Atec Megger-MRCT - Manual

MRCT
Megger Relay and Current Transformer Test Set
■ ■ Industry leading test duration using patented
simultaneous multi-tap measurements reduces
testing time by 20% on multi-tap CT’s
■ ■ Increased measurement accuracy to support
metering class CT testing
■ ■ Smallest and lightest 2 kV secondary voltage
injection unit on the market
■ ■
Integrated single phase relay test system
■ ■ General purpose substation secondary circuit
testing with 300 V & 60 A generators
■ ■
Grouped testing: demagnetization, knee
points, ratios, saturation curves, and more
■ ■ Measure all ratio’s and saturation curves on
multi-tap CT’s with one lead connection
■ ■ Built-in insulation resistance testing
DeSCrIpTIon
The Megger MRCT is a light weight, robust, portable unit
used to perform demagnetization, ratio, saturation, winding
resistance, polarity, phase deviation, and insulation tests on
current transformers. The MRCT automatically calculates ratio
errors, saturation curves, and knee points. The MRCT provides a
microprocessor-controlled variable voltage and current output and
precision instrumentation for automatically testing single and multi
ratio CTs, reducing testing time and increasing productivity. The
MRCT will directly connect to multi ratio CT’s and perform all tests –
saturation, ratio and polarity, winding resistance and insulation – on
all taps with the push of a button and without changing leads.
The MRCT can be controlled
via Megger’s Smart Touch
View Interface (STVI)
controller. The STVI controller
is a full color, high resolution,
LCD touch screen which
allows the user to perform
manual and automatic testing
quickly and easily using the
manual test screen, as well
as using pre-constructed
test routines. The large color
display permits the user to easily read all pertinent data while the
test is being performed and provides the ability to view the current
transformer’s saturation curve. The unit can also be configured to
come without a Megger STVI and can be controlled via a laptop
with Megger’s PowerDB software.
MrCT
Megger relay and Current Transformer Test Set
Current transformers can be tested in their equipment
configuration, such as being mounted in transformers, oil circuit
breakers or switchgear. It is necessary for the equipment to be
completely isolated from the electrical system prior to testing.
ApplICATIonS
Saturation Test
With the single push
of a button, the
MRCT performs a
CT saturation test
and calculates the
rated knee point. The
saturation test can be
performed at frequency
of 50 or 60 Hz up to
2,000 volts as required
by IEC regulations.
The MRCT will calculate the rated knee point in compliance with
IEEE C57.13.1, IEC 60044-1 or IEC 60044-6 on both standards as
well as of specialized CTs such as PX, TPS, TPX, TPY and TPZ. While
the saturation test is being performed, the MCRT will plot the CT
saturation curve on the STVI display and automatically provide the
user with the rated knee point per the desired IEEE or IEC standard.
Many substations CTs include a multi-ratio secondary; therefore the
MRCT has the ability to plot and simultaneously display up to 10 CT
saturation curves.
ratio, polarity Test
Ratio testing can be performed by using the MRCT. The method
used by the MRCT compares a voltage applied to the secondary
winding to the resulting voltage produced on the primary winding.