Put safety first with Arc Fault Drives

NHP Electrical Engineering Products Pty Ltd
Tuesday, 08 June, 2021

Put safety first with Arc Fault Drives

Safety is our number one priority, as it is for our customers.

Arc faults can cause serious injury and even fatalities. Why put personnel in danger when you can install an arc fault contained variable speed drive? Rockwell Automation’s specially designed enclosure now adds another layer of personnel protection in the event of an arcing fault.

Variable speed drives have been difficult to design to withstand arcing faults due to critical failure points in vents and fans, but Rockwell Automation has designed a patented arc baffle ventilation system which allows air flow under normal operating conditions, but under an arcing fault, diverts all gases flowing from the enclosure and provides no direct path for gas.

The floor mounted VSDs with arc baffle ventilation system have been successfully tested in accordance with IEC/TR Edition 3.0 and AS/NZ 3439.1 Annex ZD.

The range is available in a floor standing configuration up to 250kW.

Simplified integration

Rockwell Automation’s PowerFlex 750 offers seamless integration into the Logix environment for simplified and enhanced configuration, programming, diagnostics and maintenance.


The PowerFlex 750 series supports a comprehensive range of network protocols to ease integration into your architecture. The PowerFlex 755 features an embedded EtherNet/IP port, allowing you to easily manage drive data over EtherNet/IP networks.

Safe Torque-off and Safe Speed Monitor

Help protect personnel and equipment while reducing machine downtime with safety solutions up to and including PLe/SIL, Cat 3 and Cat 4.

  Enclosure   IP 54, Floor Mounted
  Temperature range   0-40°C
  Voltage range   380-400V AC
  Form of separation   Form 4B, in accordance with AS/NZS 61439
  Cable entry / exit   Bottom / bottom


  Normal Duty Rating at 400V   55 kW   90 kW   132 kW   200 kW   250 kW
  Heavy Duty Rating at 400V   45 kW   75 kW   110 kW   160 kW   200 kW
  Width   702 mm   902 mm   902 mm   1002 mm   1002 mm
  Depth   800 mm   800 mm   800 mm   800 mm   800 mm
  Height   2300 mm   2300 mm   2300 mm   2300 mm   2300 mm

Standard Inclusions

  • Incoming circuit breaker with shunt release and auxiliary contacts
  • 24V DC power supply
  • Door mounted human interface module
  • 24V DC I/O module
  • 4mm aluminium gland plate


  • Line and load side reactors (which increase the overall width on certain sizes).

To find out more, please contact your local NHP Account Representative or contact:

Australia - 1300 NHP NHP nhpsales@nhp.com.au New Zealand - 0800 NHP NHP sales@nhp-nz.com.

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