CN208257617U - A kind of generator casing electric leakage monitoring and protective device - Google Patents
A kind of generator casing electric leakage monitoring and protective device Download PDFInfo
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- CN208257617U CN208257617U CN201820777519.4U CN201820777519U CN208257617U CN 208257617 U CN208257617 U CN 208257617U CN 201820777519 U CN201820777519 U CN 201820777519U CN 208257617 U CN208257617 U CN 208257617U
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- generator
- insulation
- generator casing
- electric leakage
- stator winding
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Abstract
The utility model discloses a kind of generator casing electric leakage monitoring and protective devices, including earth detector, insulation measurement mechanism, insulation resistance compares mechanism, control mechanism, warning device and remove moisture mechanism, earth detector is connect with motor housing, mechanism compared with insulation resistance of insulation measurement mechanism connects, insulation measurement mechanism measures the insulating resistance value between each winding of generator and generator casing, control mechanism respectively with earth detector, insulation measurement mechanism, insulation resistance compares mechanism, alarm mechanism, remove moisture mechanism connection.The utility model is capable of the drain conditions of real-time detection generator casing, and when leaking electricity generation, automatic starting removes moisture mechanism and removes moisture, it generates heat and is dried with short circuit current is generated in generator unit stator winding using excitation field, the insulating resistance value between each winding of generator and generator casing is improved, the insulation safety of generator casing is well ensured.
Description
Technical field
The utility model relates to motor device fields, and in particular to a kind of generator casing electric leakage monitoring and protective device.
Background technique
Generator inevitably will appear in operation has the case where electric leakage, the generator after electric leakage on generator casing
It will lead to the reduction of motor ability to work, and work as people and touch the risk that generator also has electric shock, influence work safety, it is unfavorable
In production.And generator casing leaks electricity, it is most common the reason is that generator makes moist.What electric appliance had a dampness in use can
Energy, the especially electric appliance used in wet environment.Such as splashing rainwater or by condensation generate moisture can invade power generation
Machine, especially during generator is in intermitten service.If these water or moisture cannot be discharged in time, generator just makes moist
?.Humidity is a lethal factor of rotating electric machine damage.For safety, it before generator operation, preferably first checks
The insulation of generator reuses after should drying if there is dampness.
Utility model content
Purpose of the utility model is to solve one of above problems.
To achieve the goals above, the utility model provides a kind of generator casing electric leakage monitoring and protective device, packet
Earth detector, insulation measurement mechanism, insulation resistance is included to compare mechanism, control mechanism, warning device and remove moisture machine
Structure, the earth detector are connect with generator casing, insulation measurement mechanism machine compared with the insulation resistance
Structure connection, the insulation measurement mechanism measures the insulating resistance value between each winding of generator and generator casing, described exhausted
Edge resistance compares mechanism and connect with the control mechanism, the control mechanism respectively with the earth detector, insulation resistance
Measuring mechanism, insulation resistance compare mechanism, warning device, the mechanism that removes moisture and connect.
Further, the mechanism that removes moisture includes relay, temperature-detecting device, the relay and generator unit stator around
The outlet connection of group.
Further, the temperature-detecting device respectively with the exit site of generator unit stator winding and stator winding end
Portion's connection, the exit site of the temperature-detecting device detection generator unit stator winding and the temperature of stator winding end.
Further, the generator casing is equipped with peep hole, and the peep hole is equipped with glass cover to be opened/closed, institute
Glass cover is stated to completely enclose the peep hole, it is described to remove moisture the control that mechanism further includes the glass cover opening and closing of generator peep hole
Switch.
Further, the control mechanism is connect with the relay, temperature-detecting device, control switch respectively.
Further, the warning device includes flashing lamp and buzzer.
A kind of generator casing electric leakage monitoring of the utility model compared with prior art, has following excellent with protective device
Point and effect: the utility model can real-time detection generator casing drain conditions, when generator casing electric leakage when, control mechanism
Automatic action alarm and device is removed moisture, is generated heat using excitation field with short circuit current is generated in generator unit stator winding
It is dried, it is horizontal to improve generator stator insulator；During removing moisture, insulation measurement mechanism, insulation resistance compare machine
Structure real-time detection compares insulating resistance value and preset insulation resistance threshold value between each winding of generator and generator casing
Difference analyzed by controller and obtained the insulation status of generator each winding and generator casing according to comparison result, until
Reach specification, control mechanism control removes moisture mechanism stopping and removes moisture operation, well ensures the insulation safety of generator casing.
Detailed description of the invention
Fig. 1 is the utility model generator casing electric leakage monitoring and the mechanism connection schematic diagram in protective device；
Fig. 2 is the generator structural schematic diagram of the utility model embodiment.
Description of symbols:
1- generator casing；2- stator winding；3- stator；4- stator winding end；5- rotor；6- earth detector；
7- warning device；8- insulation measurement mechanism；9- insulation resistance compares mechanism；10- control mechanism；11- removes moisture mechanism.
Specific embodiment
The exemplary embodiments for embodying the utility model features and advantages will describe in detail in the following description.It should be understood that
It is that the utility model there can be various variations in different embodiments, does not all depart from the scope of the utility model, and
The descriptions and illustrations are essentially for illustration purposes, rather than to limit the utility model.
A kind of generator casing electric leakage monitoring and protective device as shown in Figure 1, including a kind of electric leakage monitoring of generator casing
With protective device, including earth detector 6, insulation measurement mechanism 8, insulation resistance compare mechanism 9, control mechanism 10,
Warning device 7 and mechanism 11 is removed moisture, the earth detector 6 is connect with generator casing 1, the insulation measurement machine
The mechanism 9 compared with the insulation resistance of structure 8 connects, and the insulation measurement mechanism 8 measures each winding of generator and generator
Insulating resistance value between shell 1, the insulation resistance compare mechanism 9 and connect with the control mechanism 10, the control mechanism 10
Respectively compared with the earth detector 6, insulation measurement mechanism 8, insulation resistance mechanism 9, warning device 7, remove moisture machine
Structure 11 connects.
The earth detector 6 has for detecting the generator casing 1 with the presence or absence of drain conditions to leakage
The function of current detecting and judgement, the earth detector 6 are connect with the control mechanism 10, when detecting, determine power generation
When the leakage current of machine shell 1 is greater than predetermined current value, leakage-current alarm signal is issued, the control mechanism 10 is reflected to.Wherein, institute
Stating predetermined current value can be set to 0.8A.The control mechanism 10 starts warning device after receiving the leakage-current alarm signal
Alarm, it is preferable that alarm continues bright light alarm；Meanwhile the starting of control mechanism 10 removes moisture mechanism 11, to generator unit stator
Winding 2 carries out removing moisture processing.
The mechanism 11 that removes moisture includes relay, temperature-detecting device, and the relay goes out with generator unit stator winding 2
Mouth connection.
The temperature-detecting device connects with the exit site of generator unit stator winding 2 and stator winding end 4 respectively
It connects, the exit site of the temperature-detecting device detection generator unit stator winding 2 and the temperature of stator winding end 4.Power generation
The outlet of machine stator winding 2 is the leading-out terminal of 2 coil of stator winding.
The generator casing 1 is equipped with peep hole, and the peep hole is equipped with glass cover to be opened/closed, the glass cover
The peep hole is completely enclosed, it is described to remove moisture the control switch that mechanism 11 further includes the glass cover opening and closing of generator peep hole.
When dry, the glass of generator peep hole is opened, shut to control switch described in 10 timing controlled of control mechanism
Lid, so that moist gas to be discharged.It can be in the drying process, open primary, each opening 5-10 minutes per hour.
The control mechanism 10 is connect with the relay, temperature-detecting device, control switch respectively.The relay can
So that the outlet of generator unit stator winding 2 is shorted or disconnects；The temperature of the temperature-detecting device detection stator winding 2, including
The exit of stator winding 2 and the temperature of stator winding end 4.
The insulation measurement mechanism 8, for measuring the insulation resistance between each winding of generator and generator casing 1
Value.The insulation measurement mechanism 8 includes insulation measurement instrument.
The insulation resistance compares mechanism 9, connect with the insulation measurement mechanism 8, the insulation resistance compares machine
Structure 9 is carried out for preset insulation resistance threshold value and the insulation measurement mechanism 8 measurement to be obtained insulating resistance value
Compare, whether the insulating resistance value is greater than or equal to preset insulation resistance threshold value.
The insulation resistance compares mechanism 9 and the result obtained more afterwards is sent to the control mechanism 10, the control
Mechanism analyzes according to the insulating resistance value and comparison result and judges situation of making moist or remove moisture.Such as: generator under room temperature,
The insulation resistance of controller switching equipment and distribution line is not lower than 0.5M Ω, and (for running equipment and route, insulation resistance is not
1M Ω/kV should be lower than).The insulation resistance of low-voltage electrical apparatus and its connecting cable and secondary circuit is generally not lower than 1M Ω；Than
Moister environment is not lower than 0.5M Ω；The insulation resistance of the small bus of secondary circuit is not lower than 10M Ω.
The warning device 7 includes flashing lamp and buzzer.There are two types of alarm modes for the warning device: 1) when described
When earth detector 6 detects the generator casing 1 electric leakage, the warning device 7 continues bright light alarm；2) generator is
Non- stator winding dampness failure, it is flashing light and buzzing alarm that control mechanism 10, which starts the warning device alarm,.
Using the described generator casing electric leakage monitoring and protective device, achievable automatic generator body leakage monitoring with
The operation of protective device.
In another embodiment, the application method of the electric leakage of above-mentioned generator casing monitoring and protective device, including it is following
Step:
When generator casing 1 leaks electricity, the earth detector 6 detects leakage current, and electric leakage signal is sent to institute
Control mechanism 10 is stated, the control mechanism 10 starts the warning device 7 and alarms, while the starting of the control mechanism 10 removes moisture machine
Structure 11 carries out generator unit stator winding 2 to remove moisture processing.
The mechanism 11 that removes moisture includes relay, temperature-detecting device, and the relay goes out with motor stator winding 2
Mouth connection, the temperature-detecting device are connect with the exit site of generator unit stator winding 2 and stator winding end 4 respectively；
It is described remove moisture processing include: when the control mechanism 10 starting remove moisture mechanism 11 when, the relay by the stator of generator around
2 terminal short-circuits of group, the control mechanism 10 start generator free-runing operation under rated speed, then the control mechanism
10 gradually adjust the size of exciting current, and 2 short circuit current of generator unit stator winding is made to rise to the rated current of 50%-95%,
Preferably, 2 short circuit current of generator unit stator winding rises to the rated current of 80%-90%；The control mechanism 10 also needs
The size that the result control exciting current of 4 temperature of stator winding end is detected according to the temperature detector, so that stator winding
4 temperature of end rises above 10 DEG C per hour, it is preferable that is no more than 6 DEG C, and the exit of the stator winding 2 and institute
Stator winding end temperature is stated no more than 85 DEG C；Period, the insulation measurement mechanism 8 continue to monitor each winding of generator with
Insulating resistance value between generator casing 1, and measured value is fed back into the insulation resistance and compares mechanism 9, the insulation resistance
Compare mechanism 9 and comparison result is sent to the control mechanism 10, the control mechanism 10 is according to the measured value and compares knot
The movement of mechanism is removed moisture described in fruit control.
It is measured when the control mechanism 10 obtains the insulation measurement mechanism 8 according to the measured value and comparison result
Insulating resistance value between each winding of generator and generator casing 1 is greater than or equal to preset insulation resistance threshold value, and institute
State continuous 3-6 hours of the floating of measured value in a certain range, it is preferable that continuous 3-6 hours of the measured value floats in 0.2%
Dynamic, the control mechanism 10, which controls the mechanism 11 that removes moisture, to be stopped removing moisture operation, and the relay disconnects the stator winding 2
Short circuit current, generator restPoses.
When it is described remove moisture mechanism starting work 8 it is small when after, the mechanism 9 that the insulation resistance compares compares to obtain the insulated electro
The insulating resistance value that resistance measuring mechanism 8 measures between each winding of generator and generator casing 1, which is not greater than or equal to also, to be preset
Insulation resistance threshold value when；Or the insulation resistance compares mechanism 9 and compares to obtain the survey of insulation measurement mechanism 8
It measures the insulating resistance value between each winding of generator and generator casing 1 and is greater than or equal to preset insulation resistance threshold value, but
When being that the earth detector 6 still detects the generator casing 1 electric leakage, generator is the dampness event of non-stator winding
Barrier, control mechanism 10 start another alarm mode of the warning device, warning device flashing light and buzzing.
In temperature-detecting device, measuring preferably is embedded temperature detector, embedded temperature detector used in 2 temperature of stator winding
It can be resistance-type or thermojunction type, what it is for generator thermometric is preferably resistance-type.The thermometric of resistance-type thermometry meter
Element is generally embedded in the middle part of stator bar between upper and lower layer, that is, is placed in layer insulation filler strip in a special groove, and
It seals, its end is connected in the terminal box of generator side with two conducting wires, then lead to the measuring device of thermometry meter, utilizes survey
Warm element is influenced by temperature and causes the variation of resistance value in embedded point, to measure the embedded point i.e. temperature of stator winding 2.
The earth detector 6 persistently detects whether the generator casing 1 has leakage current, when having detected leakage current
When, electric leakage signal is sent to the control mechanism 10, the control mechanism starts the warning device 7 and alarms, starts simultaneously
Mechanism 11 is removed moisture to remove moisture；When carrying out removing moisture processing, the terminal short-circuit of stator winding 2 is adjusted excitation by the mechanism 11 that removes moisture
The size of electric current is generated heat and is dried with short circuit current is generated in generator unit stator winding 2 using excitation field, removes moisture the phase
Between, the insulation measurement mechanism 8 and insulation resistance compare mechanism 9 and continue working, and test and analyze the insulation resistance
Whether the insulating resistance value between each winding of generator and generator casing 1 that measuring mechanism 8 measures, which is greater than or equal to, presets
Insulation resistance threshold value, until complete remove moisture operation.
It should be noted that the application method in the utility model embodiment can be used to implement outside above-mentioned motor
Shell electric leakage monitoring can refer in above-described embodiment with whole technical solutions in the embodiment of protective device, specific implementation process
Associated description, details are not described herein again.
A kind of generator casing electric leakage monitoring of the utility model can complete automatic generator body leakage with protective device
Monitoring and the operation of protective device, the utility model can real-time detection generator casing drain conditions, when generator casing leaks
When electric, control mechanism automatic action alarm and device is removed moisture, using generating in excitation field and generator unit stator winding
Short circuit current and generate heat and be dried, it is horizontal to improve generator stator insulator；During removing moisture, insulation measurement mechanism,
The mechanism real-time detection that insulation resistance compares compares insulating resistance value between each winding of generator and generator casing and presets
The difference of insulation resistance threshold value analyzed and obtained outside each winding of generator and generator by control mechanism according to comparison result
The insulation status of shell, until reaching specification, control mechanism control removes moisture mechanism stopping and removes moisture operation, well ensures generator
The insulation safety of shell.
Above embodiments are only to illustrate the technical solution of the application, rather than its limitations；Although with reference to the foregoing embodiments
The application is described in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the protection scope for various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution.
Claims (6)
1. a kind of generator casing electric leakage monitoring and protective device, it is characterised in that: including earth detector (6), insulated electro
Resistance measuring mechanism (8), insulation resistance compare mechanism (9), control mechanism (10), warning device (7) and remove moisture mechanism (11), institute
It states earth detector (6) to connect with generator casing (1), the insulation measurement mechanism (8) and the insulation resistance ratio
It is connected compared with mechanism (9), the insulation measurement mechanism (8) measures the insulation between each winding of generator and generator casing (1)
Resistance value, the control mechanism (10) respectively with the earth detector (6), insulation measurement mechanism (8), insulation resistance
Compare mechanism (9), warning device (7), remove moisture mechanism (11) connection.
2. a kind of generator casing electric leakage monitoring according to claim 1 and protective device, it is characterised in that: described to remove moisture
Mechanism (11) includes relay, temperature-detecting device, and the relay is connect with the outlet of generator unit stator winding (2).
3. a kind of generator casing electric leakage monitoring according to claim 2 and protective device, it is characterised in that: the temperature
Detection device is connect with the exit site of generator unit stator winding (2) and stator winding end (4) respectively, the temperature detection
Device detects the exit site of generator unit stator winding (2) and the temperature of stator winding end (4).
4. a kind of generator casing electric leakage monitoring according to claim 2 and protective device, it is characterised in that: the power generation
Machine shell (1) is equipped with peep hole, and the peep hole is equipped with glass cover to be opened/closed, and the glass cover is complete by the peep hole
It is totally-enclosed, it is described to remove moisture the control switch that mechanism (11) further includes the glass cover opening and closing of generator peep hole.
5. according to a kind of described in any item generator casing electric leakage monitorings of claim 2-4 and protective device, it is characterised in that:
The control mechanism (10) connect with the relay, temperature-detecting device, control switch respectively.
6. a kind of generator casing electric leakage monitoring according to claim 1 and protective device, it is characterised in that: the alarm
Device (7) includes flashing lamp and buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820777519.4U CN208257617U (en) | 2018-05-23 | 2018-05-23 | A kind of generator casing electric leakage monitoring and protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820777519.4U CN208257617U (en) | 2018-05-23 | 2018-05-23 | A kind of generator casing electric leakage monitoring and protective device |
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| Publication Number | Publication Date |
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| CN208257617U true CN208257617U (en) | 2018-12-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768085A (en) * | 2018-05-23 | 2018-11-06 | 安徽机电职业技术学院 | A kind of generator casing electric leakage monitoring and protective device and its application method |
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2018
- 2018-05-23 CN CN201820777519.4U patent/CN208257617U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768085A (en) * | 2018-05-23 | 2018-11-06 | 安徽机电职业技术学院 | A kind of generator casing electric leakage monitoring and protective device and its application method |
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