Satel SENNET DL150, Manual

Page: 35 / 87

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Dataloggers SenNet DL150 / DL151 / DL170 / DL171 / DL172. Technical manual
Version 1.01 Satel Spain 35
That is, the possible combinations are:
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9 single-phase,
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3 single-phase + 2 three-phase,
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6 single-phase + 1 three-phase
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or 3 three-phase meters
If you want to measure a single-phase load that is associated with a
particular phase, the current transformer must be connected to the terminal
of the same phase.
For example, if the meter is associated with V3 (or T), the current
transformer (or Rogowski coil) must be connected to the phase V3 (T) (see
figure below).
It is important to note that the single-phase meters M11, M21, and M31 are associated with the V1
phase, the single phase meters M12, M22 and M32 to the V2 phase, and M13, M23 and M33 to the
V3 phase.
For example, in this case, M13 is associated with V3, so the current transformer or Rogowski coil must
be installed on V3.
In the following diagram, there is an example in which only T2 and M13 are used.
SP1.3 Three-phase meter 2
Voltage
reference
I+ I- I+ I- I+ 2- I+ I- VN V1 V2 V3
Figure 15. Example. Connection of a three-phase electricity meter and a single-phase one
5.5.5. Current transformers and Rogowski coils
All meters, either used as three-phase (T1, T2, T3) or single-phase (M11, M12, M12, M21, M22...), can
be connected to current transformers or Rogowski coils as follows: