Central Braking Modules

• Заказные данные
  (12)
• Информационные материалы

  Информационные материалы

  

  Central Braking Modules limit the DC link voltage at a central location in the drive line-up when the motors are operating in generator mode and energy recovery to the supply system is not possible. If, in regenerative mode, the voltage of the DC busbar exceeds a limit value, an externally installed braking resistor is switched in, thus restricting the voltage from increasing further. The regenerative energy is converted into heat. The braking resistor is switched in by the Braking Unit integrated in the Cabinet Module, which is equipped with state-of-the-art MOSFET/IGBT semiconductors.

  Central Braking Modules are an alternative to the optional Braking Modules (options L61/L62 or L64/L65) and are particularly suitable when high braking powers are required in a drive line-up. The required braking power can also be increased by connecting units in parallel.

  Line voltage	DC link voltage	Braking power P150
  380 ... 480 V 3 AC	510 ... 720 V DC	500 kW/1000 kW
  500 ... 600 V 3 AC	675 ... 900 V DC	550 kW/1100 kW
  660 … 690 V 3 AC	890 ... 1035 V DC	630 kW/1200 kW

  
  
  

  The built-in fan means that Central Braking Modules are also suitable for high continuous power levels.

  Дизайн

  The Central Braking Module is a cabinet unit with integrated braking chopper. Using state-of-the-art MOSFET/IGBT semiconductors, the power unit controls when the braking resistor is switched-in.

  Central Braking Modules are designed as a 400 mm wide cabinet module. Its connection to the DC link is protected by fuses.

  Central Braking Modules require braking resistors that must be externally mounted and which can be ordered separately. The cables to the resistors can be connected to lugs which are specially prepared for plant application and which are located in the connection area of the cabinet.

  The power units have diagnostics LEDs for the display of faults and also a control output for the communication of faults. The Central Braking Module can be disabled externally via a control input.

  The arrangement in the DC link system is subject to specific configuring rules.
  For additional information, please refer to the SINAMICS Low Voltage Engineering Manual.

  Характеристика

  Central Braking Modules are dimensioned for braking powers with the following duty cycles:

  

  Braking powers of the Central Braking Modules

  The braking powers are subject to a cycle time of 600 s. P₁₅₀ is assumed to be the rated braking power. The braking resistors can be assigned according to these power ratings.

  In most applications, Central Braking Modules are only used for occasional braking operations, e.g. stopping a drive in an emergency. Low-cost braking resistors in degree of protection IP21 are specifically offered for these types of applications; these braking resistors are dimensioned for braking powers P_BR with the following duty cycle:

  

  Duty cycle for braking resistors

  Braking resistors with a higher braking power and shorter cycle times are available on request.

  Интеграция

  

  Example of connection of a Central Braking Module

  Технические данные

  		Central Braking Modules
  		6SL3700-1AE35-0AA3	6SL3700-1AE41-0AA3	6SL3700-1AF35-5AA3	6SL3700-1AF41-1AA3	6SL3700-1AH36-3AA3	6SL3700-1AH41-2AA3
  Line voltage		380 ... 480 V		500 ... 600 V		660 ... 690 V
  Braking power P150	kW	500	1000	550	1100	630	1200
  Continuous braking power PDB	kW	200	370	220	420	240	460
  Braking current for P150	A	650	1200	580	1100	520	1000
  Current demand 1)
  230 V 2 AC	A	0.4	0.4	0.4	0.4	0.4	0.4
  Power loss, max. 2) At 50 Hz 400/500/690 V	kW	0.8	1.5	0.8	1.5	0.8	1.5
  DC link capacitance	μF	8160	9720	7640	8680	7640	8680
  Cooling air requirement	m3/s	0.14	0.14	0.14	0.14	0.14	0.14
  Sound pressure level LpA (1 m) at 50/60 Hz	dB	55	55	55	55	55	55
  Braking resistor connection		M12 screws	M12 screws	M12 screws	M12 screws	M12 screws	M12 screws
  Conductor cross section, max. (IEC)	mm2	2 × 240	2 × 240	2 × 240	2 × 240	2 × 240	2 × 240
  PE/GND connection		PE bar	PE bar	PE bar	PE bar	PE bar	PE bar
  Busbar cross-section	mm2	600	600	600	600	600	600
  Conductor cross section, max. (IEC)	mm2	240	240	240	240	240	240
  Degree of protection		IP20	IP20	IP20	IP20	IP20	IP20
  Dimensions
  Width	mm	400	400	400	400	400	400
  Height 3)	mm	2200	2200	2200	2200	2200	2200
  Depth	mm	600	600	600	600	600	600
  Weight, approx.	kg	230	230	230	230	230	230
  Frame size	mm	400	400	400	400	400	400

  
  
  

  ¹⁾ Current demand of the fans.

  ²⁾ The specified power loss represents the maximum value at 100% utilization. The value is lower under normal operating conditions.

  ³⁾ The cabinet height increases by 250 mm with degree of protection IP21, and by 400 mm with degrees of protection IP23, IP43 and IP54.

   

  		Braking resistors
  		6SL3000-1BE35-0AA0	6SL3000-1BE41-0AA0	6SL3000-1BF35-5AA0	6SL3000-1BF41-1AA0	6SL3000-1BH36-3AA0	6SL3000-1BH41-2AA0
  Line voltage		380 ... 480 V		500 ... 600 V		660 ... 690 V
  Braking power PBR	kW	500	1000	550	1100	630	1200
  Continuous braking power PDB	kW	23	58	34	62	42	75
  Resistance value	Ω	0.95	0.49	1.35	0.69	1.8	0.95
  Degree of protection		IP21	IP21	IP21	IP21	IP21	IP21
  Dimensions
  Width	mm	960	960	960	960	960	960
  Height	mm	620	620	620	620	620	620
  Depth	mm	790	1430	1110	1430	1110	1430
  Weight, approx.	kg	82	170	110	180	124	196