HUAC-22/22-10kV
10 kV Variable Frequency Series Resonant Test System
AC withstand testing of 10 kV cables, switchgear and transformers, tuning to resonance anywhere from 30 to 300 Hz.
IEC 60060-1DL/T 849.6
MODEL HUAC-YDJ-10kVA/150kV
10 kVA / 150 kV Cascade AC Hipot Test Set
Cascade AC hipot test set with two oil-immersed transformers for 150 kV AC withstand tests on transformers, cables and insulators. 220–380 V, 50/60 Hz supply.
- Two oil-immersed transformers in cascade for 150 kV AC output
- Oil-cooled, rated for intermittent short-time operation
- Rugged octagonal steel housings
- Zero-start interlock and overcurrent protection
- High-voltage and low-voltage indication with test timer and alarm
- 220–380 V, 50 / 60 Hz power supply for use worldwide
Overview
The HUAC-YDJ-10kVA/150kV is a cascade AC withstand voltage (hipot) test set for high-voltage insulation tests on power transformers, cables, insulators and other electrical equipment. It is used by power utilities, electrical equipment manufacturers and test laboratories for intermittent, short-time insulation tests indoors.
Two oil-immersed test transformers are connected in cascade: each stage delivers 75 kV, and together they produce 150 kV AC. A 100 kV insulation support is included as standard. A matching control box with a 10 kVA voltage regulator raises the voltage smoothly from zero and shows the high-voltage and low-voltage readings, with a test timer and protection built in.
System components
- First-stage transformer: 10 kVA, 200 V input, 75 kV / 130 mA output, 200 V cascade (excitation) winding, 80 kg
- Second-stage transformer: 5 kVA, 200 V input, 75 kV / 66 mA output, 70 kg
- Control box: 10 kVA regulator, 220–380 V input, 50 / 60 Hz, 0–230 V output, 27 kg
- Insulation support: 100 kV, standard
For high-capacitance test objects such as long cables, GIS and large transformers, a series resonant test system needs far less input power. To measure the test voltage directly at the high-voltage side, add the 100 kV AC/DC high voltage divider.
Technical specifications
| General | |
|---|---|
| Model | HUAC-YDJ-10kVA/150kV |
| Output voltage | 150 kV AC (2 × 75 kV in cascade) |
| Rated capacity | 10 kVA |
| Power supply | 220 – 380 V AC, 50 / 60 Hz |
| Frequency | 50 / 60 Hz |
| Working mode | Intermittent short-time |
| First-stage transformer | |
| Capacity | 10 kVA |
| Input | 200 V AC, 50 / 60 Hz, 50 A |
| Output | 75 kV AC, 130 mA |
| Cascade winding | 200 V |
| Meter winding | 100 V |
| No-load current | ≤ 6 % of rated |
| Impedance | 8.4 % |
| Dimensions | 480 × 330 × 950 mm |
| Weight | 80 kg |
| Second-stage transformer | |
| Capacity | 5 kVA |
| Input | 200 V AC, 50 / 60 Hz, 25 A |
| Output | 75 kV AC, 66 mA |
| Meter winding | 100 V |
| No-load current | ≤ 6 % of rated |
| Impedance | 8.4 % |
| Dimensions | 380 × 330 × 850 mm |
| Weight | 70 kg |
| Control box | |
| Regulator capacity | 10 kVA |
| Input | 220 – 380 V AC, 50 / 60 Hz |
| Input current (220 V) | 50 A |
| Output | 0 – 230 V AC |
| Dimensions | 480 × 330 × 260 mm |
| Weight | 27 kg |
| Common | |
| Cooling | Oil-immersed |
| Housing | Octagonal steel |
Specifications may change without notice. Contact us for the latest datasheet.
Applications
Power transformersPower cablesInsulatorsElectrical equipment manufacturersHigh-voltage test laboratories
Videos
150 kV cascade AC hipot test set: withstand test
Downloads
The datasheet and user manual for this instrument are sent on request, usually within one business day.
Frequently asked questions
What is a cascade AC hipot test set?
Two or more test transformers are connected so that the second stage sits at the output potential of the first. Their voltages add up, so two 75 kV transformers give 150 kV AC while each unit stays small enough to handle.
What can it test?
AC withstand voltage tests on power transformers, cables, insulators and other electrical equipment in power systems, factories and test laboratories.
Why is the working mode intermittent short-time?
Withstand tests apply the voltage for a limited time, typically one minute. The oil-cooled transformers are rated for this duty, not for continuous operation at full load.
How much test current is available at 150 kV?
The cascade is limited by the second-stage transformer, about 66 mA at 150 kV. For highly capacitive objects such as long cables, a series resonant test system is the better choice.
What power supply does it need?
It works on 220 V to 380 V AC, 50 Hz or 60 Hz, so it suits power grids in Europe, the Americas and Southeast Asia. At 220 V the input current is up to 50 A. Tell us your site supply when you order.
Have another question? Ask our application engineers.
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IEC 60270IEC TS 62478
HUAC-XB
Variable Frequency Series Resonant Test System, XB Series
XB series resonant test system, 20–300 Hz, Q > 50, distortion < 1 %, units under 40 kg, for AC withstand tests on cables, transformers, GIS and generators.