115General guidelines – North America ..............................................................
116
Continuous motor cable shield/conduit and metal enclosure for
equipment on the motor cable .......................................................................
117Separate control cable ducts ..........................................................................
117Implementing short-circuit and thermal overload protection ........................
117Protecting the drive and the input power cable in short-circuits ...........
118Protecting the motor and motor cable in short-circuits ..........................
118Protecting the motor cables against thermal overload ............................
118Protecting the motor against thermal overload ........................................
119
Protecting the motor against overload without thermal model or
temperature sensors ........................................................................................
119Protecting the drive against ground faults .........................................................
119Residual current device compatibility ..........................................................
120Implementing the emergency stop function ......................................................
120Implementing the Safe torque off function ........................................................
120Using power factor compensation capacitors with the drive ........................
120Controlling a contactor between drive and motor ............................................
121Implementing an ATEX-certified motor thermal protection ...........................
121Implementing the power loss ride-through function .......................................
122Using a safety switch between the drive and the motor .................................
122Implementing a bypass connection .....................................................................
123Example bypass connection ...........................................................................
124Switching the motor power supply from drive to direct-on-line .
124Switching the motor power supply from direct-on-line to drive .
124Protecting the contacts of relay outputs ............................................................
125Limiting relay output maximum voltages at high installation altitudes ......
125Implementing a motor temperature sensor connection .................................
126
Connecting a motor temperature sensor to the drive through an option
module .................................................................................................................
6 Electrical installation – Global (IEC)
129Contents of this chapter .........................................................................................
129Warnings ....................................................................................................................
129Required tools ...........................................................................................................
130Grounding the motor cable shield at the motor end ........................................
130Measuring the insulation ........................................................................................
130Measuring the insulation resistance of the drive .......................................
130Measuring the insulation resistance of the input power cable ...............
130Measuring the insulation resistance of the motor and motor cable ......
131Brake resistor assembly for R1…R3 ..............................................................
132Grounding system compatibility check ...............................................................
132EMC filter ............................................................................................................
132Ground-to-phase varistors ..............................................................................
132
When to disconnect EMC filter or ground-to-phase varistor: TN-S, IT,
corner-grounded delta and midpoint-grounded delta systems .............
8 Table of contents
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