About us Products Contact us

USA

Danbury, CT

HUNGARY

Budapest

 About us

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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.

 Products

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IMPULSE GENERATOR

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.


    IG-200

Model NoLITTLE GIANT Top of Page 
DescriptionLightning strike 1.2/50 microsec. 200 kV Impulse Generator is portable, weights only 50 lbs, capable to test switchgears, circuit breakers, distribution transformers.
Features5 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 Supply115V 3 Amps
Size28” H x 16” W x 10” D
WeightsOnly 50 lbs [ 23 kg ]
IncludingOwon 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
Click here for more information
 
 
 

    IG-300

Model NoIG-300 Top of Page 
Description300 kV 6 kJ complete impulse generator
FeaturesCompact 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.
Size
Capacitor Bank and Power Supply26¼W 56¼H 40¼D
Controller19¼W 51¼H 12¼D
IncludingCapacitor bank,
Remotely controlled reversible power supply,
Wave forming resistors,
Voltage divider,
Preload capacitor,
Digital controller,
All cables
Capacitor Bank and Power Supply
Main Supply115V or 240V 20 Amps Standard outlet
Price$ 46,000.-
Available from stock, FOB Danbury or Budapest
 
 
 

    IG-400

Model NoIG-400 Top of Page 
Description400 kV 8 kJ complete impulse generator
FeaturesCompact 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.
Size
Capacitor Bank and Power Supply30¼W 75¼H 40¼D
Controller19¼W 51¼H 12¼D
IncludingCapacitor bank,
Remotely controlled reversible power supply,
Wave forming resistors,
Voltage divider,
Preload capacitor,
Digital controller,
All cables,
Capacitor Bank and Power Supply.
Main Supply115V or 240V 20 Amps Standard outlet
Price$ 54,000.-
Delivery 5 weeks, FOB Danbury or Budapest
 
 
 

    IG-500

Model NoIG-500 Top of Page 
Description500 kV 2 kJ complete impulse generator
FeaturesCompact 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.
Size
Capacitor Bank and Power Supply30¼W 87¼H 40¼D
Controller19¼W 51¼H 12¼D
IncludingCapacitor bank,
Remotely controlled manually reversible power supply,
Wave forming resistors,
Voltage divider,
Preload capacitor,
Digital controller,
All cables,
Capacitor Bank and Power Supply.
Main Supply115V or 240V 20 Amps Standard outlet
Price$ 58,000.-
Delivery 5 weeks, FOB Danbury or Budapest
 
 
 

    IG-1200

Model NoIG-1200 Top of Page 
Description1200 kV 40 kJ complete impulse generator
Price$ 198.000,-
Delivery 12 weeks, FOB Danbury or Budapest
 
 
 

DIGITAL CONTROL FOR IMPULSE GENERATOR

    DC-1

Model NoDC-1 Top of Page 
DescriptionDigitally controls every function of the impulse generator. It works with any impulse generator.
FeaturesPolarity Switch
Output Voltage dial
Full / Reduced (Actual impulse voltage) wave switch
 
 
 

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.
 
 
 

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

    Digitizer without divider

Specifications

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ApplicationsLightning and Switching surge tests
Resolution, Vertical14 bit (16384 steps)
Sampling rate100 MS/sec for Lightning test,
10 MS/sec for Switching surge test
Input range, Voltage2 kV
Input impedance1 MW, 30 pF
Input range, CurrentBuilt in high current shunt
ConnectionFiber optic between the divider & shunt and the PC (Patent pending technology)
Computer interfaceUSB port
PC requirementAny 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.



    Resistive voltage divider&shunt with built-in digitizer

Specifications

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Input range, voltage200 kV, 300 kV, 400 kV available
Input range, current14 bit (16384 steps)
Sampling rate100 MS/sec for Lightning test,
10 MS/sec for Switching surge test
Input range, Voltage2 kV
Input impedance1 MW, 30 pF
Input range, CurrentDual 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.
 
 
 

HIGH VOLTAGE SWITCHES

  
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.-
 
 
 

DIGITAL IMPULSE RECORDER

  
A typical transformer testing procedure. Top of Page 
click to enlarge click to enlarge click to enlarge click to enlarge
Click to enlarge the pictures

 
 
 

Contact us

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FACILITIES

  

Manufacturing USA

ContactAladar Kohalmi, High Voltage Instruments
Tel+1 (203) 792-9752
Fax+1 (203) 792-2626
Email
Address9, Jansen st., Danbuty, CT 06810 - USA
 

  

Manufacturing EU

ContactAladar Kohalmi, High Voltage Instruments
Tel+1 (203) 748-7731
Fax+1 (203) 792-2626
Email
AddressBláthy Ottó u. 34., Budapest, 1089 - HUNGARY
 

  

Sales and Commissioning service

ContactJeremy Guardado / MESSERSTROM, INC.
Tel+1 (314) 395-9003 Ext. 100
Fax+1 (314) 395-9004
Email
AddressP.O. Box 31758, St. Louis, MO 63131 - USA