VLF CR series
Portable VLF test systems for testing medium voltage cables according to IEC 60502-2 and IEEE 400.2
The portable, high-performance and energy-efficient VLF test systems are used for testing cables with 0.1 Hz cosine-rectangular voltage according to IEC/IEEE/CENELEC standards. In accordance with guidelines, the dielectric strength of cables and joints must be checked after installation or repair.
The VLF test systems from SebaKMT have high test-capacities and are still compact, because of the patented voltage wave-shape and the power-recycling during polarity reversal. Aside from cable and sheath testing, the test systems can also be used for the precise pinpointing of sheath faults (in combination with a step-voltage probe)
• VLF, DC and sheath fault testing in one device
• Portable thanks to two-part construction
• High test capacitance
• Integrated discharge system
• Reporting
• VLF CR-28 up to cable series 15 kV
• VLF CR-40 up to cable series 23 kV
• VLF CR-60 up to cable series 35 kV
• Sheath Testing
• DC Fault Testing
• Pinpointing
Key Features
High test capacity
The systems consist of a control unit and an HV unit. Because of their two-part construction, the systems are easy to transport. One of the advantages of the cosine-rectangular test method is the high test capacitance of up to 5 μF at 0.1 Hz. This test capacitance allows all three phases to be tested simultaneously with the standardized test frequency of 0.1 Hz.
Proven procedure
Using 0.1 Hz cosine-rectangular voltage, weak points in the cable can be safely broken down.
DC testing, sheath fault testing and pinpointing
By switching to DC testing, the cables and connected sub-stations can be tested with negative and positive DC voltage.
Maximum safety
The integrated discharge and breakdown detection systems maximise user safety
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