Commissioning

• Make sure that the working environment is safe during assembly, maintenance and installation work. Interrupt the power supply of the primary conductors and secure against being switched on again inadvertently.
• Install the current transformer on the primary conductors.
• To do this, feed the primary conductors (copper bar or round conductor) through the window apertures of the current transformer housing.
  The window apertures are marked with "K-P1" and "L-P2" as well as with L1, L2, L3 (for the individual phases).
• The devices of the types SCT3215 and SCT3315 can be fastened directly to the primary conductors or alternatively to a mounting plate.
  Use the fastening materials included in the scope of delivery for this.
• Direct fastening to the primary conductors is done by screwing the fastening screws included in the accessories pack into the screw bosses on the transformer housing.
• Mounting on a mounting plate takes place with the base fastening brackets also included in the accessories pack.
• The SCT31xx types are intended for snap-on fastening to 35 mm DIN rails.
• Make the secondary connections.
  Observe the markings on the secondary terminals.

Measuring circuit

Fig.23: Measuring circuit - SCT3xxx transformer

Fig.24: Example Eplan macro for SCT3xxx current transformers

Assembly notes

Fig.25: Mounting the fastening screws SCT3215, SCT3315

Fig.26: Mounting on copper bar or round conductor, SCT3215, SCT3315

Fig.27: Tightening torque of fastening screw: 0.5 Nm

Fig.28: Mounting on mounting plate SCT3211

Fig.29: Mounting on mounting plate SCT3315

Fig.30: Connection example

• UL notes