GR-28TD
The GR-28TD VLF high voltage test set is an ultra-compact lightweight 0.1 Hz VLF cable tester with integrated tan delta diagnostics
- Smallest VLF & TD unit available
- 14 kg only
- Smart VLF technology
- Outputvoltage 28 kV
- IP67 watertight
- Patented cooling system
- Dual Discharge Device (DDD®)
- Leakage Guard
At only 14 kg this ultra light high voltage test set is the smallest unit available on the market and is perfectly suited for mobile use.
The GR-28TD high voltage test set is protected by a watertight, crushproof and dust proof IP67-case.
The strong high voltage output can drive capacitive loadsas high a 10 μF.
Possible output voltages:
- Sinusoidal: 0 – 29 kV peak, 0 – 21 kV eff
- DC: ± 0 – 28 kV
- Squarewave: 28 kV
The GR-28TD offers manual and automatic testing and diagnostic sequences and various operating modes such as:
- VLF cable testing with symmetrical AC-Voltage (load independent across full range)
- DC with positiv or negative polarity
- Burn-/ Fault Condition or Fault Trip Mode
- Jacket / Sheath Testing
- Sheath Fault location mode
The Dual Discharge Device (DDD®) allows electronic and mechanical discharging of devices under test.
The following features make the GR-28TD VLF high voltage test set the outstanding cable test and diagnostic system of its class:
- Predefined standard-compliant cable test sequences
- Symmetrical sine wave at high voltage
- Measurement of the dissipation factor tan δ with an accuracy of ± 1 x 10-4
- Leakage Guard – leakage current correction
- RMS measurement of output voltage and current
- Measurement of capacitive and resistive load
- Automatic load dependent frequency selection (0.01 Hz – 0.1 Hz)
- Display of current test time
- Integrated real-time scope function
- Self-explanatory, multilingual software
- Automatic measurement reporting
- Computer-Interfaces and report storage via USB or Bluetooth
- PC software (b2 ControlCenter) for data analysis and storage
- Flashover detection and ultra fast switch off
- Flashover voltage measurement
- Time optimized burning mode
- No regular maintenance required, due to dry (oil-free) system
- Unlimited duty cycle
The fully comprehensive safety features guarantee protection of operators and test instrument.
- Short circuit protected output
- 12 kV feedback protection
- Signal lamps for active / inactive high voltage
- Status display of safety functions
- Dual Discharge Device DDD®, elektronische und mechanische Entladeeinrichtung (integriert)
- Main switch with key-lock
- Emergency-off button on front panel
A SINGLE VLF high voltage test set for NUMEROUS applications:
- Cables: XLPE , PE, EPR, PILC, etc.
- Capacitors
- Switchgear
- Transformers
- Rotating machines (IEEE 433)
- Isolators
- Bushings
In connection with the PD30-E, the GR-28TD VLF high voltage test set may be expanded into a partial discharge measurement system.