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the voltage waveform isn’t affected by line voltage neither. The instrument also has
the real current test, and then the large current generated by distributed
capacitance can’t affect the judgment of real insulation.
For DC and insulation resistance test, ST9201/S/B testers use 600Hz AC to
form the DC voltage to power the test, which can assure the DC power ripple is
far less than the norm for withstanding voltage testers, thus to assure the stability
of 5000V, 10mA test.
Once connecting the load, ST9201 can not only perform independent AC
withstanding test, DC withstanding voltage test, and insulation resistance test, but
also multi–item test via the setting of test programs. When connecting with high
voltage scanner ST9121, perform multi-items and multi-products test via setting
the individual steps of the test program. Each scanner can adopt 8 channels. The
tester can be connected to two scanners, reaching up to 16 channels in total.
ST9201 series all allocate PLC interface, RS-232C, GPIB (optional), thus the
instrument can adapt to the auto test system of different required safety and
reliability.
Features:
4 test functions—AC withstanding voltage test, DC withstanding
voltage test, insulation resistance test and open & short detection.
ST9201/S/B(X) provides AC withstanding voltage test and insulation resistance
test. ST9201C(X) provides AC withstanding voltage test only.
Once connected with load, the tester can perform different tests continually.
AC withstanding voltage test 5kV/30mA (ST9201/S) or 5kV/20mA
(ST9201B/C)
In ST9201/S high voltage modular, there is an AB power amplifier circuit and a
150VA transformer, which can realize the Max. output of 5kV/30mA (1 min),
while ST9201B/C power amplifier circuit and a 100VA transformer can realize
the Max. output of 5kV/20mA (1 min).
ST9201/S has the highest limit current 30mA, Min. voltage 50V, so instrument
generates the test voltage corresponding with 50Hz/60Hz, independent power,
auto voltage adjusting rate is smaller than ±3%. It’s not necessary to adjust
output voltage after setting test voltage.
