2857-570/024-001
Planning
Product manual | Version: 2.0.0
63
3-Phase Power Measurement Module, 1 A
1-Phase (Split-Phase) 3-Wire System
Please observe the following:
• Permissable System voltage: ≤ 300 V.
• Mains supply voltage: 240 / 480 V
• Connection terminal N on the product is reference potential for all voltage inputs.
• The current transformer connected to the neutral conductor is not mandatory and can
be used optionally. Thus, the transformer is grayed out in the connection example.
Figure 24: 1-Phase (Split-Phase) 3-Wire System
5.6.2 Power Measurement in 3-Wire 3-Phase Networks
To measure the voltages and currents of a 3-wire three-phase network, connect the four
wires with connection terminals L1, L2, L3 and the current transformers or Rogowski coils
with the current measurement inputs.
3-Phase Power Measurement without N-Conductor; without voltage transformer
(ARON)
Please observe the following:
• Mains supply voltage:
– 3-Phase 3-wire systems with earthed phase: ≤ 240 V.
– 3-Phase 3-wire systems unearthed phase: ≤ 277 V.
• Connection terminal N on the product is reference potential for all voltage inputs.
• The current transformer connected to the reference conductor (L2) is not mandatory
and can be used optionally. Thus, the transformer is grayed out in the connection ex-
ample.
