VLF CR-60-HP test system
High-performance VLF test system
for 36 kV rated cables
This high-performance 0.1 Hz VLF test system for cables with
cosine-rectangular voltages works in accordance with VDE, IEC
and IEEE-standards.
According to most standards and regulations cable circuits
must be tested after installation, after repair or for mainte-
nance purposes. The VLF CR-60-HP test system can be used to
test cables with operating voltage levels up to 36 kV. The
system consists of a control unit and an HV unit. The high test
capacity of 6.5 μF allows to simultaneously test all three
phases with a standardized 0.1 Hz test frequency. Positive and
negative DC testing of cables and connected switchgears can
be carried out by switching to DC Mode. Aside from cable and
sheath testing, the system can also be used to precisely
pinpoint sheath faults (in combination with a step voltage
probe like the ESG NT).
Using 0.1 Hz cosine-rectangular voltage, weak spots in the
cable can be safely brought to a break-down. The benefits
of the VLF method with 0.1 Hz cosine-rectangular voltage
have been confirmed by multiple studies and practical field
tests. The proven voltage is recommended by the Cenelec HD
620/621, IEC 60502-2, and IEEE 400.2 standard.
■
Ideal for standard compliant testing of
long cables such as submarine cables in
offshore wind farms
■
Reporting, breakdown detection and
leakage current measurement
■
Integrated discharge system
DESCRIPTION
The VLF CR-60-HP test system can be used both as a stand
alone system (permanently installed in a transportation
container for operations such as cable testing on offshore
wind-farms) or integrated into a test van system. The
integrated safety system and breakdown recognition software
maximise safety.
Furthermore, the leakage current measurement enables a
qualitative assessment of the cable, and the protocol function
allows test data to be printed and stored for further reporting
purposes.
Testable capacities
SALES OFFICE
Megger Germany GmbH
Dr.-Herbert-Iann-Str. 6,
D-96148 Baunach
T +49 9544 68-0
E team.international@megger.com
VLF_CR-60-HP_DS_EN_V02
www.megger.com
ISO 9001
The word ‘Megger’ is a registered trademark
* We reserve the right to make technical changes; ** Depending on position of HV output;
ORDERING INFORMATION
Product (please contact local representative of factory for detailed offer) Order no.
VLF CR-60-HP installed in a van n.a.
VLF CR-60-HP installed in a trailer n.a.
VLF CR-60-HP installed in a container (on-/offshore) n.a.
TECHNICAL DATA*
VLF CR-60-HP
0.1 Hz VLF operation
Wave shape Cosine-Rectangular
Output voltage 0 … 60 kV
RMS
Output current 0 … 17 mA (resolution 10 μA)
Frequency 0.1 Hz
Testable cable capacitance 6.5 μF @ 0.1 Hz and 60 kV
RMS
DC operation
Output voltage 0 … ± 60 kV
Breakdown recognition Integrated
Leakage current
measurement
Integrated
Reporting Integrated
Sheath fault pinpointing 0 … 10 kV / Duty cycle 1:3, 1:5, 1:9
Input voltage 115 V / 230 V ± 10 %, 50 / 60 Hz,
1900 VA
Dimensions (W x H x D) 1350 x 1250 x 1100 (1500**) mm
Weight 380 kg
Protection class IP 20
Operating temperature - 25 °C … + 55 °C
Storage temperature - 40 °C … + 70 °C
FEATURES
■
Ideal for testing long 36 kV submarine cables
■
High test capacity
■
Maximises user safety through automatic discharge of the
test object and earth loop monitoring
■
Breakdown recognition
■
VLF, DC and sheath fault pinpointing in one device
MAXIMUM TEST LENGTH
10 kV XLPE cable, U
t
= 18 kV
RMS
Single phase 84 km
Three phase 28 km
20 kV XLPE cable, U
t
= 36 kV
RMS
Single phase 45 km
Three phase 15 km
36 kV XLPE cable, U
t
= 60 kV
RMS
Single phase 27 km
Three phase 9 km