Braking Modules

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  Braking Module

  A Braking Module and the matching braking resistor are needed by the drive when it brakes or needs to be stopped for a specific reason, e.g. for an EMERGENCY STOP. Large fans which are caused to rotate by air flow are a typical application. In such instances, it is important to consider operating states which could result in speeds in excess of the desired maximum speed but also the possibility of reversal of rotational direction during restart from standstill. A braking unit is also required if the fan must be brought to a standstill within a defined time period.

  The Braking Module houses the power electronics and the associated control circuit. The supply voltage for the electronics is taken from the DC link.

  During operation, the DC link power is converted into heat loss in an external braking resistor.

  The activation threshold of the Braking Module can be adjusted by means of a switch. The braking power values indicated in the technical specifications apply to the upper activation threshold.

  Дизайн

  The Braking Module is designed for installation in the control cabinet. It must always be mounted vertically.

  A Braking Module is assigned its own dedicated braking resistor. The Braking Module is connected to the DC link by means of flexible cables.

  The Braking Module has the following interfaces as standard:

  • DC link connection
  • Connection for braking resistor
  • 1 digital input (inhibit Braking Module/reset error)
  • 1 digital output (Braking Module faulty/ready)

  A switch is provided for adjusting the activation threshold.

  Характеристика

  

  Load diagram for Braking Modules and braking resistor

  Интеграция

  

  Connection example of a Braking Module

  Технические данные

  Line voltage 380 ... 480 V 3 AC	Braking Module
  	6SL3760-1AE32-6AA0
  Rated power PDB	50 kW
  Power P20	200 kW
  Braking current for PDB	65 A
  Activation thresholds (adjustable via switch)	670 V / 770 V (factory setting)
  Connectable resistance
  With braking power PDB	3.1 Ω
  Digital input
  Voltage	24 V
  Low level (an open digital input is interpreted as "low")	<3 V
  High level	<7 V
  Current consumption at 24 V DC, typ.	0.01 mA
  Conductor cross-section, max.	2.5 mm2
  Digital output
  AC voltage, max.	250 V
  Load current per digital output, max.	2 A
  Conductor cross-section, max.	2.5 mm2
  Power loss, max.	0.1 kW
  Braking resistor connection	Screw terminal
  Conductor cross-section, max.	35 mm2
  Cable length, max.	100 m
  DC link connection	Screw terminal
  Conductor cross-section, max.	35 mm2
  Cable length, max.	3 m
  Degree of protection	IP20
  Dimensions
  Width	180 mm
  Height	220 mm
  Depth	152 mm
  Weight, approx.	5.5 kg