|
| Measuring
Current transformers and protective CTs available as
resin coated or tape wrapped. Primary ranges from
1A-5000A with 1A or 5A secondary. Available with various
internal diameters
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Description
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A
range of ring type current transformers
suitable for primary currents from 1A-5000A
with 1A or 5A secondaries. This standard range
of measuring and protective current
transformers is available as resin coated or
tape wrapped. |
| Application |
Suitable
for measuring or protective applications with
accuracies of class 0.2, 0.5, 1, 3, 5P10,
10P10 etc. |
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Primary
currents from 1A - 5000A. |
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Measuring
or Protective types. |
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Base
or busbar mounting. |
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Choice
of sizes to customers specification. |
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Conforms
to IEC 44-1, IEC 185, and BS7626. |
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Rated
system voltage 0.72 / 3kV. |
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Ambient
temperature range -30ºC to 85ºC. |
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Frequency
Range 5-60Hz. |
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Insulation
Level, 3kV (50Hz for 1 minute. |
| Our production
facilities allow automated printing of test
cetificates for individual current
transformers, if requested. |
| Ring type current
transformers can be provided with sealable
terminal covers. Please specify on your order
if required. |
| When choosing the
VA of a current transformer, the burden of the
instrument should be taken into account. For
example, moving iron panel eters require a VA
of less than 2.5 . |
| Where possible the
instrument is remote from the CT, the VA
imposed by the length of the connection wires
should be taken into consideration. |
| The graph opposite
outlines the effect of connection wire length
on VA. |
| The ratio of a
current transformer can be reduced by pasing
more than one conductor turn through the
centre of the CT. The ratio will therefore be
the CT primary divided by the number of turns. |
| For example, a
400/5A CT with 2 primary turns passed through
the centre, will provide an actual ratio of
200/5A |
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