Commissioning

• Make sure that the working environment is safe during assembly, maintenance and installation work. Interrupt the power supply of the primary conductor and secure against being switched on again inadvertently.
• Install the current transformer on the primary conductor.
• To do this, feed the primary conductor (copper bar or round conductor) through the window aperture of the current transformer housing. The window aperture is marked with "K-P1" or "L-P2" respectively.
• The device can be fastened directly to the primary conductor or alternatively to a mounting plate. Use the fastening materials included in the scope of delivery for this.
• Direct fastening to the primary conductor is done by screwing the fastening screws included in the accessories pack into the screw bosses on the transformer housing or with the optionally available quick-fix cable fastening (ZB8203-0210/ZB8203-0211).
• Mounting on a mounting plate takes place with the base brackets also included in the accessories pack.
• Current transformers of the types SCT21xx and SCT22xx can also be fastened to 35 mm DIN rails by means of a snap-on mounting (ZB8201-0210), which is available as an accessory.
• Make the secondary connections. Observe the markings "k-S1" and "l-S2" of the secondary terminals.

Measuring circuit

Fig.29: Measuring circuit - SCT0xxx/SCT1xxx/SCT2xxx transformer

Assembly notes

Fig.30: Actuation of the secondary connecting terminals (CAGE CLAMP®)

Fig.31: Mounting the fastening screws

Fig.32: Mounting on copper bar or round conductor

Fig.33: Mounting with quick-fix cable fastening (ZB8203-0210, ZB8203-0211)

Fig.34: Mounting on 35 mm DIN rail with snap-on mounting (ZB8201-0210)

Fig.35: Mounting on mounting plate

Fig.36: Mounted sealing plate