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Three-phase commutating reactors for DC operating mechanisms

Commutating reactors for converters are used in B6 and B6C circuits from converter assemblies into the line-side infeed. It is their task to limit the line-side voltage dips during commutation of the converter. Also, by limiting the current rise rate di/dt the reactors limit the voltage rise rate du/dt at the thyristors used.

Commutating reactors can also be used for decoupling converter assemblies working in parallel.

There are various series of reactors in the version Standard (Catalog LV 60):

• I_{th max}= 0.8·I_{L max} ("80 % reactors") with u_D ~ 4 % for following supply voltages: 3 AC 400 V, 3 AC 500 V, 3 AC 690 V, 3 AC 750 V
• I_{th max} = I_{L max} ("100 % reactors") with u_D ~ 2 % for following supply voltages:
  3 AC 400 V, 3 AC 690 V, 3 AC 830 V
  and with u_D ~ 4 % for following supply voltages:
  3 AC 400 V, 3 AC 500 V, 3 AC 690 V, 3 AC 750 V

The figures are based on a frequency f = 50 Hz.

If these do not meet your requirements, versions in Standard modified or customized solutions are available. For more information contact "mdexx GmbH" in Bremen:
e-mail: Anfrage@mdexx.com