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VFD SYSTEMS & INTEGRATION

We are a leading provider of drive solutions, while delivering an array of stand-alone and integrated drives. Since the inception of AC drive technology, the team at Helix has been an industry leader in drive offerings, while maintaining a focus on drives within the HVAC market. Helix drives can be seen on-site controlling large scale AHU systems, cooling towers, pumps, conveyor systems, and more!

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Overview

We offer VFD solutions that go beyond the standard supply of VFD and components in a box. At Helix, we ensure the wiring and component layout prevents any unwanted interference while maintaining easy access of customer power and control wiring termination points.

 

The proper layout ensures that high temperature components have adequate ventilation and air flow to ensure the complete internal assembly is within the manufacturers and CSA guidelines. All Helix VFD assemblies are tested at full load and programmed prior to delivery for ease of start-up on site. If motor data is available prior to factory testing, then the factory program does not require any parameter changes for on-site commissioning. This ensures a quick and efficient start-up after voltage verification and confirmation of proper field wiring of the VFD assembly.

WHY HELIX DRIVES

Helix, a leading supplier of AC motor control technology and automation products, has enhanced its line of variable frequency drives for heating, ventilation, air conditioning and refrigeration. The Helix HVAC VFD portfolio of products is designed with the features and functions required for HVAC systems, with the same reliability, robustness and energy-efficient control known in our industry lines. All control boards are conformal coated as standard to prevent corrosion from the normal chemicals found in the atmosphere.

BUILT AS PER UL, CSA & NEMA STANDARDS
RUGGED FAULT TOLERAN MODULAR CONSTRUCTION
SERVICE ACCESSIBILITY WITH ONBOARD DOCUMENTATION
ADVANCED DIAGNOSTICS WITH TEMPERATURE & THERMAL PROTECTION
ISOLATED MAIN BUS & MOTOR CABLE TERMINATION SECTION
AIR COOLED IP 42 DESIGN

The Helix series of VFD’s are designed and manufactured based on the manufacturer’s specifications to prevent radio frequency (RFI), electromagnetic (EMI), harmonic or motor issues from occurring. The standard harmonic filtering within the Helix series VFD’s is reduced to less than 50% of the harmonic current of VFD’s without input line filtering.

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HELIX DRIVE OPTIONS

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ENCLOSURE OPTIONS

STANDARD DESIGN

  • NEMA-1, NEMA 12 Ventilated, NEMA 3R Ventilated and NEMA 4 Wall- Mount, Free-Standing or MCC Mounted

  • Free-Cooling and Forced Air Cooling

  • Galvanized Interior Mounting Pan

  • Powder Coat Paint Finish: Light Grey (Standard),

*Alternate paint finish available upon request.*

  • 208/220/230 Volt, 1 or 3 Phase Input, 50/60 Hz

  • 460/480 Volt, 1 or 3 Phase Input, 50/60 Hz

  • 575/600 Volt, 1 or 3 Phase Input, 50/60 Hz

  • Three Contactor Bypass

  • VFD-OFF-Bypass Selector Switch

  • VFD Run Pilot Lamp (RED)

  • Bypass Run Pilot Lamp (RED)

  • Run/Stop Control Relay

  • Motor Overload Relay

  • NEMA Enclosure Options (1, 12, 3R and 4)

  • Fused Disconnect Switch

  • Fused 120 VAC Control Power

  • Input Reactor or Filter

  • dV/dt Filter

  • Customer Control Terminal Blocks

  • Chassis Mounted VFD

  • English Text Keypad Mounted on Cabinet Door

  • Exhaust Air Fans Cooling as Required for Heat Dissipation

  • Harmonic Filter

  • Transient Surge Protection for transient spikes up to 3000 VAC and 250 Joules

  • Input Isolation Contactor

  • VFD Output Contactor

  • Bypass Contactor with RVS Starter

  • Motor Starter Protection Relays (MSP) (for multi-motor applications)

  • Input Power Distribution Block for Top or Bottom Entry

  • Motor Power Distribution Block for Top or Bottom Entry

VOLTAGE OPTIONS

BYPASS OPTIONS

ADDITIONAL OPTIONS

Helix is vendor neutral, and open to customization, which allows Helix VFD solutions to meet the requirements of nearly all customer projects and scope of works.

VFD APPLICATIONS

  • Airports

  • Hospitals

  • Shopping Malls

  • Entertainment and Sports Facilities

  • Schools and Universities

  • Hotels and Restaurants

  • Municipal and Commercial Buildings

  • Chillers and Compressors

  • Cooling Towers

  • Boiler Circulation Pumps

  • Chill Water Circulation Pumps

  • Exhaust Fans

  • Clean Room Air Handling

  • Tunnel Ventilation

VFD POWER SCHEMATIC WITH MULTIPLE OPTIONS 

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