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The harmonic filter models available are:
016SA6788Gl
016SA6788G2
Only one filter is required for each N BV relay.
shown in Figure 14 and connected across terminals 3-4 of the N BV relay, as
shown in Figure 12.
2.
Pickup test
Connect a single-phase source of voltage to the relay as shown in Figure 10, and
check
that
the
CHARACTERISTICS.
adjusting resistor R2.
If after the
ACCEPTANCE
job site,
it is
under the section on
Before any electrical tests are made, the relay should be in its case, mounted in a
vertical position, preferably in its final location.
The balanced three-phase test described under the section on
be repeated if a suitable three-phase source is available.
the relay pickup should be checked, and adjusted as desired by changing the Resistor
R2 setting.
In view of the vital role of protective relays in the operation of a power system,
it is important
that
interval between periodic checks will vary depending upon environment, type of relay
and the user's experience with periodic testing.
experience
enough
requirements, it is suggested that the points listed below be checked at an interval
of from one to two years.
The tests recormnended under the section on
intervals as described above.
adj usting the Rl and R2 settings as previously described.
1.
For cleaning relay contacts, a flexible burnishing tool should be used.
consists
of
resembling in effect a superfine file.
that no scratches are left, yet it will clean off any corrosion thoroughly and
rapidly.
The flexibility of the tool ensures the cleaning of the actual points
of contact.
clean relay contacts .
60 hertz
SO hertz
pickup
agrees
with
The voltage required to pick up the relay can be changed by
INSTALLATIOB PROCEDUllK
the relay is held in storage be fore shipment to the
TESTS
recormnended that the visual and mechanical inspection described
ACCEPTANCE TESTS
PERIODIC CHECKS AND ROUTINE MAIRTENANCE
a
periodic test program be followed.
to
select
the
test
The relay pickup and balance can be adj usted by
a
flexible
strip
Do
not use knives, files, abrasive paper or cloth of any kind to
GEI-50261
the
values
be repeated before installation.
Until the user has accumulated
interval
best
ACCEPTANCE TESTS
of
metal
with
an
The polishing action is so delicate
10
The filter is mo�nted as
given
in
the
section
ACCEPTANCE TESTS
After the balance test,
It is recognized that the
suited
to
his
should be repeated at
etched-roughened
on
should
individual
This
surface,
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