Phoenix Contact CSS 1.5-1/3-EMC Handleiding (152 Pagina's)

Handleiding

Wiring

109908_en_02 Phoenix Contact 37 / 150

5.5.1 Removal

1. Use a screwdriver to lift up the plug-in bridge 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 plug-in bridge. Removing the IT plug-in bridge disconnects the inter-

nal 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 ground of the motor and the

CONTACTRON Speed Starter 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 only permitted in symmetric

systems with a maximum voltage from phase (phase L1, L2, L3) to neutral

conductor/ground (N/PE) of 300 V.

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