HV DAC-200 Test and diagnosis system for high voltage cables

HV DAC-200
Test and diagnosis system for high voltage cables
HV DAC-200
Test and diagnosis system for high
voltage cables
■■ Designed for testing and diagnostics
on cables rated up to 132 kV
■■ Multifunctional: cable withstand testing & PD Diagnosis in a single system
■■ Allows a monitored commissioning test acc. to IEC 60840 and IEEE 400.4
■■ Highly adaptable thanks to the portable design
DESCRIPTION
The HV DAC-200 is a DAC (Damped AC Voltage) test set
with a peak voltage of 200 kV. The test set can be used for
acceptance testing on cables rated up to 132 kV according
to the IEC 60840 and IEEE 400.4 standard. Moreover, the
unit can also be used for condition analysis of aged cable circuits.
The system consists of a notebook as a control unit and an
HV part. The HV part contains of an HV source, an electronic
switch and a resonance inductor to generate a damped AC
test voltage. The HV divider and the coupling capacitor for
PD detection and localization are integrated in a sepa-rate
unit.
The main use of the DAC test set is to identify, evaluate and
locate partial discharge (PD) faults in the cable insulation and
accessories of all types of high voltage power cables. PD activity is an indication of incipient faults in the insulation and
is therefore widely regarded as one of the best ‘early warning’ indicators of the deterioration of medium and high voltage insulation.
The operating SW guides the user through the entire process.
Some key features are:
Since the DAC frequency of the test voltage is close to nominal AC service conditions, all measured PD activities can be
effectively evaluated and are comparable with the power
frequency. The PD inception voltage (PDIV) and PD extinction
voltage (PDEV) can be easily determined due to the decaying
amplitude of the test voltage.
Partial discharges are regarded as the main breakdown
cause for HV cables.
Performing offline PD measurements on HV cables using a
DAC voltage helps support the asset management process
so that reliable decisions can be made for maintenance or
replacement activities.
■■Integrated cable data base
■■Fully automatic calibration
■■“Live” PD mapping; evaluation and display of results during
the actual measurement
■■Reporting by mouse click
The individual units are stored in tough transport cases
which also allow for air-transport.
TECHNICAL DATA*
FEATURES AND BENEFITS
■■High testable capacity
HV DAC-200
Output voltage
DAC
18 … 141 kVRMS / 25 ... 200 kVpeak
Precision
± 1 %
Resolution
0.1 kV
Frequency range
Capacity range
Charging current
PD sensitivity range
Resolution
System noise level
PD impulse repetition
rate
PD localisation
Measuring range
Propagation
velocity
Sampling rate
Bandwidth
Precision
Resolution
Filter
Input voltage
Temperature
Operation
Storage
Relative humidity
IP rating
Weight
Components
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
■■Transportable and compact
■■Short set-up times allowing to response quickly on changing weather conditions
20 Hz ... 300 Hz
0.035 µF ... 8 µF at 200 kVpeak
20 mA
2 pc … 100 nC (acc. to IEC60270)
± 1 pC
< 2 pC
100 kHz
■■Automatic PD measurement with live evaluation
■■Low space requirements allowing to set-up even in small
substations
■■Low power consumption
0 … 16,000 m / V/2 = 80 m/µs
5 … 120 m/µs
125 MHz (8 ns)
3/25 MHz (switchable)
1 % of the cable length
± 1 pC / ± 0.1 m
SCOPE OF DELIVERY
■■HV DAC-200 incl. flight cases
■■Laptop and software license
Analog and digital
400 V ± 10%, 3 pH, 50/60 Hz, 4 kVA
■■PD Calibrator
■■HV connection tube 5 m (DN 100)
- 20 °C … 55 °C
- 20 °C … 70 °C
93 % at 30 °C (non-condensing)
IP 00
app. 950 kg (incl. flight cases)
■■Mains cable, grounding cables and control cables
■■Operating manual
HV source
HV switch
HV coil (3 modules)
HV divider / PD analyzer
Accessory box 1
ORDERING INFORMATION
Product
Order no.
HV DAC-200
1006485
Options:
HV connection tube DN 100 5 m
2006462
HV connection tube DN 100 7,5 m
2006461
HV connection tube DN 100 10 m
2006463
Accessory box 3 (for additional HV connection tubes up to 10 m (DN 100))
* We reserve the right to make technical changes.
SALES OFFICES
Megger GmbH
Obere Zeil 2
D-61440 Oberursel
Germany
T 0049 6171 92987-0
Einfo@megger.de
HVDAC200_DS_EN_V01
Seba Dynatronic
Mess- und Ortungstechnik GmbH
Dr.-Herbert-Iann-Str. 6
96148 Baunach
Germany
T 0049 9544 68-0
Eteam.international@megger.de
www.megger.com
ISO 9001
The word ‘Megger’ is a registered trademark.
2
90014144
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