CN109802486A - A kind of power distribution network low pressure quickly turns power supply unit and connection method - Google Patents
A kind of power distribution network low pressure quickly turns power supply unit and connection method Download PDFInfo
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- CN109802486A CN109802486A CN201910200082.7A CN201910200082A CN109802486A CN 109802486 A CN109802486 A CN 109802486A CN 201910200082 A CN201910200082 A CN 201910200082A CN 109802486 A CN109802486 A CN 109802486A
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- 238000000034 method Methods 0.000 title claims description 12
- 230000001681 protective effect Effects 0.000 claims abstract description 33
- 239000003990 capacitor Substances 0.000 claims description 60
- 238000001514 detection method Methods 0.000 claims description 22
- 230000005611 electricity Effects 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 239000004411 aluminium Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 3
- 230000001012 protector Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The invention discloses a kind of power distribution network low pressure quickly to turn power supply unit and connection type, and the device includes jointing, several low-voltage cables, earth leakage protective device, alarm system；One end of the low-voltage cable is connect with jointing, and the other end of low-voltage cable is connect with earth leakage protective device；The earth leakage protective device includes main switch；The alarm system is connected to the both ends of main switch；One end of the earth leakage protective device passes through low-voltage cable, the external low-pressure line-outgoing that need to stop transformer of jointing by low-voltage cable, the low-pressure line-outgoing of the external offer power supply of jointing, the other end of the earth leakage protective device.The present invention, which is able to achieve, quickly accesses low-voltage circuit, shortens the power off time of user, while when the main switch in earth leakage protective device disconnects, alarm system issues alarm, prompts have short circuit, to more use safely.
Description
Technical field
The present invention relates to grid power technical fields, more particularly to a kind of power distribution network low pressure quickly turns power supply unit
And connection method.
Background technique
In recent years, since urban electricity consumption sharply increases, lead to the individual factors such as scheduled outage and temporary interruption
Bring low-voltage customer power cut problem.In line with the principle of " have a power failure and do not deactivate family, stop family and shorten power off time ", grid company is used
Generator or generator car are implemented to power to low-voltage circuit, when being powered using generator or generator car, during excluding use
The phenomenon that oiling, needing at least to stop two and one-half- hours is overlapped and is removed, and the period is located at morning or dusk, time mistake
It is long.During operation, noise is too big and can exclude the black smog of fuel oil, causes user to have very big opinion to this, increases
The risk of customer complaint.And in old town, there is the phenomenon that being surrounded by neighboring buildings in many transformers, cause generator car or
Generator cannot be introduced into, and in this case, the power off time during causing increases, and increase manpower.
Summary of the invention
The present invention needs to overlap for a long time to solve to use generator or generator car to implement to power to low-voltage circuit at present
And dismounting, the problem that working efficiency is low, power off time is long is caused, a kind of power distribution network low pressure is provided and quickly turns power supply unit and company
Method, energy quick lap joint and dismounting route are connect, working efficiency is provided, power off time is reduced.
To realize aforementioned present invention purpose, the technical solution adopted is as follows: a kind of power distribution network low pressure quickly turns power supply unit,
Including jointing, several low-voltage cables, earth leakage protective device, alarm system；One end of the low-voltage cable and jointing
Connection, the other end of low-voltage cable are connect with earth leakage protective device；The earth leakage protective device includes main switch；The alarm system connects
It connects at the both ends of main switch；The low pressure that one end of the earth leakage protective device passes through low-voltage cable, the external offer power supply of jointing
The other end of outlet, the earth leakage protective device passes through low-voltage cable, the external low-pressure line-outgoing that need to stop transformer of jointing.
It preferably, further include switch-box；The switch-box includes cabinet, chamber door；The setting of the side of the chamber door and cabinet
It can be rotated hinged；The earth leakage protective device, alarm system are fixed in cabinet；The side of the cabinet is logical equipped with several
Hole, side on the other side are equipped with the identical through-hole of quantity；The low-voltage cable passes through through-hole and connect with earth leakage protective device.
Further, the chamber door is arranged to transparent configuration.
Preferably, the jointing uses copper aluminium abnormity parallel groove clamp structure.
Further, the alarm system includes detection circuit, Master control chip MSP430FAE253, power circuit, bee
Ring device warning circuit；The power circuit respectively with detection circuit, Master control chip MSP430FAE253, buzzer alarm circuit
Connection；The Master control chip MSP430FAE253 is connect with detection circuit, buzzer alarm circuit respectively.
Still further, the detection circuit includes 16 channel analog multiplexer CD74HC4067, resistance R1, resistance
R2, photoelectrical coupler PS2505, resistance 33；
1 pin of the photoelectrical coupler PS2505 passes through the anode of resistance R1 connection main switch；
2 pins of the photoelectrical coupler PS2505 pass through the cathode of resistance R2 connection main switch；
3 pins of the photoelectrical coupler PS2505 connect 16 channel analogy multichannels by resistance R33 and answer as output end
With the Y input pin of device CD74HC4067；
4 pins of the photoelectrical coupler PS2505 are grounded by resistance 33, and 4 pins of photoelectrical coupler PS2505 connect electricity
Source circuit, power circuit provide 3.3V power supply；
The S0 pin of the 16 channel analog multiplexer CD74HC4067 connects Master control chip MSP430FAE253
P1.5 pin；
The S1 pin of the 16 channel analog multiplexer CD74HC4067 connects Master control chip MSP430FAE253
P1.1 pin；
The P2.0 pin of the Master control chip MSP430FAE253 meets 16 channel analog multiplexer CD74HC4067
13 pins；
The P2.0 pin of the Master control chip MSP430FAE253 meets 16 channel analog multiplexer CD74HC4067
14 pins；
The P2.0 pin of the Master control chip MSP430FAE253 meets 16 channel analog multiplexer CD74HC4067
15 pins；
The power circuit provides 3.3V power supply to 16 channel analog multiplexer CD74HC4067.
Still further, the buzzer alarm circuit includes buzzer, triode Q31, resistance R31；
One pin of the buzzer is grounded, another pin connects the collector of triode Q31；
The emitter of the triode Q31 connects power circuit；
The base stage of the triode Q31 is connect by resistance R31 with the A0.0 pin of Master control chip MSP430FAE253.
Still further, the power circuit includes power module LH25, capacitor E01, power module WRB4805CS, electricity
Hold E32, inductance L1, capacitor E31, power module B0505LM, resistance R23, capacitor C3, inductance L2, capacitor C4, capacitor Cdi, electricity
Source module SPX3819M5, capacitor C6, capacitor Cdo；
L, N, FG pin of the power module LH25, which respectively corresponds, connects the end alternating current PL, PN, FG；
The V+ pin of the power module LH25 connects the I+ pin of power module WRB4805CS；
The V- pin of the power module LH25 connects the I- pin of power module WRB4805CS；
The V+ pin of the power module LH25 connects the anode of capacitor E01, and the V- pin of the power module LH25 connects electricity
Hold the cathode of E01；
- O the pin of the power module WRB4805CS is grounded, and the anode of the cathode of shunt-wound capacitance E32, capacitor E32 connects electricity
The CS pin of source module WRB4805CS；
+ O the pin of the power module WRB4805CS is connected by the IN pin of inductance L2 and power module SPX3819M5
It connects；
Between the IN pin of end a Jie inductance L2 and power module SPX3819M5 of the capacitor C4, capacitor C4's is another
One end ground connection；
The anode of the capacitor Cdi is connect with the IN pin of power module SPX3819M5, EN pin respectively, capacitor Cdi's
Cathode ground connection；
The OUT pin of the power module SPX3819M5 exports 3.3V power supply, respectively Master control chip
MSP430FAE253, detection circuit provide power supply；
The OUT pin of the power module SPX3819M5 connects the anode of capacitor Cdo, the cathode ground connection of capacitor Cdo；
The RST pin of the power module SPX3819M5 is grounded by capacitor C6；
+ O the pin of the power module WRB4805CS is connect by inductance L1 with the I+ pin of power module B0505LM；
- I the pin of the power module B0505LM is grounded；
The anode of the capacitor E31 connects the+I pin of power module B0505LM, and the cathode of capacitor E31 connects power module
- I the pin of B0505LM；
+ O pin output+the 5V of the power module B0505LM, provides power supply for the first RS485 communication module,
+ O the pin of B0505LM passes through resistance R23, capacitor C3 ground connection respectively.
The present invention also provides the connection method for quickly turning power supply unit based on above-described power distribution network low pressure, the connection sides
Method the following steps are included:
S1: current measurement is carried out to each branch of the voltage device of provided power supply, according to formulaIt calculates each
The load of branch, in formula, U indicates that low-voltage customer voltage 380v, I indicate each branch current；
S2: calculate provide power supply transformer allow by rated current, calculation formula is as follows:
IVolumeThe transformer capacity * 80% of=1.44* offer power supply
S3: the current value that measurement is obtained is compared with being calculated the rated current for providing the transformer of power supply and carrying out, such as
It measures obtained current value and is less than rated current, then the transformer for providing power supply, which can drive, need to stop transformer, otherwise cannot；
S4: it is equal to the load progress that need to stop the total branch of transformer according to the load of each branch for the transformer for providing power supply
Calculate, be provided the transformer of power supply with the access point that need to stop transformer and connect, power distribution network low pressure is quickly turned for Denso
The input terminal set and the access point of transformer for providing power supply are attached, and low pressure quickly turns the output end of power supply unit and need to stop
Transformer is attached.
Preferably, current measurement is carried out using each branch of the clamp meter to the voltage device of provided power supply.
When power distribution network low pressure of the present invention quickly turns the transformer of power supply unit connection offer power supply and need to stop transformer, it need to examine
Consider power distribution network low pressure and quickly turns earth leakage protective device parameters requirement in power supply unit.
Beneficial effects of the present invention are as follows:
1. earth leakage protective device, cable, jointing are arranged to an independent power distribution network low pressure and quickly turn to supply by the present invention
Electric installation, by jointing realize quickly with the low-pressure line-outgoing of power supply, need to stop transformer low-pressure line-outgoing overlap joint, reality of taking out stitches
Low-voltage circuit is now quickly accessed, the power off time of user is shortened.
2. the present invention is equipped with alarm system, when the main switch in earth leakage protective device disconnects, alarm system issues alarm, mentions
It is shown with short circuit, to more use safely.
3. present invention transport and using reduction manpower, the reasonable distribution of personnel is improved, is improved efficiency, while described being matched
Power grid low pressure is noiseless during quickly turning power supply unit use and foreign generates.
Detailed description of the invention
Fig. 1 is that the present embodiment distribution low pressure quickly turns power supply unit.
Fig. 2 is the detection circuit part connection figure in the present embodiment alarm system.
Fig. 3 is detection circuit and Master control chip connection figure in the present embodiment alarm system.
Fig. 4 is the buzzer alarm circuit connection figure in the present embodiment alarm system.
Fig. 5 is the power circuit connection figure in the present embodiment alarm system.
Fig. 6 is the connection figure that the present embodiment power distribution network low pressure quickly turns power supply unit.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and detailed description.
Embodiment 1
As shown in Figure 1, a kind of power distribution network low pressure quickly turns power supply unit, including jointing, several low-voltage cables, leakage
Non-electricity protector, alarm system；One end of the low-voltage cable is connect with jointing, the other end and earth leakage protective of low-voltage cable
Device connection；The earth leakage protective device includes main switch；The alarm system is connected to the both ends of main switch；The earth leakage protective device
One end provide the low-pressure line-outgoing of power supply by the way that low-voltage cable, jointing are external, the other end of the earth leakage protective device passes through
The external low-pressure line-outgoing that need to stop transformer of low-voltage cable, jointing.
Switch-box described in the present embodiment includes cabinet, chamber door；The setting of the side of the chamber door and cabinet can be rotated hinged；Institute
State earth leakage protective device, alarm system is fixed in cabinet；The side of the cabinet is equipped with several through-holes, on the other side
Side is equipped with the identical through-hole of quantity；The low-voltage cable passes through through-hole and connect with earth leakage protective device.
Low-voltage cable described in the present embodiment includes core, insulating layer and protective layer；The core is for conducting electric current, and one
As be twisted by strand copper wire or multiply aluminum steel.The core uses low voltage single core core, the low voltage single core core and gold
The relationship for belonging to shielded layer, can regard the armature winding coil an of transformer and the relationship of iron core as.When low voltage single core core is logical
Magnetic line of force interlinkage aluminium packet or metal screen layer are just had when overcurrent, its both ends is made induced voltage occur.Single-core cable has it
The irreplaceable advantage of its cable, it can bear higher voltage and cheap, easy for installation.
The earth leakage protective device is primarily used to touch when leak current fault occurs for equipment and to the person for having fatal risk
Electric protection has overload and short-circuit protection function, can be used to the overload and short circuit of protection circuit or motor, also can be in positive reason
Infrequently conversion starting under condition as route is used.The earth leakage protective device is used cooperatively with switch-box, is played a protective role.
The chamber door is arranged to transparent configuration, conveniently checks whether main switch is already off.
The jointing uses copper aluminium abnormity parallel groove clamp structure, and the copper aluminium abnormity parallel groove clamp is used for power circuit
The non-endurance of middle conducting wire connects and branch, in order to increase safety, adds insulating boot, insulating boot and copper aluminium abnormity parallel groove clamp
It matches, protection insulating effect is risen to copper aluminium abnormity parallel groove clamp；The copper aluminium abnormity parallel groove clamp is equipped with tooth-shape structure, tool
There is contact resistance small, continues reliable advantage；The copper aluminium abnormity parallel groove clamp is held tightly with circular arc large area, and conducting wire is not easy compacted
The characteristics of change.
As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, the alarm system includes detection circuit, Master control chip
MSP430FAE253, power circuit, buzzer alarm circuit；The power circuit respectively with detection circuit, Master control chip
MSP430FAE253, buzzer alarm circuit connection；The Master control chip MSP430FAE253 respectively with detection circuit, buzzing
The connection of device warning circuit.
As shown in Figure 2 and Figure 3, the detection circuit include 16 channel analog multiplexer CD74HC4067, resistance R1,
Resistance R2, photoelectrical coupler PS2505, resistance 33；
1 pin of the photoelectrical coupler PS2505 passes through the anode of resistance R1 connection main switch；
2 pins of the photoelectrical coupler PS2505 pass through the cathode of resistance R2 connection main switch；
3 pins of the photoelectrical coupler PS2505 connect 16 channel analogy multichannels by resistance R33 and answer as output end
With the Y input pin of device CD74HC4067；
4 pins of the photoelectrical coupler PS2505 are grounded by resistance 33, and 4 pins of photoelectrical coupler PS2505 connect electricity
Source circuit, power circuit provide 3.3V power supply；
The S0 pin of the 16 channel analog multiplexer CD74HC4067 connects Master control chip MSP430FAE253
P1.5 pin；
The S1 pin of the 16 channel analog multiplexer CD74HC4067 connects Master control chip MSP430FAE253
P1.1 pin；
The P2.0 pin of the Master control chip MSP430FAE253 meets 16 channel analog multiplexer CD74HC4067
13 pins；
The P2.0 pin of the Master control chip MSP430FAE253 meets 16 channel analog multiplexer CD74HC4067
14 pins；
The P2.0 pin of the Master control chip MSP430FAE253 meets 16 channel analog multiplexer CD74HC4067
15 pins；
The power circuit provides 3.3V power supply to 16 channel analog multiplexer CD74HC4067.
Detection circuit of the present invention is for judging whether the main switch of earth leakage protective device closes a floodgate, if main switch closes a floodgate, then
Detection circuit is short-circuited, and detection circuit can not work at this time.When main switch disconnects, detection circuit access, photoelectrical coupler
PS2505 is worked normally, and is exported corresponding electric signal transmission and given Master control chip MSP430FAE253.
As shown in figure 4, the buzzer alarm circuit includes buzzer, triode Q31, resistance R31；
One pin of the buzzer is grounded, another pin connects the collector of triode Q31；
The emitter of the triode Q31 connects power circuit；
The base stage of the triode Q31 is connect by resistance R31 with the A0.0 pin of Master control chip MSP430FAE253.
The buzzer alarm circuit, when detection circuit detects that main switch disconnects, illustrates this thing cable for alarming
Occurs short circuit in circuit, buzzer issues alarm sound.
As shown in figure 5, the power circuit includes power module LH25, capacitor E01, power module WRB4805CS, capacitor
E32, inductance L1, capacitor E31, power module B0505LM, resistance R23, capacitor C3, inductance L2, capacitor C4, capacitor Cdi, power supply
Module SPX3819M5, capacitor C6, capacitor Cdo；
L, N, FG pin of the power module LH25, which respectively corresponds, connects the end alternating current PL, PN, FG；
The V+ pin of the power module LH25 connects the I+ pin of power module WRB4805CS；
The V- pin of the power module LH25 connects the I- pin of power module WRB4805CS；
The V+ pin of the power module LH25 connects the anode of capacitor E01, and the V- pin of the power module LH25 connects electricity
Hold the cathode of E01；
- O the pin of the power module WRB4805CS is grounded, and the anode of the cathode of shunt-wound capacitance E32, capacitor E32 connects electricity
The CS pin of source module WRB4805CS；
+ O the pin of the power module WRB4805CS is connected by the IN pin of inductance L2 and power module SPX3819M5
It connects；
Between the IN pin of end a Jie inductance L2 and power module SPX3819M5 of the capacitor C4, capacitor C4's is another
One end ground connection；
The anode of the capacitor Cdi is connect with the IN pin of power module SPX3819M5, EN pin respectively, capacitor Cdi's
Cathode ground connection；
The OUT pin of the power module SPX3819M5 exports 3.3V power supply, respectively Master control chip
MSP430FAE253, detection circuit provide power supply；
The OUT pin of the power module SPX3819M5 connects the anode of capacitor Cdo, the cathode ground connection of capacitor Cdo；
The RST pin of the power module SPX3819M5 is grounded by capacitor C6；
+ O the pin of the power module WRB4805CS is connect by inductance L1 with the I+ pin of power module B0505LM；
- I the pin of the power module B0505LM is grounded；
The anode of the capacitor E31 connects the+I pin of power module B0505LM, and the cathode of capacitor E31 connects power module
- I the pin of B0505LM；
+ O pin output+the 5V of the power module B0505LM, provides power supply for the first RS485 communication module,
+ O the pin of B0505LM passes through resistance R23, capacitor C3 ground connection respectively.
The power circuit is mainly detection circuit, Master control chip MSP430FAE253, buzzer alarm circuit offer
Required working power.
As shown in fig. 6, the present embodiment also provides the connection for quickly turning power supply unit based on above-described power distribution network low pressure
Method, the connection method the following steps are included:
S1: current measurement is carried out using each branch of the clamp meter to the voltage device of provided power supply, according to formula
Calculate the load of each branch, in formula, U indicates that low-voltage customer voltage 380v, I indicate each branch current；
S2: calculate provide power supply transformer allow by rated current, calculation formula is as follows:
IVolumeThe transformer capacity * 80% of=1.44* offer power supply
S3: the current value that measurement is obtained is compared with being calculated the rated current for providing the transformer of power supply and carrying out, such as
It measures obtained current value and is less than rated current, then the transformer for providing power supply, which can drive, need to stop transformer, otherwise cannot；
S4: it is equal to the load progress that need to stop the total branch of transformer according to the load of each branch for the transformer for providing power supply
Calculate, be provided the transformer of power supply with the access point that need to stop transformer and connect, power distribution network low pressure is quickly turned for Denso
The access point of the input terminal set and the transformer for providing power supply is attached, and power distribution network low pressure quickly turns the output end of power supply unit
It is attached with transformer need to be stopped.
For the present embodiment in specific connection, power distribution network low pressure quickly turns the parameters of the earth leakage protective device in power supply unit
The requirement of line current, voltage should be met.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.Any modification done within the spirit and principles of the present invention and changes equivalent replacement
Into etc., it should all be included in the scope of protection of the claims of the present invention.
Claims (10)
1. a kind of power distribution network low pressure quickly turns power supply unit, it is characterised in that: including jointing, several low-voltage cables, leakage
Non-electricity protector, alarm system；One end of the low-voltage cable is connect with jointing, the other end and earth leakage protective of low-voltage cable
Device connection；The earth leakage protective device includes main switch；The alarm system is connected to the both ends of main switch；The earth leakage protective device
One end provide the low-pressure line-outgoing of power supply by the way that low-voltage cable, jointing are external, the other end of the earth leakage protective device passes through
The external low-pressure line-outgoing that need to stop transformer of low-voltage cable, jointing.
2. power distribution network low pressure according to claim 1 quickly turns power supply unit, it is characterised in that: further include switch-box；Institute
Stating switch-box includes cabinet, chamber door；The setting of the side of the chamber door and cabinet can be rotated hinged；The earth leakage protective device, alarm
System is fixed in cabinet；The side of the cabinet is equipped with several through-holes, and it is identical that side on the other side is equipped with quantity
Through-hole；The low-voltage cable passes through through-hole and connect with earth leakage protective device.
3. power distribution network low pressure according to claim 2 quickly turns power supply unit, it is characterised in that: the chamber door is arranged to
Bright structure.
4. power distribution network low pressure according to claim 1 quickly turns power supply unit, it is characterised in that: the jointing uses
Copper aluminium abnormity parallel groove clamp structure.
5. power distribution network low pressure according to claim 1 quickly turns power supply unit, it is characterised in that: the alarm system includes
Detection circuit, Master control chip MSP430FAE253, power circuit, buzzer alarm circuit；The power circuit respectively with inspection
Slowdown monitoring circuit, Master control chip MSP430FAE253, buzzer alarm circuit connection；The Master control chip MSP430FAE253 points
It is not connect with detection circuit, buzzer alarm circuit.
6. power distribution network low pressure according to claim 5 quickly turns power supply unit, it is characterised in that: the detection circuit includes
16 channel analog multiplexer CD74HC4067, resistance R1, resistance R2, photoelectrical coupler PS2505, resistance 33；
1 pin of the photoelectrical coupler PS2505 passes through the anode of resistance R1 connection main switch；
2 pins of the photoelectrical coupler PS2505 pass through the cathode of resistance R2 connection main switch；
3 pins of the photoelectrical coupler PS2505 connect 16 channel analog multiplexers as output end, and by resistance R33
The Y input pin of CD74HC4067；
4 pins of the photoelectrical coupler PS2505 are grounded by resistance 33, and 4 pins of photoelectrical coupler PS2505 connect power supply electricity
Road, power circuit provide 3.3V power supply；
The S0 pin connection Master control chip MSP430FAE253's of the 16 channel analog multiplexer CD74HC4067
P1.5 pin；
The S1 pin connection Master control chip MSP430FAE253's of the 16 channel analog multiplexer CD74HC4067
P1.1 pin；
The P2.0 pin of the Master control chip MSP430FAE253 connects the 13 of 16 channel analog multiplexer CD74HC4067
Pin；
The P2.0 pin of the Master control chip MSP430FAE253 connects the 14 of 16 channel analog multiplexer CD74HC4067
Pin；
The P2.0 pin of the Master control chip MSP430FAE253 connects the 15 of 16 channel analog multiplexer CD74HC4067
Pin；
The power circuit provides 3.3V power supply to 16 channel analog multiplexer CD74HC4067.
7. power distribution network low pressure according to claim 5 quickly turns power supply unit, it is characterised in that: the buzzer warning electricity
Road includes buzzer, triode Q31, resistance R31；
One pin of the buzzer is grounded, another pin connects the collector of triode Q31；
The emitter of the triode Q31 connects power circuit；
The base stage of the triode Q31 is connect by resistance R31 with the A0.0 pin of Master control chip MSP430FAE253.
8. power distribution network low pressure according to claim 5 quickly turns power supply unit, it is characterised in that: the power circuit includes
Power module LH25, capacitor E01, power module WRB4805CS, capacitor E32, inductance L1, capacitor E31, power module
B0505LM, resistance R23, capacitor C3, inductance L2, capacitor C4, capacitor Cdi, power module SPX3819M5, capacitor C6, capacitor
Cdo；
L, N, FG pin of the power module LH25, which respectively corresponds, connects the end alternating current PL, PN, FG；
The V+ pin of the power module LH25 connects the I+ pin of power module WRB4805CS；
The V- pin of the power module LH25 connects the I- pin of power module WRB4805CS；
The V+ pin of the power module LH25 connects the anode of capacitor E01, and the V- pin of the power module LH25 meets capacitor E01
Cathode；
- O the pin of the power module WRB4805CS is grounded, and the cathode of shunt-wound capacitance E32, the anode of capacitor E32 connects power supply mould
The CS pin of block WRB4805CS；
+ O the pin of the power module WRB4805CS is connect by inductance L2 with the IN pin of power module SPX3819M5；
Between the IN pin of end a Jie inductance L2 and power module SPX3819M5 of the capacitor C4, the other end of capacitor C4
Ground connection；
The anode of the capacitor Cdi is connect with the IN pin of power module SPX3819M5, EN pin respectively, the cathode of capacitor Cdi
Ground connection；
The OUT pin output 3.3V power supply of the power module SPX3819M5, respectively Master control chip MSP430FAE253,
Detection circuit provides power supply；
The OUT pin of the power module SPX3819M5 connects the anode of capacitor Cdo, the cathode ground connection of capacitor Cdo；
The RST pin of the power module SPX3819M5 is grounded by capacitor C6；
+ O the pin of the power module WRB4805CS is connect by inductance L1 with the I+ pin of power module B0505LM；
- I the pin of the power module B0505LM is grounded；
The anode of the capacitor E31 connects the+I pin of power module B0505LM, and the cathode of capacitor E31 meets power module B0505LM
- I pin；
+ O pin output+the 5V of the power module B0505LM provides power supply for the first RS485 communication module, B0505LM+
O pin passes through resistance R23, capacitor C3 ground connection respectively.
9. the connection method that a kind of power distribution network low pressure quickly turns power supply unit, it is characterised in that: the connection method includes following step
It is rapid:
S1: current measurement is carried out to each branch of the voltage device of provided power supply, according to formulaCalculate each branch
Load, in formula, U indicates that low-voltage customer voltage 380v, I indicate each branch current；
S2: calculate provide power supply transformer allow by rated current, calculation formula is as follows:
IVolumeThe transformer capacity * 80% of=1.44* offer power supply
S3: the current value that measurement is obtained such as measures compared with the rated current for providing the transformer of power supply is calculated and carries out
Obtained current value is less than rated current, then the transformer for providing power supply, which can drive, need to stop transformer, otherwise cannot；
S4: it is counted according to the load of each branch for the transformer for providing power supply equal to the load that need to stop the total branch of transformer
Calculate, be provided the transformer of power supply with the access point that need to stop transformer and connect, power distribution network low pressure is quickly turned into power supply unit
Input terminal and the access point of transformer of power supply be provided be attached, power distribution network low pressure quickly turn the output end of power supply unit with
It need to stop transformer to be attached.
10. the connection method that power distribution network low pressure according to claim 9 quickly turns power supply unit, it is characterised in that: use
Clamp meter carries out current measurement to each branch of the voltage device of provided power supply.
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| CN209419316U (en) * | 2019-03-15 | 2019-09-20 | 广东电网有限责任公司 | A kind of power distribution network low pressure quickly turns power supply unit |
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