction OUT1 (low level) is to main relay, the main relay adhesive, energized, single-chip microcomputer U5 puts high level with LED4, LED6 simultaneously, under-voltage indicator light and separating brake lamp all extinguish, and LED7 is put low level, light the combined floodgate lamp.
Overvoltage protection: single-chip microcomputer U5 reads three-phase voltage U A; UB; the UC sampled data; when three-phase mains voltage has one overvoltage takes place mutually; one phase voltage value is arranged greater than the overvoltage protection value of setting in the U5 processor program in the three-phase voltage value; be set in the gear of 297V such as the overvoltage protection value; sampled voltage is during greater than 297V; monitor the duration of this value; when time during less than 120 seconds, protector is failure to actuate, and keeps the work at present state; when the time surpasses 120 seconds; single-chip microcomputer U5 sending controling instruction OUT2 (low level) is to main relay, and main relay disconnects, and cuts off the electricity supply; single-chip microcomputer U5 is with LED5 simultaneously; LED6 puts low level, and overvoltage indicator light and separating brake lamp are all lighted.Single-chip microcomputer U5 gathers the three-phase voltage data according to the time, still be in overvoltage condition if detect these data, single-chip microcomputer U5 continues sending controling instruction OUT2 (low level) to main relay, main relay keeps disconnecting, after in detecting three voltages, having phase voltage data normal, single-chip microcomputer U5 sending controling instruction OUT1 (low level) is to main relay, the main relay adhesive, energized, single-chip microcomputer U5 puts high level with LED5, LED6 simultaneously, overvoltage indicator light and separating brake lamp all extinguish, and LED7 is put low level, light the combined floodgate lamp.
Earth leakage protective: single-chip microcomputer U5 reads leakage current IN1 sampled data; when power supply takes place electric leakage and electrical leakage greater than 30mA; the IN1 value is greater than the earth leakage protective value of setting in the U5 processor program; single-chip microcomputer U5 sending controling instruction OUT2 (low level) is to main relay; main relay disconnects; cut off the electricity supply, single-chip microcomputer U5 puts low level with LED3, LED6 simultaneously, and electric leakage indicator light and separating brake lamp are all lighted.(be 5 minutes 6 detection times as first section of protector to single-chip microcomputer U5 according to the time of setting; be 10 minutes 6 detection times of second period; be 30 minutes 5 detection times of the 3rd period; after this; no longer detect; also no longer close a floodgate) collection IN1 data; still be in the electric leakage state if detect these data; single-chip microcomputer U5 continues sending controling instruction OUT2 (low level) to main relay; main relay keep to disconnect, when detect the IN1 data normal after, single-chip microcomputer U5 sending controling instruction OUT1 (low level) is to main relay; the main relay adhesive; energized, single-chip microcomputer U5 is with LED3 simultaneously; LED6 puts high level, and electric leakage indicator light and separating brake lamp all extinguish; LED7 is put low level, light the combined floodgate lamp.
Overload protection: single-chip microcomputer U5 reads current sampling data IA1 respectively; IA2; IB1; IB2; IC1; IC2; when the power source loads electric current excessive; the difference of IA1 and IA2; the difference of IB1 and IB2; phase current values in the difference value of IC1 and IC2 is greater than the overload protection value of setting in the U5 processor program (it is fixed that this value will be come according to the rotation gear of code switch on the panel); single-chip microcomputer U5 sending controling instruction OUT2 (low level) is to main relay; main relay disconnects; cut off the electricity supply; single-chip microcomputer U5 is with LED2 simultaneously; LED6 puts low level, and overload light and separating brake lamp are all lighted.(be 5 minutes 6 detection times that protector is first period to single-chip microcomputer U5 according to the time of setting; be 10 minutes 6 detection times of second period; be 30 minutes 5 detection times of the 3rd period; after this; no longer detect; also no longer close a floodgate) collection IA1; IB1; the IC1 data; still be in overload if detect these data; single-chip microcomputer U5 continues sending controling instruction OUT2 (low level) to main relay; main relay keeps disconnecting, when detecting IA1; IB1; after having a phase current image data normal among the IC1, single-chip microcomputer U5 sending controling instruction OUT1 (low level) is to main relay; the main relay adhesive; energized, single-chip microcomputer U5 is with LED2 simultaneously; LED6 puts high level, and electric leakage indicator light and separating brake lamp all extinguish; LED7 is put low level, light the combined floodgate lamp.
Short-circuit protection: single-chip microcomputer U5 reads IA1, IA2, IB1, IB2, IC1, IC2 current sampling data respectively; when the power source loads electric current excessive; phase current values in the difference value of the difference of the difference of IA1 and IA2, IB1 and IB2, IC1 and IC2 is greater than the short-circuit protection value of setting in the U5 processor program; single-chip microcomputer U5 sending controling instruction OUT2 (low level) is to main relay; main relay disconnects; cut off the electricity supply; single-chip microcomputer U5 puts low level with LED1, LED6 simultaneously, and short circuit indicator light and separating brake lamp are all lighted.Single-chip microcomputer U5 no longer closes a floodgate, and needs manual reset this moment.
The another detailed structure view of present embodiment as shown in Figure 2, three-phase intelligent type A.C. distribution box also comprises the civil power/oily machine change over switch 4 that is used for switching between mains-supplied and the power supply of oily machine, described power input comprises mains supply input and oily dynamo-electric source input, and civil power/oily machine change over switch 4 is connected between power input and the lightning-protection module 1.
Preferably, civil power/oily machine change over switch 4 adopts the armstrong's patent change over switch, and load current is bigger, better reliability.
If select for use the civil power input (to exchange 380V, frequency 50Hz), manually civil power/oily machine change over switch 4 is switched to and connect the mains supply input, mains supply outputs to branch switch 1, branch switch 2, branch switch 3 respectively through three-phase intelligent type safety electricity consumption protector 2 again behind civil power/oily machine change over switch, power to base station equipment;
If mains failure; select oily machine input for use; manually civil power/oily machine change over switch 4 is switched to and connect oily dynamo-electric source input; the dynamo-electric source of oil (exchanges 380V; frequency 50Hz) behind civil power/oily machine change over switch, outputs to branch switch 1, branch switch 2, branch switch 3 respectively through three-phase intelligent type safety electricity consumption protector 2 again, power to base station equipment.Adopt the distribution box after this kind structure to make things convenient for power supply to switch, reduced the interruption duration of equipment, the normal operation of support equipment.
In addition, the A.C. distribution box of present embodiment also comprises power supply indicator, be connected in respectively in the circuit of two-way power supply, can correctly indicate the operating state of power supply, when double loop power supply is powered, can clearly indicate is which road power supply is being powered, and maintains easily the operating state that personnel in time understand equipment.
Can also be connected with electric current display module 6 on the live wire of the three-phase alternating current distribution box of present embodiment, as ammeter, show the operating current of current device, can also between live wire and zero line, be connected with voltage display module 5, as the voltage A.C. voltmeter, the operating voltage of indication current device.
The above only is a preferred embodiment of the present utility model, can not limit the scope that the utility model is implemented with this, and all simple conversion of doing according to the utility model claim and description all should still belong to protection range of the present utility model.
Claims (10)
1. three-phase intelligent type A.C. distribution box, comprise power input, lightning-protection module (1), electricity protection module and some branch switches (3), it is characterized in that: described electricity protection module is a three-phase intelligent type safety electricity consumption protector (2), comprises the main switch (21) that is series between the three-phase alternating-current supply input and output side, the control unit module (22) of control main switch (21) break-make, the abnormality of AC power is monitored and is fed back to the detection module (23) of control unit module (22), be located at the lightning protection module (24) of three-phase alternating-current supply input, between control unit module (22) and remote monitoring platform, transmit the remote communication module (25) of data and each module of safety electricity consumption protector of giving of lightning protection module (24) output connection the DC voltage-stabilizing module (26) of working power is provided; Described lightning-protection module (1) is connected in parallel between the every live wire and zero line between power input and the three-phase intelligent type safety electricity consumption protector (2), and the output of described three-phase intelligent type safety electricity consumption protector (2) connects some branch switches (3).
2. according to the three-phase intelligent type A.C. distribution box described in the claim 1, it is characterized in that: described lightning-protection module (1) comprises lightning protection air switch (10) and lightning protection circuit (11).
3. according to the three-phase intelligent type A.C. distribution box described in the claim 1, it is characterized in that: described power input comprises mains supply input and oily dynamo-electric source input, described three-phase intelligent type A.C. distribution box also comprises the civil power/oily machine change over switch (4) that is used for switching between mains-supplied and the power supply of oily machine, and described civil power/oily machine change over switch (4) is connected between power input and the lightning-protection module (1).
4. three-phase intelligent type A.C. distribution box according to claim 1; it is characterized in that: the lightning protection module (24) of described three-phase intelligent type safety electricity consumption protector (2) comprises three groups of one-level lightning protection devices and the secondary lightning protection device of being located at respectively between every live wire and the zero line; described one-level lightning protection device is full mould protected mode, and described secondary lightning protection device is the L-N protected mode.
5. three-phase intelligent type A.C. distribution box according to claim 1; it is characterized in that: the DC voltage-stabilizing module (26) of described three-phase intelligent type safety electricity consumption protector (2) comprises rectification circuit and Switching Power Supply; described rectification circuit comprises half-wave rectifying circuit and full-wave rectifying circuit; DC voltage-stabilizing module (26) also comprises by control unit module (22) and is controlled at the first relay R EY1 that switches between half-wave rectifying circuit and the full-wave rectifying circuit, and described half-wave rectifying circuit wherein also is provided with the second relay R EY2 of controlled unit module (22) control break-make between live wire and the first relay R EY1.
6. three-phase intelligent type A.C. distribution box according to claim 1 is characterized in that: the detection module (23) of described three-phase intelligent type safety electricity consumption protector (2) comprised/and under-voltage detection module (231), short circuit/overload detection module (232) and detection of electrical leakage module (233).
7. three-phase intelligent type A.C. distribution box according to claim 6, it is characterized in that: described mistake/under-voltage detection module (231) comprises gathers the voltage acquisition portion that handles with voltage regulation filtering to the voltage of zero line respectively to three live wires of three-phase alternating-current supply input, and the signal of voltage acquisition portion output is amplified and be input to the operational amplifier of the corresponding port of control unit module (22) respectively.
8. three-phase intelligent type A.C. distribution box according to claim 6, it is characterized in that: described short circuit/overload detection module (232) comprises respectively gathers the current acquisition portion that handles with voltage regulation filtering to three live wire electric currents of three-phase alternating-current supply, and the signal of current acquisition portion output is amplified and be input to the operational amplifier of the corresponding port of control unit module (22) respectively.
9. three-phase intelligent type A.C. distribution box according to claim 6, it is characterized in that: described detection of electrical leakage module (233) comprises gathers the leakage current collection portion that handles with voltage regulation filtering to the induction leakage current of three-phase current power supply, and the signal of leakage current collection portion output is amplified and be input to the operational amplifier of the corresponding port of control unit module (22) respectively.
10. three-phase intelligent type A.C. distribution box according to claim 1 is characterized in that: also comprise voltage display module (5) and electric current display module (6).
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| CN2009202417860U CN201570904U (en) | 2009-12-16 | 2009-12-16 | Three-phase intelligent alternating current power distribution box |
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| CN2009202417860U CN201570904U (en) | 2009-12-16 | 2009-12-16 | Three-phase intelligent alternating current power distribution box |
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| CN201570904U true CN201570904U (en) | 2010-09-01 |
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| CN109659932A (en) * | 2018-12-19 | 2019-04-19 | 军事科学院系统工程研究院卫勤保障技术研究所 | Three-phrase burden balance formula electric power safeguard system and method for field tent hospital |
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