Electrical installation 91
WARNING! Do not install the drive with the ground-to-phase varistor connected to
an IT system (an ungrounded power system or a high-resistance grounded [over
30 ohms] power system), otherwise the varistor circuit can be damaged.
Corner-grounded and midpoint-grounded 690 V delta systems
WARNING! Do not install the drive on a 690 V corner-grounded or midpoint-
grounded delta system. Disconnecting the EMC filter and ground-to-phase
varistor does not prevent damage to the drive.
Attaching the device stickers to the cabinet door
A multilingual device label sticker is delivered with the drive. Attach the stickers in the local
language on the English texts; see section Door switches and lights (page 39).
Checking the settings of transformers T21, T101 (frame
R11 +B055+C128), T102 (frame R11 +B055)
Check the tap settings of all auxiliary voltage transformers.
The voltage settings of the transformers are made at terminal blocks X1/X2.
The locations of the transformers and the terminal blocks are shown on page 35.This
figure shows an example connection.
Transformers of R11
Transformer T21 is standard equipment.
T102 is available in R11 with option +B055 (IP54), but with options +B055+C128 (IP54 +
cooling air through bottom) also transformer T101 is located on the top frame.
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