Vertical bands in photo are an artifact
of camera exposure and screen update, the
screen looks great to the eye
The E and I inputs may be used to measure
a voltage, a current and the phase angle
(I lag E). The meter also calculates and
displays Watts, Vars, Voltamps and Power
Factor. The CTMP offers metering functions
designed to perform "in service" or "load"
testing of power system meter and relay
circuits. Voltage and current measurement accuracy
is +/- 0.4%. Angle measurement is 0-360 degrees,
resolution 1 degree, accuracy +/- 1 degree. Voltage
input range is 0-150 VAC, current range 0-6 A.
These ranges are optimized for connection to typical
PT and CT secondary circuits. The CTMP now offers,
in addition to the hardwire input, a clamp probe
input that provides for current measurement
when a meter jack is not available. This input also enhances
safety by eliminating the possibility of opening a
CT during test activity. Current range when using the
supplied Fluke i200s clamp-probe is 0-10 amps and
measurement accuracy is
1.5%. Other clamp probes may be used and current measurement
to several thousand amps is available.
The screen and functionality while using the
clamp on are identical to the hardware selection.
A menu allows selection of the current measurement input.
The clamp on permits the measurement of two currents
and is convenient for commissioning tests of differential
relays. In the picture above I1 is the current measured
by the "duckbill" or "hardwire" probe connected to the
I1 binding posts. CL is the current measured by the clamp
on. The angle is the angle between the currents.
The unit allows measurement of ratio and polarity of
energized CT's installed in low voltage equipment. The
Clamp on used for this test is the standard Fluke I200S
set to the 10MV/A range allowing measurement of primary
current from 1 to 100AMPS.The I1 input is connected to
the CT secondary
using a "duckbill" metering probe. The unit measures the
two currents, displays the angle and calculates the ratio
to 5. The unit may be ordered with optional clamp probes
for primary currents to 1000 amps and is delivered calibrated
to the probes you order.