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QUALITROL-IRIS POWER IS THE WORLD’S LARGEST PROVIDER OF MONITORING
AND TESTING EQUIPMENT FOR MOTOR AND GENERATOR WINDINGS
Iris Power Epoxy Mica Capacitors (80 pF)
Partial Discharge Sensors for Testing High Voltage
Electrical Equipment
The durable Iris Power Epoxy Mica Capacitors (EMCs) are
designed to detect Partial Discharge (PD) activity in electrical
equipment (AC motors, generators, switchgear and dry-type
transformers) while not imposing on the machine’s operation or
reliability in any way.
Iris Power EMCs are
permanently installed (minimum
one per phase) as close as
possible to the equipment to
be monitored to maximize
sensitivity. In order to improve
noise separation, the Iris Power
EMCs are installed directionally
or differentially, depending on
the equipment.
Iris Power’s 80pF EMCs are
designed to block the 50/60Hz
power frequency and allow only
high frequency (>40MHz) signals
to pass through, be collected
and analyzed by an appropriate
Iris Power portable instrument or
continuous monitor.
PD monitoring is applicable to
diverse equipment installations.
That is why Qualitrol-Iris Power
offers four different voltagerated EMCs – 6.9kV, 16kV, 25kV
and 28kV. The choice of which
couplers to install is dependent
on the operating voltage of the
equipment.
UNIQUE FEATURES
Mica Splittings Dielectric
Iris Power EMCs are safe for use
in operating equipment because
they have excellent electrical
properties due to an 80 mm
(3 inch) layer of epoxy
impregnated mica splittings
as the main dielectric. In
comparison, a typical 13.8kV
stator coil has only about 3 mm
(0.118 inch) thickness of epoxy
mica paper.
Voltage Endurance Testing
Independent voltage endurance
testing (IEEE 1043) proved that
the 16kV Iris Power EMC
withstands over 1000 hours at
30kVrms. According to statistical
methods (IEEE 930-1987), this
translates into 60,000 years of
use at normal operating voltage.
By comparison, the average
13.8kV coil is expected to
withstand only 400 hours of
exposure to 30kVrms. The Iris
Power EMC’s excellent
endurance and thermal stability
is due to the use of mica
splittings, as opposed to mica
paper or ceramics.
Over 40,000 Iris Power Epoxy
Mica Capacitors are in service
around the world, and have
accumulated tens-of-millions of
hours of reliable operation.
Iris Power EMCs are
sold individually or
in coupler kits
complete with all
installation materials
including the
silicone rubber
insulating boot
(EMC boot)
shown here.
Where required,
insulating tapes are
available.
IRIS POWER ON-LINE PRODUCTS
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