Medidores de aislamiento - Megohmetros Digitales VDC GigaOhmios 6213-IN SEW manual ingles www.viaindustrial.com
Medidores de aislamiento - Megohmetros Digitales VDC GigaOhmios 6213-IN SEW manual ingles www.viaindustrial.com
IN
S
U
L
A
T
O
R
R
E
S
IS
T
A
N
C
E
RE
SIS
T
AN
CE
DU
ET
O
CO
NT
AM
INA
T
ION
MEASURING AN INSULATOR
When
measuring
insulator,
there
are
a
few
things
to
consider:
1-
Most
insulators
collect
dust
and
get
contaminated
over
time
with
a
mixture
of
Moisture,
rain,
dirt
etc...
2-
These
matters
lower
the
resistance
of
the
insulator
as
they
are
in
parallel
with
the
insulator
resistance.
3-
It
is
recommended
to
measure
the
insulator
first
without
the
guard
to
verify
that
the
total
resistance
is
high.
Should
the
total
resistance
not
be
high,
that
could
mean
that
the
amount
of
dirt
on
the
surface
of
the
insulator
is
too
high
and
therefore,
the
insulator
may
require
cleaning.
4-
Should
your
insulator
require
cleaning,
follow
the
procedures
recommended
by
it's
manufacturer.
5-
For
Final
Test
and
Measurement,
use
the
Guard
so
that
leakage
surface
current
is
collected
and
Insulator
is
intrinsically
tested.
The
insulator
must
not
be
connected
to
any
live
component
or
power
source.
Use
a
tied
copper
wire
around
the
insulator
at
about
its
center
to
connect
the
guard.
FIRST MEASUREMENT
MEASURE
WITHOUT
THE
GUARD
TO
TAKE
EVERYTHING
INTO
ACCOUNT
AND
FIND
OUT
IF
NEED
CLEANING.
DIRTY
INSULATOR
ELECTRICAL
EQUIVALENT
CIRCUIT
DIRTY
INSULATOR
SECOND
MEASUREMENT
MEASURE
WITH
THE
GUARD
TO
ENSURE
INSULATOR
IS
CORRECT.
TYPICAL
TEST
LINE
LINE
LEAKAGE
DUE
TO
CONTAMINATION
LINE
LEAKAGE
GUARD
INSULATOR
INSULATOR
EARTH
EARTH
RESISTANCE
DUE
TO
CONTAMINATION
CAN
BE
VERY
LOW
AND
LOWER
THE
TOTAL
RESISTANCE.
CLEANING
PERIODICALLY
CNA
ALSO
REDUCE
SYSTEM
POWER
CONSUMPTION.
-21-
EARTH
