Compressor Stator Vacuum Testing Machine, Winding Resistance Tester
1. Stator Vacuum Testing introduction
1.1. How can we check the insulation resistance between enameled
wires?
It can be inspected by the surge test. There are many ways to test
the turn-to-turn insulation of windings, but the voltage impulse
has been widely used in the world. It is featured with simple
circuit and convenient operation. The voltage can be applied to the
stator directly, which makes the test result more precisely.
1.2. Why choose the Stator Vacuum Testing Machine to test surge?
The coil defect of the product is easily to be found in negative
pressure environment. The lower the pressure, the longer the arc
will be caused under same voltage. The working environment of the
compressor stator is very close to vacuum.
2. Test
Rotation, DC resistance, AC Hipot, insulation resistance, surge
Motor picture is shown as below.
3. Technical specification
3.1. Direction of rotation
| rotation mode |
| rotation | CW, CCW, still |
3.2. DC Winding resistance
| testing range and precision | 10.0mΩ～20KΩ ±(0.3%×display value+3 words) temperature compensation
can be set. |
| test time range / resolution | 0.5～999s 0.1s/step
|
| temperature probe test range / precision | -10.0°C~+50.0°C；±0.5°C(range:-10°C~+50°C) |
3.3. AC Hipot
| output voltage setting range and precision | AC 500～5000V ±(2%×setting value+10V) |
| breakdown current testing range / precision | 0.10～20.00mA ±(2%×display value+0.05mA) |
| Hipot current presetting alarm range | Max:0.10～20.00mA；Min:0.00～20.00mA |
| Hipot current / resolution | ±(2%×display value+0.05 mA)；0.01 mA |
| test time range / resolution | 0.5～999.9s 0.1s/step |
3.4. Insulation resistance:
| output voltage setting range / precision | DC 500V/1000V ±(2%×display value+10V) |
| insulation resistance testing range / precision | 1～500MΩ ≤100MΩ:±(3%×display value+0.5MΩ) ；>100 MΩ:±(5%×display
value+5MΩ) |
| insulation resistance alarm setting range | Max: 0～500MΩ; Min: 1～100MΩ |
| test time range / resolution | 0.5～999s 0.1s/step |
3.5. Surge
| working ambient | comparatively vacuum |
| output voltage setting range / precision | 500～5000V ±(3%×display value+8V) |
| waveform comparison | area,area difference,corona and phase. 3 waveforms displayed in the testing interface； |
4. Stator vacuum testing machine picture
