HDJS-8000 Transformer Capacitance Tan Delta Tester
HDJS-8000 Transformer Capacitance Tan Delta Tester is a automatic
on-site tester that is designed to measure dielectric loss（tg）and
the capacitance （Cx） of electric equipment. The measure result can
be displayed on the LCD screen and printed by micro-printer .It’s
suitable for testing on transformer, capacitor, insulating bush,
CT/PT, MOA .
1. The instrument adopts complex number current method to measure
capacitance, dielectric loss and other parameters. The measured
result is highly accurate and it is easy to realize automatic
2. The instrument adopts variable frequency technology to eliminate
50Hz/60Hz power frequency interference. The measurement data will
be get even under the strong electromagnetic interference.
3. 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.
4. 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.
5. 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
6. GST measurement adopts ivddv technology to avoid unstable data
provided by previous GST measurement.
7. 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.
8. 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.
9. The instrument has a ground-fault protection function. If the
instrument is not grounded or grounded incorrectly, the instrument
will refuse to enter into normal procedure and output HV.It has the
over-current protection function, which can protect the instrument
from damage when the test object is in a short circuit or
10. The instrument has a function of electric shock protection.
When the instrument operator suffers an electric shock because of
error operation , the instrument will cut off the HV immediately to
ensure the security of operator.
Accuracy: Cxread ×1%+1pF）
Anti interference: Frequency conversion anti interference, under
200% interference, still can reach above accuracy.
Capacitance range：Inner HV: 3pF～60000pF/10kV 60pF～1F/0.5kV
Outside HV: 3pF～1.5F/10kV 60pF～30F/0.5kV
Resolution: Max. 0.001pF4 significant figures
Tg range: unlimited, resolution: 0.001%, capacitance, inductance,
resistance can be identify automatically.
Test current range: 10A～1A
Inner HV:Setting voltage range: 0.5～10kV
Max.Output current: 200mA
Increase/decrease voltage: continuous slide regulating.
Test frequency: 45, 50, 55 single frequency
45/55Hz auto double frequency conversion
Outside HV: Positive connection max. test current 1A, Power
frequency or frequency conversion 40-70Hz
Negative connection max. test current: 10kV/1A, power frequency or
frequency conversion 40-70Hz
CVT self excitation LV output: voltage 3～50Vcurrent 3～30A
Measuring duty: about 30sit depend on measuring methods.
Input power supply: 180V～270VAC50Hz±1%local supply or by generator.
Communication interface: RS232.
Printer: Build-in thermal printer.
Environmental temperature: -10℃～50℃
Relative humidity: <90%
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