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MAIntenAnce
Before each use, inspect the flexible current transducer and its latching
system for any damage for continued safety. Pay particular attention to the
insulation surrounding the flexible measuring head.
The flexible current transducer and its latching system require no special
care. Ensure that no foreign object obstructs the latching mechanism. Clean
the CT-53 with a damp cloth and a mild detergent. Do not use abrasives,
solvents, or alcohol.
If ct-53 does not perform properly, use the following steps to help isolate
the problem:
• Inspect the coupling system for any damage. If a foreign material is
present, the coupling system will not close properly and errors will
result.
• Inspect the cables between the flexible measuring head and CT-53
circuit box. Also inspect between the CT-53 circuit box and DM-5 for any
damage.
• Check the selected RANGE on the circuit box and ensure that the RANGE
indicator is ON.
• Verify the transducer setting on DM-5 is correct.
SPecIFIcAtIonS
current range
output voltage
Measuring range
conductor size
Accuracy (sine wave)* ±1.0% (45 Hz to 65 Hz)
Phase characteristics
300 A / 1000 A / 3000 A
AC rms
300 A range: 500 mVac / 300 Aac (1.67 mV / A)
1000 A range: 500 mVac / 1000 Aac (0.5 mV / A)
3000 A range: 500 mVac / 3000 Aac (0.167 mV / A)
300 A range: 30 A to 300 A (424 Apeak)
1000 A range: 100 A to 1000 A (1414 Apeak)
3000 A range: 300 A to 3000 A (4243 Apeak)
Ø20 mm (0.787 in) maximum for published accuracy
o
Within ±1
300 A range: 30 A to 300 A (45 Hz to 65 Hz)
1000 A range: 100 A to 1000 A (45 Hz to 65 Hz)
3000 A range: 300 A to 3000 A (45 Hz to 65 Hz)
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