User Documentation

4. Installation
 During assembly, maintenance and installation work, ensure a safe
working environment. If necessary, interrupt the power supply to the
primary conductor and secure it against being inadvertently switched
back on.
Important: If the power supply is not interrupted during assembly of
the primary conductor, the current transformer's secondary circuit
must be closed first.
Connect the measuring device or if necessary bridge the secondary
connections.
 To open the current transformer, press the two actuator buttons
simultaneously (Figure 1). On type KBU 816, first remove the knurled
screw (Figure 2).
 Wrap the current transformer around the primary conductor and close
it by firmly pressing together.
On type KBU 816, reattach the knurled screw.
Note the direction of current flow. The window opening is marked with
"K-P1" and "L-P2". P1 points towards the current source, P2 to the
consumer.
Important: Ensure that the interfaces of the divided core are clean,
and avoid hand contact (sweat).
 The device can be attached optionally directly on the primary
conductor or on a mounting plate. To do this, use the attachment
materials included in the scope of delivery.
Direct attachment to the primary conductor is achieved by screwing
the fastening screws included in the accessory pack into the screw
bosses located in the transformer housing.
Installation on the mounting plate is achieved using the foot angle
included in the accessory pack.
 If you have not already done so, now connect the secondary wires on
the current transformer to the measuring device (ammeter, meter,
etc.). Note the operating instructions for whichever device you are
using.
 Check that the current transformer is installed correctly and that the
secondary wires are connected properly.
 If necessary, remove the bridge on the secondary connections.
 If necessary, switch the power supply to the primary conductor back
on.