MEGGER HV DAC series TEST AND DIAGNOSTIC SYSTEM FOR HV CABLES

The HV DAC series is designed for after-laying testing on newly installed HV-cables as part of quality control, and for condition assessment on repaired or service-aged HV-cables.

The key benefit of this test set is the compactness versus testable capacity. With this transportable unit, cables with a length up to 32 km can be tested. In addition set-up within a substation is also no problem; no more roadblocks needed compared to using resonance test sets on large trucks.

As of its portability and short set-up time it is possible to quickly respond on changing weather conditions. Because of its low weight there are no special requirements needed for road conditions. Air transport is also no problem, keeping transport times to a minimum and maximising the efficiency in use of the system.

MEGGER HV DAC series TEST AND DIAGNOSTIC SYSTEM FOR HV CABLES Specifications

HV DAC-200

Output voltage

• DAC : 18 … 141 kVRMS / 25 … 200 kV peak
• Precision : ± 1 %
• Resolution :0.1 kV
• Frequency range : 20 Hz … 300 Hz
• Capacity range : 0.035 μF … 8 μF at 200 kVpeak
• Charging current : 20 mA
• PD sensitivity range: 2 pc … 100 nC (acc. to IEC60270)
• System noise level : < 2 pC

PD pulse Rep. rate

• Coupling capacitor :100 kHz20 nF

PD localisation

• Measuring range : 0 … 16,000 m / V/2 = 80 m/μs
• Propagation : 50 … 120 m/μs

velocity v/2

• Sampling rate : 125 MHz (8 ns)
• Band width : 3/25 MHz (switchable)
• Precision : 1 % of the cable length
• Resolution : ± 1 pC / ± 1 m
• Filter : Analog and digital
• Input voltage : 400 V ± 10%, 3 pH, 50/60 Hz, 4 kVA

Temperature

• Operation : 0 °C … 55 °C
• Storage : – 20 °C … 70 °C
• Relative humidity : 93 % at 30 °C (non-condensing)
• IP rating : IP 00
• Weight : app. 1050 kg (incl. flight cases)