R911283714
The R911283714 (DKR03.1-W200B-BE37-01-FW) drive, produced by Bosch Rexroth Indramat, allows direct connection either to a grounded star system or an external three-phase system. In instances where the main voltage and permissible voltage don't align, an autotransformer can be installed to balance it out. For ungrounded three-phase systems, deploy either an isolating transformer or an overvoltage suppressor to shelter the drive controller from damaging line overvoltages. If an overvoltage suppressor is protecting the machine, connecting the drive controller to an ungrounded three-phase system via an isolating transformer is necessary.
The R911283714 (DKR03.1-W200B-BE37-01-FW) from the DKR series is powered by a thyristor bridge, working in tandem with the mains' phase control to produce the needed >400V voltage. This effectively feeds around 520V to the DC bus. When using a transformer as the power source, keep the secondary voltage at or under 400V. Moreover, while overvoltage suppressors are cheaper, their protection level falls short of isolating transformers and they can't be repaired once damaged. Bosch Rexroth, a master in automation products, conducts quality checks on all items, ships them in robust military-grade foam and caters to orders of all sizes, from 1lb to 200lb+.
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