VLF CR-80 kV test system
High-performance VLF test system
for up to 46 and 66 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-80 kV test system can be used to
test cables with 3 U
o
with operating voltage levels up to 46 kV.
The system consists of a control unit and an HV unit. The high
test capacity of 2.5 μF allows to simultaneously test all three
phases with the standardized 0.1 Hz test frequency. Positive
and negative DC testing of cables and connected switchgears
can be carried out by switching over 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 break-down. The benefits of the
VLF method with 0.1 Hz cosine-rectangular voltage have been
confirmed by extensive scientific research as well as
practical field tests. The proven voltage is recommended by
Cenelec 620/621, IEC 60502-2 and IEEE 400.2 standard.
■
Test with 3 U
o
for 46 kV cables or 2 U
o
for
66 kV cables
■
Can function as a stand alone system or be
integrated into the Centrix Test Van
■
Ideal for standard compliance testing of
long cables such as submarine cables
■
Reporting, breakdown recognition and
leakage current measurement
■
Integrated discharge system
DESCRIPTION
The VLF CR-80 kV test system can be used as stand-alone
system (permanently installed in a transportation container
for operations such as cable testing on offshore wind-farms) or
fully integrated into a test and fault location system. The
integrated safety system and breakdown recognition software
maximise safety.
Furthermore, the leakage current measurement enables a
qualitative assessment of the cable cable, and the protocol
function allows test data to be 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-80_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
TECHNICAL DATA*
VLF 80 kV
0.1 Hz VLF operation Base Plus
Wave shape Cosine-Rectangular
Output voltage 0 … 80 kV
rms
0 … 80 kV
rms
Output current 0 … 12.5 mA 12.5 mA @ 80 kV
(resolution 10 μA)
Frequency 0.1 Hz
Testable cable
capacitance
2.0 μF @ 0.1 Hz
and 80 kV
RMS
2.5 μF @ 0.1 Hz
and 80 kV
RMS
DC operation
Output voltage 0 … - 80 kV 0 … ± 80 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
ORDERING INFORMATION
Product (please contact local representative or factory for detailed offer) Order no.
VLF CR-80 basic or plus installed in a van n.a.
VLF CR-80 basic or plus installed in a trailer n.a.
VLF CR-80 basic or plus installed in a container (on-/offshore) n.a.
FEATURES
■
Ideal for testing long 36/45 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 VLF CR-80-B VLF CR-80-P
10 kV XLPE cable U
t
= 18 kV
RMS
Single phase 36 km
Three phase 12 km
Single phase 60 km
Three phase 20 km
20 kV XLPE cable U
t
= 36 kV
RMS
Single phase 18 km
Three phase 6 km
Single phase 30 km
Three phase 10 km
36 kV XLPE cable U
t
= 60 kV
RMS
Single phase 12 km
Three phase 4 km
Single phase 18 km
Three phase 6 km
45 kV XLPE cable U
t
= 78 kV
RMS
Single phase 9 km
Three phase 3 km
Single phase 11 km
Three phase 3,6 km
66 kV XLPE cable U
t
= 76 kV
RMS
U
t
= 2 U
o
Single phase 10 km
Three phase 3,3 km
Single phase 12 km
Three phase 4 km