CN208596219U - Auxiliary device suitable for substation field calibrating mutual inductor - Google Patents
Auxiliary device suitable for substation field calibrating mutual inductor Download PDFInfo
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- CN208596219U CN208596219U CN201820951694.0U CN201820951694U CN208596219U CN 208596219 U CN208596219 U CN 208596219U CN 201820951694 U CN201820951694 U CN 201820951694U CN 208596219 U CN208596219 U CN 208596219U
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- auxiliary device
- mutual inductor
- connect
- substation field
- field calibrating
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Abstract
A kind of auxiliary device suitable for substation field calibrating mutual inductor, it includes pedestal, elevating mechanism, positioning mechanism and wiring mechanism, elevating mechanism is supported by pedestal, elevating mechanism lift adjustment height is driven by hydraulic mechanism, pass through step motor control positioning mechanism precise positioning, flexible gradually close to power transmission line by wiring mechanism, the terminals of binding clip clamping calibration equipment are connect with power transmission line.The utility model needs high altitude operation when overcoming former substation's measurement verification, artificial line, having a power failure influences the problem of operating normally, and has structure simple, and without the high altitude operation that has a power failure, calibrating efficiency is high, securely and reliably, is not easy the characteristics of getting an electric shock.
Description
Technical field
The utility model belongs to substation's Calibration Technology field, is related to a kind of suitable for substation field calibrating mutual inductor
Auxiliary device.
Background technique
Mutual inductor is as the electric energy conversion largely used in substation and metering device, precision and reliability and power train
Safe and reliable, the economical operation of system are closely related.Currently, the calibrating of current transformer metering end has manual operation, by that will examine
The power supply line of locking equipment is connect with transmission line of electricity, is automatically performed calibrating by equipment, is needed to have a power failure in operating process, influence equipment
It operates normally, there are security risks for high altitude operation, and calibrating efficiency is low, in addition, the connection of power supply line and power transmission line needs manually
It completes, there are the possibility of electric shock.
Summary of the invention
The technical problem to be solved by the utility model is to provide a kind of suitable for the auxiliary of substation field calibrating mutual inductor
Device is helped, structure is simple, and using pedestal support elevating mechanism lifting, positioning mechanism is accurately positioned, the flexible clamping inspection of wiring mechanism
The line end of locking equipment is connect with power transmission line, and without the high altitude operation that has a power failure, calibrating efficiency is high, securely and reliably, is not easy to get an electric shock.
It is a kind of suitable for substation field that in order to solve the above technical problems, the technical scheme adopted by the utility model is:
The auxiliary device of mutual inductor is examined and determine, it includes pedestal, elevating mechanism, positioning mechanism and wiring mechanism；The elevating mechanism with
Pedestal connection；The positioning mechanism is connect with elevating mechanism；The wiring mechanism is connect with positioning mechanism；The elevating mechanism position
Between pedestal and positioning mechanism.
The pedestal includes the supporting leg and wheel connecting with bottom plate；Described supporting leg one end is connect by shaft seat with bottom plate, branch
Leg rotates axle bed rotary folding, and the other end cooperates with vertical flexible backing plate.
The elevating mechanism is folding liftable, is driven by hydraulic mechanism.
The positioning mechanism includes matching with the vertical sliding of the sliding rail of horizontal slide cooperation sliding, with the sliding rail of vertical sliding
Close longitudinal slide of sliding；The vertical sliding and longitudinal slide bottom are equipped with screw rod and connect with stepper motor, wiring mechanism and
Longitudinal slide connection.
The wiring mechanism includes the fixing seat connecting with telescopic arm, the binding clip in fixing seat, telescopic arm and vertical
It is connected to the sliding rail of slide.
The fixing seat is the hollow box of front opening；The binding clip includes the folder up and down with rotary shaft coordination hinge
Pincers, rotary shaft are connected to motor with box body cooperation.
The front-end and back-end of the binding clip are respectively equipped with cam and spring, camshaft and the fixing seat cooperation of cam with it is upper
Lower clamp interior side contacts, spring are set among upper and lower tongs tail portion, are in compressive state.
The front end of the binding clip is equipped with asbestos conductive sponge.
The asbestos conductive sponge is connected with contact chip.
A kind of auxiliary device suitable for substation field calibrating mutual inductor, it includes pedestal, elevating mechanism, positioning mechanism
And wiring mechanism；Elevating mechanism is connect with pedestal；Positioning mechanism is connect with elevating mechanism；Wiring mechanism is connect with positioning mechanism；
Elevating mechanism is between pedestal and positioning mechanism.Structure is simple, supports elevating mechanism by pedestal, is driven by hydraulic mechanism
Elevating mechanism lift adjustment height is gradually leaned on by step motor control positioning mechanism precise positioning by the way that wiring mechanism is flexible
The terminals of nearly power transmission line, binding clip clamping calibration equipment are connect with power transmission line, and without the high altitude operation that has a power failure, calibrating efficiency is high,
Securely and reliably, it is not easy to get an electric shock.
In the preferred scheme, pedestal includes the supporting leg and wheel connecting with bottom plate；Supporting leg one end is by shaft seat and bottom plate
Connection, supporting leg rotate axle bed rotary folding, the other end and vertical flexible backing plate cooperation.Structure is simple, when calibrating, wheel rolling
Regulating base board is located at suitable operating position, and swing leg makes its expansion, and flexible backing plate rotary extension and ground supports, structure are steady
Fixed, intensity is high, easy to operate.
In the preferred scheme, elevating mechanism is folding liftable, is driven by hydraulic mechanism.Structure is simple, using mutual hinge
The support beam group connect is at folding telescopic structure, and hydraulic mechanism is at skewed flexible, the structure with adjacent two folding axis connection drivings
Stablize, lifting is high-efficient, and lifting is steady.
In the preferred scheme, positioning mechanism include with the sliding rail of horizontal slide cooperation sliding vertical sliding, with it is vertical
Longitudinal slide of the sliding rail cooperation sliding of slide；Vertical sliding and longitudinal slide bottom are equipped with screw rod and connect with stepper motor, connect
Line mechanism is connect with longitudinal slide.Structure is simple, is made of the horizontal slide for the connection that cooperates, vertical sliding and longitudinal slide
Positioning mechanism, vertical sliding along the connecting pin of the horizontal slidable adjustment calibration equipment of horizontal slide and the connection distance of power transmission line,
Longitudinal slide is settable along the connecting pin of vertical sliding slidable adjustment calibration equipment and the connection height of power transmission line, wiring mechanism
Monitoring device connect the process for monitoring entire wiring with control system, and positioning accuracy is high, and connection is accurate, connects without human intervention
It connects, will not get an electric shock.
In the preferred scheme, wiring mechanism includes the fixing seat connecting with telescopic arm, the binding clip in fixing seat,
Telescopic arm is connect with the sliding rail of longitudinal slide.Structure is simple, and when work, telescopic arm stretching, extension pushes fixing seat close to power transmission line,
The terminals of binding clip clamping calibration equipment are contacted with power transmission line, and telescopic arm is shunk after calibrating, and binding clip is detached to be connected with power transmission line
It connects, it is easy to operate, securely and reliably.
In the preferred scheme, fixing seat is the hollow box of front opening；Binding clip includes and rotary shaft coordination hinge
Upper and lower tongs, the cooperation of rotary shaft and box body is connected to motor.Structure is simple, and motor driven rotary shaft drives upper and lower tongs clamping
The terminals of calibration equipment, the clockwise driving jaws close of motor driven clamp terminals, and driving clamp is reversed to open release wiring
End.
In the preferred scheme, the front-end and back-end of binding clip are respectively equipped with cam and spring, the camshaft of cam and solid
Reservation cooperation and upper and lower tongs interior side contacts, spring are set among upper and lower tongs tail portion, are in compressive state.Structure is simple,
When off position, spring stretching, extension, binding clip opens, and cam support upper and lower tongs keep clamp to be in state to be held.
In the preferred scheme, the front end of binding clip is equipped with asbestos conductive sponge.Structure is simple, and asbestos conductive sponge is soft, tool
There is certain stretching force, is in the calibration equipment terminals of clamping in movable range centainly, when connecting with power transmission line
There is an activity surplus, when connection can automatically adjust.
In the preferred scheme, asbestos conductive sponge is connected with contact chip.Structure is simple, and the terminals of calibration equipment are clamped
When, when upper and lower contact chip is close to each other, incuded by control system, motor stops rotating, and binding clip clamps calibration equipment
Terminals.
A kind of auxiliary device suitable for substation field calibrating mutual inductor, it includes pedestal, elevating mechanism, positioning mechanism
And wiring mechanism, elevating mechanism is supported by pedestal, elevating mechanism lift adjustment height is driven by hydraulic mechanism, passes through stepping
Motor control positioning mechanism precise positioning, flexible gradually close to power transmission line by wiring mechanism, binding clip clamps calibration equipment
Terminals are connect with power transmission line.The utility model needs high altitude operation when overcoming former substation's measurement verification, artificial line stops
Film rings the problem of operating normally, and has structure simple, and without the high altitude operation that has a power failure, calibrating efficiency is high, securely and reliably, is not easy to touch
The feature of electricity.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples:
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the schematic front view of Fig. 1.
Fig. 3 is the schematic side view of Fig. 2.
Fig. 4 is the structural schematic diagram that the utility model positioning mechanism is connect with wiring mechanism.
Fig. 5 is the structural schematic diagram of the utility model wiring mechanism.
Fig. 6 is the schematic diagram of internal structure of Fig. 5.
Fig. 7 is the structural schematic diagram of the utility model clamp.
In figure: pedestal 1, bottom plate 11, supporting leg 12, wheel 13, elevating mechanism 2, hydraulic mechanism 21, positioning mechanism 3, level are sliding
Seat 31, vertical sliding 32, longitudinal slide 33, wiring mechanism 4, telescopic arm 41, fixing seat 42, binding clip 43, cam 44, spring
45, asbestos conductive sponge 46, contact chip 47.
Specific embodiment
In Fig. 1 ~ Fig. 7, a kind of auxiliary device suitable for substation field calibrating mutual inductor, it includes pedestal 1, lifting
Mechanism 2, positioning mechanism 3 and wiring mechanism 4；The elevating mechanism 2 is connect with pedestal 1；The positioning mechanism 3 and elevating mechanism
2 connections；The wiring mechanism 4 is connect with positioning mechanism 3；The elevating mechanism 2 is between pedestal 1 and positioning mechanism 3.Structure
Simply, elevating mechanism 2 is supported by pedestal 1,2 lift adjustment height of elevating mechanism is driven by hydraulic mechanism 21, passes through stepping
3 precise positioning of motor control positioning mechanism, flexible gradually close to power transmission line by wiring mechanism 4, the clamping calibrating of binding clip 43 is set
Standby terminals are connect with power transmission line, and without the high altitude operation that has a power failure, calibrating efficiency is high, securely and reliably, are not easy to get an electric shock.
In preferred scheme, the pedestal 1 includes the supporting leg 12 and wheel 13 connecting with bottom plate 11；Described 12 one end of supporting leg
It is connect by shaft seat with bottom plate 11, supporting leg 12 rotates axle bed rotary folding, and the other end cooperates with vertical flexible backing plate.Structure letter
Single, when calibrating, wheel 13 rolls regulating base board 11 and is located at suitable operating position, and swing leg 12 makes its expansion, and stretch backing plate
Rotary extension and ground supports, stable structure, intensity is high, easy to operate.
In preferred scheme, the elevating mechanism 2 is folding liftable, is driven by hydraulic mechanism 21.Structure is simple, using phase
Mutually hinged support beam group is stretched at skewed with two adjacent folding axis connection drivings at folding telescopic structure, hydraulic mechanism 21
Contracting, stable structure, lifting is high-efficient, and lifting is steady.
In preferred scheme, the positioning mechanism 3 include with the vertical sliding 32 of the sliding rail of horizontal slide 31 cooperation sliding,
With longitudinal slide 33 of the sliding rail cooperation sliding of vertical sliding 32；The vertical sliding 32 and longitudinal 33 bottom of slide are equipped with screw rod
It is connect with stepper motor, wiring mechanism 4 is connect with longitudinal slide 33.Structure is simple, by cooperate connection horizontal slide 31,
The positioning mechanism 3 that vertical sliding 32 and longitudinal slide 33 form, vertical sliding 32 are examined and determine along the horizontal slidable adjustment of horizontal slide 31
The connecting pin of equipment and the connection distance of power transmission line, longitudinal slide 33 is along the connecting pin of 32 slidable adjustment calibration equipment of vertical sliding
With the connection height of power transmission line, settable monitoring device connect the process for monitoring entire wiring with control system on wiring mechanism 4,
Positioning accuracy is high, and connection is accurate, connects, will not get an electric shock without human intervention.
In preferred scheme, the wiring mechanism 4 includes the fixing seat 42 connecting with telescopic arm 41, is located in fixing seat 42
Binding clip 43, telescopic arm 41 connect with the sliding rail of longitudinal slide 33.Structure is simple, and when work, the stretching, extension of telescopic arm 41 pushes solid
Reservation 42 is close to power transmission line, and the terminals that binding clip 43 clamps calibration equipment are contacted with power transmission line, and telescopic arm 41 is received after calibrating
Contracting, the disengaging of binding clip 43 is connect with power transmission line, easy to operate, securely and reliably.
In preferred scheme, the fixing seat 42 is the hollow box of front opening；The binding clip 43 includes and rotation
The upper and lower tongs of axis coordination hinge, rotary shaft are connected to motor with box body cooperation.Structure is simple, in the drive of motor driven rotary shaft
Lower clamp clamps the terminals of calibration equipment, and the clockwise driving jaws close of motor driven clamps terminals, reverses driving clamp
Acquittal puts terminals.
In preferred scheme, the front-end and back-end of the binding clip 43 are respectively equipped with cam 44 and spring 45, cam 44
Camshaft and the cooperation of fixing seat 42 and upper and lower tongs interior side contacts, spring 45 are set among upper and lower tongs tail portion, in compression
State.Structure is simple, and when off position, spring 45 stretches, and binding clip 43 opens, and cam 44 supports upper and lower tongs, retaining clip
Pincers are in state to be held.
In preferred scheme, the front end of the binding clip 43 is equipped with asbestos conductive sponge 46.Structure is simple, asbestos conductive sponge 46
Softness has certain stretching force, is in the calibration equipment terminals of clamping in movable range centainly, with power transmission line
There is an activity surplus when connection, when connection can automatically adjust.
In preferred scheme, the asbestos conductive sponge 46 is connected with contact chip 47.Structure is simple, the terminals of calibration equipment
When clamped, when upper and lower contact chip 47 is close to each other, incuded by control system, motor stops rotating, and binding clip 43 clamps
The terminals of calibration equipment.
Auxiliary device as described above suitable for substation field calibrating mutual inductor, when operating with, the support of pedestal 1 is risen
Descending mechanism 2, hydraulic mechanism 21 drive 2 lift adjustment height of elevating mechanism, and 3 precise positioning of step motor control positioning mechanism connects
Line mechanism 4 is flexible gradually close to power transmission line, and the terminals that binding clip 43 clamps calibration equipment are connect with power transmission line, high without having a power failure
Idle job, calibrating efficiency is high, securely and reliably, is not easy to get an electric shock.
When calibrating, wheel 13 rolls regulating base board 11 and is located at suitable operating position, and swing leg 12 makes its expansion, stretches
Backing plate rotary extension and ground supports, stable structure, intensity is high, easy to operate.
Using the support beam group being hinged at folding telescopic structure, hydraulic mechanism 21 is at skewed and adjacent two foldings
Axis connection driving is flexible, and stable structure, lifting is high-efficient, and lifting is steady.
The positioning mechanism 3 being made of the horizontal slide 31 for the connection that cooperates, vertical sliding 32 and longitudinal slide 33, vertically
Slide 32 is along the connecting pin of the horizontal slidable adjustment calibration equipment of horizontal slide 31 and the connection distance of power transmission line, longitudinal 33 edge of slide
The connecting pin of 32 slidable adjustment calibration equipment of vertical sliding and the connection height of power transmission line, settable monitoring is set on wiring mechanism 4
Standby that the process for monitoring entire wiring is connect with control system, positioning accuracy is high, and connection is accurate, connects without human intervention, will not
Electric shock.
When work, the stretching, extension of telescopic arm 41 pushes fixing seat 42 close to power transmission line, and binding clip 43 clamps connecing for calibration equipment
Line end is contacted with power transmission line, and telescopic arm 41 is shunk after calibrating, and the disengaging of binding clip 43 is connect with power transmission line, easy to operate, safely may be used
It leans on.
Motor driven rotary shaft drives the terminals of upper and lower tongs clamping calibration equipment, and the clockwise driving clamp of motor driven closes
Co-clip holds terminals, and driving clamp is reversed to open release terminals.
When off position, spring 45 stretches, and binding clip 43 opens, and cam 44 supports upper and lower tongs, and clamp is kept to be in
State to be held.
Asbestos conductive sponge 46 is soft, has certain stretching force, makes the calibration equipment terminals of clamping can in certain
In the range of activity, there is an activity surplus when connecting with power transmission line, when connection can automatically adjust.
When the terminals of calibration equipment are clamped, when upper and lower contact chip 47 is close to each other, incuded by control system, electricity
Machine stops rotating, and binding clip 43 clamps the terminals of calibration equipment.
The above embodiments are only the optimal technical scheme of the utility model, and are not construed as the limit for the utility model
System, the features in the embodiments and the embodiments of the present application in the absence of conflict, can mutual any combination.This is practical new
The protection scope of type should be with the technical solution of claim record, technical characteristic in the technical solution recorded including claim
Equivalents are protection scope.Equivalent replacement i.e. within this range is improved, also the protection scope of the utility model it
It is interior.
Claims (9)
1. a kind of auxiliary device suitable for substation field calibrating mutual inductor, it is characterized in that: it includes pedestal (1), elevator
Structure (2), positioning mechanism (3) and wiring mechanism (4)；The elevating mechanism (2) is connect with pedestal (1)；The positioning mechanism (3)
It is connect with elevating mechanism (2)；The wiring mechanism (4) connect with positioning mechanism (3)；The elevating mechanism (2) is located at pedestal (1)
Between positioning mechanism (3).
2. the auxiliary device according to claim 1 suitable for substation field calibrating mutual inductor, it is characterized in that: the bottom
Seat (1) includes the supporting leg (12) and wheel (13) connecting with bottom plate (11)；Described supporting leg (12) one end is by shaft seat and bottom plate
(11) it connects, supporting leg (12) rotates axle bed rotary folding, the other end and vertical flexible backing plate cooperation.
3. the auxiliary device according to claim 1 suitable for substation field calibrating mutual inductor, it is characterized in that: the liter
Descending mechanism (2) is folding liftable, is driven by hydraulic mechanism (21).
4. the auxiliary device according to claim 1 suitable for substation field calibrating mutual inductor, it is characterized in that: described fixed
Position mechanism (3) includes the sliding rail with the vertical sliding (32) of the sliding rail of horizontal slide (31) cooperation sliding and vertical sliding (32)
Cooperate longitudinal slide (33) of sliding；The vertical sliding (32) and longitudinal slide (33) bottom are equipped with screw rod and stepper motor connects
It connects, wiring mechanism (4) is connect with longitudinal slide (33).
5. the auxiliary device according to claim 1 or 4 suitable for substation field calibrating mutual inductor, it is characterized in that: institute
The binding clip (43) that wiring mechanism (4) includes the fixing seat (42) connecting with telescopic arm (41), is located in fixing seat (42) is stated, is stretched
Contracting arm (41) is connect with the sliding rail of longitudinal slide (33).
6. the auxiliary device according to claim 5 suitable for substation field calibrating mutual inductor, it is characterized in that: described solid
Reservation (42) is the hollow box of front opening；The binding clip (43) includes the upper and lower tongs with rotary shaft coordination hinge, rotation
Shaft is connected to motor with box body cooperation.
7. the auxiliary device according to claim 6 suitable for substation field calibrating mutual inductor, it is characterized in that: described connect
The front-end and back-end of wire clamp (43) are respectively equipped with cam (44) and spring (45), and camshaft and the fixing seat (42) of cam (44) are matched
It closes and is set among upper and lower tongs tail portion with upper and lower tongs interior side contacts, spring (45), be in compressive state.
8. the auxiliary device according to claim 7 suitable for substation field calibrating mutual inductor, it is characterized in that: described connect
The front end of wire clamp (43) is equipped with asbestos conductive sponge (46).
9. the auxiliary device according to claim 8 suitable for substation field calibrating mutual inductor, it is characterized in that: the stone
Cotton conductive sponge (46) is connected with contact chip (47).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820951694.0U CN208596219U (en) | 2018-06-20 | 2018-06-20 | Auxiliary device suitable for substation field calibrating mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820951694.0U CN208596219U (en) | 2018-06-20 | 2018-06-20 | Auxiliary device suitable for substation field calibrating mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208596219U true CN208596219U (en) | 2019-03-12 |
Family
ID=65601684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820951694.0U Expired - Fee Related CN208596219U (en) | 2018-06-20 | 2018-06-20 | Auxiliary device suitable for substation field calibrating mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208596219U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907877A (en) * | 2019-11-13 | 2020-03-24 | 宁波荣集锦科技有限公司 | Current transformer production detection device |
| CN111533058A (en) * | 2020-05-07 | 2020-08-14 | 广东博智林机器人有限公司 | Clamping platform and movable lifting equipment |
| CN112125242A (en) * | 2020-09-22 | 2020-12-25 | 国网河南省电力公司武陟县供电公司 | Anti-falling device for electric power tool |
| CN112578199A (en) * | 2020-11-18 | 2021-03-30 | 国网山西省电力公司晋城供电公司 | Integrated electrical testing device |
| CN112595875A (en) * | 2020-11-09 | 2021-04-02 | 大江控股集团电力科技有限公司 | Voltage acquisition and transmission system for high-voltage insulating part |
| CN115656578A (en) * | 2022-12-13 | 2023-01-31 | 石家庄科林电气设备有限公司 | Auxiliary device for measuring electrical performance of transformer and wiring control method |
-
2018
- 2018-06-20 CN CN201820951694.0U patent/CN208596219U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907877A (en) * | 2019-11-13 | 2020-03-24 | 宁波荣集锦科技有限公司 | Current transformer production detection device |
| CN110907877B (en) * | 2019-11-13 | 2021-10-22 | 常州金坛万杰电器有限公司 | Current transformer production detection device |
| CN111533058A (en) * | 2020-05-07 | 2020-08-14 | 广东博智林机器人有限公司 | Clamping platform and movable lifting equipment |
| CN111533058B (en) * | 2020-05-07 | 2021-11-19 | 广东博智林机器人有限公司 | Clamping platform and movable lifting equipment |
| CN112125242A (en) * | 2020-09-22 | 2020-12-25 | 国网河南省电力公司武陟县供电公司 | Anti-falling device for electric power tool |
| CN112595875A (en) * | 2020-11-09 | 2021-04-02 | 大江控股集团电力科技有限公司 | Voltage acquisition and transmission system for high-voltage insulating part |
| CN112595875B (en) * | 2020-11-09 | 2022-10-21 | 大江控股集团电力科技有限公司 | Voltage acquisition and transmission system for high-voltage insulating part |
| CN112578199A (en) * | 2020-11-18 | 2021-03-30 | 国网山西省电力公司晋城供电公司 | Integrated electrical testing device |
| CN115656578A (en) * | 2022-12-13 | 2023-01-31 | 石家庄科林电气设备有限公司 | Auxiliary device for measuring electrical performance of transformer and wiring control method |
| CN115656578B (en) * | 2022-12-13 | 2023-03-21 | 石家庄科林电气设备有限公司 | Auxiliary device for measuring electrical performance of transformer and wiring control method |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190312 Termination date: 20200620 |
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| CF01 | Termination of patent right due to non-payment of annual fee |