EMI Filter

Espey developed this EMI filter for a variable frequency drive (VFD) application. The design is a passive, multi-section LC filter network tuned for high attenuation of conducted emissions for application of an active rectifier, AC to DC converter, eliminating the requirement for transformer isolation, or multi-pulse techniques. The end use is Navy shipboard power interface and EMI compliant.

Electrical Specifications

• Input Voltage: 450 Vac, 3-phase, 60Hz, MIL-STD-1399/300A
• Current Rating: 425A continuous, 600A for 60 seconds

Mechanical Specifications

• Weight: 400 pounds maximum
• Size: 35.50″ X 12.50″ X 7.50″
  Sealed enclosure
  Forced Air cooled

Features

• Meets the requirements of MIL-STD-461E when installed in the applicable variable frequency drive application.
• Meets the requirements of MIL-STD-1399/300A capacity to ground (< 0.1uF)
• Qualified to COTS + (4) requirement including:
• MIL-S-901 shock
• MIL-STD-167 vibration
• MIL-STD-461 EMI
• Innovative design to enable the application of active line rectification for AC to DC power conversion

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