CN107831401A - Power of alterating and direct current system busbar and feeder line branch road power-off monitoring device and its method - Google Patents
Power of alterating and direct current system busbar and feeder line branch road power-off monitoring device and its method Download PDFInfo
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- CN107831401A CN107831401A CN201711068075.3A CN201711068075A CN107831401A CN 107831401 A CN107831401 A CN 107831401A CN 201711068075 A CN201711068075 A CN 201711068075A CN 107831401 A CN107831401 A CN 107831401A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
Abstract
The present invention discloses a kind of power of alterating and direct current system busbar and feeder line branch road power-off monitoring device and its method, belong to power transformation monitoring technical field, including classified Monitoring device, described classified Monitoring device includes plant-grid connection terminal, divider resistance, voltage-stabiliser tube and warning circuit, power access end attached bag includes " +/L " poles and "/N " poles, " "/N " the poles that +/L " poles pass through rectifier circuit connection plant-grid connection terminal of plant-grid connection terminal, the positive pole of rectifier circuit output connect the negative pole of rectifier circuit output by the divider resistance that is sequentially connected in series with voltage-stabiliser tube, the both ends connection warning circuit of voltage-stabiliser tube, the disconnection fault of power of alterating and direct current system busbar and feeder line branch road can be monitored in real time, and alarmed in time, solves produced problem in the prior art.
Description
Technical field
The present invention relates to a kind of power of alterating and direct current system busbar and feeder line branch road power-off monitoring device and its method, belong to change
Pyroelectric monitor technical field.
Background technology
Transformer station's dead electricity accident happens occasionally, and most cause of accident is all caused by DC power system failure, is led to
Cross the analysis to such accident to find, be dc source bus and feeder line branch road because before the failure occurs in many cases
Dead electricity, but due to lacking comprehensive monitoring measure to the voltage and current information of dc source bus and feeder line branch road,
Fail to find in straight-flow system existing disconnection fault hidden danger in time.If a certain direct current branch protection power source and control electricity
Source dead electricity, operator on duty do not have found the failure in time, and when there is short trouble generation, breaker is because no power supply is without entering
Row trip protection acts, and now may result in tripping operation of bypassing the immediate leadership, causes greater area of dead electricity, causes fault spread, increase is not
Necessary loss.
In view of the above-mentioned problems, strengthening being necessary to the monitoring of the dead electricity of dc source bus and DC feeder, lead to
The dead electricity monitoring to dc source is crossed, operator on duty can be made to find direct current Loss of power failure in time, Loss of power failure is carried out in time
Investigation is safeguarded, avoids causing bigger transformer station's dead electricity accident because of direct current dead electricity, in order to avoid result in greater loss.
The content of the invention
It is an object of the invention to provide a kind of power of alterating and direct current system busbar and feeder line branch road power-off monitoring device and its
Method, the disconnection fault of power of alterating and direct current system busbar and feeder line branch road can be monitored in real time, and be alarmed in time, solve
Produced problem in the prior art.
Power of alterating and direct current system busbar and feeder line branch road of the present invention power off monitoring device, including classified Monitoring dress
Put, classified Monitoring device includes plant-grid connection terminal, divider resistance, voltage-stabiliser tube and warning circuit, power access end attached bag include "+/
L " poles and " -/N " poles, plant-grid connection terminal " +/L " poles by rectifier circuit connect plant-grid connection terminal " -/N " poles, it is whole
The positive pole of stream bridge circuit output connect the negative pole of rectifier circuit output, voltage stabilizing by the divider resistance that is sequentially connected in series with voltage-stabiliser tube
The both ends connection warning circuit of pipe.
By introducing rectifier circuit, you can monitoring AC system off-position, and can monitoring straight-flow system off-position；
Working power is provided for the device in rear class warning circuit into bleeder circuit with regulator tube group by divider resistance, if bus or branch
When the voltage on road is normal, the device in warning circuit, which obtains enough operating voltages, makes its signal output be closure state, if female
Line voltage is reduced or during branch road dead electricity, and the device in warning circuit is lost the job voltage, and its signal output is produced for off-state
Raw alarm signal.
Described rectifier circuit includes the first diode in parallel successively, the second diode, the 3rd diode, the four or two
Ac voltage rectifier can be DC voltage by pole pipe, rectifier circuit, and DC voltage input is had no effect, such as
This, described device can flexibly be applied to AC system and the power-off of straight-flow system monitors.
Described divider resistance includes the first divider resistance and the second divider resistance, and voltage-stabiliser tube includes the first voltage-stabiliser tube and the
Two voltage-stabiliser tubes, the positive pole of rectifier circuit output are sequentially connected in series the first divider resistance, the first voltage-stabiliser tube, the second voltage-stabiliser tube and second
The negative pole of rectifier circuit output is connected to after divider resistance.
The both ends connection warning circuit of the second described voltage-stabiliser tube, the also parallel connection before warning circuit is connected of the second voltage-stabiliser tube
There are the first filter capacitor and the second filter capacitor, the both ends of the second filter capacitor connect power supply VCC and connection ground wire GND respectively.
Described warning circuit includes current-limiting resistance, light coupling relay and alarm output terminal, No. 1 of light coupling relay
Connect power supply VCC after pin serial connection current-limiting resistance, No. 2 pin connection ground wire GND of light coupling relay, the of light coupling relay
3rd, No. 4 pin connection alarm output terminals.
Including multiple, each classified Monitoring device is sequentially connected in series together described classified Monitoring device, and formation one is defeated
Go out signal, be used in series the off-position monitoring for realizing a plurality of branch road of ac and dc systemses, when the alarm signal of entirety is closed form
During state, illustrate that each branch road power supply is normal in ac and dc systemses；When the output signal of entirety is off-state, illustrate alternating current-direct current
Branch road Loss of power failure in system be present.
The rear class of described power supply terminal is connected with fuse, and the fuse of quick fuse is sent out inside described device
When raw short-circuit can quick fuse, cut off the connection of equipment and ac and dc systemses, anti-locking apparatus internal short-circuit causes alterating and direct current
Source system short-circuit tripping fault.
Described divider resistance and voltage-stabiliser tube are adjustable type, the first divider resistance, the resistance of the second divider resistance and voltage stabilizing
The voltage stabilizing parameter of pipe can be adjusted arbitrarily, so as to realize the power-off to the bus and branch road of the ac and dc systemses of different voltage class
Monitoring, such as direct current 48V, 110V, 220V, alternating current 220V, 380V etc..
When monitoring AC power supply system, it is changed into direct current signal after the rectified bridge circuit rectification of alternating voltage, the first of rear class
Divider resistance, the first voltage-stabiliser tube, the second voltage-stabiliser tube, the second divider resistance carry out partial pressure, the second voltage-stabiliser tube both ends to DC voltage
Voltage obtains the work of the stabilization of light coupling relay in warning circuit after the first filter capacitor and the filtering of the second filter capacitor
Voltage VCC, VCC are connected to the control terminal of light coupling relay through current-limiting resistance, when lower limit of the alternating voltage normally or in permission
During the above, the operation voltage that VCC voltage can reach light coupling relay makes signal output be closure state, when bus or branch road
Light coupling relay is lost the job voltage during dead electricity, and its signal output produces alarm signal for off-state.
When monitoring DC power system, the first diode, the 3rd diode and the first divider resistance in rectifier circuit,
First voltage-stabiliser tube, the second voltage-stabiliser tube, the second divider resistance form bleeder circuit, and the second voltage-stabiliser tube both end voltage is through the first filtered electrical
Hold and after the filtering of the second filter capacitor, that is, obtain the operating voltage VCC, VCC of the stabilization of light coupling relay in warning circuit through limit
Leakage resistance is connected to the control terminal of light coupling relay.When DC voltage is normal or more than the lower limit of permission, VCC voltage
The operation voltage of light coupling relay, which can be reached, makes signal output be closure state, the light coupling relay when bus or branch road dead electricity
Lose the job voltage, its signal output produces alarm signal for off-state.
Power of alterating and direct current system busbar and feeder line branch road of the present invention power off monitoring method, including monitoring AC power
The step of the step of system and monitoring dc source, monitoring AC power supply system comprises the following steps：
S1, the A phase lines, B phase lines, C phase lines of AC power supply system connected into plant-grid connection terminal with N lines by external cabling
" +/L " poles and " -/N " poles；
S2, alternating voltage are changed into DC voltage after rectifier circuit rectification, pass through the first divider resistance, the second partial pressure
The series loop of resistance, the first voltage-stabiliser tube and the second voltage-stabiliser tube carries out partial pressure to above-mentioned DC voltage；
S3, the voltage VCC of the second voltage-stabiliser tube both ends pressure are obtained after the first filter capacitor and the filtering of the second filter capacitor
Stable operating voltage VCC, operating voltage VCC are connected to the control terminal of light coupling relay by current-limiting resistance；
If the alternating voltage in S4, step S2 is normal or in the limitation above of permission, operating voltage VCC can reach light
The operation voltage of coupling relay makes signal output be closure state；If when power of alterating and direct current bus or feeder line branch road dead electricity, optocoupler
Relay is lost the job voltage, and its signal output produces alarm signal for off-state.
Described monitoring dc source comprises the following steps：
S11, the " +/L " poles that the positive pole of dc source and negative pole are respectively connecting to plant-grid connection terminal by external cabling
" -/N " poles；
The first diode, the 3rd diode and the first divider resistance, the first voltage-stabiliser tube, second in S12, rectifier circuit
Voltage-stabiliser tube, the second divider resistance form bleeder circuit, and partial pressure is carried out to above-mentioned DC voltage；
S13, the voltage at the second voltage-stabiliser tube both ends are alarmed after the first filter capacitor and the filtering of the second filter capacitor
The operating voltage VCC of the stabilization of light coupling relay, operating voltage VCC are connected to the control of light coupling relay through current-limiting resistance in circuit
End processed；
If S14, DC voltage are normal or when more than the lower limit of permission, operating voltage VCC can reach optocoupler relay
The operation voltage of device makes signal output be closure state, if when power of alterating and direct current bus or feeder line branch road dead electricity, light coupling relay
Lose the job voltage, its signal output produces alarm signal for off-state.
The present invention compared with prior art, has the advantages that：
A kind of power of alterating and direct current system busbar and feeder line branch road power-off monitoring device and its method are provided, can be monitored in real time
The disconnection fault of power of alterating and direct current system busbar and feeder line branch road, and alarmed in time, it is flexible and convenient to use, mesh can be overcome
Fault detect blind area present in preceding monitoring alarm, real-time monitoring substation DC power system bus and feeder line branch road are
It is no power-off operation troubles occur, technical guarantee is provided for the safe operation of transformer station direct current system, for the bus or branch of appearance
Road powering-off state, notify staff to carry out defect elimination in time, prevent the generation of significant blackouts accident, avoid unnecessary economy
Loss, solves produced problem in the prior art.
Brief description of the drawings
Fig. 1 is that power of alterating and direct current system busbar of the present invention and feeder line branch road power off monitoring device circuit and connect block diagram；
Fig. 2 is that power of alterating and direct current system busbar of the present invention and feeder line branch road power off in monitoring method and monitor AC power supply system
Step flow chart；
Fig. 3 is that power of alterating and direct current system busbar of the present invention and feeder line branch road power off in monitoring method and monitor DC power system
Step flow chart；
In figure：X1, plant-grid connection terminal；FU, quick fuse fuse；D1, the first diode；D2, the second diode；
D3, the 3rd diode；D4, the 4th diode；R1, the first divider resistance；R2, the second divider resistance；R3, current limliting electricity
Resistance；DZ1, the first voltage-stabiliser tube；DZ2, the second voltage-stabiliser tube；C1, the first filter capacitor；C2, the second filter capacitor；U1, optocoupler relay
Device；X2, alarm output terminal.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples：
Embodiment 1：
As shown in figure 1, power of alterating and direct current system busbar of the present invention and feeder line branch road power-off monitoring device, including point
Level monitoring device, described classified Monitoring device include plant-grid connection terminal X1, divider resistance, voltage-stabiliser tube and warning circuit, electricity
Source access terminal X1 include " +/L " poles and " -/N " poles, plant-grid connection terminal X1 " +/L " poles pass through rectifier circuit connection electricity
Source access terminal " -/N " poles, the positive pole of rectifier circuit output are connected whole by the divider resistance that is sequentially connected in series with voltage-stabiliser tube
Flow the negative pole of bridge circuit output, the both ends connection warning circuit of voltage-stabiliser tube.
In order to further illustrate above-described embodiment, rectifier circuit includes the first diode D1 in parallel successively, the two or two
Pole pipe D2, the 3rd diode D3, the 4th diode D4.
In order to further illustrate above-described embodiment, divider resistance includes the first divider resistance R1 and the second divider resistance R2,
Voltage-stabiliser tube includes the first voltage-stabiliser tube DZ1 and the second voltage-stabiliser tube DZ2, and the positive pole of rectifier circuit output is sequentially connected in series the first partial pressure electricity
The negative pole of rectifier circuit output is connected to after resistance R1, the first voltage-stabiliser tube DZ1, the second voltage-stabiliser tube DZ2 and the second divider resistance R2.
In order to further illustrate above-described embodiment, the second voltage-stabiliser tube DZ2 both ends connection warning circuit, the second voltage-stabiliser tube
DZ2 is also parallel with the first filter capacitor C1 and the second filter capacitor C2 before warning circuit is connected, the second filter capacitor C2's
Both ends connect power supply VCC and connection ground wire GND respectively.
In order to further illustrate above-described embodiment, warning circuit includes current-limiting resistance R3, light coupling relay U1 and alarm is defeated
Go out terminal X2, connect power supply VCC after light coupling relay U1 No. 1 pin serial connection current-limiting resistance R3, the 2nd of light coupling relay U1 the
The connection of number pin ground wire GND, light coupling relay U1 the 3rd, No. 4 pin connection alarm output terminal X2.
In order to further illustrate above-described embodiment, classified Monitoring device including multiple, go here and there successively by each classified Monitoring device
It is linked togather, forms an output signal.
In order to further illustrate above-described embodiment, power supply terminal X1 rear class is connected with fuse FU.
In order to further illustrate above-described embodiment, divider resistance and voltage-stabiliser tube are adjustable type.
The operation principle of embodiment 1 is：1) when monitoring AC power supply system, first in the rectified bridge circuit of alternating voltage
It is changed into direct current signal after diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4 rectifications, the first of rear class
Divider resistance R1, the first voltage-stabiliser tube DZ1, the second voltage-stabiliser tube DZ2, the second divider resistance R2 to DC voltage carry out partial pressure, second
Voltage-stabiliser tube DZ2 both end voltages obtain optocoupler in warning circuit after the first filter capacitor C1 and the second filter capacitor C2 filtering
The operating voltage VCC, VCC of relay U1 stabilization are connected to the control terminal of light coupling relay through current-limiting resistance R3；
When alternating voltage is normal or more than the lower limit of permission, VCC voltage can reach light coupling relay U1's
Operation voltage makes signal output be closure state, and when bus or branch road dead electricity, light coupling relay U1 loses the job voltage, and it is believed
Number output for off-state produces alarm signal.
2) when monitoring DC power system, the first diode, the 3rd diode D3 and the first partial pressure in rectifier circuit
Resistance R1, the first voltage-stabiliser tube DZ1, the second voltage-stabiliser tube DZ2, the second divider resistance R2 form bleeder circuit, the second voltage-stabiliser tube DZ2 two
Terminal voltage obtains the steady of light coupling relay U1 in warning circuit after the first filter capacitor C1 and the second filter capacitor C2 filtering
Fixed operating voltage VCC, VCC is connected to the control terminal of light coupling relay through current-limiting resistance R3, when DC voltage is normal or is permitting
When more than lower limit perhaps, the operation voltage that VCC voltage can reach light coupling relay U1 makes signal output be closure state,
When bus or branch road dead electricity, light coupling relay U1 loses the job voltage, and its signal output produces alarm signal for off-state
Number.
Embodiment 2：
As Figure 2-3, power of alterating and direct current system busbar and feeder line branch road power-off monitoring method, including monitoring AC power
The step of the step of system and monitoring dc source, described monitoring AC power supply system comprises the following steps：
S1, the A phase lines, B phase lines, C phase lines of AC power supply system connected into plant-grid connection terminal with N lines by external cabling
X1 " +/L " poles and " -/N " poles；
S2, alternating voltage are changed into DC voltage after rectifier circuit rectification, by the first divider resistance R1, second point
Piezoresistance R2, the first voltage-stabiliser tube DZ1 and the second voltage-stabiliser tube DZ2 series loop carry out partial pressure to above-mentioned DC voltage；
S3, the voltage VCC of the second voltage-stabiliser tube DZ2 both ends pressure filter through the first filter capacitor C1 and the second filter capacitor C2
Afterwards, the operating voltage VCC stablized, operating voltage VCC are connected to light coupling relay U1 control terminal by current-limiting resistance R3；
If the alternating voltage in S4, step S2 is normal or in the limitation above of permission, operating voltage VCC can reach light
Coupling relay U1 operation voltage makes signal output be closure state；If when power of alterating and direct current bus or feeder line branch road dead electricity, light
Coupling relay U1 loses the job voltage, and its signal output produces alarm signal for off-state.
Described monitoring dc source comprises the following steps：
S11, the " +/L " that the positive pole of dc source and negative pole are respectively connecting to plant-grid connection terminal X1 by external cabling
Pole and " -/N " poles；
The first diode D1, the 3rd diode D3 and the first divider resistance R1, the first voltage stabilizing in S12, rectifier circuit
Pipe DZ1, the second voltage-stabiliser tube DZ2, the second divider resistance R2 form bleeder circuit, and partial pressure is carried out to above-mentioned DC voltage；
S13, the voltage at the second voltage-stabiliser tube DZ2 both ends are after the first filter capacitor C1 and the second filter capacitor C2 filtering, i.e.,
The operating voltage VCC of light coupling relay U1 stabilization in warning circuit is obtained, operating voltage VCC is connected to light through current-limiting resistance R3
Coupling relay U1 control terminal；
If S14, DC voltage are normal or when more than the lower limit of permission, operating voltage VCC can reach optocoupler relay
Device U1 operation voltage makes signal output be closure state, if when power of alterating and direct current bus or feeder line branch road dead electricity, optocoupler relay
Device U1 loses the job voltage, and its signal output produces alarm signal for off-state.
The above method goes to implement according to device.
Broken using the power of alterating and direct current system busbar and feeder line branch road of the embodiments of the invention described above in association with accompanying drawing
Power utilization monitoring device and its method, the disconnection fault of power of alterating and direct current system busbar and feeder line branch road can be monitored in real time, and in time
Alarmed, solve produced problem in the prior art.But the present invention is not limited to described embodiment, is not departing from
These change, modification, replacement and deformations for being carried out to embodiment still fall within this hair in the case of the principle and spirit of the present invention
In bright protection domain.
Claims (10)
1. a kind of power of alterating and direct current system busbar and feeder line branch road power-off monitoring device, it is characterised in that：Filled including classified Monitoring
Put, described classified Monitoring device includes plant-grid connection terminal (X1), divider resistance, voltage-stabiliser tube and warning circuit, plant-grid connection
Terminal (X1) include " +/L " poles and " -/N " poles, plant-grid connection terminal (X1) " +/L " poles connect power supply by rectifier circuit
Access terminal " -/N " poles, rectifier circuit output positive pole rectification is connected with voltage-stabiliser tube by the divider resistance being sequentially connected in series
The negative pole of bridge circuit output, the both ends connection warning circuit of voltage-stabiliser tube.
2. power of alterating and direct current system busbar according to claim 1 and feeder line branch road power-off monitoring device, it is characterised in that：
Described rectifier circuit includes the first diode (D1) in parallel successively, the second diode (D2), the 3rd diode (D3), the
Four diodes (D4).
3. power of alterating and direct current system busbar according to claim 1 and feeder line branch road power-off monitoring device, it is characterised in that：
Described divider resistance includes the first divider resistance (R1) and the second divider resistance (R2), and voltage-stabiliser tube includes the first voltage-stabiliser tube
(DZ1) and the second voltage-stabiliser tube (DZ2), the positive pole of the rectifier circuit output are sequentially connected in series the first divider resistance (R1), first
The negative pole of rectifier circuit output is connected to after voltage-stabiliser tube (DZ1), the second voltage-stabiliser tube (DZ2) and the second divider resistance (R2).
4. power of alterating and direct current system busbar according to claim 3 and feeder line branch road power-off monitoring device, it is characterised in that：
Described the second voltage-stabiliser tube (DZ2) both ends connection warning circuit, the second voltage-stabiliser tube (DZ2) before warning circuit is connected also simultaneously
The first filter capacitor (C1) and the second filter capacitor (C2) are associated with, the both ends of the second filter capacitor (C2) connect power supply VCC respectively
With connection ground wire GND.
5. power of alterating and direct current system busbar according to claim 4 and feeder line branch road power-off monitoring device, it is characterised in that：
Described warning circuit includes current-limiting resistance (R3), light coupling relay (U1) and alarm output terminal (X2), light coupling relay
(U1) No. 1 pin serial connection current-limiting resistance (R3) connects power supply VCC, No. 2 pin connection ground of light coupling relay (U1) afterwards
Line GND, the 3rd, No. 4 pin connection alarm output terminal (X2) of light coupling relay (U1).
6. power of alterating and direct current system busbar according to claim 1 and feeder line branch road power-off monitoring device, it is characterised in that：
Including multiple, each classified Monitoring device is sequentially connected in series together described classified Monitoring device, forms an output signal.
7. power of alterating and direct current system busbar according to claim 1 and feeder line branch road power-off monitoring device, it is characterised in that：
The rear class of described power supply terminal (X1) is connected with fuse (FU).
8. power of alterating and direct current system busbar according to claim 1 and feeder line branch road power-off monitoring device, it is characterised in that：
Described divider resistance and voltage-stabiliser tube are adjustable type.
9. a kind of power off monitoring method according to any described power of alterating and direct current system busbars of claim 1-8 and feeder line branch road,
It is characterized in that：Described method includes the step of the step of monitoring AC power supply system and monitoring dc source, described prison
AC power supply system is surveyed to comprise the following steps：
S1, the A phase lines, B phase lines, C phase lines of AC power supply system connected into plant-grid connection terminal (X1) with N lines by external cabling
" +/L " poles and " -/N " poles；
S2, alternating voltage are changed into DC voltage after rectifier circuit rectification, pass through the first divider resistance (R1), the second partial pressure
The series loop of resistance (R2), the first voltage-stabiliser tube (DZ1) and the second voltage-stabiliser tube (DZ2) carries out partial pressure to above-mentioned DC voltage；
S3, the voltage VCC of the second voltage-stabiliser tube (DZ2) both ends pressure filter through the first filter capacitor (C1) and the second filter capacitor (C2)
After ripple, the operating voltage VCC that is stablized, operating voltage VCC are connected to light coupling relay (U1) by current-limiting resistance (R3)
Control terminal；
If alternating voltage in S4, step S2 is normal or in the limitation above of permission, operating voltage VCC can reach optocoupler after
The operation voltage of electrical equipment (U1) makes signal output be closure state；If when power of alterating and direct current bus or feeder line branch road dead electricity, optocoupler
Relay (U1) is lost the job voltage, and its signal output produces alarm signal for off-state.
10. power of alterating and direct current system busbar according to claim 9 and feeder line branch road power-off monitoring method, its feature exist
In：Described monitoring dc source comprises the following steps：
S11, the " +/L " poles that the positive pole of dc source and negative pole are respectively connecting to plant-grid connection terminal (X1) by external cabling
" -/N " poles；
It is the first diode (D1), the 3rd diode (D3) in S12, rectifier circuit and the first divider resistance (R1), first steady
Pressure pipe (DZ1), the second voltage-stabiliser tube (DZ2), the second divider resistance (R2) form bleeder circuit, and above-mentioned DC voltage is divided
Pressure；
S13, the second voltage-stabiliser tube (DZ2) both ends voltage through the first filter capacitor (C1) and the second filter capacitor (C2) filtering after,
The operating voltage VCC of the stabilization of light coupling relay in warning circuit (U1) is obtained, operating voltage VCC connects through current-limiting resistance (R3)
It is connected to light coupling relay (U1) control terminal；
If S14, DC voltage are normal or when more than the lower limit of permission, operating voltage VCC can reach light coupling relay
(U1) operation voltage makes signal output be closure state, if when power of alterating and direct current bus or feeder line branch road dead electricity, optocoupler relay
Device (U1) is lost the job voltage, and its signal output produces alarm signal for off-state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711068075.3A CN107831401A (en) | 2017-11-03 | 2017-11-03 | Power of alterating and direct current system busbar and feeder line branch road power-off monitoring device and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711068075.3A CN107831401A (en) | 2017-11-03 | 2017-11-03 | Power of alterating and direct current system busbar and feeder line branch road power-off monitoring device and its method |
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| CN107831401A true CN107831401A (en) | 2018-03-23 |
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|---|---|---|---|
| CN201711068075.3A Withdrawn CN107831401A (en) | 2017-11-03 | 2017-11-03 | Power of alterating and direct current system busbar and feeder line branch road power-off monitoring device and its method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794339A (en) * | 2019-10-09 | 2020-02-14 | 国网山东省电力公司东平县供电公司 | Centralized acousto-optic alarm power-off indicator, mechanism and method |
| CN111031637A (en) * | 2019-11-21 | 2020-04-17 | 江苏鸿鹄无人机应用科技有限公司 | Warning condition illumination linkage device |
| CN112858948A (en) * | 2021-01-11 | 2021-05-28 | 湖北三鑫金铜股份有限公司 | Electric circuit instantaneous contact failure detection circuit |
| CN113922655A (en) * | 2021-10-18 | 2022-01-11 | 无锡市欧瑞杰电子科技有限公司 | PWM chip starts and loses electric warning circuit and switching power supply |
-
2017
- 2017-11-03 CN CN201711068075.3A patent/CN107831401A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794339A (en) * | 2019-10-09 | 2020-02-14 | 国网山东省电力公司东平县供电公司 | Centralized acousto-optic alarm power-off indicator, mechanism and method |
| CN111031637A (en) * | 2019-11-21 | 2020-04-17 | 江苏鸿鹄无人机应用科技有限公司 | Warning condition illumination linkage device |
| CN112858948A (en) * | 2021-01-11 | 2021-05-28 | 湖北三鑫金铜股份有限公司 | Electric circuit instantaneous contact failure detection circuit |
| CN113922655A (en) * | 2021-10-18 | 2022-01-11 | 无锡市欧瑞杰电子科技有限公司 | PWM chip starts and loses electric warning circuit and switching power supply |
| CN113922655B (en) * | 2021-10-18 | 2024-02-20 | 无锡市欧瑞杰电子科技有限公司 | PWM chip starting and power-off alarm circuit and switching power supply |
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Application publication date: 20180323 |