CN201681138U - Lightweight type generator power-frequency alternating-current withstand voltage tester - Google Patents
Lightweight type generator power-frequency alternating-current withstand voltage tester Download PDFInfo
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- CN201681138U CN201681138U CN2010201422614U CN201020142261U CN201681138U CN 201681138 U CN201681138 U CN 201681138U CN 2010201422614 U CN2010201422614 U CN 2010201422614U CN 201020142261 U CN201020142261 U CN 201020142261U CN 201681138 U CN201681138 U CN 201681138U
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Abstract
The utility model relates to equipment (tester) for insulation test of a generator stator winding, in particular to a lightweight type generator power-frequency alternating-current withstand voltage tester. The lightweight type generator power-frequency alternating-current withstand voltage tester is characterized by comprising a voltage regulator (TB); the input ends of the voltage regulator (TB) are connected with a power supply by a switch circuit and the output ends thereof are connected with the input ends of a high-voltage transformer (B); one end in the output ends of the high-voltage transformer (B) is grounded, and the other end thereof is also directly connected with an alternating-current testing end while being connected with a direct-current testing end by a high-voltage rectifying circuit; and the alternating-current testing end is grounded respectively by a high-voltage reactor (G), a current-limiting water resistor (R) and a discharging sphere gap (QX) which are connected in series, and a voltage divider (FYQ). The lightweight type generator power-frequency alternating-current withstand voltage tester realizes light, safe and high-efficiency use effect, effectively replaces the original heavy and fussy testing equipment and brings great convenience for electric testing staffs and testing work in a power plant.
Description
Technical field
The utility model relates to a kind of stator winding insulation in generator lab-size equipment (exerciser), especially portable generator industrial frequency AC puncture tester.
Background technology
Generator is the most valuable electrical equipment in generating plant, and this pilot project is the mandatory project of national GB.The industrial frequency AC withstand voltage test of generator unit stator winding is the mandatory test of carrying out according to national standard and industry standard (rules), is the necessary means that guarantees the safety and economic operation of electric system and electrical equipment.Wherein commissioning test, overhaul test, preventive trial can determine that can new clothes equipment put into operation, or find the hidden danger of the electrical equipment put into operation in advance, and prevention apparatus damages.In this class test, the industrial frequency AC withstand voltage test is particularly important.This test is the key project of examination insulation of electrical installation intensity.
Along with China's power system development, 330MW and above Generator Set have become main force's genset of China, and the genset of 600MW, 1000MW larger capacity also has a great deal of in China.Because the generator single-machine capacity increases, generator unit stator winding-to-earth capacity amount is increased, the increase of electric capacity, when industrial frequency AC is withstand voltage, capacitance current during high-potting just increases, the generator of a 330MW for example, and single-phase ground capacitance reaches 0.2 μ f, during test, capacitance current under specified trial voltage is up to 2 amperes, and the capacity of test high-tension transformer needs more than the 80KVA, and not only testing transformer heaviness (2.5 tons) pressure regulator needs shifting coil voltage regulator, weight is also more than 2 tons, add heavy telephone console, general assembly (TW) reaches the 5-6 ton, and the site test power supply capacity is big, sometimes be difficult to solve, carry out extremely inconvenient to experiment work.
The utility model content
The utility model provides a kind of portable generator industrial frequency AC puncture tester, the DC break down voltage of this compatible generator of instrument while and the test of leakage current project, and simple with the existing equipment structure compared, weight more significantly reduces, thereby has made things convenient for use.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of portable generator industrial frequency AC puncture tester, its special feature is, comprise a pressure regulator, the input end of this pressure regulator is connected with power supply by on-off circuit, and the input end of output termination one high-tension transformer of this pressure regulator, end ground connection in the output terminal of this high-tension transformer, the other end also directly connect the alternating-current measurement end when connecing the DC test end by high-voltage rectifier; Above-mentioned alternating-current measurement end is respectively by high voltage reactor, the current limliting water resistance that is in series and ball discharge crack and voltage divider ground connection.
Wherein on-off circuit is the relay latching circuit.
Its repeat circuit latching circuit comprises two pairs of normally opened contacts in the A.C. contactor that is connected on respectively between pressure regulator input end and the power supply, another of this A.C. contactor often opened to connect with the coil of a normally closed button and A.C. contactor after the button parallel connection to normally opened contact and again and constituted on-off circuit, and this on-off circuit is connected in parallel on both ends of power.
Wherein the input end at high-tension transformer is equipped with current transformer, and this current transformer is connected with the coil of current relay, thereby and a pair of normally closed contact of this current relay is connected in the on-off circuit deenergization when electric current surpasses setting valve.
Wherein high-voltage rectifier is a high voltage silicon rectifier stack.
Wherein voltage divider is a RC divider.
The utility model is used for the industrial frequency AC withstand voltage test of generator unit stator winding, especially the industrial frequency AC withstand voltage test of high-rating generator stator winding.The utility model utilizes the principle of shunt compensation cleverly, alleviated the weight of testing equipment greatly, as: do the industrial frequency AC withstand voltage test of a 330MW generator, the general assembly (TW) of test battery equipment from before the 5-6 ton, be relieved to present 200kg, test required experiment power supply capacity big (80KVA) in the past, only need 10KVA just can finish experiment work now, and guaranteed frequency and waveform quality.
Description of drawings
Accompanying drawing 1 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises the pressure regulator TB of a band control box, its input end of pressure regulator TB in this control box is connected with power supply by on-off circuit, and the pressure regulator TB that should be with control box exports the input end of a high pressure of termination (test) transformer B, X end ground connection in this high-tension transformer B output terminal, and high pressure output A end has two terminal A1 ends, A2 end (promptly exchanging the output of output and direct current), obtaining of direct current is through high pressure (rectification) silicon treadle-operated tilt hammer for hulling rice D rectification after the A2 end is exported, and exchanging output is directly directly to export through the A1 end from high-tension transformer B high-pressure side.
The alternating current-direct current output terminal can be selected output level pressure type (being AC and DC) for different equipment and different requirements, and this exerciser has been realized two kinds of purposes.Be the industrial frequency AC withstand voltage test of generator and the test of DC break down voltage and leakage current.
The pressure regulator TB of (as shown in Figure 1) band control box is connected with HT testing transformer when carrying out the industrial frequency AC withstand voltage test, pressure regulator TB boosts from zero, at high-voltage output end and connect one and just can finish the industrial frequency AC withstand voltage test work of generator with the reactor G that is complementary by test equipment, the current limliting water resistance R, the ball discharge crack QX that are in series and voltage divider FYQ.
As shown in Figure 1; wherein on-off circuit is the relay protection circuit that adopts in the aut.eq.; when when testing; generator insulating is in a single day breakdown; overcurrent protection current relay IJ action in the aut.eq.; can cut off the electricity supply automatically, protection generator insulating breakdown fault does not enlarge, and has also protected testing equipment not to be damaged simultaneously.
As shown in Figure 1, its repeat circuit latching circuit comprises two pairs of normally opened contacts among the A.C. contactor C that is connected on respectively between pressure regulator TB input end and the power supply, another of this A.C. contactor C often opened to connect with the coil of a normally closed button TN and A.C. contactor C after the button HN parallel connection to normally opened contact and again and constituted on-off circuit, this on-off circuit is connected in parallel on both ends of power, with what often open that button HN connects is that (travel switch XC is a little microswitch that is contained in the pressure regulator TB rotating shaft to travel switch XC, in order to prevent the maloperation design, can guarantee that pressure regulator TB starts in zero position, if pressure regulator TB is not in zero-bit, travel switch XC opens the contact, control loop is obstructed, and pressure regulator TB input end and power supply in the control device can't be connected).
As shown in Figure 1, wherein in the input end loop of high-tension transformer B, sealed in the current transformer that cooperates with current relay IJ, current relay IJ coil is connected on the secondary side of current transformer, and a pair of normally closed contact of this current relay IJ is connected on the automatic control loop of automaton, and the setting valve of current relay IJ can be according to being adjusted by the size of test equipment test electric current.When carrying out the withstand voltage test of generator industrial frequency AC; if overload or generator insulating puncture; when relay protection relay coil electric current surpasses setting valve; current relay IJ action (starting) disconnects the electric current in the control loop A.C. contactor C coil; A.C. contactor C main contacts (directly two pairs of contacts that are connected with power supply) disconnects, thus deenergization.
High-voltage rectifier is high voltage silicon rectifier stack D, carries out obtaining high-voltage DC power supply after the rectification, uses for the DC voltage withstand test of generator.
As shown in Figure 1, the ac high-voltage and the high direct voltage of HT testing transformer output are measured with RC divider FYQ.
In order to satisfy the test needs of heavy-duty generator and other electrical equipment, the utility model utilizes under the inductance state in parallel with electric capacity, the direction of inductive current and capacitance current differs the principles of electric and electronic engineering of 180 degree angles, employing is than the testing transformer of low capacity, according to generator famous brand parameter, manufactured the compensation reactor corresponding, compensated capacitance current in the shunt circuit, made testing transformer and experiment power supply only bear very little real component with shunt reactor with it.
Generator with a 330MW is an example: the general assembly (TW) that makes testing equipment reduces to 7KVA from original 80KVA, and general assembly (TW) is many from the 5-6 ton in past, is relieved to present 120 kg.Like this, voltage adjusting device, high-tension transformer B and power supply capacity will reduce greatly.The complete property of this test apparatus is good, possesses withstand voltage and the withstand voltage and leakage current test of direct current stream of industrial frequency AC simultaneously, can finish the important tests of two kinds of generators with a cover instrument.
This light reactor offset-type generator alternating current pressure-resistant tester is checked by site test, really realized light, safety, ideal effect efficiently effectively replace heavy, loaded down with trivial details in the past testing equipment, bring great convenience for power plant electricity testing crew and experiment work.
Claims (6)
1. portable generator industrial frequency AC puncture tester, it is characterized in that: comprise a pressure regulator (TB), the input end of this pressure regulator (TB) is connected with power supply by on-off circuit, and the input end of output termination one high-tension transformer (B) of this pressure regulator (TB), end ground connection in the output terminal of this high-tension transformer (B), the other end also directly connect the alternating-current measurement end when connecing the DC test end by high-voltage rectifier;
Above-mentioned alternating-current measurement end is respectively by high voltage reactor (G), the current limliting water resistance (R) that is in series and ball discharge crack (QX) and voltage divider (FYQ) ground connection.
2. portable generator industrial frequency AC puncture tester as claimed in claim 1 is characterized in that: wherein on-off circuit is the relay latching circuit.
3. portable generator industrial frequency AC puncture tester as claimed in claim 2, it is characterized in that: its repeat circuit latching circuit comprises two pairs of normally opened contacts in the A.C. contactor (C) that is connected on respectively between pressure regulator (TB) input end and the power supply, another of this A.C. contactor (C) often opened to connect with the coil of a normally closed button (TN) and A.C. contactor (C) after button (HN) parallel connection to normally opened contact and again and constituted on-off circuit, and this on-off circuit is connected in parallel on both ends of power.
4. portable generator industrial frequency AC puncture tester as claimed in claim 1, it is characterized in that: wherein the input end at high-tension transformer (B) is equipped with current transformer, this current transformer is connected with the coil of current relay (IJ), and this current relay (IJ) thus a pair of normally closed contact be connected in the on-off circuit deenergization when electric current surpasses setting valve.
5. portable generator industrial frequency AC puncture tester as claimed in claim 1 is characterized in that: wherein high-voltage rectifier is high voltage silicon rectifier stack (D).
6. portable generator industrial frequency AC puncture tester as claimed in claim 1 is characterized in that: wherein voltage divider (FYQ) is a RC divider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201422614U CN201681138U (en) | 2010-03-26 | 2010-03-26 | Lightweight type generator power-frequency alternating-current withstand voltage tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201422614U CN201681138U (en) | 2010-03-26 | 2010-03-26 | Lightweight type generator power-frequency alternating-current withstand voltage tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201681138U true CN201681138U (en) | 2010-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201422614U Expired - Lifetime CN201681138U (en) | 2010-03-26 | 2010-03-26 | Lightweight type generator power-frequency alternating-current withstand voltage tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201681138U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916385A (en) * | 2011-08-02 | 2013-02-06 | 伊春电业局 | Instrument testing protective device |
| CN104034973A (en) * | 2014-05-06 | 2014-09-10 | 国家电网公司 | Electronic current transformer testing system and testing method |
| CN104635132A (en) * | 2015-03-07 | 2015-05-20 | 国网宁夏电力公司固原供电公司 | Equipment for withstand voltage test of insulation tools and instruments |
| CN104880649A (en) * | 2015-05-19 | 2015-09-02 | 苏州市华安普电力工程有限公司 | Alternating current withstand voltage test apparatus |
| CN108387829A (en) * | 2017-08-29 | 2018-08-10 | 苏州华电电气技术服务有限公司 | A kind of industrial frequency withstand voltage test device |
| CN111551834A (en) * | 2020-06-04 | 2020-08-18 | 陕西宝光真空电器股份有限公司 | Power frequency withstand voltage detection device and method for vacuum arc-extinguishing chamber |
-
2010
- 2010-03-26 CN CN2010201422614U patent/CN201681138U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916385A (en) * | 2011-08-02 | 2013-02-06 | 伊春电业局 | Instrument testing protective device |
| CN102916385B (en) * | 2011-08-02 | 2015-04-22 | 伊春电业局 | Instrument testing protective device |
| CN104034973A (en) * | 2014-05-06 | 2014-09-10 | 国家电网公司 | Electronic current transformer testing system and testing method |
| CN104635132A (en) * | 2015-03-07 | 2015-05-20 | 国网宁夏电力公司固原供电公司 | Equipment for withstand voltage test of insulation tools and instruments |
| CN104880649A (en) * | 2015-05-19 | 2015-09-02 | 苏州市华安普电力工程有限公司 | Alternating current withstand voltage test apparatus |
| CN108387829A (en) * | 2017-08-29 | 2018-08-10 | 苏州华电电气技术服务有限公司 | A kind of industrial frequency withstand voltage test device |
| CN111551834A (en) * | 2020-06-04 | 2020-08-18 | 陕西宝光真空电器股份有限公司 | Power frequency withstand voltage detection device and method for vacuum arc-extinguishing chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZANG XU Free format text: FORMER OWNER: PENG FARONG Effective date: 20121226 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 753202 SHIZUISHAN, NINGXIA HUI AUTONOMOUS REGION TO: 101021 TONGZHOU, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121226 Address after: 101021, room 16, building 561, Barker street, two street, amusement park, Beijing, Tongzhou District Patentee after: Cang Xu Address before: 753202 production technology department, the Ningxia Hui Autonomous Region Power Generation Corporation, Shizuishan power generation industrial zone, Shizuishan Patentee before: Peng Farong |
|
| CX01 | Expiry of patent term |
Granted publication date: 20101222 |
|
| CX01 | Expiry of patent term |