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3.5. Phase CT and neutral CT selection
Model
Phase
nominal
current
Neutral nominal current
Phase range Neutral range
SIL-D00 1 A or 5 A
Residual phase connection,
1A or 5A
0.1 -30 A or 0.5-150 A 0.2-30A or 1-150A
SIL-D0S 1 A or 5 A
Residual phase connection,
0.5A or 0.1A
0.1-30 A or 0.5-150 A
0.1-30 A or 0.5-150 A
or
0.01-3A or 0.05-15A
SIL-DS0 0.5A or 2.5A
Residual phase connection, 1A
or 5A
0.05-15 A or 0.25-75 A
0.05-15 A or 0.25-75 A
or
0.1-30 A or 0.5-150 A
SIL-DSS 0.5A or 2.5A
Residual phase connection,
0.5A or 0.1A
0.05-15 A or 0.25-75 A
0.05-15 A or 0.25-75 A
or
0.01-3A or 0.05-15A
To ensure the relay functions correctly, a suitable current transformer must be used. The load of
the relay’s own measurement circuits and the load on the cables that connect the CTs and the
relay must be taken into account.
ACCURACY BURDEN RELAYS
5P10 1,5 VA SIL-D/1
5P20 1,5 VA SIL-D/1
5P30 1,5 VA SIL-D/1
5P10 1,5 VA SIL-D/5
5P20 1,5 VA SIL-D/5
5P30 1,5 VA SIL-D/5
Voltage measurement range is from 2 to 65 V