Mirus LINEATOR, Installation, Operation And Maintenance Manual, Page: 9 / 20

L
INEATOR
™
Operation & Maintenance Manual
AUHF-M001-A15 3
3.4 Grounding
Consideration must be given to equipment
grounding (case and core) and must be made in
accordance with all applicable electrical codes.
4.0 Storage
Condensation and moisture absorption must be
prevented during storage. The
Lineator™ must
be stored in a warm, dry location. Ventilation
openings should be covered to keep out dust. If
outdoor storage cannot be avoided, the
Lineator™
must be protected to prevent entrance of water,
moisture and foreign material.
5.0 Maintenance
Caution:
Before entering or working on the
Lineator™
,
it should be de-energized, properly
grounded and isolated. Only qualified service
technicians should be allowed to maintain the filter.
While servicing the Lineator, all relevant safety
standards must be followed, including all
applicable electrical codes and NFPA 70E –
Standard for Electrical Safety in the Workplace.
5.1 Periodic Inspection and Maintenance
The Lineator™ has no moving or active parts and
therefore requires only minimal periodic
maintenance when installed in a clean and well
ventilated environment. Annual maintenance is
recommended. This should include:
5.1.1 Visual inspection for evidence of loose
connections, dirt, moisture, rusting,
corrosion, and deterioration of the
insulation, varnish or paint.
Observations should be made for signs of
overheating and overvoltage creeping.
Corrective measures should be taken as
necessary
.
5.1.2 For early detection of any developing
hotspots, an infrared scan can be
performed while the Lineator™ is
operating under its heaviest load
condition.
5.1.3 Lineator™ capacitors are equipped with
an internal ‘Tear-Off’ fuse pressure
interrupter to prevent explosive failure. At
the end of its service life, pressure within
a capacitor will build due to the release of
gases as its dielectrics breakdown. The
covers on the cans are designed to
expand or bulge and Tear-Off the internal
fuse as this pressure builds. Capacitors
should be inspected regularly and
replaced when found to have an
expanded cover.
5.1.4 Even though they may appear fine
physically, capacitors may require
replacement if their capacitance value
has degraded significantly. With the
Lineator de-energized and locked out,
pull capacitor fuses and measure the
capacitance of each capacitor. If this
value indicates a drop in capacitance of
more than 5%, the capacitor should be
replaced.
Caution: Ensure that power to the Lineator™ has
been turned off and safely isolated before
replacing failed capacitors.
5.1.5 Most Lineators™ are also equipped with
capacitor fuses. Capacitor fuses are
intended to provide additional protection
against overloading of the capacitors and
upstream reactor. A blown fuse can be
detected by checking for illumination of
the blown fuse indicator when this option
has been purchased or by testing for
conductivity. If the blown fuse indicator is
on or the fuse is open, it should be
replaced.
Caution: Ensure that power to the Lineator™ has
been turned off and safely isolated before
replacing blown fuses.
5.1.6
Measuring the current in each of the 3
phases of the capacitor circuit can be
another method of determining the
condition of the capacitors. The
capacitors can be assumed to be in good
operating condition when all 3 phases
carry approximately the same amount of
load current. Measurements should be
taken at the input to the capacitor
distribution block and can be done at any
loading condition. Phase currents that are
imbalanced by more than 10%, indicate a
capacitor failure or blown fuse. When the
filter capacitor bank has been connected
in a wye configuration (ie. two jumpers
create a common point on each set of
three capacitors), locating the problem
capacitor(s)
can be achieved by
measuring the voltage between the
common neutral point of each set to
ground. If the voltage difference is greater
than 10V, at least one of the capacitors in
that set has failed or has a blown fuse.
Testing should be conducted annually or
whenever the unit seems to be operating
in an abnormal manner.