HVA90/94 VLF/DC Instrument

HVA90/94 VLF/DC Instrument

ENERGIZING CLIENTS SINCE 1991

VLF/DC Systems

HVA90 & HVA94 VLF/DC Instruments

The model HVA90 and HVA94 offer customers the ability to test MV and Sub Transmission class cables including 69kV and 46kV cable and below. The lightest 90kV VLF/DC system on the market, this single instrument not only produces some of the highest VLF AC voltages available, but it also has a very powerful output capability. This facilitates the testing of long cables.

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PRODUCT MANUALS & DOWNLOADS

PRODUCT DESCRIPTION

VLF/DC Hipots

From the outset, HV Diagnostics was a pioneer in the development a small, portable, single piece oil free VLF (Very Low Frequency) Hipot test instrument that would be reliable, user friendly and more technically advanced than anything available in the industry. The model HVA30 was developed more than 10 years ago, quickly becoming a game changer in the industry making it the most popular VLF/DC unit on the market.

From those humble beginnings, the HVA Series of combo VLF / DC high voltage test instruments have grown and strengthened, both in voltage and power capabilities, while still maintaining the same unique quality and performance. From the smallest, but still incredibly capable VLF unit on market – the HVA28 – to one of the largest – the HVA200, we now offer a full spectrum of VLF / DC units covering a wide range of power and voltage requirements.

These instruments not only test MV (Medium Voltage) and Transmission class cables, they can also test vacuum bottles, cable jackets / sheaths, motors, generators, transformers etc. A very accurate true RMS measurement system measures and records load capacitance, insulation resistance (Megohmmeter), current, frequency, voltage, breakdown voltage and test duration. The HVA series of VLF instruments form the building blocks for the available Tan Delta and Partial Discharge instruments.

The well-known HVA Control Center Software comes free of charge with all HVA test instruments. Firmware updates are also performed free of charge for the life of the instrument and all new instruments are delivered with a NIST traceable calibration certificate.

 

HV Diagnostics HVA90/94 VLF/DC Test Unit

The model HVA90 and HVA94 offer customers the ability to test MV and Sub Transmission class cables including 69kV and 46kV cable and below. The lightest 90kV VLF/DC system on the market, this single instrument not only produces some of the highest VLF AC voltages available, but it also has a very powerful output capability. This facilitates the testing of long cables. Like all models in the HVA series, the user interface is the same. This means that any operator who is familiar to operating a HVA34 for example, can also operate the HVA90/94. Setup is simple and automatic with no cumbersome interconnecting of various modules. Automatic test sequences, like on all HVA models can be setup directly on the instrument or on the supplied HVA Control Center software. Test reports are downloaded to the instrument’s internal memory or to a USB flash drive.

 

Features:

  • Tests your MV and Transmission cable networks
  • Test up to 10µF (100,000ft/30kms)
  • Single Piece Design
  • Weighs only 280 lbs / 127kg
  • Perform tests fully automatically
  • Real time oscilloscope display
  • RMS Metering of Current and Voltage
  • Output Frequency optimization
  • Insulation Resistance & Cap. measurement
  • Internal Storage of Test Reports
  • Download to PC and / or USB flash drive
  • Unlimited duty cycle
  • Bright backlit LCD display
  • Power supply immunity and independence
  • Low maintenance, oil-free design
  • HVA Control Center – User friendly software for immediate, professional detailed reporting and setup
  • Free HVA Control Center Software and upgrades

 

Output Modes:

  • High voltage 90kV (HVA90) or 94kV output (HVA94)
  • DC ±90/94kV
  • VLF Sinewave / Squarewave & DC outputs
  • Cable Jacket / Sheath testing
  • Vacuum bottle testing
  • Fault Conditioning / Fault Trip
  • Load independent output waveform

 

Safety:

  • Integrated internal discharge of DUT
  • 12kV power frequency voltage feedback protection
  • Flashover voltage detection
  • Remote interlock “kill switch” and HV status indication
  • Short circuit detection
  • Local Emergency off button

 

Specs:

Ordering Information: 709 001
Power Supply/Input Voltage: 110 to 240V AC ±10% (50/60Hz)
Rated Max Output Voltage:
Sinusoidal RMS/Peak
Squarewave
DC
64kV/90kV
90kV
±90kV
Rate Max Output Current:
Sinusoidal RMS
DC/Squarewave
41mA
58mA
Output Frequency (default 0.1Hz): 0.01Hz to 0.1Hz adjustable small increment of 0.01Hz (10 frequencies)
Frequency Optimization: Yes
Maximum Output Load Capability @ maximum voltage and frequency: 1µF
*10 000ft
*3km
Maximum Output Load Capability @ Reduced Frequency and / or voltage: 10.0µF
*100 000ft
*30km
Metering:
Voltage
Current
Capacitance
Resistance
Timing
Fast Arc/Flashover
Waveform
0.1kV Resolution ±1% Accuracy
1 µA Resolution ±1% Accuracy
0.1 nF to 20 µF Range
0.1MΩ to 20GΩ Range
Included and integrated
Detection Included and Integrated
Real time oscilloscope display of actual output voltage waveform
Output Mode (all load independent & symmetrical): VLF AC Sinewave
VLF AC Squarewave
DC (both Positive and Negative Polarity)
Fault Condition Mode / Fault Trip Mode
Vacuum Bottle Test Mode (DC) – optional
Cable Jacket / Sheath Test Mode
Output Duty: Continuous
Computer Interface: RS232 Standard, USB Flash Memory Download Module (optional)
HVA Contol Center Software included with every HVA instrument
Memory / Test Record Storage:
Built in Memory
USB Flash Drive
50 Test Records
Unlimited (see options)
No. of programmable Automatic Test Sequences: 40
Standard HV Test Lead Cable Included: 50ft/15m
Weight: 280 lbs/127kg
Dimensions:
Imperial (inches)
Metric (mm)
26 x 17.5 x 24
650x445x610
Environmental:
Storage
Operating
Humidity
-13°F to 158°F / -25°C to 70°C
23°F to 113°F / -5°C to +45°C
85% RH non-condensing

* Based on typical MV cable. 100pf/ft or 330 pF/m

 

Note: Due to continuous development, the information may change without notice.

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