Short-circuit current rating (SCCR): Short-circuit strength of Lenze controllers (i950, i700, i500, 9400, 8400, ECS)

Question:
What are SCCR values needed for and how important are they?
 
Answer:
Mechanical engineers need the SCCR values (Short-Circuit Current Rating) of the components installed in the control cabinet to determine the permissible SCCR of a control cabinet according to UL standards.  
The SCCR value of a component indicates the maximum short-circuit current of the supplying mains on which the component may be operated with the corresponding fusing.
For this, Lenze controllers have been tested with specific overcurrent components on corresponding mains. 
 
The following SCCR values are examples of some Lenze controllers.
  • i550                                             100 kA / 480V    
  • i700 power supply modules:  100 kA / 480V
  • i950:                                            100 kA / 480V    
  • 9400 HL:                                     100 kA / 480V
  • 9400 multi-axis devices:          100 kA / 480V
  • 9400 regenerative modules    100 kA / 480V
  • 8400 HL/TL:                                200 kA / 500V
  • ECS power supply modules:    100 kA / 480V
The SCCR values are assigned to overcurrent protection devices. The corresponding data can be found in the latest product documentation. Data: Type, class and sometimes designation.
For mains systems with extremely low impedance that could allow short-circuit currents above these values, additional measures have to be taken to limit the max. short-circuit current. 


URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/201600601/1/
Meta data
Taxonomy: i700 axis module E70ACM , i700 axis module E70BCM , i700 power supply module E70ACP , i750 axis module i75A , i700 servo inverters , i950 servo inverter i95A , 9400 HighLine servo inverters , 9400 Servo PLC servo inverters , 9400 StateLine servo inverters , ECSxE power supply module , i550 cabinet frequency inverters , 8400 HighLine frequency inverters , 8400 TopLine frequency inverters
AKB-ID: 201600601
Last update: 2024/05/22
Category: FAQ, Tips and Tricks

Lenze reserves the right to change information on this page at any time. Any liability for the accuracy of the information is excluded.
Formulario de contacto