CN105785220A - Open-circuit prompting circuit and device for power system secondary loop regular checking assistance - Google Patents
Open-circuit prompting circuit and device for power system secondary loop regular checking assistance Download PDFInfo
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- CN105785220A CN105785220A CN201610322780.0A CN201610322780A CN105785220A CN 105785220 A CN105785220 A CN 105785220A CN 201610322780 A CN201610322780 A CN 201610322780A CN 105785220 A CN105785220 A CN 105785220A
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- power system
- secondary loop
- open circuit
- circuit
- regular inspection
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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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- General Physics & Mathematics (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention provides an open-circuit prompting circuit and device for power system secondary loop regular checking assistance. The open-circuit prompting circuit for power system secondary loop regular checking assistance comprises a relay, an alarm, a first power source and a second power source; the power source voltage of the two power sources is the same; the first power source is connected in series with the relay, and thereafter, is connected in parallel with the second power source; the alarm is connected in series with the normally-closed contact of the relay, and thereafter, is connected with two ends of the above parallel-connected part; and the two ends of the parallel-connected part are connected with a wiring plug respectively through soft conductors. With the open-circuit prompting circuit and device of the invention adopted, in a regular checking process, a related worker can be prompted to restore related connection sheets which are disconnected before regular checking to a connected state before disconnection. The open-circuit prompting circuit and device have the advantages of simple structure, easiness in implementation, convenience in use and high practicability.
Description
Technical field
The present invention relates to a kind of secondary loop in power system regular inspection auxiliary device, specifically a kind of secondary loop in power system regular inspection auxiliary open circuit alert circuit and device.
Background technology
In power system, in the regular inspection process to protection device, it usually needs the connection sheet of turn-off current or voltage terminal row, carry out the test of electric parameters dosage or the D.C. resistance test job be correlated with afterwards again.
And after above-mentioned detection work completes, the associated contact pin disconnected need to be recovered the connection status before extremely disconnecting, will not open a way with secondary circuit relevant after ensureing power transmission before detection.
But in actually detected process, often occurring after detection work completes, forgetting to recover the connection state before extremely disconnecting by connecting sheet, so that causing above-mentioned secondary circuit to open a way.And after secondary circuit is opened a way power transmission again, then have false protection, line disconnection and get rid of the danger of load, the safe and stable operation of electrical network will be threatened.
And in the prior art, not yet exist for forgeing, to above-mentioned, the alarm set that phenomenon is reminded, this is the deficiencies in the prior art part.
Summary of the invention
The technical problem to be solved is; for the deficiencies in the prior art; the secondary loop in power system regular inspection auxiliary open circuit alert circuit provide a kind of simple in construction, being easily achieved and device; for to protection device regular inspection work after, remind relevant staff by disconnects before regular inspection associated contact pin recovery to its disconnection before connection status.
For solving above-mentioned technical problem, the invention provides a kind of secondary loop in power system regular inspection auxiliary open circuit alert circuit, including relay, alarm, the first power supply and second source, the supply voltage of two power supplys is identical, after relay described in first power sources in series in parallel with second source, alarm is connected to the two ends of above-mentioned parallel connection part with the normally-closed contact of relay after connecting, the two ends of above-mentioned parallel connection part are also respectively connected with a connecting plug respectively through flexible circuit conductor.
When carrying out secondary loop in power system regular inspection, after staff opens the connection sheet of secondary loop in power system curtage terminal block, two connecting plugs are inserted the hole being arranged in both sides on respective terminal row, open in view of connecting sheet, and first the supply voltage of power supply and second source equal, relay does not have voltage drop, relay is failure to actuate, the normally-closed contact Guan Bi of relay, now second source, alarm is connected with the loop at the normally-closed contact place of relay, alarm sends warning reminding signal, so that the connection sheet reminding the respective terminal row of the relevant secondary circuit of relevant staff is now in off-state.
Once after the connection sheet of the above-mentioned secondary loop in power system curtage terminal block opened is resumed connection, the actuating of relay, the normally-closed contact of described relay disconnects, alarm stop alarm.
Described alarm includes voice guard and/or light crossing-signal.
Present invention also offers a kind of secondary loop in power system regular inspection auxiliary open circuit alarm set, including housing and secondary loop in power system regular inspection auxiliary open circuit alert circuit as above, the alarm of this open circuit alert circuit is installed on the housing, the relay of this open circuit alert circuit, the first power supply and second source are arranged in this housing, and the connecting plug of this open circuit alert circuit is arranged on outside this housing.
This secondary loop in power system regular inspection auxiliary open circuit alarm set includes above-mentioned secondary loop in power system regular inspection auxiliary open circuit alert circuit, it has the repertoire of above-mentioned secondary loop in power system regular inspection auxiliary open circuit alert circuit, does not repeat them here.Additionally, this secondary loop in power system regular inspection auxiliary open circuit alarm set is easy to carry and use.
Described housing is additionally provided with the drawer of a connecting plug described in folding and unfolding.When this secondary loop in power system regular inspection auxiliary open circuit alarm set is in idle state, can two described connecting plugs be left in this drawer, both be easy to depositing of connecting plug, it is possible to the unrest pendulum of two connecting plugs when preventing from carrying, attractive in appearance it is easy to carry again, comparatively practical.
The upper end of the front apron of described drawer is provided with two and is respectively used to the lower U-shaped gathering sill through described flexible circuit conductor, and the opening of two lower U-shaped gathering sills is all vertically upward.The use of lower U-shaped gathering sill, it is simple to described flexible circuit conductor is through the front apron of drawer, and then is easy to leave in described drawer above-mentioned two connecting plugs in.
Described housing is provided with two upper U-shaped gathering sills relative with described lower U-shaped gathering sill position respectively, all vertically down, each upper U-shaped gathering sill is respectively enclosed to for the strip groove through above-mentioned relevant flexible circuit conductor the opening of each upper U-shaped gathering sill with corresponding lower U-shaped gathering sill.Each upper U-shaped gathering sill is respectively enclosed to for the strip groove through above-mentioned relevant flexible circuit conductor with corresponding lower U-shaped gathering sill, and this can prevent the abrasion to flexible circuit conductor to a certain extent.
Described secondary loop in power system regular inspection auxiliary open circuit alarm set also includes the bobbin winoler of flexible circuit conductor described in folding and unfolding, it is simple to after flexible circuit conductor is packed up, also allowing for the used time lengthens flexible circuit conductor, uses flexible.
Described bobbin winoler includes three baffle plates and a rotating shaft, described rotating shaft is each passed through described three baffle plate, three baffle plates are vertically fixed in described rotating shaft, the two ends of described rotating shaft are installed in rotation on described housing, forming a winding space between adjacent screen respectively, two winding spaces are respectively used to the flexible circuit conductor described in folding and unfolding；One end of described rotating shaft is equipped with L-shaped handle, and this L-shaped handle includes cross bar and montant, and one end of described montant is vertical with described rotating shaft to be connected, the other end is connected with described cross bar；Described flexible circuit conductor connects one end of power supply and is respectively provided with the binding post cutting off with connecting current wire.This bobbin winoler be both easy to after flexible circuit conductor is packed up, also allow for the used time and again flexible circuit conductor lengthened, and simple in construction, facilitate implementation, comparatively practical.
The montant of described L-shaped handle is provided with the first screwed hole, described housing be provided with the first described screwed hole with the use of the second screwed hole and bolt.Screw off bolt, disconnect described binding post, axis of rotation can be regulated by L-shaped handle, to reach the purpose of folding and unfolding flexible circuit conductor；In time rotating adjustment and be complete, set up described bolt, the locking of countershaft, convenient use, comparatively practicality can be realized.
Described bolt is fixed on described housing by connector, can effectively prevent the loss of bolt.
Compared with prior art, it is an advantage of the current invention that:
(1) secondary loop in power system regular inspection auxiliary of the present invention open circuit alert circuit, including relay, alarm, the first power supply and second source, the supply voltage of two power supplys is identical, after relay described in first power sources in series in parallel with second source, alarm is connected to the two ends of above-mentioned parallel connection part with the normally-closed contact of relay after connecting, the two ends of above-mentioned parallel connection part are also respectively connected with a connecting plug respectively through flexible circuit conductor；When carrying out secondary loop in power system regular inspection, after staff opens the connection sheet of secondary loop in power system curtage terminal block, two connecting plugs are inserted the hole being arranged in both sides on respective terminal row, open in view of connecting sheet, and first the supply voltage of power supply and second source equal, relay does not have voltage drop, relay is failure to actuate, the normally-closed contact Guan Bi of relay, now second source, alarm is connected with the loop at the normally-closed contact place of relay, alarm sends warning reminding signal, so that the connection sheet reminding the respective terminal row of the relevant secondary circuit of relevant staff is now in off-state, to avoid after actually detected work completes, forget that the situation by the connection state connected before sheet recovers extremely disconnection occurs；
(2) secondary loop in power system regular inspection auxiliary open circuit alarm set of the present invention includes above-mentioned secondary loop in power system regular inspection auxiliary open circuit alert circuit, it has the repertoire of above-mentioned secondary loop in power system regular inspection auxiliary open circuit alert circuit, does not repeat them here；Additionally, this secondary loop in power system regular inspection auxiliary open circuit alarm set is easy to carry and use；
(3) housing of secondary loop in power system regular inspection auxiliary of the present invention open circuit alarm set is additionally provided with the drawer of a connecting plug described in folding and unfolding, make when this secondary loop in power system regular inspection auxiliary open circuit alarm set is in idle state, can two described connecting plugs be left in this drawer, both depositing of connecting plug it had been easy to, prevented also from the unrest pendulum of two connecting plugs when carrying, attractive in appearance it is easy to carry again, comparatively practical；
(4) secondary loop in power system regular inspection auxiliary of the present invention open circuit alarm set also includes the bobbin winoler of flexible circuit conductor described in folding and unfolding, be easy to after flexible circuit conductor is packed up, also allowing for the used time lengthens flexible circuit conductor, both the motility that the present invention uses can have been increased, also the volume of the present invention can be reduced, it is simple to the present invention carries.
As can be seen here, the present invention compared with prior art, has prominent substantive distinguishing features and significant progressive, and the beneficial effect of its enforcement is also apparent from.
Accompanying drawing explanation
Fig. 1 is the circuit theory schematic diagram of alert circuit of the present invention；
Fig. 2 is the structural representation of secondary loop in power system regular inspection auxiliary of the present invention open circuit alarm set；
Fig. 3 is the enlarged drawing at A place shown in Fig. 2；
Fig. 4 is the rearview schematic diagram of the open circuit alarm set of secondary loop in power system regular inspection auxiliary shown in Fig. 2.
nullWherein: 1、Housing，1.1、Upper U-shaped gathering sill，1.2、Pilot hole，1.3、Bolt，2、Open circuit alert circuit，2.1、Relay，2.2、Normally-closed contact，2.3、First power supply，2.4、Second source，2.5、Alarm，2.5.1、Voice guard，2.5.2、Light crossing-signal，2.6、Flexible circuit conductor，2.7、Connecting plug，3、Drawer，3.1、Front apron，3.1.1、Lower U-shaped gathering sill，4、Bobbin winoler，4.1、First baffle plate，4.2、Second baffle，4.3、Third gear plate，4.4、Rotating shaft，4.6、Winding space，5、Bearing block，6、L-shaped handle，6.1、Cross bar，6.2、Montant，7、Connector，8、The connection sheet of the curtage terminal block disconnected during secondary circuit regular inspection，9、Binding post，10、Wiring end cover，11、Binding post.
Detailed description of the invention
For making technical scheme and advantage clearly, below in conjunction with the accompanying drawing of the present invention, technical scheme is clearly and completely described.
As shown in Figure 1, a kind of secondary loop in power system regular inspection auxiliary open circuit alert circuit 2 of the present invention, including relay 2.1, alarm the 2.5, first power supply 2.3 and second source 2.4, the supply voltage of two power supplys is identical, after the relay 2.1 that first power supply 2.3 is connected described in parallel with second source 2.4, alarm 2.5 is connected to the two ends of above-mentioned parallel connection part with the normally-closed contact 2.2 of relay 2.1 after connecting, the two ends of above-mentioned parallel connection part are also respectively connected with a connecting plug 2.7 respectively through flexible circuit conductor 2.6.Described alarm 2.5 includes voice guard 2.5.1 and light crossing-signal 2.5.2(and adopts LED).For reducing the use of electric elements, an audible-visual annunciator can be adopted to substitute tut alarm 2.5.1 and two electric elements of light crossing-signal 2.5.2.
When carrying out secondary loop in power system regular inspection, the two ends connecting sheet 8 of the curtage terminal block disconnected when two connecting plugs 2.7 are connected on respectively secondary circuit regular inspection, open in view of connecting sheet, and first the supply voltage of power supply 2.3 and second source 2.4 equal, relay 2.1 do not have voltage drop, relay 2.1 is failure to actuate, the normally-closed contact 2.2 of relay 2.1 closes, now second source 2.4, alarm 2.5 is connected with the loop at normally-closed contact 2.2 place of relay 2.1, alarm 2.5 sends warning reminding signal, so that the connection sheet reminding the respective terminal row of the relevant secondary circuit of relevant staff is now in off-state.Once after the connection sheet of the above-mentioned secondary loop in power system curtage terminal block opened is resumed connection, relay 2.1 action, the normally-closed contact 2.2 of described relay 2.1 disconnects, alarm 2.5 stop alarm, and then plays reminding effect.
This detailed description of the invention additionally provides a kind of secondary loop in power system regular inspection auxiliary open circuit alarm set, assist by open circuit alert circuit 2 including housing 1 and secondary loop in power system regular inspection as indicated with 1, as shown in Figure 2, Figure 3 and Figure 4, the alarm 2.5 of this open circuit alert circuit 2 is arranged on this housing 1, relay 2.1, first power supply 2.3 of this open circuit alert circuit 2 and second source 2.4 are arranged in this housing 1, and the connecting plug 2.7 of this open circuit alert circuit 2 is arranged on outside this housing 1.Described flexible circuit conductor 2.6 is each passed through the pilot hole 1.2 being arranged on housing 1.Described housing 1 is additionally provided with the drawer 3 of a connecting plug 2.7 described in folding and unfolding.The upper end of the front apron 3.1 of described drawer 3 is provided with two and is respectively used to the lower U-shaped gathering sill 3.1.1 through described flexible circuit conductor 2.6, and the opening of two lower U-shaped gathering sill 3.1.1 is all vertically upward.Described housing 1 is provided with two upper U-shaped gathering sills 1.1 relative with described lower U-shaped gathering sill 3.1.1 position respectively, all vertically down, each upper U-shaped gathering sill 1.1 is respectively enclosed to for the strip groove through above-mentioned relevant flexible circuit conductor 2.6 opening of each upper U-shaped gathering sill 1.1 with corresponding lower U-shaped gathering sill 3.1.1.
Secondary loop in power system regular inspection auxiliary open circuit alarm set of the present invention includes above-mentioned secondary loop in power system regular inspection auxiliary open circuit alert circuit 2, it has the repertoire of above-mentioned secondary loop in power system regular inspection auxiliary open circuit alert circuit 2, does not repeat them here.
In addition, the use of drawer 3, make when this secondary loop in power system regular inspection auxiliary open circuit alarm set is in idle state, can two described connecting plugs 2.7 be left in this drawer 3, both depositing of connecting plug 2.7 it had been easy to, also prevent the unrest of two connecting plugs 2.7 when carrying pendulum, attractive in appearance be easy to carry again.When needs use this open circuit alarm set, extract drawer 3 out, take out connecting plug 2.7 and connect accordingly, install with very easy to use.
Additionally, the use of above-mentioned lower U-shaped gathering sill 3.1.1, it is simple to described flexible circuit conductor 2.6 is through the front apron 3.1 of drawer 3, and then is easy to leave in described drawer 3 above-mentioned two connecting plugs 2.7 in；Each upper U-shaped gathering sill 1.1 is respectively enclosed to, for the strip groove through above-mentioned relevant flexible circuit conductor 2.6, to prevent the abrasion to flexible circuit conductor 2.6 to a certain extent with corresponding lower U-shaped gathering sill 3.1.1.Simple in construction, practicality and facilitate implementation.
Additionally, in the present embodiment, described secondary loop in power system regular inspection auxiliary open circuit alarm set also includes the bobbin winoler 4 of flexible circuit conductor 2.6 described in folding and unfolding, be both easy to after flexible circuit conductor 2.6 is packed up, also allow for the used time and again flexible circuit conductor 2.6 lengthened.This bobbin winoler 4 includes rotating shaft 4.4 and three baffle plates: the first baffle plate 4.1, second baffle 4.2 and third gear plate 4.3.Described rotating shaft 4.4 is each passed through described three baffle plate, three baffle plates are vertically fixed in described rotating shaft 4.4, the two ends of described rotating shaft 4.4 are installed in rotation on described housing 1, forming a winding space 4.6 between adjacent screen respectively, two winding spaces 4.6 are respectively used to the flexible circuit conductor 2.6 described in folding and unfolding；One end of described rotating shaft 4.4 is equipped with L-shaped handle 6, and this L-shaped handle 6 includes cross bar 6.1 and montant 6.2, and one end of described montant 6.2 is vertical with described rotating shaft 4.4 to be connected, the other end is connected with described cross bar 6.1.The montant 6.2 of described L-shaped handle 6 is provided with the first screwed hole, described housing 1 be provided with the first described screwed hole with the use of the second screwed hole and bolt 1.3.
In the present embodiment, each flexible circuit conductor 2.6 be respectively provided with for the one end connecting power supply cut off with connect the two of current flexible circuit conductor with the use of binding post 9 and binding post 11；Its middle connecting terminal 11 is separately positioned on the end of the one end away from connecting plug 2.7 of the relevant flexible circuit conductor 2.6 being around in rotating shaft 4.4.In addition, in the two ends of the part that flexible circuit conductor 2.6 is around in rotating shaft 4.4, the one end for installing associated connections terminal is fixed on rotating shaft 4.4, namely the one end being used for installing binding post 11 on each flexible circuit conductor 2.6 is fixedly installed to described rotating shaft 4.4, and this is easy to by the flexible circuit conductor 2.6 described in rotating shaft 4.4 folding and unfolding.
Additionally, be provided with the wiring end cover 10 relative with described binding post 9 and binding post 11 position on the rear wall of housing 1, as shown in Figure 4, this wiring end cover 10 is opened, it is simple to carry out disconnection and the attended operation of above-mentioned binding post 9 and binding post 11.
During use, screw off bolt 1.3, disconnect binding post 9 and binding post 11, rotating shaft 4.4 can be regulated by L-shaped handle 6 and rotate, reach the purpose of folding and unfolding flexible circuit conductor 2.6.In time rotating adjustment and be complete, set up described bolt 1.3, the locking of countershaft 4.4 can be realized, and then the broken volume of the coil of the flexible circuit conductor 2.6 being wound in each winding space 4.6 can be prevented, in order to use smoothly with next time when previous, comparatively practical.
In the present embodiment, the loss of bolt 1.3 during for preventing from using, described bolt 1.3 is fixed on described housing 1 by connector 7.Described connector 7 adopts STAINLESS STEEL CHAINS.
To sum up; the protection device of power system is being carried out in the process of regular inspection; can not only remind relevant staff the associated contact pin that disconnects before regular inspection is recovered to its disconnect before connection status, and also simple in construction, facilitate implementation, easy to use, comparatively practical.
Embodiment of above only in order to technical scheme to be described, is not intended to limit；Although the present invention being described in detail with reference to aforementioned embodiments, it will be understood by those within the art that: the technical scheme described in aforementioned each embodiment still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the present invention.
Claims (10)
1. a secondary loop in power system regular inspection auxiliary open circuit alert circuit, it is characterized in that, including relay, alarm, the first power supply and second source, the supply voltage of two power supplys is identical, after relay described in first power sources in series in parallel with second source, alarm is connected to the two ends of above-mentioned parallel connection part with the normally-closed contact of relay after connecting, the two ends of above-mentioned parallel connection part are also respectively connected with a connecting plug respectively through flexible circuit conductor.
2. secondary loop in power system regular inspection auxiliary according to claim 1 open circuit alert circuit, it is characterised in that described alarm includes voice guard and/or light crossing-signal.
3. a secondary loop in power system regular inspection auxiliary open circuit alarm set, it is characterized in that, including housing and secondary loop in power system regular inspection auxiliary open circuit alert circuit as claimed in claim 1 or 2, the alarm of this open circuit alert circuit is installed on the housing, the relay of this open circuit alert circuit, the first power supply and second source are arranged in this housing, and the connecting plug of this open circuit alert circuit is arranged on outside this housing.
4. secondary loop in power system regular inspection auxiliary according to claim 3 open circuit alarm set, it is characterised in that be additionally provided with the drawer of a connecting plug described in folding and unfolding on described housing.
5. secondary loop in power system regular inspection auxiliary according to claim 4 open circuit alarm set, it is characterized in that, the upper end of the front apron of described drawer is provided with two and is respectively used to the lower U-shaped gathering sill through described flexible circuit conductor, and the opening of two lower U-shaped gathering sills is all vertically upward.
6. secondary loop in power system regular inspection auxiliary according to claim 5 open circuit alarm set, it is characterized in that, described housing is provided with two upper U-shaped gathering sills relative with described lower U-shaped gathering sill position respectively, all vertically down, each upper U-shaped gathering sill is respectively enclosed to for the strip groove through above-mentioned relevant flexible circuit conductor the opening of each upper U-shaped gathering sill with corresponding lower U-shaped gathering sill.
7. secondary loop in power system regular inspection auxiliary according to claim 3 open circuit alarm set, it is characterised in that described secondary loop in power system regular inspection auxiliary open circuit alarm set also includes the bobbin winoler of flexible circuit conductor described in folding and unfolding.
8. secondary loop in power system regular inspection auxiliary according to claim 7 open circuit alarm set, it is characterized in that, described bobbin winoler includes three baffle plates and a rotating shaft, described rotating shaft is each passed through described three baffle plate, three baffle plates are vertically fixed in described rotating shaft, the two ends of described rotating shaft are installed in rotation on described housing, form a winding space between adjacent screen respectively, and two winding spaces are respectively used to the flexible circuit conductor described in folding and unfolding；One end of described rotating shaft is equipped with L-shaped handle, and this L-shaped handle includes cross bar and montant, and one end of described montant is vertical with described rotating shaft to be connected, the other end is connected with described cross bar；Described flexible circuit conductor connects one end of power supply and is respectively provided with the binding post cutting off with connecting current wire.
9. secondary loop in power system regular inspection auxiliary according to claim 8 open circuit alarm set, it is characterized in that, the montant of described L-shaped handle is provided with the first screwed hole, described housing be provided with the first described screwed hole with the use of the second screwed hole and bolt.
10. secondary loop in power system regular inspection auxiliary according to claim 9 open circuit alarm set, it is characterised in that described bolt is fixed on described housing by connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610322780.0A CN105785220B (en) | 2016-05-16 | 2016-05-16 | A kind of secondary loop in power system regular inspection auxiliary open circuit alert circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610322780.0A CN105785220B (en) | 2016-05-16 | 2016-05-16 | A kind of secondary loop in power system regular inspection auxiliary open circuit alert circuit and device |
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| Publication Number | Publication Date |
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| CN105785220A true CN105785220A (en) | 2016-07-20 |
| CN105785220B CN105785220B (en) | 2018-05-08 |
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| CN201610322780.0A Active CN105785220B (en) | 2016-05-16 | 2016-05-16 | A kind of secondary loop in power system regular inspection auxiliary open circuit alert circuit and device |
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| CN106546866A (en) * | 2016-10-21 | 2017-03-29 | 北京首都机场动力能源有限公司 | A kind of method and device of test secondary circuit pressing plate break-make |
| CN110286295A (en) * | 2019-05-13 | 2019-09-27 | 国家电网有限公司 | A kind of direct current feed control panel branch CT polarity test device and method |
| CN113296026A (en) * | 2021-05-19 | 2021-08-24 | 广东电网有限责任公司 | Secondary circuit monitoring system |
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| CN113296026A (en) * | 2021-05-19 | 2021-08-24 | 广东电网有限责任公司 | Secondary circuit monitoring system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105785220B (en) | 2018-05-08 |
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