An overview of impact resistance voltage tester and AB931 type winding
AB931 type winding interturn impulse withstand voltage tester is suitable for rated voltage 380V Small winding motor, DC motor of the following insulation detection, can also be used for transformer windings, electrical coil winding interturn insulation detection. A part of electric motor, electric tools, etc. are the main transformer coil winding, because the coil insulation material is not the same, especially the difference operator process level, making all kinds of coil products in production and handling will cause insulation damage in different degree, there are various forms of insulation failure between coil and winding in turn, these weak links and before breakdown or failure in not meet certain conditions, the inherent inductance of the coil or winding L The quality factor Q The value of distributed capacitance and resistance and basically had no obvious change, using conventional means usually could not be identified, which planted a hidden trouble to the coil. Therefore, the inter turn insulation performance is the key parameters of motor, transformer etc.. Our country GB755-87 "Basic technical requirements of rotating machine", GB14711-93 In the "general safety requirements" and other small rotary motor of the motor must be finished and semi-finished products for impregnation before and after interturn insulation withstand voltage test. At present, both at home and abroad for the detection of motor, transformer, electric winding quality of the commonly used method of pulse comparison method. Between the coil and applying a high voltage pulse is very short, used to simulate the impact of switching lightning wave, due to the high voltage pulse of short time energy is small, is a kind of nondestructive test, through the sampling analysis, can directly, quickly and correctly determine winding inter turn short circuit of various abnormal fault.
Interturn instrument can detect the following fault:
1) interturn insulation breakdown (interturn short circuit)
2) corona discharge
3) winding
4) the number of turns of difference
5) winding is connected to the wrong line, line fault block
6) the breakdown, short
The main technical parameters of impulse withstand voltage tester two, AB931 type winding:
1. power supply voltage: 220V . 5% , 50/60HZ
The 2. shock wave frequency: the frequency of 50HZ When 25HZ The frequency of power supply. 60HZ When 30HZ
The 3. shock wave voltage: 0.3~3KV The range can be adjusted continuously
4. digital peak voltage display: 0~3KV . 5%
5. storage capacitor: Zero point one Mu F (or according to user requirements)
The maximum output energy of 6: 0.45J
7. humidity: 0~40 C
Relative humidity: less than 8. 80%
9. dimensions: Four hundred and thirty-three * Three hundred and twenty * Two hundred and twelve
10. sampling oscilloscope technical parameters refer to attachment (manual)
The working principle of high voltage tester, the impact of three AB931 type winding
AB931-3A type winding interturn impulse withstand voltage tester circuit structure as shown in the block diagram. The machine is composed of digital sampling oscilloscope and mainframe. The working process is: 220V After the power supply a sampling oscilloscope, another way for the host, can enter the test condition. High pressure device starts working, high voltage power supply charging of a storage capacitor with high voltage rectifier. At this time, the SCR trigger unit receives signals, the energy storage capacitor power through the silicon controlled rectifier, a current limiting resistor to switch to switch" U~V "," V~W "," W~U ". Through the "positive" selection switch. To test the output terminals, forming a high voltage alternating pulse is applied to two different tested coil, attenuation of shock wave generated at the same time at both ends of the two test coils, the sampling circuit to the sampling oscilloscope, synchronous tracking by the oscilloscope, and clear and stable display attenuation wave shape, by coincidence of two shock waves and observation no discrimination of interturn insulation.
The operation method of impulse voltage resistance tester five, AB931 type winding
One AB931-3A Tester will produce high voltage at work, especially when using Caution!, the frame must be reliable grounding (rear panel with a grounding terminal) please read the manual carefully before use. The operating personnel must be trained.
2. access 220V The voltage of power line, oscillograph is inserted into the host power socket plate oscilloscope. The oscilloscope interface with the oscilloscope CH1 (or CH2 ) through the interface connected to the good, the foot switch access
3. boot, power indicator light, voltage adjusting knob counterclockwise to Zero Connect the sample to the rear. U , V , W Six terminal connection method (reference six. Wiring method)
4. adjusting parameters and oscilloscope menu (specific operation instructions refer to the oscilloscope)
5. select a positive measure, in press U - V The corresponding button, indicator light, tread down pedal switch, press the test button, and clockwise adjust the voltage knob to make value for the test indicators of high voltage value, observe the oscilloscope waveform to distinguish whether the interturn hidden phenomenon, and then press the V W button and W - U At the same time, the other two inter turn button discrimination phenomenon, and this is the end of the three-phase motor test. If is the detection of semi-finished products, six lead to a reverse test method is to press the test button. Other reverse.
6. if only the rear single-phase motor U , W Both groups were measured terminal method U , W Two single-phase motor main winding are respectively connected with the same type or two pay winding test.
7. if the storage method, please back ". - Comparison of two "and" storage "switch to" storage "position, and press the front panel" U-V "The key, rear output when connected to terminal" U "," U ". Through the relevant operation, there will be a standard waveform on the oscilloscope, and then press the oscilloscope" RET "Key, then press" save "the corresponding key, save on the oscilloscope waveform, and then use the same set of output terminals connected to the same type of winding or number display waveform comparison, in order to determine the inter turn problem.
Six. wiring method
Seven, complete
Impulse withstand voltage tester winding One platform
An instruction manual One share
Foot switch One only
Power cord .1 root
Test line One set
DS-5000 series digital storage oscilloscope One platform
Remote control box One only
Product certificate One share
Eight, other
1. the instrument should be to keep the temperature in the room Zero C ~ Forty C, the relative humidity is less than 80%, and in the air does not contain harmful substances to cause corrosion.
2. warranty period: from the delivery date, for a period of one year.
In 3. the company product life-long maintenance.
4. the warranty period, due to improper operation of the user caused by damage to the instrument, maintenance fee.
5. manufacturing plants have the right to change without notice of the instrument.
DS5022ME digital oscilloscope operating instructions
Connect the power (1. AC220V Press the power switch, etc.) 6S After the emergence of the surface at the top right hand corner AUTO Key to the display in the upper left corner AUTO
2. click on the right TRIGGER Box MENU The right button, the menu will appear, as shown below. If the menu is not correct please click the corresponding button, reset menu to the right now
If you use 3. CH1 According to the passage, please OFF Clear menu button, and graphics in each scan line, then click the CH1 button, then the following menu, if the menu is not correct please click the corresponding button, reset menu to the right now
More than 4. menus are correct, down to determine the parameters in the chart below CH1 All 500mVTime20.000us, adopt SCALE/ Turn knob, regulation CH All 5V - 2.00mv, adopt SCALE Turn knob adjustment Time50.00S- 20.00nS The following parameters shall prevail
5. then you can press the instrument operation method of interturn began operation, the surface oscillation wave oscilloscope, then the oscillation wave size (amplitude), length (Pin Kuan) by up and down SCALE About. SCALE Turn the knob to change
6. if you want to make the wave up and down, move around, please POSITION Turn the knob to change
7. if the waveform is not stable, please LEVEL Turn the knob to change
8. note that the other button can not move as much as possible not to move
9. if the storage method, in determining a good waveform on the oscilloscope, press" RET "Key, then press" save "corresponding keys on the waveform storage oscilloscope.