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Commissioning
Digistart IS User Guide 17
Issue: 4 www.controltechniques.com
4. Electrical Installation
Always apply control voltage before (or with) mains voltage.
Always follow the specified tightening torque for all power and ground terminal connections.
For specifications and detailed technical data, see Technical Data on page 82.
4.1 Terminal layout
4.1.1 Power terminations
Use only copper stranded or solid conductors, rated for 75 ºC.
Some units use aluminium bus bars. When connecting power terminations, we recommend cleaning the surface contact
area thoroughly (using an emery or stainless steel brush) and using an appropriate jointing compound to prevent
corrosion.
For personnel safety, the power terminals on models up to IS1x0105B are protected by snap-off tabs. When using large
cables, it may be necessary to break off these tabs.
Models which are internally bypassed do not require an external bypass contactor.
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