CN206671410U - A kind of high pressure power frequency self-monitoring electroscope - Google Patents
A kind of high pressure power frequency self-monitoring electroscope Download PDFInfo
- Publication number
- CN206671410U CN206671410U CN201720440479.XU CN201720440479U CN206671410U CN 206671410 U CN206671410 U CN 206671410U CN 201720440479 U CN201720440479 U CN 201720440479U CN 206671410 U CN206671410 U CN 206671410U
- Authority
- CN
- China
- Prior art keywords
- high voltage
- switch
- electroscope
- power frequency
- switch base
- 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.)
- Withdrawn - After Issue
Links
Abstract
It the utility model is related to high voltage supply system electrical verification operating technology field, especially a kind of high pressure power frequency self-monitoring electroscope, it includes insulating bar A, insulating bar B and holding rod, high voltage electroscope and electrical verification head is provided with insulating bar A, high voltage electroscope is equipped with earthing clamp；Power frequency high voltage generator is provided with insulating bar B, disconnecting switch A, high voltage rotary isolation switch and disconnecting switch B have been sequentially connected in series between the voltage signal output end of electrical verification head to power frequency high voltage generator；The high voltage rotary isolation switch is made up of switch base A and rotary sleeve and switch base B, and positioner is housed between switch base A and rotary sleeve or between rotary sleeve and switch base B；The utility model is simple in construction, ingenious in design, realize the integrated design to high voltage electroscope and power frequency high voltage generator, it is operationally simple and convenient, can safely and effectively carry out voltage matches, be advantageous to electrical verification operating personnel it is quick, it is accurate, safely carry out electrical verification operation.
Description
Technical field
High voltage supply system electrical verification operating technology field is the utility model is related to, especially a kind of high pressure power frequency self-monitoring is tested
Electrical equipment.
Background technology
Currently, high voltage electroscope is widely used in power system, is carried out to power system high-tension line
During repair and maintenance, in order to ensure the personal safety of operating personnel, it is necessary to carry out electrical verification operation to high-tension line and relevant device, this
When just need to use high voltage electroscope, it is to examine the whether powered specific purpose tool of high-tension line, is power worker's indispensability
One of security tool.
However, commercially there is miscellaneous high voltage electroscope, and use the higher high voltage electroscope of voltage class
It can not accurately test out whether low pressure has electricity, when being detected with the junior high voltage electroscope of voltage to high-tension line, electrical verification
The danger got an electric shock be present in personnel.In order to ensure electrical verification is safe and reliable, it is necessary to select what is be consistent with voltage of high-voltage line grade to be measured
High voltage electroscope.According to electric industry safety regulation for operations, the voltage to high voltage electroscope by power frequency high voltage generator is generally required
Grade is detected, and really to test the good of high voltage electroscope, is prevented because high voltage electroscope has faults itself, to testing staff
Erroneous judgement is caused, and prevents the personal safety to equipment and testing staff from bringing great threat.At least two are needed in detection
Individual testing staff carries out compounding practice, and one of testing staff holds power frequency high voltage generator, and by power frequency high voltage generator
Voltage signal output end alignment high voltage electroscope electrical verification head, another person holds the action bars of high voltage electroscope, and by height
Pressure electroscope lifts vacantly；After work to be prepared is carried out, start power frequency high voltage generator, when power frequency high voltage generator is sent just
When normal sound and light alarm indicates, then it is the high voltage electroscope for meeting voltage class to show high voltage electroscope, can be come into operation.
From the foregoing, it will be observed that existing high voltage electroscope is simple in construction, function is single, individually high-tension line can only be tested
It is electrically operated, and when carrying out electrical verification operation on the spot, power frequency high voltage generator need to be separately carried, and need more people to coordinate to that will put into
The voltage class of the high voltage electroscope used is verified with faulted condition, is operationally wasted time and energy, and seriously affects height
Press the efficiency of electrical verification operation.
The content of the invention
The purpose of this utility model seeks to solve existing high voltage electroscope on the spot to high-tension line progress electrical verification behaviour
Existing above mentioned problem when making, a kind of high pressure power frequency self-monitoring electroscope is provided for this.
Concrete scheme of the present utility model is：A kind of high pressure power frequency self-monitoring electroscope, including dock what is be integrated successively
Insulating bar A, insulating bar B and holding rod, are provided with high voltage electroscope and electrical verification head on insulating bar A, and high voltage electroscope is equipped with connecing
Ground clamp；It is characterized in that：Power frequency high voltage generator is provided with insulating bar B, in the voltage of electrical verification head to power frequency high voltage generator
Disconnecting switch A, high voltage rotary isolation switch and disconnecting switch B have been sequentially connected in series between signal output part；The high-pressure rotary every
Pass is left to be made up of switch base A and rotary sleeve and switch base B；Phase up and down is correspondingly offered on switch base A and switch base B
Scalloped recess A and scalloped recess B to arrangement, the groove depth of two scalloped recess are gradually reduced from left to right, disconnecting switch A and
Disconnecting switch B contact is correspondingly arranged in the bottom land on the right side of scalloped recess A and scalloped recess B；Rotary sleeve is set in insulating bar A
And/or on insulating bar B, eccentric pivot hole is offered on rotary sleeve, the both ends of eccentric pivot hole are relative with scalloped recess A, B respectively
Should, compression spring A is embedded with eccentric pivot hole, the both ends of compression spring A are respectively provided with contact, are connected between the two contacts by wire
Connect；Positioner is housed between switch base A and rotary sleeve or between rotary sleeve and switch base B.
Switch base A, B described in the utility model is in cylindrical structural, and switch base A is fixed on the bottom of high voltage electroscope
End, switch base B are fixed on the top of power frequency high voltage generator；The positioner is arranged between rotary sleeve and switch base B；
Several limit card slots circumferentially arranged are offered on the end face of rotary sleeve bottom, limit card slot is in sector structure, often
The gradually increase from left to right of the groove depth of individual limit card slot；Several corresponding limit card slots are offered on switch base B end face
The pin-and-hole of arrangement, the pilot hole being connected with each pin-and-hole is offered in switch base B side；Stage clip is fitted with the pin-and-hole
B and bearing pin；Operation ring is set with outside the switch base B, each bearing pin is consolidated by the connector through pilot hole and operation ring
Fixed connection.
High voltage electroscope has housing described in the utility model, charge port and ground connection mouth is provided with housing, and be equipped with
Button switch, loudspeaker, buzzer, LED and digital display screen, in housing be provided with signal access circuit, current rectifying and wave filtering circuit,
A/D change-over circuits, CPU and voice conversion module and power module A, wherein electrical verification head connection signal access circuit, signal connect
Enter circuit and pass sequentially through current rectifying and wave filtering circuit, A/D change-over circuits connection CPU, CPU connections buzzer, LED and digital display screen
And voice conversion module, voice conversion module connection loudspeaker；Power module A connection charge ports, and be each in high voltage electroscope
Individual module provides working power；Ground connection mouth is connected with earthing clamp.
Power frequency high voltage generator described in the utility model is built-in with by power module B, inverter circuit, frequency changer circuit and work(
The control circuit that energy circuit and booster circuit are connected in sequence, wherein power module B select chargeable storage, power supply mould
Block B connection illuminating lamps, the voltage signal output end of the voltage output end of booster circuit as power frequency high voltage generator, booster circuit
Connect disconnecting switch B.
The utility model is simple in construction, ingenious in design, realizes the one to high voltage electroscope and power frequency high voltage generator
Change design, when carrying out electrical verification operation to high-tension line and electrical equipment on the spot, only need to first pass through power frequency high voltage generator to height
Press electroscope to carry out self-test verification, electrical verification operation is then carried out by high voltage electroscope again, this is operationally simple and convenient, can
Safely and effectively carry out voltage matches, be advantageous to electrical verification operating personnel it is quick, it is accurate, safely carry out electrical verification operation.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is configuration schematic diagram of the present utility model；
Fig. 3 is the mounting structure schematic diagram of high voltage electroscope on insulating bar A in the utility model；
Fig. 4 is the structural representation of rotary sleeve in the utility model；
Fig. 5 is the mounting structure schematic diagram of power frequency high voltage generator on insulating bar B in the utility model；
Fig. 6 is the structural representation of the utility model mesohigh rotary isolation switch；
Fig. 7 is the structural representation of positioner in the utility model；
Fig. 8 is control structure block diagram of the present utility model.
In figure：1-insulating bar A, 2-insulating bar B, 3-holding rod, 4-electrical verification head, 5-earthing clamp, 6-high pressure are tested
Electrical equipment, 7-power frequency high voltage generator, 8-disconnecting switch A, 9-high voltage rotary isolation switch, 9a-switch base A, 9b-rotation
Axle sleeve, 9c-switch base B, 10-disconnecting switch B, 11-scalloped recess A, 12-scalloped recess B, 13-eccentric pivot hole, 14-
Compression spring A, 15a-contact, 15b-contact, 16a-contact, 16b-contact, 17-wire, 18-limit card slot, 19-pin-and-hole,
20-pilot hole, 21-stage clip B, 22-bearing pin, 23-operation ring, 24-housing, 25-charge port, 26-ground connection mouth, 27-
Button switch, 28-loudspeaker, 29-buzzer, 30-LED, 31-digital display screen, 32-signal access circuit, 33-whole
Flow filter circuit, 34-A/D change-over circuits, 35-CPU, 36-voice conversion module, 37-power module A, 38-power supply mould
Block B, 39-inverter circuit, 40-frequency changer circuit, 41-functional circuit, 42-booster circuit, 43-illuminating lamp, 44-human body electricity
Hold.
Embodiment
Referring to Fig. 1-6, a kind of high pressure power frequency self-monitoring electroscope, including the insulating bar A1 being integrated, insulation are docked successively
Bar B2 and holding rod 3, high voltage electroscope 6 and electrical verification first 4 are provided with insulating bar A1, high voltage electroscope is equipped with earthing clamp 5；
Power frequency high voltage generator 7 is provided with insulating bar B2, electrical verification first 4 to power frequency high voltage generator 7 voltage signal output end it
Between be sequentially connected in series disconnecting switch A8, high voltage rotary isolation switch 9 and disconnecting switch B10；The high voltage rotary isolation switch 9 by
Switch base A (9a) and rotary sleeve 9b and switch base B (9c) compositions；Correspondingly opened on switch base A (9a) and switch base B (9c)
Provided with scalloped recess A11 and scalloped recess B12 positioned opposite up and down, the groove depth of two scalloped recess gradually subtracts from left to right
Small, disconnecting switch A8 contact 15a is arranged at the bottom land on the right side of scalloped recess A11, and disconnecting switch B10 contact 16a is arranged at
Bottom land on the right side of scalloped recess B12；Rotary sleeve 9b is set on insulating bar A1 or insulating bar B2, or rotary sleeve 9b suits
In insulating bar A1 and insulating bar B2 joint portion, referring to Fig. 2；Eccentric pivot hole 13, eccentric pivot hole are offered on rotary sleeve 9b
13 both ends are corresponding with scalloped recess A11, scalloped recess B12 respectively, and compression spring A 14, stage clip are embedded with eccentric pivot hole 13
A14 upper and lower ends are correspondingly equipped with contact 15b and contact 16b, are connected between the two contacts by wire 17；In switch base
Positioner is housed between A (9a) and rotary sleeve 9b or between rotary sleeve 9b and switch base B (9c).
Referring to Fig. 1, Fig. 2, Fig. 7, switch base A described in the present embodiment (9a) and switch B (9c) are in cylindrical structural, are opened
The bottom that seat A (9a) is fixed on high voltage electroscope 6 is closed, switch base B (9c) is fixed on the top of power frequency high voltage generator 7；It is described
Positioner is arranged between rotary sleeve 9b and switch base B (9c)；Three are offered on the end face of rotary sleeve 9b bottoms
The limit card slot 18 circumferentially arranged, limit card slot 18 are in sector structure, the groove depth of each limit card slot 18 from left to right by
It is cumulative big；The pin-and-hole 19 that three corresponding limit card slots 18 are arranged is offered on switch base B (9c) end face, in switch base B
The side of (9c) offers the pilot hole 20 being connected with each pin-and-hole 19, and from Fig. 5, Fig. 7, pin-and-hole 19 and pilot hole 20 are equal
Axially arrange；Stage clip B21 and bearing pin 22 are fitted with the pin-and-hole 20；Operation ring is set with outside the switch base B (9c)
23, each bearing pin 22 is fixedly connected by the connector through pilot hole 20 with operation ring 23.
High voltage electroscope 6 described in the present embodiment has housing 24, and charge port 25 and ground connection mouth 26 are provided with housing 24,
And button switch 27, loudspeaker 28, buzzer 29, LED 30 and digital display screen 31 are housed, signal is provided with housing 24 and is accessed
Circuit 32, current rectifying and wave filtering circuit 33, A/D change-over circuits 34, CPU35 and voice conversion module 36 and power module A37, referring to
Fig. 8.
High voltage electroscope 6 when carrying out electrical verification operation, directly with high-tension line or electrical equipment to be detected enter by electrical verification first 4
The voltage signal of detection is transmitted to signal and accesses circuit 32 by row overlap joint, electrical verification first 4, is accessed in signal in circuit 32 and is provided with current limliting
Resistance, for high-voltage AC signal to be converted into weak AC signal；Current rectifying and wave filtering circuit 33 is used to be converted to weak AC signal
D. c. voltage signal, and filter out the interference signal in d. c. voltage signal；A/D change-over circuits 34 are used to turn d. c. voltage signal
CPU35 is given in transmission after being changed to data signal, and CPU35 is used to data signal being sent to digital display screen 31 and voice modulus of conversion
Block 36, and by by data signal compared with setting magnitude of voltage (0.5KV) in CPU35, to judge that signal accesses circuit 32
The voltage detected is operating voltage or induced voltage, i.e., when detecting voltage >=0.5KV, then the voltage for showing to detect is
Operating voltage, now CPU35 controls buzzer 29 are alarmed, and LED 30 flashes, and digital display screen 31 shows the voltage detected
Value, and the data signal of voltage is converted to voice signal by voice conversion module 36, and reported by loudspeaker 28 to tester
Member；When detecting voltage ＜ 0.5KV, then the voltage for showing to detect is induced voltage, and now CPU35 simply controls digital-scroll technique
The magnitude of voltage that detects of the display of screen 31, and detection voltage is reported by voice conversion module 36 and loudspeaker 28, and and without report
Alert instruction.
Power frequency high voltage generator 7 described in the present embodiment is built-in with by power module B38, inverter circuit 39, frequency changer circuit
40 and the control circuit that is connected in sequence of functional circuit 41 and booster circuit 42, selected referring to Fig. 8, wherein power module B38
With chargeable storage, power module B38 connections illuminating lamp 43, the voltage output end of booster circuit 42 occurs as power frequency high voltage
The voltage signal output end of device, booster circuit 42 connect disconnecting switch B10.It follows that power frequency high voltage generator 7 is using small
Type low-voltage dc power supply after inversion, increasing frequency and boosting, use by recoil simulator of the output with certain energy, the signal that it sends
In startup high voltage electroscope 6.When in use, power frequency high voltage generator 7 utilizes the form of human body direct-to-ground capacitance passage, i.e., in Fig. 8
In the body capacitance 44 that is connected with power module B38, send-receive-release of analog signal is carried out to high voltage electroscope 6, from
And complete the whole closed-loop path that capacitance current passes through space electric field.
Operating process of the present utility model is as follows：
, it is necessary to carry out self-test verification to high voltage electroscope 6 before electrical verification is carried out to high-tension line or high voltage electric equipment：This
When by electrical verification personnel first close disconnecting switch A8, disconnecting switch B10 and high voltage rotary isolation switch 9 successively, then hand holds power frequency
High pressure generator 7, start power frequency high voltage generator 7 to realize the verification to high voltage electroscope 6.Keep apart in closed high rotation
When closing 9, need to only turn clockwise rotary sleeve 9b, from Fig. 6 and Fig. 7, with the dextrorotation to rotary sleeve 9b
Turn, the compression spring A 14 being embedded in eccentric pivot hole 13 is changed into compressive state by natural elongation state, until the upper end of compression spring A 14 is touched
Head 15b is corresponding to be in contact with disconnecting switch A8 contact 15a, and the contact 16b of the lower end of compression spring A 14 is corresponding with disconnecting switch B10's
Contact 16a is in contact, so as to realize to the closing operation of high voltage rotary isolation switch 9；At the same time, for positioner,
Stage clip B21 in pin-and-hole 20 is changed into nature elongation state by compressive state, and now bearing pin 22 is under stage clip B21 elastic force effect
The right-hand member of limit card slot 18 is stretched to, thus positioner is realized to the positioning between rotary sleeve 9b and switch base B (9c).
After high voltage electroscope 6 after verification has no problem, then realize to high voltage rotary isolation switch 9, keep apart successively
A8 and disconnecting switch B10 separating brake processing is closed, electrical verification operation is carried out will pass through high voltage electroscope 6.Wherein to high-pressure rotary
During 9 separating brake of disconnecting switch, dynamic pull downward on the offensive operates ring 23, is determined with releasing between rotary sleeve 9b and switch base B (9c)
Position, then rotate counterclockwise rotary sleeve 9b so that the contact of the upper and lower ends of compression spring A 14 corresponds to and disconnecting switch A8, disconnecting switch
B10 contact 15a separation, so as to realize the sub-switching operation of high voltage rotary isolation switch 9.
Claims (4)
1. a kind of high pressure power frequency self-monitoring electroscope, including the insulating bar A being integrated, insulating bar B and holding rod are docked successively,
Insulating bar A is provided with high voltage electroscope and electrical verification head, and high voltage electroscope is equipped with earthing clamp；It is characterized in that：On insulating bar B
Provided with power frequency high voltage generator, isolation has been sequentially connected in series between the voltage signal output end of electrical verification head to power frequency high voltage generator
Switch A, high voltage rotary isolation switch and disconnecting switch B；The high voltage rotary isolation switch by switch base A and rotary sleeve and
Switch base B is formed；Scalloped recess A and scalloped recess B positioned opposite up and down are correspondingly offered on switch base A and switch base B,
The groove depth of two scalloped recess is gradually reduced from left to right, and disconnecting switch A and disconnecting switch B contact are correspondingly arranged in sector
Bottom land on the right side of groove A and scalloped recess B；Rotary sleeve is set on insulating bar A and/or insulating bar B, is opened on rotary sleeve
Provided with eccentric pivot hole, the both ends of eccentric pivot hole are corresponding with scalloped recess A, B respectively, and compression spring A is embedded with eccentric pivot hole, pressure
Spring A both ends are respectively provided with contact, are connected between the two contacts by wire；Between switch base A and rotary sleeve or
Positioner is housed between rotary sleeve and switch base B.
2. a kind of high pressure power frequency self-monitoring electroscope according to claim 1, it is characterized in that：Described switch base A, B are in
Cylindrical structural, switch base A are fixed on the bottom of high voltage electroscope, and switch base B is fixed on the top of power frequency high voltage generator；Institute
Positioner is stated to be arranged between rotary sleeve and switch base B；Several are offered on the end face of rotary sleeve bottom along circle
The limit card slot of week arrangement, limit card slot are in sector structure, and the groove depth of each limit card slot gradually increases from left to right；Opening
The pin-and-hole that several corresponding limit card slot arrangements are offered on seat B end face is closed, is offered in switch base B side with each selling
The pilot hole that hole is connected；Stage clip B and bearing pin are fitted with the pin-and-hole；Operation ring, Mei Gexiao are set with outside the switch base B
Axle is fixedly connected by the connector through pilot hole with operation ring.
3. a kind of high pressure power frequency self-monitoring electroscope according to claim 1 or 2, it is characterized in that：The high voltage electroscope
With housing, charge port and ground connection mouth are provided with housing, and show equipped with button switch, loudspeaker, buzzer, LED and number
Display screen, be provided with housing signal access circuit, current rectifying and wave filtering circuit, A/D change-over circuits, CPU and voice conversion module and
Power module A, wherein electrical verification head connection signal access circuit, signal access circuit pass sequentially through current rectifying and wave filtering circuit, A/D conversions
Circuit connects CPU, CPU connections buzzer, LED and digital display screen and voice conversion module, voice conversion module connection
Loudspeaker；Power module A connection charge ports, and provide working power for modules in high voltage electroscope；It is grounded mouth and ground wire
Folder is connected.
4. a kind of high pressure power frequency self-monitoring electroscope according to claim 1 or 2, it is characterized in that：The power frequency high voltage hair
Raw device is built-in with the control being connected in sequence by power module B, inverter circuit, frequency changer circuit and functional circuit and booster circuit
Circuit processed, wherein power module B select chargeable storage, power module B connection illuminating lamps, the voltage output end of booster circuit
As the voltage signal output end of power frequency high voltage generator, booster circuit connection disconnecting switch B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720440479.XU CN206671410U (en) | 2017-04-25 | 2017-04-25 | A kind of high pressure power frequency self-monitoring electroscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720440479.XU CN206671410U (en) | 2017-04-25 | 2017-04-25 | A kind of high pressure power frequency self-monitoring electroscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206671410U true CN206671410U (en) | 2017-11-24 |
Family
ID=60370129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720440479.XU Withdrawn - After Issue CN206671410U (en) | 2017-04-25 | 2017-04-25 | A kind of high pressure power frequency self-monitoring electroscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206671410U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064606A (en) * | 2017-04-25 | 2017-08-18 | 国家电网公司 | A kind of high pressure power frequency self-monitoring electroscope |
| CN108872691A (en) * | 2018-07-13 | 2018-11-23 | 刘洪年 | The multi-functional operation head of included electroscope function |
-
2017
- 2017-04-25 CN CN201720440479.XU patent/CN206671410U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064606A (en) * | 2017-04-25 | 2017-08-18 | 国家电网公司 | A kind of high pressure power frequency self-monitoring electroscope |
| CN108872691A (en) * | 2018-07-13 | 2018-11-23 | 刘洪年 | The multi-functional operation head of included electroscope function |
| CN108872691B (en) * | 2018-07-13 | 2020-11-20 | 刘洪年 | Multifunctional operating rod head with electricity testing function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104332946B (en) | Ground fault protecting circuit and ground fault breaker | |
| CN105866720B (en) | A kind of DC system fault simulator | |
| CN204666788U (en) | A kind of relay checking seat | |
| CN107064606A (en) | A kind of high pressure power frequency self-monitoring electroscope | |
| CN202736328U (en) | Metering program control analog device | |
| CN206671410U (en) | A kind of high pressure power frequency self-monitoring electroscope | |
| CN103887765A (en) | Electric leakage detection protection circuit with discrete component timing self-detection function | |
| CN208937683U (en) | A kind of photovoltaic junction box diode characteristic detection device | |
| CN103336168A (en) | Full-loop alternating-current self-test high-voltage electroscope | |
| CN203838264U (en) | Subway vehicle battery charger test bench | |
| CN208985418U (en) | Dress table connects electric Simulated training device | |
| CN207096364U (en) | A kind of Experiments of Electricity short circuit detection means | |
| CN206940144U (en) | The elevator emergency for inductively detecting door lock break-make using detection declutches supply unit | |
| CN203812022U (en) | Analog control panel for railway signal interlock test | |
| CN202815146U (en) | Polarity detector for mutual inductor | |
| CN106353624A (en) | Power distribution automation power-outage-free debugging equipment and working method thereof | |
| CN203630312U (en) | Direct current motor armature fault detection device | |
| CN206990742U (en) | The test machine and its earth detector of semiconductor devices | |
| CN102226773B (en) | Test bench for X-ray detection apparatuses | |
| CN205941823U (en) | Specified surplus switch -on breaking capacity testing arrangement | |
| CN209132357U (en) | A kind of overcurrent protector Auto-Test System and device | |
| CN108931699A (en) | DC break down voltage test device | |
| CN105182963B (en) | A kind of test device of fire resisting shutter door controller | |
| CN206710526U (en) | A kind of short-circuit protection diagnostic equipment | |
| CN215180579U (en) | BXZ direct current protector comprehensive test bench |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171124 Effective date of abandoning: 20230721 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20171124 Effective date of abandoning: 20230721 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |