Siemens LOHER CHEMSTAR 1PS2 - Finalizing Electrical Connections; Warning: Damaged Pressure Relief Device; Internal Equipotential Bonding

● Bearing plate seals
● Terminal box seals
●
Cable glands
● etc.
6.2.13 Finishing connection work
1. Before closing the terminal box, please check that:
– The electrical connections in the terminal box are tight and in full compliance with the
specifications above
– The motor is connected so that it rotates in the direction specified
– The inside of the terminal box is clean and free of any cable debris
– All gaskets and seals are intact
– Unused cable glands must be replaced with certified closures or closed with other
suitable closure types. Comply with the installation and operation conditions specified
in the certificate for these plug elements and check that they have been complied with.
– The pressure relief device is intact Depending on the type of terminal box being used,
the pressure relief device can be implemented either by sealing the slots or by using a
pressure relief diaphragm.
WARNING
Damaged pressure relief device
Water and foreign bodies can penetrate the enclosure if the pressure relief device is
damaged:
The
degree of protection of the terminal box is no longer guaranteed, a short-
circuit can occur, which can result in death, serious injury or material damage.
● Do not operate the machine with a damaged pressure relief device.
● Any damage may only be repaired after prior discussion with the person responsible
for the safety of the plant or system and only using original parts. Any damage may
only be repaired after prior discussion with the person responsible for the safety of
the installation and only by using original parts.
2. Close the terminal box.
See section "Tightening torques for screw and bolt connections" for the tightening torque
of the fixing bolts for the cover.
6.2.14 Internal equipotential bonding
The equipotential bonding between the ground terminal in the terminal box enclosure and the
motor frame is established via the terminal box metallic contact faces. The contact faces are
protected against corrosion.
Electrical connection
6.2 Connecting
LOHER CHEMSTAR 1PS2
62 Operating Instructions 08/2016