Megger VLF SIN-45 User Manual

Operating Modes
31
5 Operating Modes
5.1 Cable Testing
If the VLF SIN-45 is operated without the optional VLF CR Test Boost, the following
cable test operating modes have been combined in their own submenu, which can be
called up directly from the main menu by selecting the menu item .
Menu item Operating mode
>>
Cable test with VLF sine wave voltage of up to 45 kV
PEAK
>>
Cable test with trapezoidal AC voltage (rectangular voltage) of up to 45 kV
Cable test with VLF sine wave voltage and simultaneous tanDelta
diagnosis (optional)
Cable test with positive and negative DC voltages of up to 45 kV
With the optional VLF CR Test Boost connected, tests can only be performed with
VLF cosine rectangular voltage of up to 40 kV. This operating mode can be access
directly through the menu item when in the main menu. Due to the high testable
cable capacitance, this operating mode is also suitable for norm-compliant testing of
very long cables.
The phases and the test voltage are automatically queried when entering the operating
mode, however − like all other settings − they can be adjusted until the actual start of the
test.
The following test parameters can be set:
Button /
Menu item
Description
The phase selection (see page 28) must be carried out in accordance with
the actual type of connection.
If to save time several phases are to be tested at the same time, the
phase selection menu also makes it possible to select several phases.
Thereafter, the phase selection menu must be closed using the function
button .
Entering test voltage.
The manner of the entry may also be specified (see the description in the
bottom part of the table). If the voltage is shown as a multiple of the cable
nominal voltage Uo, then Uo and the factor must be entered successively.
Suitable voltage values for a meaningful cable test are set out in the table
on the following page.
The test time is shown in minutes. After expiry of the test time, the high
voltage will be automatically switched off.
Suitable test times for a meaningful cable test are set out in the table on
the following page.
The setting activates the continuous operation mode.
Selecting the operating
mode
Setting the test
parameters

Megger VLF SIN-45 Specifications

General

Brand	Megger
Model	VLF SIN-45
Category	Test Equipment
Language	English