The Optimal Solution for Harmonic Mitigation & IEEE-519 Compliance

GridHawk® Passive Harmonic Filters (60 Hz)

CTM Magnetics GridHawk passive harmonic filters are a size and cost optimized solution that solves harmonic distortion and guarantees IEEE-519 compliance. The GridHawk filter is specifically designed to handle extreme levels of background voltage distortion of up to 15% THVD without requiring a filter derate. With a built in cooling system, sealed contactors, and a robust capacitor safety circuit, GridHawk filters provide year round peace of mind.

  • Environmentally Rugged
  • Extreme Voltage Distortion Capable
  • Robust & Reliable Capacitor Circuit

Product Options

  • Air Cooled
  • Liquid Cooled
Package Options
  • MagPallet™ Cabinet (NEMA 3R)
  • MagStand™ Cabinet (NEMA 3R)
  • MagPac™ VFD Integrated (NEMA 3R)
  • Open Chassis Modular & Integrated Options
Capacitor Contactor Options
  • No Capacitor Contactors (000)
  • Capacitor Contactors Requiring Customer Control (100)
  • Capacitor Contactors with On-Board Control (200)


Line Power
Generator Power
Gridhawk-Line Power
Gridhawk-Generator Power

GridHawk vs The Competition


  • GridHawk - Environmentally sealed contactors
  • Highly reliable film capacitors
  • Rated for 15% background voltage distortion (NO derate)
  • Integrated cooling system
  • TALON™ Protection

The Competition

  • Unprotected contactors (prove to fail)
  • Electrolytic capacitors
  • Filter derate required above 5% background voltage distortion
  • Cooling system not included


The GridHawk Advantage

No Derate Required

  • Smallest Size & optimized cost
  • 0-15% background voltage distortion

Reliable Performance

  • Thermally protected capacitors & inductors.
  • Highly efficient patented inductors & capacitors.
  • No common mode noise.

Plug & Play

  • Simple 3-in/3-out connection
  • No additional cooling required

Environmentally Rugged

  • Dust, wind, rain, weather proof (NEMA 3R)
  • -50°c - +50°c


The Optimal Solution for Grid Protection

Grid Protection:
Harmful harmonics are filtered from the inverter input, protecting the grid from VFD produced harmonic distortion.

IEEE-519 Compliance:
CTM Magnetics GridHawk® passive harmonic filters are engineered to meet stringent IEEE-519 requirements for mitigating harmonic distortion. GridHawk® passive harmonic filters are designed for extreme levels of grid voltage distortion ≤ 23% without requiring a derate. Guaranteed performance in even the most demanding environments.

Environmentally Sealed Contactors:
Every contactor used in a GridHawk® passive harmonic filter is installed in an environmentally sealed enclosure. If capacitor contactors are not environmentally sealed, dust & debris have a high likelihood of causing contactor failure. When contactors fail, the capacitors are removed from the filter electrical circuit. This significantly reduces the performance of the harmonic filter, preventing IEEE-519 compliance.

Extended System Life and Reliability:
All GridHawk® passive harmonic filters come with thermal protection for both the capacitors and inductors. CTM Magnetics patented inductor technology and highly efficient film capacitors combined with environmentally sealed contactors, and a robust thermal protection circuit, provide best in class performance and reliability.

TALON™ Protection:
Unlike competitors, our integrated power quality solutions prevent unnoticed filter failures, mitigate harmonic distortion, meet IEEE-519 standards, and aid in avoiding citations from grid enforcement. TALON paired with CTM GridHawk Harmonic Filters, deliver comprehensive information and safety measures, guaranteeing optimal efficiency in your power quality operations.


GridHawk® Product Specs

Typical Applications
Six-Pulse Rectifier (generator compatible)

Input Voltage/Frequency
480 V ±10% / 60 Hz

Current Range
GRIDHAWK®: 50 A - 1260 A (Air Cooled) | 50 A - 1260 A (Liquid Cooled)

Maximum THID
<5% @ Full Load | <8% @ 25% Load

Overload Capability
150% rated current for 1 minute (Air)
200% rated current for 1 minute (Liquid)

Enclosure Options
Modular Panel (Air & Liquid Cooled)
NEMA 3R Cabinet (Air Cooled Only)

Capacitor Contactors
0 - No contactor
1 - Contactor for capacitor disconnect (customer control required)
2 - Contactor for capacitor disconnect with automatic pick-up and drop-out (on-board intelligence)

Agency Recognitions
cЯUus 1446
UL 508A

Ambient Temperature Limits
Maximum: 50 °C (122 °F) (Air) | 65 °C (149 °F) (Liquid)
Minimum: -50 °C (-58 °F) (Air) | -40 °C (-40 °F) (Liquid)

Preventative measures should be taken to ensure the coolant does not freeze in the system. For UL 508A listing, the maximum ambient temperature is 40 °C (104 °F).

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