CN109738831A - A kind of electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of band - Google Patents
A kind of electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of band Download PDFInfo
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Abstract
The invention discloses a kind of electrical two self-locking position switch power circuit plate detection circuits of band, it is characterized in that including: pressure regulator and its prime protection circuit and indicating circuit, the conversion switch circuit of DC1/DC2 DC loop input side and DC1/DC2 direct current output circuit.The beneficial effects of the present invention are: 1) with the detection function of two station pressure-adjustables；2) with electrical self-locking function, it can effectively prevent testing staff because just doing caused danger of making mistakes；3) it can be improved the detection efficiency of Switching Power Supply wiring board.
Description
Technical field
The present invention relates to a kind of Switching Power Supply wiring board detection circuits more particularly to a kind of electrical two self-locking stations of band to open
Powered-down source wiring board detection circuit.
Background technique
In power electronic product, for Switching Power Supply as a kind of power supply powered to secondary circuit, function is by high electricity
The forceful electric power of pressure is converted into the light current of low-voltage.Switching Power Supply is essential in electric power electronic module.
The stabilization of Switching Power Supply performance directly affects the stability of power electronic product secondary control loop.Therefore, one
The device that set can directly detect Switching Power Supply is for judging that Switching Power Supply reliability and stability are of great significance.
Apply for low-voltage electrical, voltage class of the present invention is related to 1.2kV Switching Power Supply below.Of the invention
Switching Power Supply detection circuit input voltage be 0~250VAV, output station Power Level be respectively 0~300VDC and 400~
1200VDC。
There is another in the design of two stations output, it is ensured that two stations will not work at the same time.Therefore it needs to design
One electrical self-lock mechanism guarantees the security reliability of detection circuit when in use.
In the prior art, there are no the electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of such band.
Summary of the invention
The technical problems to be solved by the invention are just to provide a kind of electrical two self-locking station pressure-adjusting type Switching Power Supplies of band
Wiring board detection circuit, has the output of two station pressure-adjusting types and can be electrical self-locking, can be effectively to the use process of detection circuit
It is protected.
Above-mentioned technical problem is solved, the technical scheme adopted by the invention is as follows:
A kind of electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of band, it is characterized in that: including successively
Connection pressure regulator and its prime protection circuit and indicating circuit, DC1/DC2 DC loop input side conversion switch circuit and
DC1/DC2 direct current output circuit；
The pressure regulator and its prime protection circuit and indicating circuit are as follows:
The 13rd termination KM13+ terminal, the 5th end with auxiliary contact contactor KM1 connect L terminal, the 1st through second fuse F2
End connects N-terminal through the 4th fuse F4, the 25th termination A1 terminal, the 14th and the 26th terminates that N+ terminal, the 6th end is through third fuse
F3 is followed by the 1st end of pressure regulator TR1, then connects the 2nd end of pressure regulator TR1 with the 2nd end of the 6th end linkage；
Wherein: the 25th end and the 26th end with auxiliary contact contactor KM1 are the both ends of contactor coil, the 5th 3P terminal
1 port of CON5, that is, L terminal, the 2nd port, that is, N-terminal, the 3rd port ground connection；
The conversion switch circuit of the DC1/DC2 DC loop input side are as follows:
The 3rd end of pressure regulator TR1 is connected to the 2nd end and is coupled with the 2nd end (input of the first bridge rectifier D1
End) and the 1st end (input terminal) of 220/1000 pressure regulator T1, the 4th end (pressure regulation output end) be then connected to three feet three keep off ship type open
The 1st end (input terminal) of S2 is closed, the 2nd end (output end) of three feet three gear ship type switch S2 is then connected to the first bridge rectifier D1
The 4th end (another input terminal), the 3rd end (another output end) be then connected to the 2nd end (another input of 220/1000 pressure regulator T1
End) on, the 3rd and the 4th end (two output ends) of 220/1000 pressure regulator T1 is respectively connected to the 1st of third bridge rectifier D3 the
On the 3rd end (two input terminals).
The DC1 direct current output circuit are as follows:
The output at the 1st end of the first bridge rectifier D1 is respectively connected to the first display instrument after first fuse F1
The 3rd end (end I+) of VA1 and the 10th end (end V+), the 3rd end exported respectively to the 14th end (end V-) of the first display instrument VA1 and
2 ports of 2nd 3P terminal CDN2；
The 24th end (end L) of first display instrument VA1 inputs 2 grades of 3 foot of the first green band lamp after the 5th fuse F5 and opens
The 1st end, the 26th end (N-terminal) for closing S1 then connect the 3rd end and the end N+, the 4th end (I- of 3 foot of the first green band lamp, 2 gear switch S1 respectively
End) then it is connected to the 2nd end of the first 3P terminal CDN1；
Wherein: the 2nd end (output end) of 3 foot of the first green band lamp, 2 gear switch S1 is connected on L+ terminal；
Four articles of circuits are parallel between the outlet line at the 1st and the 3rd end of the first bridge rectifier D1: first is in parallel
Circuit be concatenated first and second capacitors C1 and C2, the second shunt circuit be concatenated first and the 5th equalizing resistance R1 and
R5, third shunt circuit be second, third equalizing resistance R2 being sequentially connected in series and R3 and the second green LED diode D2 just
To the 4th shunt circuit brings out for the 3rd into the 1st of first band auxiliary contact miniature circuit breaker QF1；
Wherein: with the first of the second shunt circuit and the 5th between the first and second capacitor C1 and C2 of the first shunt circuit
It is connected with each other between equalizing resistance R1 and R5；The 12nd termination the L+ terminal, the 4th and of first band auxiliary contact miniature circuit breaker QF1
The 4th equalizing resistance R4, the 11st termination QF1-11 terminal are in series between 2nd end；
The DC2 direct current output circuit are as follows:
The output at the 4th end of third bridge rectifier D3 is respectively connected to the second display instrument after the 6th fuse F6
The 3rd end (end I+) of VA2 and the 10th end (end V+), the 2nd end export respectively to the 14th end of the second display instrument VA2 (end V- and
2 ports of 4th 3P terminal CDN4；
The 24th end (end L) of second display instrument VA2 inputs 2 grades of 3 foot of third green band lamp after the 7th fuse F7 and opens
The 1st end, the 26th end (N-terminal) for closing S3 then connect the 3rd end and the end N+, the 4th end (I- of 3 foot of third green band lamp, 2 gear switch S3 respectively
End) then it is connected to the 2nd end of the 3rd 3P terminal CDN3；
Wherein: the 2nd end (output end) of 3 foot of third green band lamp, 2 gear switch S3 is connected on L+ terminal；
4 articles of circuits are parallel between the outlet line at the 4th and the 2nd end of third bridge rectifier D3: first is in parallel
Circuit is concatenated third, the four, the 5th and the 6th capacitor C3, C4, C5 and C6, and the second shunt circuit is the concatenated 6th, the
Nine, the 13rd and the 18th equalizing resistance R6, R9, R13 and R18, third shunt circuit are the 7th be sequentially connected in series, the 8th,
Ten, the 11st, the 15th, the 17th equalizing resistance R7, R8, R10, R11, R15, R17 and the 4th yellow led diode D4 be just
To the 4th shunt circuit is that the second the 3rd end with auxiliary contact miniature circuit breaker QF2 is brought out into the 1st；
Wherein: between the third and fourth capacitor C3 and C4 of the first shunt circuit with the second shunt circuit the 6th and the 9th
Be connected with each other between equalizing resistance R6 and R9, the 4th and the 5th between capacitor C4 and C5 with the second shunt circuit the 9th and the tenth
Be connected with each other between three equalizing resistance R9 and R13, the 5th and the 6th between capacitor C5 and C6 with the second shunt circuit the 13rd
And the 18th be connected with each other between equalizing resistance R13 and R18；Second the 12nd termination with auxiliary contact miniature circuit breaker QF2
The the 12nd, the 14th and the 16th equalizing resistance R12, R14 and R16, are in series between QF1-11 terminal, the 4th end and the 2nd end
The 2nd end (input terminal) of 11 termination 3 foot of the 4th green band lamp, 2 gear switch S4；The 1st end of 4th green band lamp, 3 foot, 2 gear switch S4
(output end) is connected on A+ terminal, third terminates on KM13+ terminal.
Following table is Switching Power Supply wiring board measurement circuit design parameter.
The effect of fuse is in pressure regulator and its prime protection circuit and indicating circuit: in test device use process
In, unavoidably by load overload, the failure and other reasons of artificial maloperation or device institute band cause test device overload or it is short
Road needs to design corresponding protective device in major loop for the power device of prime in protection tester.For this purpose,
The pressure regulator input side of test device devises fuse in order to cause device to overload in device output short-circuit or fault
When effective can play a protective role to late-class circuit.
The effect of miniature circuit breaker is to realize late-class circuit in pressure regulator and its prime protection circuit and indicating circuit
Overload, short circuit and failure and other reasons when leading to device excess load can effectively disconnecting device input terminal and power grid connection and daily inspection
Device is isolated effectively with power grid when repairing maintenance.
The design of pressure regulator and its prime protection circuit and indicating circuit: pressure regulator prime input voltage 220VAC ±
10%, indicate the most of LED light I_FMAX=25mA in circuit, therefore the loop current in LED indication circuit is designed as when input electricity
I_F=20mA when pressing reach to peak value V_P=342V selects the model 333- of current limliting equalizing resistance model 18K/1206, LED etc.
2SURD/S530-A3-L。
The change-over switch direct current output of 1200VDC/300VDC DC loop input side has two-way, respectively DC1:500VA/
0~300Vdc and DC2:200VA/400~1200Vdc.In order to realize that pressure regulator output can be individually switched to the input terminal of two-way,
Need the change-over switch of 3 grades of 3 foot, input circuit electric current I=2A, here model 8A/~250V of selective switchgear
Three feet three gear ship type switch.
The DC1/DC2 direct current output circuit devise 2 road independent DC power supplies output, be respectively as follows: 500VA/0~
300Vdc and 200VA/400~1200Vdc.
The calculating of capacitance: since under rated power, in the lower situation of voltage, load both end voltage ripple is relatively high
Ripple is big when voltage, therefore the capacity of capacitor is calculated under the conditions of selecting 250Vdc, is computed, and capacitor minimum capacity is Cmin=
192.3 μ F, capacitor pressure voltage: boosting becomes 220Vac~1000Vac, is computed, capacitor pressure voltage 1555.4Vdc.
The beneficial effects of the present invention are:
1, the detection function with two station pressure-adjustables.
2, with electrical self-locking function, it can effectively prevent testing staff because just doing caused danger of making mistakes；
3, it can be improved the detection efficiency of Switching Power Supply wiring board.
Detailed description of the invention
The present invention is further described with embodiment with reference to the accompanying drawing.
Fig. 1 is the Switching Power Supply wiring board detection circuit total figure of the embodiment of the present invention；
Fig. 2 is upper left (pressure regulator and its prime protection circuit and indicating circuit, DC1/DC2 direct current time of Fig. 1 total figure
The conversion switch circuit of road input side)；
Fig. 3 is the upper right portion DC1 direct current output circuit of Fig. 1 total figure；
Fig. 4 is the lower right-most portion DC2 direct current output circuit of Fig. 1 total figure.
Specific embodiment
Referring to Fig. 1 to Fig. 4, for the electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of band of the invention
Embodiment.
Including sequentially connected pressure regulator and its prime protection circuit and indicating circuit, DC1/DC2 DC loop input side
Conversion switch circuit and DC1/DC2 direct current output circuit.
The pressure regulator and its prime protection circuit and indicating circuit are as follows:
The 13rd termination KM13+ terminal, the 5th end with auxiliary contact contactor KM1 connect L terminal, the 1st through second fuse F2
End connects N-terminal through the 4th fuse F4, the 25th termination A1 terminal, the 14th and the 26th terminates that N+ terminal, the 6th end is through third fuse
F3 is followed by the 1st end of pressure regulator TR1, then connects the 2nd end of pressure regulator TR1 with the 2nd end of the 6th end linkage；
Wherein: the 25th end and the 26th end with auxiliary contact contactor KM1 are the both ends of contactor coil, the 5th 3P terminal
1 port of CON5, that is, L terminal, the 2nd port, that is, N-terminal, the 3rd port ground connection；
The conversion switch circuit of the DC1/DC2 DC loop input side are as follows:
The 3rd end of pressure regulator TR1 is connected to the 2nd end and is coupled with the 2nd end (input of the first bridge rectifier D1
End) and the 1st end (input terminal) of 220/1000 pressure regulator T1, the 4th end (pressure regulation output end) be then connected to three feet three keep off ship type open
The 1st end (input terminal) of S2 is closed, the 2nd end (output end) of three feet three gear ship type switch S2 is then connected to the first bridge rectifier D1
The 4th end (another input terminal), the 3rd end (another output end) be then connected to the 2nd end (another input of 220/1000 pressure regulator T1
End) on, the 3rd and the 4th end (two output ends) of 220/1000 pressure regulator T1 is respectively connected to the 1st of third bridge rectifier D3 the
On the 3rd end (two input terminals).
The DC1 direct current output circuit are as follows:
The output at the 1st end of the first bridge rectifier D1 is respectively connected to the first display instrument after first fuse F1
The 3rd end (end I+) of VA1 and the 10th end (end V+), the 3rd end exported respectively to the 14th end (end V-) of the first display instrument VA1 and
2 ports of 2nd 3P terminal CDN2；
The 24th end (end L) of first display instrument VA1 inputs 2 grades of 3 foot of the first green band lamp after the 5th fuse F5 and opens
The 1st end, the 26th end (N-terminal) for closing S1 then connect the 3rd end and the end N+, the 4th end (I- of 3 foot of the first green band lamp, 2 gear switch S1 respectively
End) then it is connected to the 2nd end of the first 3P terminal CDN1；
Wherein: the 2nd end (output end) of 3 foot of the first green band lamp, 2 gear switch S1 is connected on L+ terminal；
Four articles of circuits are parallel between the outlet line at the 1st and the 3rd end of the first bridge rectifier D1: first is in parallel
Circuit be concatenated first and second capacitors C1 and C2, the second shunt circuit be concatenated first and the 5th equalizing resistance R1 and
R5, third shunt circuit be second, third equalizing resistance R2 being sequentially connected in series and R3 and the second green LED diode D2 just
To the 4th shunt circuit brings out for the 3rd into the 1st of first band auxiliary contact miniature circuit breaker QF1；
Wherein: with the first of the second shunt circuit and the 5th between the first and second capacitor C1 and C2 of the first shunt circuit
It is connected with each other between equalizing resistance R1 and R5；The 12nd termination the L+ terminal, the 4th and of first band auxiliary contact miniature circuit breaker QF1
The 4th equalizing resistance R4, the 11st termination QF1-11 terminal are in series between 2nd end；
The DC2 direct current output circuit are as follows:
The output at the 4th end of third bridge rectifier D3 is respectively connected to the second display instrument after the 6th fuse F6
The 3rd end (end I+) of VA2 and the 10th end (end V+), the 2nd end export respectively to the 14th end of the second display instrument VA2 (end V- and
2 ports of 4th 3P terminal CDN4；
The 24th end (end L) of second display instrument VA2 inputs 2 grades of 3 foot of third green band lamp after the 7th fuse F7 and opens
The 1st end, the 26th end (N-terminal) for closing S3 then connect the 3rd end and the end N+, the 4th end (I- of 3 foot of third green band lamp, 2 gear switch S3 respectively
End) then it is connected to the 2nd end of the 3rd 3P terminal CDN3；
Wherein: the 2nd end (output end) of 3 foot of third green band lamp, 2 gear switch S3 is connected on L+ terminal；
4 articles of circuits are parallel between the outlet line at the 4th and the 2nd end of third bridge rectifier D3: first is in parallel
Circuit is concatenated third, the four, the 5th and the 6th capacitor C3, C4, C5 and C6, and the second shunt circuit is the concatenated 6th, the
Nine, the 13rd and the 18th equalizing resistance R6, R9, R13 and R18, third shunt circuit are the 7th be sequentially connected in series, the 8th,
Ten, the 11st, the 15th, the 17th equalizing resistance R7, R8, R10, R11, R15, R17 and the 4th yellow led diode D4 be just
To the 4th shunt circuit is that the second the 3rd end with auxiliary contact miniature circuit breaker QF2 is brought out into the 1st；
Wherein: between the third and fourth capacitor C3 and C4 of the first shunt circuit with the second shunt circuit the 6th and the 9th
Be connected with each other between equalizing resistance R6 and R9, the 4th and the 5th between capacitor C4 and C5 with the second shunt circuit the 9th and the tenth
Be connected with each other between three equalizing resistance R9 and R13, the 5th and the 6th between capacitor C5 and C6 with the second shunt circuit the 13rd
And the 18th be connected with each other between equalizing resistance R13 and R18；Second the 12nd termination with auxiliary contact miniature circuit breaker QF2
The the 12nd, the 14th and the 16th equalizing resistance R12, R14 and R16, are in series between QF1-11 terminal, the 4th end and the 2nd end
The 2nd end (input terminal) of 11 termination 3 foot of the 4th green band lamp, 2 gear switch S4；The 1st end of 4th green band lamp, 3 foot, 2 gear switch S4
(output end) is connected on A+ terminal, third terminates on KM13+ terminal.
Electrical self-lock mechanism: it is switched by contactor (KM1), 3P dc circuit breaker QF1 and 4P dc circuit breaker QF2 and ship type
S4 (master control switch) interlocking, self-lock mechanism are as described below:
1.QF1 auxiliary contact connect input high level, auxiliary contact 12 on No. 11 pin serial connection QF2 of the upper auxiliary contact of QF1
Pin；
2.QF2 No. 11 pins of upper auxiliary contact connect No. 2 pins of S4；
Upper No. 3 pins of 3.S4 connect No. 13 pins of KM1 auxiliary contact, and No. 1 pin of S4 connects KM125 pin；
No. 14 pins and No. 26 pins are shorted in 4.KM1.
Electrical self-locking realization process is as follows:
When 1.QF1, QF2 are disconnected, No. 12 pins of QF1, No. 12 pins of No. 11 pins and QF2, No. 11 pins are all located
In high level state.
2. No. 2 pins and No. 1 pin of S4 are all high level when S4 closure, KM1 input signal AI is high level, KM1
Conducting, No. 13 pins of KM1 auxiliary contact are low level output.S4 indicator light is bright.Indicate device electrification.
3. selecting output loop, Switching Power Supply detection circuit is in running order.
4.. when the test is finished, need to discharge to device.At this point, QF1 or QF2 is closed, whole device starts
Electric discharge.
5. during electric discharge, since the auxiliary contact of QF1 or QF2 disconnect, No. 1 pin of S4 will be unable to obtain high electricity
Flat, contactor will be switched off, and lock.
6. until QF1 and QF2 are held at the state (guaranteeing that circuit is not at the state of electric discharge) of disconnection, whole device
It just unlocks, then S4 is made just to can enter working condition when being closed.
7. in closed state, device is locked in closed state to one in discharge switch QF1 or QF2, test
Personnel also can guarantee safety in maloperation.
Claims (6)
1. the electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of a kind of band, it is characterized in that: including successively connecting
Connect pressure regulator and its prime protection circuit and indicating circuit, DC1/DC2 DC loop input side conversion switch circuit and
DC1/DC2 direct current output circuit；
The pressure regulator and its prime protection circuit and indicating circuit are as follows:
The 13rd termination KM13+ terminal, the 5th end with auxiliary contact contactor (KM1) connect L terminal, the 1st through second fuse (F2)
End through the 4th fuse (F4) connect N-terminal, the 25th termination A1 terminal, the 14th and the 26th terminate N+ terminal, the 6th end fuses through third
Device (F3) is followed by the 1st end of pressure regulator (TR1), then connects the 2nd end of pressure regulator (TR1) with the 2nd end of the 6th end linkage；
Wherein: the 25th end and the 26th end with auxiliary contact contactor (KM1) are the both ends of contactor coil, the 5th 3P terminal
(CON5) 1 port, that is, L terminal, the 2nd port, that is, N-terminal, the 3rd port ground connection.
2. the electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of band according to claim 1, special
Sign is: the conversion switch circuit of the DC1/DC2 DC loop input side are as follows:
3rd end of pressure regulator (TR1) is connected to the 2nd end and is coupled with the 2nd end and 220/ of the first bridge rectifier (D1)
The 1st end, the 4th end of 1000 pressure regulators (T1) are then connected to the 1st end of three feet three gear ship type switch (S2), and three feet three gear ship type is opened
The 4th end, the 3rd end that 2nd end of pass (S2) is then connected to the first bridge rectifier (D1) are then connected to 220/1000 pressure regulator (T1)
The 2nd end on, the 3rd and the 4th end of 220/1000 pressure regulator (T1) is respectively connected to the 1st and of third bridge rectifier (D3)
On 3 ends.
3. the electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of band according to claim 1, special
Sign is: the DC1 direct current output circuit are as follows:
The output at the 1st end of the first bridge rectifier (D1) is respectively connected to the first display instrument after first fuse (F1)
(VA1) the 3rd end (end I+) and the 10th end (end V+), the 3rd end is exported respectively to the 14th end (V- of the first display instrument (VA1)
End) and the 2nd 3P terminal (CDN2) 2 ports；
The 24th end (end L) of first display instrument (VA1) inputs 2 grades of 3 foot of the first green band lamp after the 5th fuse (F5) and opens
The 1st end, the 26th end (N-terminal) for closing (S1) then connect the 3rd end and the end N+, the 4th of 3 foot of the first green band lamp, 2 gear switch (S1) respectively
End (end I-) is then connected to the 2nd end of the first 3P terminal (CDN1)；
Wherein: the 2nd end of 3 foot of the first green band lamp, 2 gear switch (S1) is connected on L+ terminal.
4. the electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of band according to claim 3, special
Sign is: four articles of circuits are parallel between the outlet line at the 1st and the 3rd end of the first bridge rectifier (D1): first is in parallel
Circuit is concatenated first and second capacitor (C1 and C2), and the second shunt circuit is concatenated first and the 5th equalizing resistance (R1
And R5), third shunt circuit is second, third equalizing resistance (R2 and R3) and the second green LED diode being sequentially connected in series
(D2) forward direction, the 4th shunt circuit bring out for the 3rd into the 1st of first band auxiliary contact miniature circuit breaker (QF1)；
Wherein: between the first and second capacitors (C1 and C2) of the first shunt circuit with the first of the second shunt circuit and the 5th
It is connected with each other between piezoresistance (R1 and R5)；12nd termination L+ terminal, the 4th of first band auxiliary contact miniature circuit breaker (QF1)
And the 2nd be in series with the 4th equalizing resistance (R4), the 11st termination QF1-11 terminal between end.
5. the electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of band according to claim 1, special
Sign is: the DC2 direct current output circuit are as follows:
The output at the 4th end of third bridge rectifier (D3) is respectively connected to the second display instrument after the 6th fuse (F6)
(VA2) the 3rd end (end I+) and the 10th end (end V+), the 2nd end is exported respectively to the 14th end (V- of the second display instrument (VA2)
End) and the 4th 3P terminal (CDN4) 2 ports；
The 24th end (end L) of second display instrument (VA2) inputs 2 grades of 3 foot of third green band lamp after the 7th fuse (F7) and opens
The 1st end, the 26th end (N-terminal) for closing (S3) then connect the 3rd end and the end N+, the 4th of 3 foot of third green band lamp, 2 gear switch (S3) respectively
End (end I-) is then connected to the 2nd end of the 3rd 3P terminal (CDN3)；
Wherein: the 2nd end (output end) of 3 foot of third green band lamp, 2 gear switch (S3) is connected on L+ terminal.
6. the electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of band according to claim 5, special
Sign is: 4 articles of circuits are parallel between the outlet line at the 4th and the 2nd end of third bridge rectifier (D3): the first parallel connection is returned
Road is concatenated third, the four, the 5th and the 6th capacitor (C3, C4, C5 and C6), and the second shunt circuit is the concatenated 6th, the
Nine, the 13rd and the 18th equalizing resistance (R6, R9, R13 and R18), third shunt circuit be the seven, the 8th be sequentially connected in series,
Ten, the 11st, the 15th, the 17th equalizing resistance (R7, R8, R10, R11, R15, R17) and the 4th yellow led diode
(D4) forward direction, the 4th shunt circuit are that the second the 3rd end with auxiliary contact miniature circuit breaker (QF2) is brought out into the 1st；
Wherein: between the third and fourth capacitor (C3 and C4) of the first shunt circuit with the 6th and the 9th of the second shunt circuit
Be connected with each other between piezoresistance (R6 and R9), the 4th and the 5th between capacitor (C4 and C5) with the 9th of the second shunt circuit and the
Be connected with each other between 13 equalizing resistances (R9 and R13), the 5th and the 6th between capacitor (C5 and C6) with the second shunt circuit
It is connected with each other between 13rd and the 18th equalizing resistance (R13 and R18)；Second with auxiliary contact miniature circuit breaker (QF2)
12nd termination QF1-11 terminal, be in series between the 4th end and the 2nd end the equalizing resistance of the 12nd, the 14th and the 16th (R12,
R14 and R16), the 11st termination 3 foot of the 4th green band lamp, 2 gear switch (S4) the 2nd end；4th green band lamp, 3 foot, 2 gear switch
(S4) the 1st end is connected on A+ terminal, third terminates on KM13+ terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811471597.2A CN109738831A (en) | 2018-12-04 | 2018-12-04 | A kind of electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811471597.2A CN109738831A (en) | 2018-12-04 | 2018-12-04 | A kind of electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of band |
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