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CURRENT
TRANSFORMERS |
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basic application of current transformers are
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-
Lowering
the very high primary current passing through
bus bars, cables, or wires to 5A or 1A,
a measurable quantity by measuring instruments.
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Isolating the measuring instrument and protective
devices from mains.
- Reproducing
proportionate primary current on its secondary
side required for extending the range of
the instruments.
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CTS are of different types : |
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- BAR
PRIMARY CURRENT TRANSFORMER (BPCT)
For Current of 100A and above the bus bars
or cables are quite thick and it is easier
to measure the currents without breaking
the bus bars or cable by means of a Bar
Primary current transformer which can be
slipped over the bus bar or cable. These
CTs are most commonly used as they are sturdy,
compact and cheaper.
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- WOUND
PRIMARY CURRENT TRANSFORMER (WPCT)
For currents below 100A, it is uneconomical
to achieve the desired accuracy by employing
Bar primary type CTs and the solution is
Wound Primary C.T., where both primary and
secondary are Wound over the core.
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- CLAMP
ON CT'S
NIPPEN clamp on CT's enable quick and accurate
current measurements on live circuits without
disconnecting loads. Precision phase shift
characteristics ensure accurate power or
energy measurements conveniently. These
form one of the accessories in our energy
audit system.
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Three
Models are available :
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Model |
Range |
Accuracy |
Burden |
Cond.Size |
| NE1 |
100/1A |
1% |
1
Ohms |
ø 15mm |
| NE2 |
1000/5A |
2% |
20
Ohms |
ø 53mm |
| NE3 |
3000/5A |
2% |
20
Ohms |
ø 70mm |
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