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High Voltage Instruments has been a manufacturer of quality high voltage test equipment for over 30 years. We are located in Danbury, CT with a sales and repair service facility in Budapest, Hungary.
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IMPULSE GENERATOR
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The impulse generator is a lightning strike simulator capable of producing a waveform, which conforms to industry standards. Rise time is 1.5 microseconds, the tail time is 50 microseconds long. The unit is constructed with plug-in type resistors for ease of waveform changing.
They are available from 200 kV to 1500 kV.
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| Model No | LITTLE GIANT | Top of Page |
| Description | Lightning strike 1.2/50 microsec. 200 kV Impulse Generator is portable, weights only 50 lbs, capable to test switchgears, circuit breakers, distribution transformers. |
| Features | 5 stages 0.1 mF/stage Marx Generator,
Waveform 1.2/50 microsec,
Switching surge could be set with resistors change,
Reversible power supply,
Digital voltage control, just dial the test voltage, press a button and generates the right impulse,
Build inside capacitive voltage divider / preload capacitor. |
| Main Supply | 115V 3 Amps |
| Size | 28” H x 16” W x 10” D |
| Weights | Only 50 lbs [ 23 kg ] |
| Including | Owon digital battery scope to see the voltage wave shape.
10 cm calibrating share gap.
Digital temperature and humidity meter.
| | Price | $ 19,500.-
Mostly from stock |
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 IG-300
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| Model No | IG-300 | Top of Page |
| Description | 300 kV 6 kJ complete impulse generator |
| Features | Compact design
Welded PVC Structure
Dust enclosure
Optional computer interface
Advanced operator friendly design
In order to make a given value impulse, the operator only has to dial the requested Output voltage, and press the Impulse button.
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| Size | | Capacitor Bank and Power Supply | 26¼W 56¼H 40¼D |
| Controller | 19¼W 51¼H 12¼D |
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| Including | Capacitor bank,
Remotely controlled reversible power supply,
Wave forming resistors,
Voltage divider,
Preload capacitor,
Digital controller,
All cables
Capacitor Bank and Power Supply
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| Main Supply | 115V or 240V 20 Amps Standard outlet |
| Price | $ 46,000.-
Available from stock, FOB Danbury or Budapest |
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IG-400
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| Model No | IG-400 | Top of Page |
| Description | 400 kV 8 kJ complete impulse generator |
| Features | Compact design,
Welded PVC Structure,
Dust enclosure,
Optional computer interface,
Advanced operator friendly design.
In order to make a given value impulse, the operator only has to dial the requested output voltage, and press the Impulse button.
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| Size | | Capacitor Bank and Power Supply | 30¼W 75¼H 40¼D |
| Controller | 19¼W 51¼H 12¼D |
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| Including | Capacitor bank,
Remotely controlled reversible power supply,
Wave forming resistors,
Voltage divider,
Preload capacitor,
Digital controller,
All cables,
Capacitor Bank and Power Supply.
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| Main Supply | 115V or 240V 20 Amps Standard outlet |
| Price | $ 58,000.-
Delivery 5 weeks, FOB Danbury or Budapest |
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IG-1200
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| Model No | IG-1200 | Top of Page |
| Description | 1200 kV 40 kJ complete impulse generator |
| Price | $ 198.000,-
Delivery 12 weeks, FOB Danbury or Budapest |
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DIGITAL CONTROL FOR IMPULSE GENERATOR
DC-1
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| Model No | DC-1 | Top of Page |
| Description | Digitally controls every function of the impulse generator. It works with any impulse generator. |
| Features | Polarity Switch
Output Voltage dial
Full / Reduced (Actual impulse voltage) wave switch
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HIGH VOLTAGE IMPULSE DIVIDERS
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We are manufacturing resistive and critically damped capacitive impulse voltage dividers.
300kV resistive voltage divider is $ 3,500.–
Different voltage divider and preload capacitor prices are available on request.
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COMPLETE AUTOMATIC TEST SYSTEM FOR IMPULSE TESTING OF DISTRIBUTION TRANSFORMERS
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High Voltage Instruments has developed a revolutionary new high voltage impulse measuring system with fiber optic isolation. Our patented isolation system created by Dr. Aladar Kohalmi (Patent Pending No. P0402120) connects the digitizer which is built into the high voltage divider, to the computer by using fiber optic cable.
This system eliminates the galvanic connection between the high voltage ground (impulse generator), the measuring system (computer) and the operator. The old outdated digital recorders still use coaxial cables and heavy EMI/RFI enclosures.
During the fast rise-time of the high voltage impulse, high current flows through the grounding wires and coaxial cable shield, causing large measurement errors. Furthermore, this high current can potentially damage the computer, and endanger the operator. In our years of experience in the field, we have seeing a difference in potential greater than 50 kV between a “well” grounded generator and far earth ground.
We are manufacturing two sets of digitizer:
- Digitizer without divider
- Digitizer with divider
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Digitizer without divider
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Specifications | Top of Page |
| Applications | Lightning and Switching surge tests |
| Resolution, Vertical | 14 bit (16384 steps) |
| Sampling rate | 100 MS/sec for Lightning test,
10 MS/sec for Switching surge test |
| Input range, Voltage | 2 kV |
| Input impedance | 1 MW, 30 pF |
| Input range, Current | Built in high current shunt |
| Connection | Fiber optic between the divider & shunt and the PC (Patent pending technology) |
| Computer interface | USB port |
| PC requirement | Any PC with USB port, with Windows XP |
| Price | $ 19,500.-
Mostly from stock |
Installing a system
You can have a calibrated measuring system in 10 minutes.
- Insert Setup CD, the software will be installed automatically.
- Connect fiber optic interface to USB port,
- Type in your existing Voltage divider ratio.
The system is calibrated, and ready to measure.
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Resistive voltage divider&shunt with built-in digitizer
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Specifications | Top of Page |
| Input range, voltage | 200 kV, 300 kV, 400 kV available |
| Input range, current | 14 bit (16384 steps) |
| Sampling rate | 100 MS/sec for Lightning test,
10 MS/sec for Switching surge test |
| Input range, Voltage | 2 kV |
| Input impedance | 1 MW, 30 pF |
| Input range, Current | Dual shunt with options in range of 0.5 A - 500 A |
| Price | $ 29,000.-
Mostly from stock |
The system is factory calibrated. After software installation, the system is ready to measure.
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HIGH VOLTAGE SWITCHES
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| We are manufacturing air or electrically operated high voltage switches. | Top of Page |
400 kV BIL, SPDT Switch is $ 1,500.-
250 kV BIL, SP 8 Position Switch is $ 13,000.-
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DIGITAL IMPULSE RECORDER
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| A typical transformer testing procedure. | Top of Page |
Click to enlarge the pictures
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