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