2. Measure the insulation resistance between each phase conductor and the ProtectiveEarth conductor using a measuring voltage of 1000 V DC. The insulation resistance ofan ABB motor must exceed 100 Mohm (reference value at 25 °C or 77 °F). For theinsulation resistance of other motors, consult the manufacturer’s instructions.Note:Moisture inside the motor casing will reduce the insulation resistance. If moisture issuspected, dry the motor and repeat the measurement.1000 V DC,> 100 MohmU1-V1, U1-W1, V1-W1U1-PE, V1-PE, W1-PEohmM3~U1V1W1 PEohm￭ Custom brake resistor assemblySee section Electrical installation of custom brake resistors (page 270).Checking the compatibility with IT (ungrounded) systemsEMC filter +E202 is not suitable for use in an IT (ungrounded) system. If the drive is equippedwith filter +E202, disconnect the filter before connecting the drive to the supply network. Forinstructions on how to do this, contact your local ABB representative.WARNING!If a drive with EMC filter +E202 is installed on an IT system (an ungrounded powersystem or a high resistance-grounded [over 30 ohm] power system), the systemwill be connected to earth potential through the EMC filter capacitors of the drive.This may cause danger, or damage the unit.Attaching the device stickers to the cabinet doorA multilingual device label sticker is delivered with the drive. Attach the stickers in theappropriate language on the English texts; see section Door switches and lights (page 43).Checking the settings of transformers T21, T101 and T111Check the tap settings of all auxiliary voltage transformers. Transformer T21 is standardequipment; T101 and T111 are present depending on drive configuration.The voltage settings of transformers T21 and T101 are made at terminal blocks T21_X1/X2and T101_X1/X2 respectively. The settings of transformer T111 are made on the transformeritself. The locations of the transformers and the terminal blocks are shown in sectionOperation principle and hardware description (page 29).96 Electrical installation
