CN107942190A - Measuring equipment electrified automatic alarm formula device for detecting polarity - Google Patents
Measuring equipment electrified automatic alarm formula device for detecting polarity Download PDFInfo
- Publication number
- CN107942190A CN107942190A CN201711144912.6A CN201711144912A CN107942190A CN 107942190 A CN107942190 A CN 107942190A CN 201711144912 A CN201711144912 A CN 201711144912A CN 107942190 A CN107942190 A CN 107942190A
- Authority
- CN
- China
- Prior art keywords
- measuring head
- cathode
- anode
- operation lever
- automatic alarm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- G01R31/72—Testing of electric windings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The present invention relates to a kind of measuring equipment electrified automatic alarm formula device for detecting polarity, belong to electric-power metering technical field.The present invention includes cathode measuring head, anode measuring head, adjusts swivel joint, telescopic operation lever, vibrations ring and operation handle, cathode measuring head and anode measuring head, which are movably set in, to be adjusted on swivel joint, adjust the end that swivel joint is fixedly installed in telescopic operation lever, cathode measuring head and anode measuring head and make 360 degree of rotations relative to telescopic operation lever by adjusting swivel joint；The front end of telescopic operation lever is fixedly connected with operation handle, and vibrations ring is between telescopic operation lever and operation handle；Range radar and alarm lamp are provided with vibrations ring；Live detection module built in cathode measuring head and anode measuring head difference.Measuring equipment electrified automatic alarm formula device for detecting polarity of the present invention once detects that busbar is powered, and alarm lamp will send alarm light, while shakes ring and put and will send vibration reminding information.
Description
Technical field
The present invention relates to a kind of measuring equipment electrified automatic alarm formula device for detecting polarity, belongs to electric-power metering technology neck
Domain.
Background technology
Need to carry out Check up polarity to mutual inductor after mutual inductor new clothes or failure replacement to ensure the accurate of electric-power metering.Electricity
The primary side of power metering voltage transformer (PT) and current transformer (CT) is provided detection power supply by the dry cell of 1.5V and is led to
Cross switch and carry out on-off line operation, carrying out polarity by pointer multimeter (getting to DC current shelves) in the secondary side of PT and CT sentences
It is disconnected.The electrical principle of mutual inductor polarity detection is as follows：(1) the polarity calibrating principle of current transformer：Current transformer polarity is reflected
Determine the measurement of method, the current transformer generally use subtractive polarity connection in electric-power metering work.It can complete to count according to the principle
The calibration operation of current transformer polarity in amount scene.(2) the polarity identification principle of voltage transformer：Voltage is checked with direct current method
During mutual inductor, the positive terminal of DC power supply should be connected with the high-pressure side of voltage transformer, and the negative pole end and voltage of DC power supply are mutual
The low-pressure side of sensor is connected, and DC current is passed through in the primary side of TV, in the secondary side shunt voltage table of TV.Work as primary circuit
Switch S closures moment, observation voltage list index is directed toward positive direction by zero, then the polarity sign of voltage transformer is correct；Instead
It, then polarity indicates mistake.
But above-mentioned routine transformer Check up polarity mode has the following disadvantages：(1) cathode and negative on the dry cell of 1.5V
Extremely upper connecting wire, this 2 conducting wires respectively easily occur connection and are directly connected to or are indirectly connected with causing battery by other conductors
Short circuit dischange, shorter battery life；(2) mutual inductor is generally installed on deeper, high position in conventional metering cabinet, and part is located at
The metering cabinet lighting condition of basement is poor, and operating personnel usually requires to be operated by ascending tool, it is sometimes desirable in high pressure
Mutual inductor polarity detection work is carried out in the case that inlet wire is powered, causes metering cabinet powered extremely if there is service entrance switch, just
There is Danger Electric shock risk in the operating personnel for carrying out mutual inductor polarity detection.
The content of the invention
In view of the foregoing defects the prior art has, the present invention proposes a kind of new measuring equipment electrified automatic alarm formula
Device for detecting polarity, once service entrance switch causes metering cabinet powered extremely, equipment live detector will send sound and light alarm signal,
Prompt equipment live.
The present invention is realized using following technical solution：Measuring equipment electrified automatic alarm formula pole of the present invention
Property detection device, including cathode measuring head and anode measuring head, further include and adjust swivel joint, telescopic operation lever, vibrations ring
And operation handle, cathode measuring head and anode measuring head are movably set in and adjust on swivel joint, adjust swivel joint and fix
The end of telescopic operation lever is installed on, cathode measuring head and anode measuring head are by adjusting swivel joint relative to telescopic behaviour
Make bar and make 360 degree of rotations；The front end of telescopic operation lever is fixedly connected with operation handle, vibrations ring be located at telescopic operation lever with
Between operation handle；Range radar and alarm lamp are provided with vibrations ring；In cathode measuring head and anode measuring head difference
Live detection module is put, once detecting that busbar is powered, alarm lamp will send alarm light, while shake ring and put and will send
Vibration reminding information.
The present invention detects the powered detection device of busbar in the case where not powering off, do not relocate, thus effectively prevent into
Wiretap causes metering cabinet powered extremely, alarms if line failure, has effectively ensured power equipment and people
The safety of member.Device of the present invention using it is easy, be easy to carry about with one, safety coefficient it is high, be that power utility check personnel are rare
Detection instrument.
Preferably, illumination probe controlling switch, Operation switch, reset controller and electricity are provided with the operation handle
Pond.In hand-held operation handle, include illumination probe controlling switch, Operation switch, battery successively from bottom to top and reset control
Device, wherein illumination probe controlling switch, Operation switch are arranged side by side is located at manipulator in operation handle bottom, reset controller
Handle is close to the lower section of vibrations ring.
Preferably, two pieces of range radars are provided with the vibrations ring, range radar is located at vibrations ring towards telescopic behaviour
Make bar side.Electric vibrator is provided with vibrations ring, vibration reminding message is sent when needing.
Preferably, four sections of the telescopic operation lever point, every section of intersection is connected by body of rod card key, flexible by four sections
After formula operation lever all pulls out, body of rod card key is in self-locking state, and resetting spring is in extended state.
The length for selecting telescopic operation lever according to being actually needed, the body of rod of different length is kept by body of rod card key.When
After pressing reset controller, body of rod card key failure, the body of rod is contracted to original state by the restoring force of resetting spring, waits make next time
With.
Preferably, suitable shape is arrived in the adjusting swivel joint and the aperture of cathode measuring head and anode measuring head, adjusting
After state, cathode measuring head and anode measuring head are contacted with busbar to be measured respectively.Adjust swivel joint and be built-in with bearing, can be with
Realize 360 degree of rotations of cathode measuring head and anode measuring head.
Preferably, the end of the cathode measuring head and anode measuring head is the exposed copper wire of multiply, respectively with battery just
Anode is connected, and is wherein connected to Operation switch between anode and cathode measuring head, when cathode measuring head and anode are tested
After head contacts well with busbar to be measured respectively, pass through control operation and switch completion mutual inductor polarity test job.
Preferably, an illumination probe is each provided with the outside of the cathode measuring head and anode measuring head, in illumination probe
It is provided with headlamp, the probe controlling switch of illumination probe attended operation handle.
Preferably, if metering cabinet internal light is dark, illumination probe controlling switch is opened, the headlamp in illumination probe will
Light, the light intensity inside metering cabinet is improved, to ensure smoothly completing for mutual inductor polarity test job.
Preferably, the battery uses high-capacity lithium battery, it leads between two parts operation handle being threadedly coupled
Cross rotation and remove the replacement that end section realizes battery.
The beneficial effects of the invention are as follows：Filled using measuring equipment electrified automatic alarm formula Check up polarity of the present invention
Put, the powered detection device of busbar is detected in the case where not powering off, do not relocate, so as to effectively prevent service entrance switch from leading extremely
Cause metering cabinet powered, alarm if line failure, effectively ensured power equipment and the safety of personnel.This hair
The bright device using it is easy, be easy to carry about with one, safety coefficient it is high, be the rare detection instrument of power utility check personnel.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention.
In figure：1st, operation handle；2nd, illumination probe controlling switch；3rd, Operation switch；4th, reset controller；5th, ring is shaken；
6th, cathode measuring head；7th, anode measuring head；8th, swivel joint is adjusted；9th, illumination probe；10th, alarm lamp；11st, body of rod card
Key；12nd, resetting spring；13rd, telescopic operation lever；14th, range radar；15th, battery.
Embodiment
In order to which the object of the invention, technical solution is more clearly understood, with reference to embodiment, the present invention is made further
Describe in detail.
Embodiment one：
The present invention detects the powered detection device of busbar in the case where not powering off, do not relocate, thus effectively prevent into
Wiretap causes metering cabinet powered extremely, alarms if line failure, has effectively ensured power equipment and people
The safety of member.Device of the present invention using it is easy, be easy to carry about with one, safety coefficient it is high, be that power utility check personnel are rare
Detection instrument.
As shown in Figure 1, measuring equipment electrified automatic alarm formula device for detecting polarity of the present invention, mainly including cathode
Measuring head 6, anode measuring head 7, adjust swivel joint 8, telescopic operation lever 13,1 several parts of vibrations ring 5 and operation handle.
Wherein, illumination probe controlling switch 2, Operation switch 3, reset controller 4 and electricity are provided with the operation handle 1
Pond 15.In hand-held operation handle 1, include illumination probe controlling switch 2, Operation switch 3, battery 15 successively from bottom to top and answer
, reset controller bottom in operation handle 1 is arranged side by side in level controller 4, wherein illumination probe controlling switch 2, Operation switch 3
4 positioned at the lower section of the close vibrations ring 5 of operation handle 1.
The vibrations ring 5 is between telescopic operation lever 13 and operation handle 1；Range radar is provided with vibrations ring 5
14 and alarm lamp 10, shake and two pieces of range radars 14 are provided with ring 5, range radar 14 is positioned at vibrations ring 5 towards flexible
13 side of formula operation lever.Electric vibrator is provided with vibrations ring 5, vibration reminding message is sent when needing.Ranging thunder
Purpose up to 14 is measured from radar range-to-go, so as to judge whether to get too close to busbar, gives operating personnel to provide peace
Full protection.
The telescopic operation lever 13 divides four sections, and every section of intersection is connected by body of rod card key 11, telescopic by four sections
After operation lever 13 all pulls out, body of rod card key 11 is in self-locking state, and resetting spring 12 is in extended state.Selected according to being actually needed
The length of telescopic operation lever 13, the body of rod of different length is kept by body of rod card key 11.After reset controller 4 are pressed, bar
Body card key 11 fails, and the body of rod is contracted to original state by the restoring force of resetting spring 12, waits use next time.Telescopic operation lever 13
Front end be fixedly connected with operation handle 1.
The adjusting swivel joint 8 and aperture of cathode measuring head 6 and anode measuring head 7, adjust to proper states it
Afterwards, cathode measuring head 6 and anode measuring head 7 are contacted with busbar to be measured respectively.Adjust swivel joint 8 and be built-in with bearing, can be with
Realize 360 degree of rotations of cathode measuring head 6 and anode measuring head 7.Cathode measuring head 6 and anode measuring head 7 are movably set in
Adjust on swivel joint 8, adjust the end that swivel joint 8 is fixedly installed in telescopic operation lever 13, cathode measuring head 6 and anode
Measuring head 7 makees 360 degree of rotations by adjusting swivel joint 8 relative to telescopic operation lever 13.
Live detection module built in cathode measuring head 6 and anode measuring head 7 difference, once detect that busbar is powered,
Alarm lamp 10 will send alarm light, while shake ring 5 and put and will send vibration reminding information.6 He of cathode measuring head
The end of anode measuring head 7 is the exposed copper wire of multiply, and the positive and negative anodes with battery 15 are connected respectively, wherein 15 cathode of battery with just
Operation switch 3 is connected between pole measuring head 6, when cathode measuring head 6 and anode measuring head 7 contact well with busbar to be measured respectively
Afterwards, mutual inductor polarity test job is completed by control operation switch 3.
The outside of the cathode measuring head 6 and anode measuring head 7 is each provided with an illumination probe 9, is set in illumination probe 9
There are headlamp, the probe controlling switch of 9 attended operation handle 1 of illumination probe.If metering cabinet internal light is dark, opens illumination and visit
Head controlling switch 2, the headlamp in illumination probe 9 will be lighted, and the light intensity inside metering cabinet be improved, to ensure mutual inductor pole
Property test job smoothly completes.
The battery 15 uses high-capacity lithium battery 15, it passes through between two parts operation handle 1 being threadedly coupled
The replacement that end section realizes battery 15 is removed in rotation.
Embodiment two：
The use process of measuring equipment electrified automatic alarm formula device for detecting polarity of the present invention is as follows：It is telescopic
Operation lever 13 divides four sections, and every section of intersection is connected by body of rod card key 11, after four sections of telescopic operation levers 13 are all pulled out,
Body of rod card key 11 is in self-locking state, and resetting spring 12 is in extended state.Adjust swivel joint 8 and cathode measuring head 6 and anode
The aperture of measuring head 7, after adjusting proper states, cathode measuring head 6 and anode measuring head 7 are connect with busbar to be measured respectively
To touch, the end of cathode measuring head 6 and anode measuring head 7 is the exposed copper wire of multiply, and the positive and negative anodes with battery 15 are connected respectively, its
Be connected to Operation switch 3 between middle 15 cathode of battery and cathode measuring head 6, when cathode measuring head 6 and anode measuring head 7 respectively with
After busbar contact to be measured is good, mutual inductor polarity test job is completed by control operation switch 3.If metering cabinet interior lights
Line is dark, can open illumination probe controlling switch 2 at this time, and the headlamp in illumination probe 9 will be lighted at this time, improves inside metering cabinet
Light intensity, to ensure smoothly completing for mutual inductor polarity test job.
The present invention is when carrying out polarity test, it is possible to provide following defencive function：Cathode measuring head 6 and anode measuring head 7 divide
Not built-in live detection module, once detecting that busbar is powered, alarm lamp 10 will send alarm light, while shake ring 5
Vibration reminding information will be sent by putting.
The present invention can be widely used in applied to electric-power metering industry mutual inductor new clothes and replacement operation occasion.
The foregoing is merely presently preferred embodiments of the present invention, oneself, is not limitation with the present invention, all in essence of the invention
Impartial modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the patent covering scope of the present invention.
Claims (9)
1. a kind of measuring equipment electrified automatic alarm formula device for detecting polarity, including cathode measuring head (6) and anode measuring head
(7), it is characterised in that further include and adjust swivel joint (8), telescopic operation lever (13), vibrations ring (5) and operation handle (1),
Cathode measuring head (6) and anode measuring head (7), which are movably set in, to be adjusted on swivel joint (8), and it is fixed to adjust swivel joint (8)
The end of telescopic operation lever (13) is installed on, cathode measuring head (6) and anode measuring head (7) are by adjusting swivel joint (8)
Make 360 degree of rotations relative to telescopic operation lever (13)；The front end of telescopic operation lever (13) is fixedly connected with operation handle
(1), ring (5) is shaken between telescopic operation lever (13) and operation handle (1)；Range radar is provided with vibrations ring (5)
(14) and alarm lamp (10)；Live detection module built in cathode measuring head (6) and anode measuring head (7) difference, once inspection
It is powered to measure busbar, alarm lamp (10) will send alarm light, while shake ring (5) and put and will send vibration reminding information.
2. measuring equipment electrified automatic alarm formula device for detecting polarity according to claim 1, it is characterised in that the behaviour
Make to be provided with illumination probe controlling switch (2), Operation switch (3), reset controller (4) and battery (15) on handle (1).
3. measuring equipment electrified automatic alarm formula device for detecting polarity according to claim 1, it is characterised in that the shake
Two pieces of range radars (14) are provided with rotating ring (5), range radar (14) is located at vibrations ring (5) towards telescopic operation lever (13)
Side.
4. measuring equipment electrified automatic alarm formula device for detecting polarity according to claim 1, it is characterised in that described to stretch
Four sections of contracting formula operation lever (13) point, every section of intersection is connected by body of rod card key (11), by four sections of telescopic operation levers (13)
After all pulling out, body of rod card key (11) is in self-locking state, and resetting spring (12) is in extended state.
5. measuring equipment electrified automatic alarm formula device for detecting polarity according to claim 1, it is characterised in that the tune
Swivel joint (8) and the aperture of cathode measuring head (6) and anode measuring head (7) are saved, after adjusting proper states, by cathode
Measuring head (6) and anode measuring head (7) are contacted with busbar to be measured respectively.
6. measuring equipment electrified automatic alarm formula device for detecting polarity according to claim 5, it is characterised in that it is described just
The end of pole measuring head (6) and anode measuring head (7) is the exposed copper wire of multiply, and the positive and negative anodes with battery (15) are connected respectively,
Operation switch (3) wherein is connected between battery (15) cathode and cathode measuring head (6), when cathode measuring head (6) and anode are surveyed
After examination head (7) contacts well with busbar to be measured respectively, (3) are switched by control operation and complete mutual inductor polarity test job.
7. the measuring equipment electrified automatic alarm formula device for detecting polarity according to claim 1 or 6, it is characterised in that institute
State and an illumination probe (9) is each provided with the outside of cathode measuring head (6) and anode measuring head (7), illumination probe is provided with (9)
Headlamp, the probe controlling switch of illumination probe (9) attended operation handle (1).
8. measuring equipment electrified automatic alarm formula device for detecting polarity according to claim 7, it is characterised in that if meter
Amount cabinet internal light is dark, opening illumination probe controlling switch (2), and the headlamp in illumination probe (9) will be lighted, and improve metering cabinet
Internal light intensity, to ensure smoothly completing for mutual inductor polarity test job.
9. measuring equipment electrified automatic alarm formula device for detecting polarity according to claim 2, it is characterised in that the electricity
Pond (15) uses high-capacity lithium battery (15), it is removed between two parts operation handle (1) being threadedly coupled by rotation
End section realizes the replacement of battery (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711144912.6A CN107942190A (en) | 2017-11-17 | 2017-11-17 | Measuring equipment electrified automatic alarm formula device for detecting polarity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711144912.6A CN107942190A (en) | 2017-11-17 | 2017-11-17 | Measuring equipment electrified automatic alarm formula device for detecting polarity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107942190A true CN107942190A (en) | 2018-04-20 |
Family
ID=61932859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711144912.6A Pending CN107942190A (en) | 2017-11-17 | 2017-11-17 | Measuring equipment electrified automatic alarm formula device for detecting polarity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107942190A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633514A (en) * | 2018-12-29 | 2019-04-16 | 国网山东省电力公司淄博供电公司 | A kind of active defense formula electric power mutual-inductor polarity tester |
| CN110470896A (en) * | 2019-07-31 | 2019-11-19 | 张红宾 | A kind of hand-held flexible sensor device that can show electrification |
| CN112378486A (en) * | 2020-10-22 | 2021-02-19 | 天津杰士电池有限公司 | Battery liquid level height testing device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344877A (en) * | 2013-06-18 | 2013-10-09 | 国家电网公司 | Potable polarity test rod |
| CN203630202U (en) * | 2013-12-31 | 2014-06-04 | 中国石油天然气集团公司 | An acousto-optic vibration type high voltage electroscope |
| CN204066336U (en) * | 2014-09-28 | 2014-12-31 | 国家电网公司 | Protection against electric shock radar short-distance alarm device |
| CN205828988U (en) * | 2016-07-31 | 2016-12-21 | 大江控股集团电力科技有限公司 | A kind of electrification in high voltage distance alarm insulating bar |
| CN106370921A (en) * | 2016-11-16 | 2017-02-01 | 国网安徽省电力公司岳西县供电公司 | Wireless transmission-based bidirectional display electroscope |
-
2017
- 2017-11-17 CN CN201711144912.6A patent/CN107942190A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344877A (en) * | 2013-06-18 | 2013-10-09 | 国家电网公司 | Potable polarity test rod |
| CN203630202U (en) * | 2013-12-31 | 2014-06-04 | 中国石油天然气集团公司 | An acousto-optic vibration type high voltage electroscope |
| CN204066336U (en) * | 2014-09-28 | 2014-12-31 | 国家电网公司 | Protection against electric shock radar short-distance alarm device |
| CN205828988U (en) * | 2016-07-31 | 2016-12-21 | 大江控股集团电力科技有限公司 | A kind of electrification in high voltage distance alarm insulating bar |
| CN106370921A (en) * | 2016-11-16 | 2017-02-01 | 国网安徽省电力公司岳西县供电公司 | Wireless transmission-based bidirectional display electroscope |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633514A (en) * | 2018-12-29 | 2019-04-16 | 国网山东省电力公司淄博供电公司 | A kind of active defense formula electric power mutual-inductor polarity tester |
| CN109633514B (en) * | 2018-12-29 | 2021-04-06 | 国网山东省电力公司淄博供电公司 | Active protection type polarity tester for power transformer |
| CN110470896A (en) * | 2019-07-31 | 2019-11-19 | 张红宾 | A kind of hand-held flexible sensor device that can show electrification |
| CN112378486A (en) * | 2020-10-22 | 2021-02-19 | 天津杰士电池有限公司 | Battery liquid level height testing device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105137161A (en) | Digital composite functional high-voltage electroscope | |
| CN107942190A (en) | Measuring equipment electrified automatic alarm formula device for detecting polarity | |
| CN110632450B (en) | Intelligent low-voltage distribution network patrol instrument device | |
| CN206209042U (en) | Instrument for testing polarity of current transformer | |
| CN206573667U (en) | Possesses the polarity testing device of current transformer of self-checking function | |
| WO2021258763A1 (en) | Socket detection device and method supporting ground wire and zero wire anomaly detection | |
| CN209248005U (en) | A kind of polarity detector for current transformer | |
| CN110244103A (en) | A kind of clamp on amperemeter based on Rogowski coil | |
| CN106841810A (en) | Insulator detector | |
| CN105182173B (en) | Novel composite mutual inductor polarity tester | |
| CN201373906Y (en) | Portable insulation rod or cord experiment device | |
| CN105259466A (en) | A mutual inductor polarity test acousto-optic alarm instrument | |
| CN208140790U (en) | Convenient for the real-time electroscope of Fast Installation | |
| CN201562047U (en) | Power frequency high voltage generator | |
| CN207133416U (en) | A kind of mutual inductor polarity test system | |
| CN110108851A (en) | A kind of portable heavy metal pollution detection device | |
| CN214252508U (en) | Electric leakage test detection device of circuit breaker | |
| CN213457325U (en) | Socket detection device supporting abnormal detection of ground wire zero line | |
| CN108519539A (en) | A kind of remote electric wiring on-off detector | |
| CN212083530U (en) | Improved high-voltage electroscope | |
| CN207967744U (en) | Operation rod for electricity inspection | |
| CN209525442U (en) | DC simulation resistance generator | |
| CN208172232U (en) | A kind of mutual inductor end detecting device of the same name | |
| CN208350977U (en) | Mutual inductor secondary polarity device for fast detecting | |
| CN211014509U (en) | Low-voltage distribution network patrol instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180420 |
|
| RJ01 | Rejection of invention patent application after publication |