General Introduction:
 
SWT-VB can monitor synchronously maximum six contacts. the tester can be operated by its own keyboard and save maximum 15 PCS test results that can be printed immediately. the test curve is displayed on the LCD screen. the PC is the alternative option to take test; It can read, analyze, save and print the data of the tester. SWT-VB is the real portable apparatus according with IEC new standards.  
Product general functions:
                                      
1.the tester has colour LCD screen that can display the controlling process, measurement result and print the results on the site.
2.the tester has simple operation system with auto-test function. To test the general close, open and to display the entire process just need to press the test button once.
3.the tester can automatically identify switchgear status (on or off) to avoid wrong operation.
4.the tester can perform six test types of switchgears: close, open, close-open, open - t - close-open, open -t- close-open - t - close-open and close-open -t - close-open.the auxiliary contact spot instead of sensor is to take rough measurement.It is flexible to choose the sensor installed on any one of the A or B or C Phase of contact No.1or 2.
5.There are alternative options to take measure: displacement sensor and angle displacement sensor.
6.Test controlling ways include internal controlling, external controlling and manual controlling.
7.the tester can measure accurately the current peak value and varied curve of the open and close coil.
8.There are four definition modes: percentage of total travel, percentage of contacts' distance, time and travel to respectively definite the contact moving speed to meet varies speed test requirements.
9.the tester can directly and accurately measure the contacts' distance.
10.the tester can measure and display port waveform, rebound peak value, bounce, over-travel, over-stroke and so on.
11.the tester can test the data of circuit breaker mechanical characteristics like time and speeds of opening and closing at the different time. It not only meets the old test standards but also new test standards.
Main technical data  :
                                       
Power supply: AC 220V±10%  50Hz±5HZ
Work environment temperature: -10oC~60oC
Maximum output current of inner DC power supply: 10A
Relative moisture: ≤90%
Adjustable voltage range: 25 V~300V
Acceptable external power supply: 0~10A (remark: the external AC contactor is needed when the current value is above 10A)
Mechanical travel characteristics sampling frequency: 40KHz                     
Sampling resolution: 16bit
Time measurement scope:0.1ms-999.9ms    resolution:0.025ms                       precision±0.05ms
Speed measurement range:0.01m/s-0m/s    Speed measurement resolution:0.01m/s    Reading: ±0.02m/s  Precision: 1%
Travel measurement range: 0 mm~999.99mm          Resolution: 0.1mm             Precision: 0.05
Coil current waveform sampling frequency: 40KHz      Sampling precision: ≤0.1%
Coil current measurement scope:0~15A (standard)According to the clients demand, the measurement scope can be setup: 0~300A