Phoenix Contact 1201132, User Manual

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Wiring
109908_en_00 PHOENIX CONTACT
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5.5.1 Removal
1. Use a screwdriver to lift up the jumper and remove it.
Isolating main power from ground
If the power distribution system for the CONTACTRON Speed Starter is a floating ground
system (IT systems) or an asymmetric ground system (corner grounded TN systems), you
must remove the IT jumper. Removing the IT jumper disconnects the internal components
from ground to avoid damaging the internal circuits and to reduce the ground leakage
current.
Important points regarding ground connection:
– To ensure the safety of personnel, proper operation, and to reduce electromagnetic
radiation, you must properly ground the motor and CONTACTRON Speed Starter
during installation.
– The diameter of the grounding cables must comply with the local safety regulations.
– You must connect the shielded cable to the CONTACTRON Speed Starter’s ground to
meet safety regulations.
– Only use the shielded cable as the ground for equipment when the aforementioned
points are met.
– The connection of the CONTACTRON Speed Starter is just permitted in symmetric
systems with a voltage from phase (phase L1, L2, L3) to neutral/earth (N/PE) of
maximum 300 V.