CN209673880U - A kind of observation circuit in direct current output circuit - Google Patents
A kind of observation circuit in direct current output circuit Download PDFInfo
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- CN209673880U CN209673880U CN201920185648.9U CN201920185648U CN209673880U CN 209673880 U CN209673880 U CN 209673880U CN 201920185648 U CN201920185648 U CN 201920185648U CN 209673880 U CN209673880 U CN 209673880U
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Abstract
The utility model provides a kind of observation circuit in direct current output circuit, the case where DC voltage that the utility model monitors branch by anode and cathode monitoring branch monitors the positive output end in direct current output circuit respectively and negative output terminal exports, when the DC voltage that the positive output end in direct current output circuit exports rises above first threshold voltage, and when the DC voltage of the negative output terminal output in direct current output circuit drops to less than four threshold voltages, negative fault alarm branch exports the first alarm signal；When the DC voltage that the positive output end in direct current output circuit exports drops to less than second threshold voltage, and the DC voltage of the negative output terminal output in direct current output circuit rises above four threshold voltages, positive fault alarm branch exports the second alarm signal.Therefore, the utility model can issue warning note when DC Line Fault occurs in the direct current output circuit of reaying protection test power supply panel in time, and staff is reminded to go to check and solve failure.
Description
Technical field
The utility model relates to circuit protection technical field more particularly to a kind of observation circuits in direct current output circuit.
Background technique
When power plant, substation carry out extension project, direct current system is easy to appear direct current event when access device
Barrier generates malfunction so as to cause protective relaying device, when serious, can damage protective relaying device.
Therefore, it before direct current system access device, needs to debug equipment with reaying protection test power supply panel.Its
In, the power supply of reaying protection test power supply panel access two-way 380/220V is powered for it, and two-way power supply mutual backup, it is ensured that
The reliability of reaying protection test power supply panel power supply.
And the output loop of reaying protection test power supply panel has indicator light, voltmeter, ammeter monitoring, but relay protection
The output loop of experimental power supply screen lacks the monitoring problem of DC Line Fault, so in the output loop of reaying protection test power supply panel
It when there is DC Line Fault, is not easy to be found in time, therefore is easy to damage relay protection device.
Utility model content
In view of this, the utility model embodiment provides a kind of observation circuit in direct current output circuit, it is defeated to solve direct current
Circuit lacks the problem of observation circuit of DC Line Fault out.
To achieve the above object, the utility model embodiment provides the following technical solutions:
A kind of observation circuit in direct current output circuit is suitable for reaying protection test power supply panel, comprising: anode monitoring branch
Road, cathode monitoring branch, negative fault alarm branch and positive fault alarm branch；Wherein:
The input terminal of the anode monitoring branch receives the DC voltage of the positive output end output in the direct current output circuit；
It is described anode monitoring branch output end respectively with the first control terminal of the negative fault alarm branch and the positive fault alarm
First control terminal of branch is connected；
The input terminal of the cathode monitoring branch receives the DC voltage of the negative output terminal output in the direct current output circuit；
The output end of cathode monitoring branch respectively with the second control terminal of the negative fault alarm branch and the positive fault alarm
Second control terminal of branch is connected；
The output end of the negative fault alarm branch exports the first alarm signal, and first alarm signal is described straight
The DC voltage of the positive output end output of stream output loop rises above first threshold voltage and the direct current output circuit
The DC voltage of negative output terminal output, which drops to less than, to be generated when four threshold voltages；
The output end of the positive fault alarm branch exports the second alarm signal, and second alarm signal is described straight
The DC voltage of the positive output end output of stream output loop drops to less than second threshold voltage and the direct current output circuit
The DC voltage of negative output terminal output, which rises above, to be generated when third threshold voltage.
Optionally, the anode monitoring branch, comprising: the coil of first switch, first resistor and the first DC relay；
Wherein:
The coils from parallel connection of coils of the first resistor and first DC relay, one end in parallel and the first switch
One end is connected；Other end ground connection in parallel；
Input terminal of the other end of the first switch as the anode monitoring branch；
Output end of the control signal output of the coil of first DC relay as the anode monitoring branch.
Optionally, the cathode monitors branch, comprising: the coil of second switch, second resistance and the second DC relay；
Wherein:
The coils from parallel connection of coils of the second resistance and second DC relay, one end in parallel and the second switch
One end is connected；Other end ground connection in parallel；
Input terminal of the other end of the second switch as cathode monitoring branch；
Output end of the control signal output of the coil of second DC relay as cathode monitoring branch.
Optionally, the negative fault alarm branch, comprising: the normally opened contact of the first DC relay, the second direct current relay
The normally-closed contact and first light source alarm unit of device；Wherein:
Normally opened contact one end of first DC relay is connected with the anode of power supply, first DC relay
The normally opened contact other end passes sequentially through normally-closed contact and the first light source alarm unit and the institute of second DC relay
The cathode for stating power supply is connected；Alternatively, normally opened contact one end of first DC relay is connected with the anode of the power supply, institute
State the first DC relay the normally opened contact other end pass sequentially through the first light source alarm unit and second direct current after
The normally-closed contact of electric appliance is connected with the cathode of the power supply；
First control of the control terminal of the normally opened contact of first DC relay as the negative fault alarm branch
End；Second control terminal of the control terminal of the normally-closed contact of second DC relay as the negative fault alarm branch.
Optionally, the negative fault alarm branch, further includes: first sound source in parallel with the first light source alarm unit
Alarm unit.
Optionally, the positive fault alarm branch, comprising: the normally-closed contact of the first DC relay, the second direct current relay
The normally opened contact and second light source alarm unit of device；Wherein:
Normally opened contact one end of second DC relay is connected with the anode of power supply, second DC relay
The normally opened contact other end passes sequentially through normally-closed contact and the second light source alarm unit and the institute of first DC relay
The cathode for stating power supply is connected；Alternatively, normally opened contact one end of second DC relay is connected with the anode of the power supply, institute
State the second DC relay the normally opened contact other end pass sequentially through the second light source alarm unit and first direct current after
The normally-closed contact of electric appliance is connected with the cathode of the power supply；
First control of the control terminal of the normally-closed contact of first DC relay as the positive fault alarm branch
End；Second control terminal of the control terminal of the normally opened contact of second DC relay as the negative fault alarm branch.
Optionally, the positive fault alarm branch, further includes: second sound source in parallel with the second light source alarm unit
Alarm unit.
Optionally, the positive output end in the direct current output circuit is the anode of the power supply, the direct current output circuit
Negative output terminal is the cathode of the power supply.
Optionally, further includes: N number of direct current output branch；Wherein:
The positive input terminal of the direct current output branch is connected with the positive output end in the direct current output circuit, and the direct current is defeated
The negative input end of out branch is connected with the negative output terminal in the direct current output circuit；
The positive output end of the direct current output branch is connected with one end of load, the negative output terminal of the direct current output branch
It is connected with the other end of load；
Wherein, N is nonnegative integer.
Optionally, the direct current output branch, comprising: be set to the positive input terminal and positive output of the direct current output branch
Air switch between end；
The direct current output branch, comprising: be set between the negative input end and negative output terminal of the direct current output branch
Air switch.
In terms of existing technologies, the utility model monitors branch by anode and cathode monitors branch and monitors respectively directly
The case where DC voltage that the positive output end and negative output terminal for flowing output loop export, when the positive output end in direct current output circuit is defeated
DC voltage out rises above first threshold voltage, and under the DC voltage of the negative output terminal output in direct current output circuit
When dropping to less than four threshold voltages, negative fault alarm branch conducting exports the first alarm signal；When direct current output circuit just
The DC voltage of output end output drops to less than second threshold voltage, and the negative output terminal output in direct current output circuit is straight
When galvanic electricity pressure rises above third threshold voltage, positive fault alarm branch conducting exports the second alarm signal.Therefore, this reality
With novel when DC Line Fault occurs in the direct current output circuit of reaying protection test power supply panel, warning note can be issued in time, is mentioned
Awake staff goes to check and solve failure, makes reaying protection test power supply panel can be by safer during equipment debugging
Use, also reduce protective relaying device and be risk of damage to.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is a kind of schematic diagram of the observation circuit in direct current output circuit provided by the embodiment of the utility model；
Fig. 2 is the anode monitoring in a kind of observation circuit in direct current output circuit that another embodiment of the utility model provides
The schematic diagram of branch 110；
Fig. 3 is the cathode monitoring in a kind of observation circuit in direct current output circuit that another embodiment of the utility model provides
The schematic diagram of branch 120；
Fig. 4 is the negative failure report in a kind of observation circuit in direct current output circuit that another embodiment of the utility model provides
The schematic diagram of alert branch 130；
Fig. 5 is the positive failure report in a kind of observation circuit in direct current output circuit that another embodiment of the utility model provides
The schematic diagram of alert branch 140；
Fig. 6 is a kind of schematic diagram of the observation circuit in direct current output circuit that another embodiment of the utility model provides.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
In this application, the terms "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion,
So that the process, method, article or equipment for including a series of elements not only includes those elements, but also including not having
The other element being expressly recited, or further include for elements inherent to such a process, method, article, or device.Do not having
There is the element limited in the case where more limiting by sentence "including a ...", it is not excluded that in the mistake including the element
There is also other identical elements in journey, method, article or equipment.
In order to solve the problems, such as that direct current output circuit lacks DC Line Fault observation circuit, the utility model embodiment provides one
The observation circuit in kind direct current output circuit, is suitable for reaying protection test power supply panel, such as Fig. 1, specific structure includes: positive monitoring
Branch 110, cathode monitoring branch 120, negative fault alarm branch 130 and positive fault alarm branch 140；Wherein:
The input anode of anode monitoring branch 110 is connected with the positive output end in the direct current output circuit, anode monitoring
The input cathode of branch 110 is grounded；Cathode monitors the input cathode of branch 120 and the negative output in the direct current output circuit
End is connected, and cathode monitors the input anode ground connection of branch 120.
The input anode of negative fault alarm branch 130 is connected with the anode of power supply, negative fault alarm branch 130 it is defeated
Enter to hold cathode to be connected with the cathode of power supply；The input anode of positive fault alarm branch 140 is connected with the anode of the power supply, just
The input cathode of fault alarm branch 140 is connected with the cathode of power supply.
It should be noted that the power supply that negative fault alarm branch 130 and positive fault alarm branch 140 are connected, can be
Independently of the additional power supply in the direct current output circuit；The observation circuit in the direct current output circuit provided in this embodiment at this time,
It not only needs that the port being attached with the positive-negative output end in the direct current output circuit is arranged, it is also necessary to which be negative fault alarm branch
Corresponding power connector end mouth is additionally arranged in road 130 and positive fault alarm branch 140.Alternatively, can also be directly by the direct current
The power supply that output loop is connected as negative fault alarm branch 130 and positive fault alarm branch 140, and then be the two power supply；
At this point, the observation circuit in the direct current output circuit provided in this embodiment, it is only necessary to which setting and the direct current output circuit are just
The port that negative output terminal is attached.It can be depending on its specific application environment, at this for the actual setting of power supply
In the protection scope of application.
First control terminal of the first control terminal of negative fault alarm branch 130 and positive fault alarm branch 140, with anode
The output end for monitoring branch 110 is connected；The of second control terminal of negative fault alarm branch 130 and positive fault alarm branch 140
Two control terminals are connected with the output end of cathode monitoring branch 120.
Concrete operating principle are as follows:
Anode monitoring branch 110 and cathode monitoring branch 120 respectively export the positive output end in direct current output circuit straight
Galvanic electricity pressure and the DC voltage of negative output terminal output carry out real-time monitoring, when anode monitoring branch 110 monitors that direct current output is returned
When the DC voltage of the positive output end output on road rises above first threshold voltage, output end exports first control signal
V1；When the first observation circuit 110 monitors that the DC voltage of the positive output end output in direct current output circuit drops to less than second
When threshold voltage, output end exports second control signal V2.
Wherein, first threshold voltage is the 80% of the voltage rating of the positive output end in direct current output circuit；Second threshold electricity
Pressure is the 10% of the voltage rating of the positive output end in direct current output circuit.
When cathode monitoring branch 120 monitors that the DC voltage of direct current output circuit negative output terminal output rises above the
When three threshold voltages, output end exports third and controls signal V3；When cathode monitoring branch 120 monitors direct current output circuit
The DC voltage of negative output terminal when dropping to less than four threshold voltages, the 4th control signal V4 of output end output.
Wherein, third threshold voltage is the 80% of the voltage rating of the negative output terminal in direct current output circuit；4th threshold value electricity
Pressure is the 10% of the voltage rating of the negative output terminal in direct current output circuit.
When the first control terminal of negative fault alarm branch 130 receives first control signal V1, the second control terminal is received
To the 4th control signal V4, then negative fault alarm branch 130 exports the first alarm signal.
When the first control terminal of positive fault alarm branch 140 receives second control signal V2, the second control terminal is received
Signal V3 is controlled to third, then positive fault alarm branch 140 exports the second alarm signal.
In terms of existing technologies, the utility model monitors branch by anode and cathode monitors branch and monitors respectively directly
The case where DC voltage that the positive output end and negative output terminal for flowing output loop export, when the positive output end in direct current output circuit is defeated
DC voltage out rises above first threshold voltage, and under the DC voltage of the negative output terminal output in direct current output circuit
When dropping to less than four threshold voltages, negative fault alarm branch conducting exports the first alarm signal；When direct current output circuit just
The DC voltage of output end output drops to less than second threshold voltage, and the negative output terminal output in direct current output circuit is straight
When galvanic electricity pressure rises above third threshold voltage, positive fault alarm branch conducting exports the second alarm signal.Therefore, this reality
With novel when DC Line Fault occurs in the direct current output circuit of reaying protection test power supply panel, warning note can be issued in time, is mentioned
Awake staff goes to check and solve failure, makes reaying protection test power supply panel can be by safer during equipment debugging
Use, also reduce protective relaying device and be risk of damage to.
Optionally, such as Fig. 2, in another embodiment of the utility model, a kind of embodiment party of anode monitoring branch 110
Formula, specific structure include: the coil 111 of first switch S1, first resistor R1 and the first DC relay；Wherein:
First resistor R1 is in parallel with the coil 111 of the first DC relay, one end of one end in parallel and first switch S1
It is connected；The input cathode of the other end in parallel as anode monitoring branch 110.
Input anode of the other end of first switch S1 as anode monitoring branch 110；The line of first DC relay
Control terminal of the control signal output of circle 111 as anode monitoring branch 110.
Optionally, first resistor R1 is the resistance that resistance value is 20 kilo-ohms.
Specific working principle are as follows:
It is closed first switch S1, anode monitoring branch 110 is connected, and electric current flows through first resistor R1, on first resistor R1
Partial pressure is generated, since the coil 111 of the first DC relay is in parallel with first resistor R1, so the coil of the first DC relay
The voltage at 111 pairs of both ends first resistor R1 is monitored；Again because one end of first resistor R1 passes through first switch S1 and direct current
The positive output end of output loop is connected, and the other end of first resistor R1 is grounded, so the coil 111 of the first DC relay is right
The voltage at the both ends first resistor R1 is monitored, and the DC voltage for being equal to the positive output end output to direct current output circuit carries out
Monitoring.
When on the DC voltage of positive output end output that the coil 111 of the first DC relay monitors direct current output circuit
When being raised to greater than first threshold voltage, control signal output output the first control letter of the coil 111 of the first DC relay
Number V1；When the coil 111 of the first DC relay monitors the DC voltage decline of the positive output end output in direct current output circuit
To when being less than second threshold voltage, the control signal output of the coil 111 of the first DC relay exports second control signal
V2。
In addition, staff can be opened by disconnecting first after negative fault alarm branch 130 exports the first alarm signal
S1 is closed, the coil 111 of the first DC relay is resetted, so that negative fault alarm branch 130 be made to form open circuit, stops its output
First alarm signal；Also, after staff's maintenance, it can check that direct current output is returned by closure first switch S1
Whether there is also DC Line Faults on road, if negative fault alarm branch 130 exports the first alarm signal after closure first switch S1,
Then there are still DC Line Faults in direct current output circuit, if negative fault alarm branch 130 is not alarmed after closure first switch S1,
Then DC Line Fault is not present in direct current output circuit.
It should be noted that the coil 111 of the first DC relay can generate when first switch S1 is opened or closed
Self inductance, while having self induction electromotive force generation, and the coil 111 of the first DC relay with self induction electromotive force is equivalent to
Power supply can have an impact other electronic devices.And the first resistor R1 in parallel with the coil of the first DC relay 111 can be with
When first switch S1 is opened or closed, the self induction electromotive force that the coil 111 of the first DC relay of consumption generates reaches protection
The purpose of other electronic devices.
It should be noted that the present embodiment provides only a kind of embodiment of anode monitoring branch 110, practical application
In, anode monitoring branch 110 can also be realized using comparator, or be also possible to the unit being made of other electrical components
Or independent module, as long as can be realized the other embodiments of the anode monitoring branch 110 of same purpose in this reality
With in novel protection scope.
Remaining structure and working principle are same as the previously described embodiments, and details are not described herein again.
Optionally, such as Fig. 3, in another embodiment of the utility model, cathode monitors a kind of embodiment party of branch 120
Formula, specific structure include: the coil 121 of second switch S2, second resistance R2 and the second DC relay；Wherein:
Second resistance R2 is in parallel with the coil 121 of the second DC relay, one end of one end in parallel and second switch S2
It is connected；The input anode of the other end in parallel as cathode monitoring branch 120.
Input cathode of the other end of second switch S2 as cathode monitoring branch 120；The line of second DC relay
Output end of the control signal output of circle 121 as cathode monitoring branch 120.
It should be noted that second resistance R2 is the resistance that resistance value is 20 kilo-ohms.
Specific working principle:
It is closed second switch S2, cathode detection branch 110 is connected, and electric current flows through second resistance R2, on second resistance R2
Partial pressure is generated, since the coil 121 of the second DC relay is in parallel with second resistance R2, so the coil of the second DC relay
The voltage at 121 pairs of both ends second resistance R2 is monitored；Again because one end of second resistance R2 passes through second switch S2 and direct current
The negative output terminal of output loop is connected, and the other end of second resistance R2 is grounded, so the coil 121 of the second DC relay is right
The voltage at the both ends first resistor R1 is monitored, and the DC voltage for being equal to the negative output terminal output to direct current output circuit carries out
Monitoring.
When on the DC voltage of negative output terminal output that the coil 121 of the second DC relay monitors direct current output circuit
When being raised to greater than third threshold voltage, the control signal output output third control letter of the coil 121 of the second DC relay
Number V3；When the coil 121 of the second DC relay monitors the DC voltage decline of the negative output terminal output in direct current output circuit
When to less than four threshold voltages, the 4th control signal of control signal output output of the coil 121 of the second DC relay
V4。
In addition, staff can be opened by disconnecting second after positive fault alarm branch 140 exports the second alarm signal
S2 is closed, the coil 121 of the second DC relay is resetted, so that positive fault alarm branch 140 be made to form open circuit, stops its output
Second alarm signal；Also, after staff's maintenance, it can check that direct current output is returned by closure second switch S2
Whether there is also DC Line Faults on road, if positive fault alarm branch 140 exports the second alarm signal after closure second switch S2,
Then there are still DC Line Faults in direct current output circuit, if positive fault alarm branch 140 is not alarmed after closure second switch S2,
Then DC Line Fault is not present in direct current output circuit.
It should be noted that the coil 121 of the second DC relay can generate when second switch S2 is opened or closed
Self inductance, while having self induction electromotive force generation, and the coil 121 of the second DC relay with self induction electromotive force is equivalent to
Power supply can have an impact other electronic devices.And the second resistance R2 in parallel with the coil of the second DC relay 121 can be with
When second switch S2 is opened or closed, the self induction electromotive force that the coil 121 of the second DC relay of consumption generates reaches protection
The purpose of other electronic devices.
It should be noted that the present embodiment provides only a kind of embodiment of cathode monitoring branch 120, cathode monitoring branch
The another embodiment on road 120 can be comparator, be also possible to the unit being made of other electrical components or independent mould
Block, as long as can be realized the other embodiments of the cathode monitoring branch 120 of same purpose in the guarantor of the utility model
It protects in range.
Remaining structure and working principle are same as the previously described embodiments, and details are not described herein again.
Optionally, such as Fig. 4, in another embodiment of the utility model, a kind of embodiment party of negative fault alarm branch 130
Formula, specific structure include: the normally-closed contact 132 and first of the normally opened contact 131 of the first DC relay, the second DC relay
Light source alarm unit 133；Wherein:
Input anode of 131 one end of normally opened contact of first DC relay as negative fault alarm branch 130, first
131 other end of normally opened contact of DC relay is single by normally-closed contact 132 and the first light source alarm of the second DC relay
One end of member 133 is connected, input cathode of the other end of first light source alarm unit 133 as negative fault alarm branch；Or
Person, input anode of 131 one end of normally opened contact of the first DC relay as negative fault alarm branch 130, the first direct current
131 other end of normally opened contact of relay passes through the normally-closed contact of first light source alarm unit 133 and the second DC relay
132 one end is connected, input of the other end of the normally-closed contact 132 of the second DC relay as negative fault alarm branch 130
Hold cathode.
It should be noted that above-mentioned connection type is preferred embodiment, the normally opened touching of the first DC relay in practical application
The normally-closed contact 132 of the 131, second DC relay of point and 133 three of first light source alarm unit need to only be cascaded can
To realize the function of negative fault alarm branch 130, so regardless of three is cascaded in what order, in the utility model
Protection scope in.
First control terminal of the control terminal of the normally opened contact 131 of first DC relay as negative fault alarm branch 130；
Second control terminal of the control terminal of the normally-closed contact 132 of second DC relay as negative fault alarm branch 130.
Specific working principle are as follows:
When the control terminal of the normally opened contact 131 of the first DC relay receives the control signal of anode monitoring branch 110
When the first control signal V1 of output end output, by closed in itself；When the control terminal of the normally-closed contact 132 of the second DC relay
When receiving the 4th control signal V4 of the control signal output output of cathode monitoring branch 120, by closed in itself.
When the normally opened contact 131 of the first DC relay and the normally-closed contact 132 of the second DC relay, when being all closed,
First light source alarm unit 133 issues first light source alarm signal.
It should be noted that the way of realization of first light source alarm unit 133 can be alarm, it is also possible to other solely
Vertical electronic device or the unit being made of discrete device, as long as can be realized other ways of realization of same purpose,
It is within the protection scope of the present utility model.
Optionally, negative fault alarm branch 130 further includes the first sound source alarm unit 134；First sound source alarm unit 134
It is in parallel with first light source alarm unit 133；When the first DC relay normally opened contact 131 and the second DC relay it is normal
Closed contact 132, when being all closed, the conducting of the first sound source alarm unit 134 issues the first sound source alarm signal, solves light source report
Alert signal is not easy the problem of being found, and can effectively remind work at the first time when DC Line Fault occurs in direct current output circuit
Personnel avoid the damage of equipment.
It should be noted that the way of realization of the first sound source alarm unit 134 can be loudspeaker, intelligent sound box can be,
The module for being also possible to other independent electronic devices or being made of discrete device, as long as can be realized same purpose
Other ways of realization, it is within the protection scope of the present utility model.
It should be noted that the present embodiment provides only a kind of embodiment of negative fault alarm branch 130, negative failure report
The another embodiment of alert branch 130 can be switching tube, be also possible to the unit being made of other electrical components or independence
Module, as long as it is practical new at this to can be realized the other embodiments of the negative fault alarm branch 130 of same purpose
In the protection scope of type.
Remaining structure and working principle are same as the previously described embodiments, and details are not described herein again.
Optionally, such as Fig. 5, in another embodiment of the utility model, a kind of embodiment party of positive fault alarm branch 140
Formula, specific structure include: the normally opened contact 142 and second of the normally-closed contact 141 of the first DC relay, the second DC relay
Light source alarm unit 143；Wherein:
Input anode of 142 one end of normally opened contact of second DC relay as positive fault alarm branch 140, second
142 other end of normally opened contact of DC relay is single by normally-closed contact 141 and the second light source alarm of the first DC relay
One end of member 143 is connected, input cathode of the other end of second light source alarm unit 143 as positive fault alarm branch 140；
Alternatively, input anode of 142 one end of normally opened contact of the second DC relay as positive fault alarm branch 140, second is straight
142 other end of normally opened contact of current relay passes through the normally-closed contact of second light source alarm unit 143 and the first DC relay
141 one end is connected, and the other end of the normally-closed contact 141 of the first direct current current-collector is as the defeated of positive fault alarm branch 140
Enter to hold cathode.
It should be noted that above-mentioned connection type is preferred embodiment, the normally closed touching of the first DC relay in practical application
The normally opened contact 142 of the 141, second DC relay of point and 143 three of second light source alarm unit need to only be cascaded can
To realize the function of negative fault alarm branch 130, so regardless of three is cascaded in what order, in the utility model
Protection scope in.
First control terminal of the control terminal of the normally-closed contact 141 of first DC relay as positive fault alarm branch 140；
Second control terminal of the control terminal of the normally opened contact 142 of second DC relay as positive fault alarm branch 140.
Concrete operating principle are as follows:
When the control terminal of the normally-closed contact 141 of the first DC relay receives the control signal of anode monitoring branch 110
When the second control signal of output end output, by closed in itself；When the control termination of the normally opened contact 142 of the second DC relay
When receiving the third control signal of the control signal output output of cathode monitoring branch 120, by closed in itself.
When the normally-closed contact 141 of the first DC relay and the normally opened contact 142 of the second DC relay, when being all closed,
Second light source alarm unit 143 issues second light source alarm signal.
It should be noted that the way of realization of second light source alarm unit 143 can be alarm, it is also possible to other solely
Vertical electronic device or the unit being made of discrete device, as long as can be realized other ways of realization of same purpose,
It is within the protection scope of the present utility model.
Optionally, positive fault alarm branch 140 further includes the second sound source alarm unit 144；Second sound source alarm unit 144
It is in parallel with second light source alarm unit 143；When the first DC relay normally-closed contact 141 and the second DC relay it is normal
Contact 142 is opened, when being all closed, the conducting of the second sound source alarm unit 144 issues the second sound source alarm signal, solves light source report
Alert signal is not easy the problem of being found, and can effectively remind work at the first time when DC Line Fault occurs in direct current output circuit
Personnel avoid the damage of equipment.
It should be noted that the way of realization of the second sound source alarm unit 144 can be loudspeaker, intelligent sound box can be,
The module for being also possible to other independent electronic devices or being made of discrete device, as long as can be realized same purpose
Other ways of realization, it is within the protection scope of the present utility model.
It should be noted that the present embodiment provides only a kind of embodiment of positive fault alarm branch 140, positive failure report
The another embodiment of alert branch 140 can be switching tube, be also possible to the unit being made of other electrical components or independence
Module, as long as it is practical new at this to can be realized the other embodiments of the positive fault alarm branch 140 of same purpose
In the protection scope of type.
Remaining structure and working principle are same as the previously described embodiments, and details are not described herein again.
Optionally, if Fig. 6 (in figure only by taking two direct current output branches as an example) is in another embodiment of the utility model,
On the basis of the above embodiments, the observation circuit in direct current output circuit, further includes: N number of direct current output branch；Wherein:
The positive input terminal of direct current output branch is connected with the positive output end in direct current output circuit, and bearing for direct current output branch is defeated
Enter end to be connected with the negative output terminal in direct current output circuit.
The positive output end of direct current output branch is connected with one end of required equipment, the negative output terminal of direct current output branch and institute
The other end of equipment is needed to be connected；Wherein, N is nonnegative integer.
Optionally, direct current output branch includes the sky being set between the positive input terminal and positive output end of direct current output branch
Air cock, alternatively, including the air switch being set between the negative input end and negative output terminal of direct current output branch.
It should be noted that the number of N is chosen according to the actual needs.
In use, load is connected between two output ends of direct current output branch, it is closed air switch, then in load
There is electric current to pass through；If direct current output branch breaks down, air switch can be automatically powered off, and to protect load, prevent load from damaging
It is bad.
Remaining structure and working principle are same as the previously described embodiments, and details are not described herein again.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (10)
1. a kind of observation circuit in direct current output circuit is suitable for reaying protection test power supply panel characterized by comprising just
Pole monitors branch, cathode monitoring branch, negative fault alarm branch and positive fault alarm branch；Wherein:
The input terminal of the anode monitoring branch receives the DC voltage of the positive output end output in the direct current output circuit；It is described
Anode monitoring branch output end respectively with the first control terminal of the negative fault alarm branch and the positive fault alarm branch
The first control terminal be connected；
The input terminal of the cathode monitoring branch receives the DC voltage of the negative output terminal output in the direct current output circuit；It is described
Cathode monitor branch output end respectively with the second control terminal of the negative fault alarm branch and the positive fault alarm branch
The second control terminal be connected；
The output end of the negative fault alarm branch exports the first alarm signal, and first alarm signal is defeated in the direct current
It is defeated to rise above bearing for first threshold voltage and the direct current output circuit for the DC voltage of the positive output end output in circuit out
The DC voltage of outlet output, which drops to less than, to be generated when four threshold voltages；
The output end of the positive fault alarm branch exports the second alarm signal, and second alarm signal is defeated in the direct current
It is defeated to drop to less than bearing for second threshold voltage and the direct current output circuit for the DC voltage of the positive output end output in circuit out
The DC voltage of outlet output, which rises above, to be generated when third threshold voltage.
2. the observation circuit in direct current output circuit according to claim 1, which is characterized in that the anode monitoring branch,
It include: the coil of first switch, first resistor and the first DC relay；Wherein:
The coils from parallel connection of coils of the first resistor and first DC relay, one end of one end in parallel and the first switch
It is connected；Other end ground connection in parallel；
Input terminal of the other end of the first switch as the anode monitoring branch；
Output end of the control signal output of the coil of first DC relay as the anode monitoring branch.
3. the observation circuit in direct current output circuit according to claim 1, which is characterized in that the cathode monitors branch,
It include: the coil of second switch, second resistance and the second DC relay；Wherein:
The coils from parallel connection of coils of the second resistance and second DC relay, one end of one end in parallel and the second switch
It is connected；Other end ground connection in parallel；
Input terminal of the other end of the second switch as cathode monitoring branch；
Output end of the control signal output of the coil of second DC relay as cathode monitoring branch.
4. the observation circuit in direct current output circuit according to claim 1, which is characterized in that the negative fault alarm branch
Road, comprising: the normally opened contact of the first DC relay, the normally-closed contact of the second DC relay and first light source alarm unit；
Wherein:
Normally opened contact one end of first DC relay is connected with the anode of power supply, first DC relay it is normally opened
The contact other end passes sequentially through the normally-closed contact and the first light source alarm unit and the electricity of second DC relay
The cathode in source is connected；Alternatively, normally opened contact one end of first DC relay is connected with the anode of the power supply, described
The normally opened contact other end of one DC relay passes sequentially through the first light source alarm unit and second DC relay
Normally-closed contact be connected with the cathode of the power supply；
First control terminal of the control terminal of the normally opened contact of first DC relay as the negative fault alarm branch；Institute
State second control terminal of the control terminal of the normally-closed contact of the second DC relay as the negative fault alarm branch.
5. the observation circuit in direct current output circuit according to claim 4, which is characterized in that the negative fault alarm branch
Road, further includes: the first sound source alarm unit in parallel with the first light source alarm unit.
6. the observation circuit in direct current output circuit according to claim 1, which is characterized in that the positive fault alarm branch
Road, comprising: the normally-closed contact of the first DC relay, the normally opened contact of the second DC relay and second light source alarm unit；
Wherein:
Normally opened contact one end of second DC relay is connected with the anode of power supply, second DC relay it is normally opened
The contact other end passes sequentially through the normally-closed contact and the second light source alarm unit and the electricity of first DC relay
The cathode in source is connected；Alternatively, normally opened contact one end of second DC relay is connected with the anode of the power supply, described
The normally opened contact other end of two DC relays passes sequentially through the second light source alarm unit and first DC relay
Normally-closed contact be connected with the cathode of the power supply；
First control terminal of the control terminal of the normally-closed contact of first DC relay as the positive fault alarm branch；Institute
State second control terminal of the control terminal of the normally opened contact of the second DC relay as the negative fault alarm branch.
7. the observation circuit in direct current output circuit according to claim 6, which is characterized in that the positive fault alarm branch
Road, further includes: the second sound source alarm unit in parallel with the second light source alarm unit.
8. according to the observation circuit in the described in any item direct current output circuits claim 4-7, which is characterized in that the direct current is defeated
The positive output end in circuit is the anode of the power supply out, and the negative output terminal in the direct current output circuit is the cathode of the power supply.
9. the observation circuit in direct current output circuit according to claim 1-7, which is characterized in that further include: it is N number of
Direct current output branch；Wherein:
The positive input terminal of the direct current output branch is connected with the positive output end in the direct current output circuit, the direct current output branch
The negative input end on road is connected with the negative output terminal in the direct current output circuit；
The positive output end of the direct current output branch is connected with one end of load, the negative output terminal of the direct current output branch and negative
The other end of load is connected；
Wherein, N is nonnegative integer.
10. the observation circuit in direct current output circuit according to claim 9, which is characterized in that the direct current output branch,
It include: the air switch being set between the positive input terminal and positive output end of the direct current output branch；
The direct current output branch, comprising: the sky being set between the negative input end and negative output terminal of the direct current output branch
Air cock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920185648.9U CN209673880U (en) | 2019-02-02 | 2019-02-02 | A kind of observation circuit in direct current output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920185648.9U CN209673880U (en) | 2019-02-02 | 2019-02-02 | A kind of observation circuit in direct current output circuit |
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| Publication Number | Publication Date |
|---|---|
| CN209673880U true CN209673880U (en) | 2019-11-22 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920185648.9U Withdrawn - After Issue CN209673880U (en) | 2019-02-02 | 2019-02-02 | A kind of observation circuit in direct current output circuit |
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| Country | Link |
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| CN (1) | CN209673880U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633248A (en) * | 2019-02-02 | 2019-04-16 | 华润新能源(大同阳高)风能有限公司 | A kind of observation circuit in direct current output circuit |
-
2019
- 2019-02-02 CN CN201920185648.9U patent/CN209673880U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633248A (en) * | 2019-02-02 | 2019-04-16 | 华润新能源(大同阳高)风能有限公司 | A kind of observation circuit in direct current output circuit |
| CN109633248B (en) * | 2019-02-02 | 2024-03-19 | 华润新能源(大同阳高)风能有限公司 | Monitoring circuit of direct current output loop |
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