Power measurement at a machine

WARNING

Risk of injury from electric shock!

Bring the bus terminal system into a safe, de-energized state before starting mounting, disassembly or wiring of the bus terminals!

	Connection of low power split-core transformers with current and voltage interfaces Both low power transformers with current and voltage interfaces can be connected to the RJ45 connections X1 - X4. When using small signal transformers from the SCL and SVL series, the transformer ratios are set automatically via the electronic nameplate. When using transformers without an electronic nameplate, manual configuration via the “modules/slots” procedure is required.

The voltage is measured via a low power voltage transformer (e.g. from the Beckhoff SVL series) in the following example via the RJ45 connection X1.
The current is measured by means of a low power split-core transformer, 3-channel current interface (e.g. from the Beckhoff SCL series) in the following example, the RJ45 connection X2.

Power measurement at a machine 2:

	Terminal fuse protection The voltage measurement inputs are high-resistance; a minimum measuring current flows. The protection for the SVL connections must therefore be applied in accordance with the conductor cross-section used. For current measurement inputs, the fuse protection must be adapted by the device to be measured. The secondary currents of the transformers are no longer fused (see fig.)

	**) FE as star point for 3-phase systems without neutral conductor Depending on the current transformer used, in 3-phase systems without a neutral conductor FE must be connected as a star point as shown in the figure above. Please observe the current transformer manufacturer's instructions!

	Negative power values If negative power values are measured on a circuit, please check whether the associated current transformer circuit is connected correctly.