HVA28TD VLF/DC Instrument
HVA28TD VLF/DC Instrument
VLF/DC Hipots & Tan Delta Cable Diagnostics
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 HVA28TD Cable Diagnostic Instrument
The smallest VLF /DC unit on the market now includes an integrated Tan Delta measurement system to perform advanced electrical insulation diagnostics. For example, this can be extremely useful when performing advanced diagnostics on cable systems as it provides valuable information as to the condition of the cable insulation and shield. The instrument automatically performs a TD test, stepping up the voltage at the user prescribed levels (according to the IEEE) and stores the results. All test parameters including insulation resistance, capacitance, RMS current and voltage, test durations, voltage steps, tan delta, and standard deviation are all measured and displayed by the HVA28 LCD display or stored to an internal memory. Test results can also be transferred directly to a USB memory stick or wirelessly via Bluetooth to a PC for later analysis and reporting using the supplied industry leading reporting software -TD Control Center. All units are shipped with a calibration certificate, TD Control Center software, corona protection shields, Bluetooth dongle, and an accessories tote.
Features:
- Integrated TD unit
- TD Resolution ±1×10-4
- TD Analysis & Reporting using TD Control Center
- Digital RMS metering
- Smallest unit available
- Bluetooth/USB Mem. stick PC Interface
- Color LCD Display
- Weighs only 31 lbs / 14 kg
- Insulation Resistance & Cap. Measurement
- Perform advanced diagnostics on MV Cables according to IEEE400 and 400.2
- Output Frequency optimization
- Real time oscilloscope display
- Auto & Manual Test Sequences
- Internal Storage of Test Reports
- Unlimited duty cycle
- Flashover voltage detection
- Power supply immunity and independence
- Low maintenance, oil-free design
- RMS Digital Metering of Current and Voltage
Output Modes:
- VLF 20kVrms/28kV Peak output
- DC ±28kV
- Sine/Square/ DC outputs
- Cable Jacket / Sheath testing mode
- TD measurement mode
- Vacuum bottle testing mode
- Fault Conditioning/Trip
- Load independent output waveform
Safety:
- Short circuit detection
- Emergency Off button
- Integrated internal discharge of DUT.
- 12kV power frequency voltage feedback protection
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 |
|
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 |
|
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: | 13ft/4m |
| Weight: | 31lbs / 14kg |
|
Dimensions: Imperial (inches) Metric (mm) |
16.9 x 9.4 x 13.4 430x240x340 |
|
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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