Installation - Beckhoff SCT Series Documentation

3.3.3

Installation

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.
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 pa-
rameters of the system.
• Switch the system off before commencing with the installation!
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 func-
tional 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 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 [} 38]).
• 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 [} 38]), which is available as an accessory.
• Make the secondary connections. Observe the markings "k-S1" and "l-S2" of the secondary terminals.
SCTxxxx
Technical data, functional description, installation
DANGER
WARNING
WARNING
Version: 1.1 35