CN105353278B - A kind of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding test method - Google Patents
A kind of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding test method Download PDFInfo
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- CN105353278B CN105353278B CN201510700403.1A CN201510700403A CN105353278B CN 105353278 B CN105353278 B CN 105353278B CN 201510700403 A CN201510700403 A CN 201510700403A CN 105353278 B CN105353278 B CN 105353278B
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- traveling crane
- overhead traveling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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Abstract
The invention discloses a kind of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding test method, including following construction procedure：Prepare before experiment；Confirm overhead traveling crane electric power system incoming power cable and link cable specification, model and length；Preparing high-voltage switch gear mainly includes：On-load switch, current transformer, voltage transformer and support insulator；Prepare high pressure trolley and support insulator.It is an advantage of the invention that：Solves the problem that test space safe distance is inadequate and workmen is safe；Flexible connection in series-parallel combination is used with reactor for experiment, meets the requirement of test frequency.
Description
Technical field
The present invention relates to a kind of high voltage electric equipment ac voltage withstanding test method, is to be related to a kind of overhead traveling crane in particular
High voltage supply system electrical equipment whole group ac voltage withstanding test method.
Background technology
At present, the electrical equipment of metallurgy industry overhead traveling crane high voltage supply system is typically all installed on overhead crane orbit beam, and height presses off
Close cabinet to be arranged in the walkway of track girder, high pressure trolley is vacantly arranged on the side of track girder, high-tension switch cabinet and height
It is attached between pressure trolley by high-tension cable, forms the high voltage supply system of overhead traveling crane.
Whole electric power system, installed in apart from the high-altitude of ground 30--40 rice.Track girder walkway width only has 1 meter of left side
The right side, trolley are arranged on the side of track girder, and whole electric equipment test environment space is narrow and small, is in high-altitude again.It is unfavorable for trying
Having bad luck for equipment is tested, and the safe distance of high-potting is inadequate, the easy crisis person and equipment safety.And due to each electricity
The isolation material of gas equipment is different, and insulation characterisitic is also not quite similar, as high-tension cable capacitance is larger, in capacitive characteristics, typically
Using DC break down voltage；Trolley and high-tension switch cabinet capacitance are very small, typically pressure-resistant using AC power frequency in resistive characteristic,
Two sets of different testing equipments are needed to be tested respectively on track girder walkway.
The content of the invention
In view of the shortcomings of the prior art, and it using high-tension cable is that medium will be originally in high-altitude progress to provide a kind of to the present invention
Pressure test be changed to ground progress, improve efficiency of construction, a kind of overhead traveling crane high voltage supply system for reducing construction cost electrically sets
Standby whole group ac voltage withstanding test method.
A kind of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding test method of the present invention, including following construction
Step：
Step 1: prepare before experiment；Confirm overhead traveling crane electric power system incoming power cable and link cable specification, model and length
Degree；
Preparing high-voltage switch gear mainly includes：On-load switch, current transformer, voltage transformer and support insulator；Prepare
High pressure trolley and support insulator；
Step 2: the configuration of testing equipment and the selection of the mode of connection；It is suitable according to the configuration of the capacitance size of test item
Testing equipment and the mode of connection；Overhead traveling crane high voltage supply system electrical equipment medium and high voltage cable capacitance is larger, in capacitive characteristics；
Trolley and high-tension switch cabinet capacitance are very small, in resistive characteristic；When carrying out whole group ac voltage withstanding, by the big of cable capacitance amount
Small configuration AC frequency conversion series resonant testing equipment and the mode of connection；
Step 3: in the case where not considering the capacitance of high-voltage switch gear and high pressure trolley, overhead traveling crane high voltage supply is calculated
System total capacitance, computational methods are：C=0.284uF × (0.2+0.1)=0.0852uF；Need before the test public by calculating
FormulaReasonable disposition reactor；
Step 4: inlet wire cable ac voltage withstanding is tested；AC frequency conversion series resonant testing equipment is placed on higher level's power transformation
Institute, enter the experiment of line of travel cable ac voltage withstanding；During experiment, when setting test voltage, experiment on testing equipment guidance panel
Between, selection automatic mode, testing equipment will be automatically found resonance point, and start to test；
Step 5: high voltage supply system whole group ac voltage withstanding is tested；Testing equipment placement location is constant, closes height and presses off
Close, connect whole electric power system, carry out the experiment of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding, the mode of connection
Selection during routine tests difficulty, can connect together and be tested by gained is calculated, and testing standard should use the various equipment of connection
In minimum standard；During experiment, test voltage, test period, selection automatic mode are set on testing equipment guidance panel,
Test button is pressed, testing equipment will be automatically found resonance point, start to test；During experiment, when subject thing breaks down,
Different high-voltage switch gear routine tests can be each turned off, reduces malfunction elimination scope, until finding trouble point；
Further：The overhead traveling crane electric power system incoming power cable from model YJV-8.7/10KV, sectional area be 3 ×
150mm2, length 200m.
Further：The model of the link cable, sectional area are identical with overhead traveling crane electric power system incoming power cable, single length
Spend 20m.
Further：The resistive loads such as the high-voltage switch gear require frequency in 30-100HZ.
The beneficial effects of the invention are as follows：(1) the ingenious pressure-resistant examination for being carried out script in high-altitude for medium using high-tension cable
Test and be changed to ground progress；(2) reduce testing equipment and have bad luck expense；(3) solve test space safe distance not enough and constructor
The problem of member's safety；(4) flexible connection in series-parallel combination is used with reactor for experiment, meets the requirement of test frequency.
Embodiment
With reference to embodiment, the invention will be further described.
A kind of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding test method of the present invention, including following construction
Step：
A kind of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding test method, including following construction procedure：
Step 1: prepare before experiment；Confirm overhead traveling crane electric power system incoming power cable and link cable specification, model and length
Degree；
Preparing high-voltage switch gear mainly includes：On-load switch, current transformer, voltage transformer and support insulator；Prepare
High pressure trolley and support insulator；
Step 2: the configuration of testing equipment and the selection of the mode of connection；It is suitable according to the configuration of the capacitance size of test item
Testing equipment and the mode of connection；Overhead traveling crane high voltage supply system electrical equipment medium and high voltage cable capacitance is larger, in capacitive characteristics；
Trolley and high-tension switch cabinet capacitance are very small, in resistive characteristic；When carrying out whole group ac voltage withstanding, by the big of cable capacitance amount
Small configuration AC frequency conversion series resonant testing equipment and the mode of connection；
Step 3: in the case where not considering the capacitance of high-voltage switch gear and high pressure trolley, overhead traveling crane high voltage supply is calculated
System total capacitance, computational methods are：C=0.284uF × (0.2+0.1)=0.0852uF；Need before the test public by calculating
FormulaReasonable disposition reactor, use 3 inductance values in parallel for 3.33H reactor, obtain test frequency
Step 4: inlet wire cable ac voltage withstanding is tested；AC frequency conversion series resonant testing equipment is placed on higher level's power transformation
Institute, enter the experiment of line of travel cable ac voltage withstanding；During experiment, when setting test voltage, experiment on testing equipment guidance panel
Between, selection automatic mode, testing equipment will be automatically found resonance point, and start to test；Because exchange of the national standard to cable becomes
Standard that frequency series resonance is pressure-resistant requires frequency between 20-300HZ.Therefore by the reactor parallel connection that 3 inductance values are 3.33H
Martingale, you can meet test requirements document；Test voltage presses national standard UExamination=2.5U0=2.5 × 8.7=21.75KV.
Step 5: high voltage supply system whole group ac voltage withstanding is tested；Testing equipment placement location is constant, closes height and presses off
Close, connect whole electric power system, carry out the experiment of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding, the mode of connection
Selection uses 3 inductance values as the martingale in parallel of 3.33H reactor by gained is calculated；Test voltage presses national standard：
3KV on-load switches UExamination=25KV, 3KV voltage transformers UExamination=20KV, 3KV current transformers UExamination=20KV, 3KV support insulators
UExamination=22KV, YJV-8.7/10KV high-tension cables UExamination=2.5U0=2.5 × 8.7=21.75KV, during routine tests difficulty, it can connect
Tested together, testing standard should use the minimum standard in the various equipment of connection；During experiment, operated in testing equipment
Test voltage, test period, selection automatic mode are set on panel, presses test button, testing equipment will be automatically found humorous
Shake a little, start to test；During experiment, when subject thing breaks down, different high-voltage switch gear routine tests can be each turned off,
Malfunction elimination scope is reduced, until finding trouble point；
It is preferred that：The overhead traveling crane electric power system incoming power cable from model YJV-8.7/10KV, sectional area be 3 ×
150mm2, length 200m.
It is preferred that：The model of the link cable, sectional area are identical with overhead traveling crane electric power system incoming power cable, joint length
20m。
It is preferred that：The resistive loads such as the high-voltage switch gear require frequency in 50HZ.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks
Domain, it is included within the scope of the present invention.
Claims (4)
1. a kind of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding test method, it is characterised in that applied including following
Work step is rapid：
Step 1: prepare before experiment；Confirm overhead traveling crane high voltage supply system incoming power cable and link cable specification, model and length
Degree；
Preparing high-voltage switch gear mainly includes：On-load switch, current transformer, voltage transformer and support insulator；Prepare high pressure
Trolley；
Step 2: the configuration of testing equipment and the selection of the mode of connection；Suitable examination is configured according to the capacitance size of test item
Test equipment and the mode of connection；Overhead traveling crane high voltage supply system electrical equipment medium and high voltage cable capacitance is larger, in capacitive characteristics；Wiping
Line and high-tension switch cabinet capacitance are very small, in resistive characteristic；When carrying out whole group ac voltage withstanding, match somebody with somebody by the size of cable capacitance amount
Put AC frequency conversion series resonant testing equipment and the mode of connection；
Step 3: in the case where not considering the capacitance of high-voltage switch gear and high pressure trolley, overhead traveling crane high voltage supply system is calculated
Total capacitance, computational methods are：；Need to pass through calculation formula before the test
Reasonable disposition reactor, whereinFor test frequency, L values 1.11 are inductance value, unit H；
Step 4: incoming power cable ac voltage withstanding is tested；AC frequency conversion series resonant testing equipment is placed on higher level's power transformation
Institute, carry out the experiment of incoming power cable ac voltage withstanding；During experiment, test voltage, examination are set on testing equipment guidance panel
Time, selection automatic mode are tested, testing equipment will be automatically found resonance point, and start to test；
Step 5: overhead traveling crane high voltage supply system whole group ac voltage withstanding is tested；Testing equipment placement location is constant, closes height and presses off
Close, connect whole electric power system, carry out the experiment of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding, the mode of connection
Selection during routine tests difficulty, can connect together and be tested by gained is calculated, and testing standard should use the various equipment of connection
In minimum standard；During experiment, test voltage, test period, selection automatic mode are set on testing equipment guidance panel,
Test button is pressed, testing equipment will be automatically found resonance point, start to test；During experiment, when test item breaks down,
Different high-voltage switch gear routine tests can be each turned off, reduces malfunction elimination scope, until finding trouble point.
2. a kind of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding test method according to claim 1, its
Be characterised by, the overhead traveling crane high voltage supply system incoming power cable from model YJV-8.7/10KV, sectional area be 3 ×
150mm2, length 200m.
3. a kind of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding test method according to claim 1, its
It is characterised by, the model of the link cable, sectional area are identical with overhead traveling crane high voltage supply system incoming power cable, joint length
20m。
4. a kind of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding test method according to claim 1, its
It is characterised by, the resistive load such as described high-voltage switch gear requires frequency in 30-100HZ.
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| CN201510700403.1A CN105353278B (en) | 2015-10-26 | 2015-10-26 | A kind of overhead traveling crane high voltage supply system electrical equipment whole group ac voltage withstanding test method |
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| CN105353278B true CN105353278B (en) | 2018-03-06 |
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Citations (4)
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| CN201697996U (en) * | 2010-02-04 | 2011-01-05 | 厦门中唐电气有限公司 | Withstand voltage and leakage testing device for insulated safety device |
| CN102368089A (en) * | 2011-11-17 | 2012-03-07 | 江苏省电力公司南京供电公司 | Test method of carrying out partial discharge measurement based on high-voltage cable voltage withstand test |
| CN103207358A (en) * | 2013-04-15 | 2013-07-17 | 广东电网公司佛山供电局 | High-voltage power cable nondestructive detection device |
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| JPH08136609A (en) * | 1994-11-11 | 1996-05-31 | I K D:Kk | Withstand voltage testing device |
| JP5244211B2 (en) * | 2011-04-27 | 2013-07-24 | シャープ株式会社 | High voltage inspection device |
| KR101581764B1 (en) * | 2014-01-27 | 2016-01-04 | 엘에스산전 주식회사 | Withstand voltage test device for switchgear |
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2015
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5514967A (en) * | 1994-08-16 | 1996-05-07 | Zelm; Richard J. | Automatic insulation test equipment for testing high voltage electrical equipment at the rated voltage level |
| CN201697996U (en) * | 2010-02-04 | 2011-01-05 | 厦门中唐电气有限公司 | Withstand voltage and leakage testing device for insulated safety device |
| CN102368089A (en) * | 2011-11-17 | 2012-03-07 | 江苏省电力公司南京供电公司 | Test method of carrying out partial discharge measurement based on high-voltage cable voltage withstand test |
| CN103207358A (en) * | 2013-04-15 | 2013-07-17 | 广东电网公司佛山供电局 | High-voltage power cable nondestructive detection device |
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| XLPE电缆主绝缘状态检测方法的研究;吴云飞;《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》;20060515(第5期);C042-4 * |
| 基于DSP 的交联电缆耐压测试仪的研制;李小龙 等;《电源技术》;20131231;第37卷(第12期);2229-2231 * |
| 基于现场交接试验的高压电缆交流耐压及局放技术应用研究;王一波;《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》;20150315(第3期);C042-1278 * |
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