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Phase Current Inputs
Range...............................................................................................8A CT: 1.34–8.0A (10 x CT)
Frequency .................................................................................47.5 to 63.0 Hz
Accuracy...................................................................................with external CT: ±5% / direct: ±2%
Table 1-2: EntelliPro ES CT types primary current ranges and accuracy
Table below shows the nominal motor current range that the EntelliPro CTs can be used.
The range can be enlarged by feeding multiple primary loops. refer to section 1.1.5.
CAUTION:
The overcurrent range above 8*Ict cannot be used to protect motors in explosive areas, due to decrease
accuracy. If motor protection up to 10 *Ict is desired , the nominal current must be derated per the table below.
Example
Motor rated current X is 32 A and motor inrush current is 7X, that is 224 A. EntelliPro CT 32 can be used in ATEX area.
Motor rated current X is 25 A and motor inrush current is 9X, that is 225 A. EntelliPro CT 32 can be used in ATEX area.
Motor rated current X is 32 A and motor inrush current is 9X, that is 288 A. EntelliPro CT 32 must not be used in ATEX area.
EP OS MOTOR MANAGEMENT SY STEM – INSTRUCTION MANUAL
CHAPTER 1: INTR ODUCTION
32A CT: 5.30–32A (10 x CT)
64A CT: 10.6–64A (10 x CT)
630A CT: 105–630A (10 x CT)
Use EntelliPro CT 64 in ATEX area.
1.11
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