HGZT-M 50 kVA Partial Discharge Testing System with 150 kV Output and 0.1 pC Sensitivity for Power Equipment

The installation location should be level with a slope less than 5°.

Local discharge level (spatial interference)

less than 2pc

Partial discharge interference (power supply voltage source)

less than 10pc

Protection features

overcurrent protection ； Breakdown and flashover protection; Zero position protection upon startup; Power failure protection; Linkage protection for the cooling fan

System control

enables control of both three-phase power supplies and single-phase industrial-frequency power systems

Software functionality

performs testing through communication with the partial discharge detector. It has a one-click feature to generate test reports. Supports third-party access and database data interaction.

Power supply voltage and frequency

Three-phase 400V ±10%; 50Hz

Power supply capacity

greater than 50 kVA

Rated output power

30 kW

Rated output voltage

line voltage 0–310 V, continuously adjustable (phase angle difference 120° ± 1°)

Rated output current

Line current 75A

Output waveform

pure sine wave

Phase count

Three-phase four-wire system

Output waveform distortion rate

≤1.0%

Output voltage instability

≤1.0%

Three-phase output symmetry

Three-phase line voltage imbalance ≤2%; The phase deviation angle difference between the three phases is ≤1.0%

Cooling method

Forced air cooling

Frequency adjustable range

50Hz to 300Hz

Output frequency resolution

0.1 Hz

Output frequency instability

≤0.5%

Noise level

≤80 dB

Rated capacity

50 kVA

Input side rated voltage

320V

Phase configuration

three-phase four-wire system, YN-D

Input side rated current

50A

Rated output voltage

900V

Insulation level

Low-voltage winding to ground: 3 kV/1 min; The high-voltage winding induces a voltage of 1.2 times for 1 minute

Rated frequency

50–300 Hz

Partial discharge level

The partial discharge quantity at rated voltage is ≤5 pC

Rated capacity

50 kVA

Input side rated voltage

400V

Phase count

Single-phase

Input side rated current

132 A

Output side rated voltage

150 kV

Insulation level

Low-voltage winding to ground: 5 kV/1 min; The high-voltage winding induces a voltage of 1.2 times for 1 minute

Insulation method

sulfur hexafluoride gas

Rated frequency

50–300 Hz

Partial discharge level

The partial discharge quantity at rated voltage is ≤5 pC

Rated voltage

150 kV

Pressure rating

150 kV

Operating frequency

50–300 Hz

Capacitance

C1 = 300 pF ± 5%

Partial discharge level

<5 pC at rated voltage

Rated voltage

150 kV

Rated current

0.2 A

Operating frequency

50–300 Hz

Resistance

10 kΩ ±5%

Partial discharge level

<5 pC at rated voltage

Rated voltage

60 kV

Pressure rating

60 kV

Operating frequency

50–300 Hz

Capacitance

C1 = 300 pF ± 5%

Partial discharge level

<5 pC at rated voltage

Rated voltage

440 V AC

Rated current

80 A

Filter frequency band range

10–300 kHz

Rated capacity

50 kVA

Insulation method

Dry type

Partial discharge level

<5 pC at rated voltage

Number of channels

4 independent channels

Sampling rates

1M,5M, or 10M available

Sampling accuracy

12-bit

Range switching

6 levels-40 dB, -20 dB, 0 dB, 20 dB, 40 dB, and 60 dB

Measurement frequency band

3 dB bandwidth from 10 kHz to 1 MHz

Digital filtering

Select from 10 kHz to 1 MHz

Program-controlled filter segmentation

Low-end frequencies: 10 kHz, 20 kHz, 40 kHz, 80 kHz High-frequency range: 100 kHz, 200 kHz, 300 kHz, 400 kHz

Nonlinear error within this range

5%

Measurement range

0.1 pC to 10,000 pC

Sensitivity

0.1 pC

Test sample capacitance range

6 pF to 250 µF

Test power supply frequency range

50–500 Hz

Accessorie

Square wave calibrator, impedance input unit, discharge rod