Current Limiting and Filtering Solutions
When used in electrical systems as filters or to limit short circuits to a safe value, Dry & Oil Type Reactors are called Current Limiting Reactors. Reactors are placed on SCR Drives or Inverters to absorb electrical noise created by the drive, a phenomenon known as notching. Pulse distortion and harmonics are bi-directional, and our reactors serve as protective filtering devices that solve many problems associated with electrical power conversion equipment.
Most VFD manufacturers incorporate a DC Link Choke ahead of the DC bus capacitors in the ripple filter circuit. This limits the rate of change of line current relative to time (di/dt) into the capacitors, resulting in a lower peak current by 40% to 60%. When substituted by a three-phase input reactor, typical values are 3% or 5% of the line impedance. All our systems feature a UL Recognized Insulation System DV-220 for up to 600 Volts (UR labeled).
Available Designs & Optional Add-Ons
- Lower than NEMA Standards Sound Level
- LV Molded Case Circuit Breaker or Panelboard
- Watt Hour Meter System
- Totally Enclosed, Non-Ventilated
- Optional Temperature Rises at 80°C or 115°C
- Higher than standards BIL rating
- Open core and coil with special OEM Terminal locations
- Ventilated Enclosure, Indoor or Outdoor
- Operating Frequency: 50, 60, 400 Hz or special
Product Gallery
Welding Transformer Repair
Air Core Reactor
Inverter Output Filter
DC Choke, Interphase
DC Magnet Coil Repair
Differential Type DC Reactor
Our Products & Services
Oil Type
Engineered for durability and efficiency in utility, industrial, and commercial applications.
Dry Type
Ideal for indoor or environmentally sensitive locations where safety and low maintenance are key.
Reactors
Essential for improving power quality by limiting fault currents and filtering harmonics.
Padmounts
The standard for secure, tamper-resistant power distribution from underground connections.
Saturable Current Transformers (SCT's)
Your trusted experts for SCT repair, retrofitting, and rebuilding.
Inverter Duty Transformers
Top-quality transformers with short lead times, built with copper windings and state-of-the-art core material.
Desalter Transformers
We repair, retrofit, and overhaul desalination systems for peak performance and extended lifespan.
In-Field Service
On-site services including oil leak repair, electrical tests, oil sampling, and general maintenance.