2. The instrument adopts variable frequency technology to eliminate
50Hz/60Hz power frequency interference. So a reliable data will be reachable
even under the strong electromagnetic interference.
3. The instrument adopts large screen LCD . In the process of testing,
Chinese menu prompt is visualized and easy to operate.
4. The instrument is easy to operate and the measuring process is
controlled by microprocessor. Once a suitable measuring method is selected,
the data measurement will complete automatically under the control of
microprocessor.
5. The instrument is designed to be an integrated model with reference
capacitor and HV power supply in it, enables site test measurement and
reduces site wiring.
6. The instrument is equipped with CVT testing function, which can
achieve CVT self-exciting testing without external accessories and measure
the capacitance and dielectric loss of C1 and C2 by at a time.
7. GST measurement adopts ivddv technology and avoids unstable data
provided by previous GST measurement.
8. The instrument provides low voltage shell function of GST. When the
bus of 220kV CVT is grounded, dielectric loss measurement can be conducted
for C11 without removing 10 kV GST.
9. The instrument has a function of measuring high-voltage dielectric loss.
It can carry out dielectric loss test with over 10kV with the help of voltage
transformer or series resonance.
10. The instrument has a ground-fault protection function. In case that the
instrument is not grounded or grounded incorrectly, the instrument will refuse
to enter into normal procedure and output HV. As for the over-current
protection function, it will protect the instrument from damage when the tested
article is in a short circuit or breakdowns.
11. The instrument has a function of electric shock protection. When the
instrument operator suffers an electric shock due to incaution, the instrument
8
