MV DAC-30 Test and diagnosis system for medium voltage cables
The MV DAC-30 is a DAC (Damped AC Voltage) test set with a peak voltage of 30 kV. The test set can be used for quality control on newly installed cables, in accordance with the IEEE 400.4 standard. In addition, to prevent unplanned outages, the unit can also be used for condition-monitoring purposes on aged cable circuits.
The main use of the DAC test set is to identify, evaluate and locate partial discharge (PD) faults in the insulation and accessories of all types of medium voltage power cables. PD activity is an indication of incipient insulation faults and is therefore widely regarded as one of the best ‘early warning’ indicators of deteriorating medium and high voltage insulation.
Partial discharges are regarded as the main breakdown cause for MV and HV cables. Performing offline PD measurements on MV and HV cables using a DAC voltage test set helps support the asset management process so that the correct decisions are made for future maintenance and re-placement activities.
Since the DAC frequency of the test voltage is close to nominal AC service conditions, all measured PD activities can be accurately evaluated and compared with the power frequency. The PD inception voltage (PDIV) and PD extinction volt-age (PDEV) can be easily determined due to the decaying amplitude of the test voltage.
The system consists of two parts: the control unit (including laptop), and the HV unit. The HV unit divides in two, making transport and set-up much easier. One of the unique features of the MV DAC-30 is that the HV unit consists of a voltage source with an internal PD detector. Unlike with other PD measurement systems, the cable under test is the only accessible live component when testing with the MV DAC-30, making it much safer.
The operating software guides the user through the entire process. Some key features are:
■Integrated cable database
■Fully automatic calibration
■Live PD mapping: evaluation and display of results during the actual measurement
■Reporting by mouse click
●FEATURES:
■Safe-to-touch, enclosed metallic casing
■Internal PD Detector
■"Live" evaluation and display of results
■Two part design for easy transportation
■Conforms to VDE safety standards
■High test capacity
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MV DAC-30 、 1006132-S 、 2006817 、 2008839 、 2008840 、 90017826 、 90017827 |
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Test and diagnosis system 、 DAC (Damped AC Voltage) test set |
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2020/04/02 |
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MVDAC30_DS_EN_V01 |
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209 KB |
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