HVA28 VLF/DC Instrument
HVA28 VLF/DC Instrument
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 HVA28 VLF/DC Test Unit
The HVA28 is the smallest, lightest VLF/DC test instrument on the market. It is about as small as you can make it! Do not let its compact size lead you to believe this unit is lacking in power. The instrument can test up to 100,000ft/30kms of cable (at reduced voltage and frequency). In addition to cables, this unit can test vacuum bottles, transformers, motors / generators, cable sheath/shields, etc. The patented cooling system and rugged molded case design makes this unit almost completely water proof. With a 28kV output, it can test all your 15kV rated cables and below according to IEEE400.2. Preconfigured and customizable automatic test sequences allow operators to perform accurate testing in the field. This minimizes mistakes and avoids unnecessarily over or under-stressing the electrical apparatus being testing. An easy to use, menu driven, color LCD display allows the user to quickly and effortlessly perform testing in day or nighttime environments. All units come with free HVA Control Software and a calibration certificate.
Features:
- Weighs only 31 lbs / 14 kg
- Smallest unit available
- Extremely rugged and portable
- Insulation Resistance & Cap. measurement
- HVA Control Center – User friendly software for immediate, professional detailed reporting and setup
- Auto & Manual Test Sequences
- Computer interface via Bluetooth or USB
- Power supply immunity and independence
- Color LCD display
- Output Frequency optimization
- Real time oscilloscope display
- Internal Storage of Test Reports
- Download to PC and / or USB flash drive
- Unlimited duty cycle
- Flashover voltage detection
Output Modes:
- VLF 20kVrms/28kV pk output
- Sinewave/Squarewave & DC output
- Cable Jacket / Sheath testing
- Load independent output waveform
- Vacuum bottle testing
- Fault Conditioning / Fault Trip
Safety:
- Integrated internal discharge of DUT.
- 12kV power frequency voltage feedback protection
- HV Plug interlock
Specs:
| Ordering Information: | 702 001 |
| Power Supply/Input Voltage: | 110 to 240V AC ±10% (50/60Hz) |
| Input Power Requirements: | 400VA |
|
Rated Max Output Voltage: Sinusoidal RMS/Peak Squarewave DC |
20kV/28kV 28kV ±28kV |
|
Rate Max Output Current: Sinusoidal RMS DC/Squarewave |
20mA 28mA |
| 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: | 0.5µF *5000ft *1.5km |
| 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 5GΩ 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: | USB Flash & BT HVA Contol Center Software included with every HVA instrument |
| Weight: | 31lbs / 14kg |
|
Dimensions: Imperial (inches) Metric (mm) |
16.9 x 9.4 x 13.4 430x240x340 |
| Standard HV Test Lead Cable Included: | 13ft/4m |
|
Memory / Test Record Storage: Built in Memory USB Flash Drive |
50 Test Records Unlimited (see options) |
| No. of programmable Automatic Test Sequences: | 40 |
|
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
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