Siemens 1LA8, Operating Instructions Manual

Page: 78 / 174

6.5.3 Connect metal shield in the terminal box
If you are using metal-armored cables that are inserted into the terminal or auxiliary terminal
boxes with non-intrinsically safe circuits, then ground the metal shield in the terminal box.
Additional grounding points are permissible.
● In terminal boxes with internal grounding part, connect the metal shield to the internal
grounding point.
● In terminal boxes without internal grounding part, connect the metal shield to one of the
green-yellow grounding terminals.
6.5.4 Connecting temperature monitoring for the stator winding
The stator winding is monitored for thermal loading by resistance thermometers embedded in
the stator winding.
The connecting leads of the temperature sensors are routed to the main or auxiliary terminal
box. The connection and assignment of the terminals is shown on the terminal diagram in the
particular terminal box.
WARNING
Hazard due to electric shock
The installation of the temperature sensors for the winding monitoring with respect to the
winding is implemented according to the requirements for basic insulation. The temperature
sensor connections are located in terminal boxes, safe to touch, and have no protective
separation. This is the reason that in the case of a fault, a hazardous voltage can be present
at the measuring sensor cable. When touched, this can result in death, severe bodily injury
and material damage.
When connecting the temperature sensor to external temperature monitoring devices, when
required, apply additional measures to fully comply with the requirement "Hazard due to
electric shock", see IEC 60664-1 or IEC 61800-5-1.
Electrical connection
6.5 Connecting the auxiliary circuits
SIMOTICS TN Series N-compact 1LA8
78
Operating Instructions 05/2014