Commissioning

DANGER

Open transformer circuits lead to electric shock and arc flashover!

Disregarding this will result in death, physical injury or considerable damage to property!

Never open the secondary circuit of the current transformer under load.
Short-circuit the secondary current terminals of the current transformer before removing the device.

WARNING

Hazardous voltage can lead to electric shock and burns!

Make sure that the details on the name plate and in the "Technical data" correspond to the operating parameters of the system.
Switch the system off before commencing with the installation!

WARNING

Induction of high voltages into the secondary circuit!

If the secondary circuit of the current transformer is not under load (open), high voltages are induced on its secondary terminals. The voltage values occurring there represent a danger to persons and the functional safety of the current transformer.
"Open operation", i.e. operation of the current transformer without secondary wiring, must be avoided at all costs.

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