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ANALOG
INSULATION TESTER |
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| NIPPEN
Insulation Testers are used for direct reading
of insulation resistance of electrical rotating
machines, power distribution lines, communication
cables, insulators, control and switching equipment
etc.
They
are robust instruments, incorporating a built-in-hand
driven generator and a solid-state circuit for
a stabilized D.C. output.
NIPPEN
Insulation Testers meet the requirements of Indian
Standard Specifications IS.2992-1987 for Insulation
resistance measuring instruments.
These instruments are supplied in two types of
cases :
(i)
An injection moulded ABS plastic case, where the
unique geometry of the cabinet makes it practically
unbreakable due to accidental falls and bumps.
(ii) A sturdy and elegant Aluminum cast case with
carrying handle which makes the instrument conveniently
portable. It has two sections and is dust free.
The rotary magnet type generator runs smooth with
minimum noise because of the excellent dynamic
balance of rotating parts.
|
(ABS.
Body) |
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(Metal
Body) |
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Model
|
Rated
Voltage/Rated Resistance
|
Effective
Measuring Range
|
Application
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NITA/NITM
''
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100
V/10 Mohms
100 V/20 Mohms
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0.01-10
Mohms
0.02-20 Mohms
|
Low
Tension power line |
|
''
''
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250
V/20 Mohms
250 V/50 Mohms
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0.02-20
Mohms
0.05-50 Mohms
|
Communication
cable, low tension power line etc. |
|
''
''
''
''
''
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500
V/50 Mohms
500 V/100 Mohms
500 V/200 Mohms
500 V/500 Mohms
500 V/1000 Mohms
|
0.05-50
Mohms
0.1-100 Mohms
0.2-200 Mohms
0.5-500 Mohms
1-1000 Mohms
|
General
Insulation Resistance Test |
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''
''
''
''
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1000
V/200 Mohms
1000 V/500 Mohms
1000 V/1000 Mohms
1000 V/2000 Mohms
|
0.2-200
Mohms
0.5-500 Mohms
1-1000 Mohms
2-2000 Mohms
|
Power
equipment, communication and other electrical
machines used in high voltage systems. |
| Note
: Any other
combination of ranges can also be made on specific
requirement. |
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| Scale
Length |
:
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Approximately
70 mm. |
| Rotational
speed of handle |
:
|
160
r.p.m. and above |
| Response
time |
:
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Less
than 3 seconds when a resistance, the value of
which corresponds to the central scale mark is
suddenly inserted between measuring terminals. |
| Limits
of error |
:
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The
insulation resistance measurement is accurate to
within ± 5% of the indicated value at the scale
mark of the rated resistance in conformity with
IS:2992-1987 stipulations . |
| Tolerance
on Voltage |
:
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Within
± 10 of the rated voltage for scale mark of infinity
& more than 90% of the rated voltage for the
central scale marks. |
| Accuracy
of Voltage |
:
|
The
testers are provided mainly to determine whether
the equipment under test is live or not and not
for any accurate measurement work. However the accuracy
is within ± 10% F.S.D. |
| Tilt
influence |
:
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Less
than 0.5mm deflection from the infinity scale mark,
due to an inclination of 5 degrees from the horizontal. |
| Ambient
temp. influence |
:
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The
deviation in indication is less that ± 5% near the
central scale mark for an ambient temperature change
of 20 degrees from 27 Degree C. |
| Influence
of humidity |
:
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Within
the rated accuracy, at relative humidity of up to
90%.. |
| Insulation
resistance |
:
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1)
More than 25 Mohm between the electric circuits
and case for rated voltage upto and including
250V.
2) More than 50 Mohm between the electric circuits
and case for rated voltage above 250V. |
| Dielectric
strength |
:
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Withstands
application of 2000 volts AC(rms) for 1 minute
between the electric circuits & the case. |
| External
dimensions |
:
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Size
: 160 x 110 x 72 mm. Weight
: 1.0 Kg. ABS Body (NITA)
Size : 178 x 122 x 126 mm. Weight
: 2.3 Kg. Metal Body (NITM) |
Accessories
(supplied with instrument) : Test leads and instruction
manual.
Accessories (supplied optional at extra
cost) : Carrying case. |
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