Struthers-Dunn Expands The Motor Control Contactor Offering To Include Solid State Technology

Historically, the Struthers-Dunn name has been associated with exceptional performance and operational durability in motor contactors and unique relay applications. Our new generation of 645 Solid State Motor Control relays exemplifies the future of Struthers-Dunn and its pursuit of providing technologically advanced devices while maintaining competitive prices.

The 645 series is a UL approved 3 phase motor controlling contactor that relies on 100% Solid State technology. There are no moving parts to wear out and no contacts to weld under heavy operation. The relay is designed to accommodate high power motor loads (up to 75 Amps at 480 VAC) with frequent cycling (10M operations). The 645 footprint provides an excellent solution to the space constraints required by today’s multi-phase motor control or heater applications. Typical applications include industrial compressors and HVAC systems.

The 645R version is a dual input motor reversing relay designed specifically for hoists, commercial doors and heavy machinery controls. This unique relay utilizes AC or DC controlled Solid State devices for reversing phases on three phase loads. Similar to the rest of the 645 line, random turn on or zero cross construction is also available in the 645R Series.

To view the 645RT Solid State Motor Reversing Specifications and other Solid State motor control solutions click on the Motor Reversing Section on our homepage. From our site you are also able to download the 645RT CAD drawing or 3D models from any one of 29 CAD Formats.

Comments

Post a Comment

Popular posts from this blog

What is Class I Division 2?

Image
A Class I Division 2 is a location: (1) In which volatile flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are handled, processed, or used, but in which the liquids, vapors, or gases will normally be confined within closed containers or closed systems from which they can escape only in case of accidental rupture or breakdown of such containers or systems or in case of abnormal operation of equipment, or (2) In which ignitable concentrations of flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are normally prevented by positive mechanical ventilation, and which might become hazardous through failure or abnormal operation of the ventilating equipment. Class I Division 2 Classification Class I Division 2 refers to the ANSI/ISA 12.12.01 standard. This standard was previously UL1604 until UL recommended the newer ANSI/ISA standard be used and that all hazardous location products be certified under this standa
Read more

FUSE SIZING CONSIDERATIONS FOR HIGHER EFFICIENCY MOTORS

Image
When selecting the proper fuse for short circuit protection in motor starting applications, it is important to not only ensure that the fuse will not nuisance open during motor start up times, but also that the fuse will coordinate as required with overload relays. When sizing fuses between 125% and 150% of the motor nameplate current, several advantages, including ease of coordination with an overload device, a smaller disconnect, and increased short circuit protection from a lower fuse rating, can be achieved. However, if sizing at this level prevents the motor from starting, it may then be necessary to increase the fuse ampere rating and it then becomes important to know the NEC sizing limitations. As of June 1, 2016, the US Department of Energy has mandated that newly manufactured electric motors will need to meet NEMA Premium® efficiency standards. As motor efficiencies increase, motor locked rotor currents can also be expected to increase. In addition to this, with across-the-lin
Read more

7/8 16UN Connectors that Provide 600 Volts and 15 Amps

TURCK announces new A-Size 3 and 4-pin 7/8 16UN powerfast™ connectors that provide up to 600 Volts and 15 Amps of power. These IP67 rated connectors provide a modular wiring system designed to handle high current applications for machine power distribution, while providing resistance to vibration commonly associated with conveyors, motors and material handling applications. The cordsets are available with a tray rated, exposed run PVC flexlife ® cable, with or without STOOW rating, and 14 AWG wires that allow you to replace hard wiring with a robust, quick disconnect system that saves the time and money spent installing a conduit system. The A-Size powerfast line offers male and female, straight connectors, standard and custom lengths, and pigtails or extensions. To make the system complete, fully encapsulated mating receptacles, with 1/2”-14 NPT mounting threads are available.
Read more