VLF CR series

Cosine rectangular VLF cable test systems for testing medium voltage cables according to IEC 60502-2 and IEEE 400.2

The VLF CR-28, VLF CR-40, and VLF CR-60 are portable, high-performance, and energy-efficient cosine rectangular VLF cable test systems.

Design for testing cables with 0.1 Hz cosine-rectangular voltage according to IEC, IEEE, and CENELEC standards, these test systems are ideal for testing the dielectric strength of cables and joints after installation or repair.

These test systems have high test capacities and yet manage to be 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).

There are three portable systems available, each with different voltage levels (28, 40, and 60 kVrms):

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

Portable, high-performance, and energy-efficient Cosine rectangular VLF cable test systems

• VLF, DC and sheath fault testing in one device
• Portable thanks to two-part construction
• High test capacitance
• Integrated discharge system
• Reporting

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

Other Products

QUASAR

Three Phase Industrial Grade Protective Relay Test Set with cloud technology

Powerful and flexible

4 x 300V + 3 x 60A outputs, switchable to 7 current outputs
6 binary inputs + 4 binary outputs
External DC current and voltage measurement
6 low-level outputs to test sensors, meters etc, and to upgrade with more channels
Integral Wi-Fi, Ethernet LAN, dedicated IEC-61850 port and Expansion port
Field serviceable

Rugged and portable

19.5 kg (43 lb)
Integral ABS casing with wheels and extensible handle. No separate travel case needed.

Familiar User Interface

Conduct quick or pre-configured tests directly from your tablet or smartphone
Connect to your Windows computer for automated, exhaustive testing

VLF SIN 62

VLF sine wave test system for medium voltage cables with integrated Tan Delta

Performs cable withstand testing, cable diagnosis, and sheath fault pinpointing
Smallest and lightest unit on the market in its class
Unique user-experience, thanks to a large, colour touch screen
Automatic result interpretation as per latest IEEE 400.2 standard
High safety, thanks to its analogue residual voltage indicator

TDM 45

High power test and diagnosis combination for MV cables (Tan Delta, VLF and PD)

Cable testing, cable diagnosis, and sheath testing in one device
Enables standard compliant high power VLF testing at 0.1 Hz (5 µF at 40 kV RMS)
Internal tan delta measurement with automatic result interpretation
Partial discharge diagnosis using VLF sine wave, damped AC or 50/60 Hz slope technology voltages