Teledyne Relays Announces Four Induction Motor Softstarters for Industrial Applications
HAWTHORNE, Calif. (February 21, 2003) - Teledyne Relays today introduced four three-phase induction motor softstarters that can be used as alternatives to costly and relatively large variable speed controllers.
The solid-state Series EMC softstarters are designed for applications such as conveyors, elevators, escalators, pumps, compressors, lamps, fans, cranes and three-phase motor applications, according to Antonio Gallegos, product marketing engineer.
The EMC softstarters prevent motors from experiencing the stress of high inrush currents - typically six to nine times nominal values - that can cause costly electrical and mechanical damage to the motors and machinery. Problems arising from high inrush currents include overheating, voltage dips, wasted power, excessive noise and contactor wear, and premature electrical or mechanical failure.
The EMC softstarters feature a six-thyristor structure that works like a full-wave phase angle controller (both positive and negative cycles are controlled). They reduce the induction motor starting current as well as the motor starting torque. Motors reach operating speeds gradually - improving the efficiency of the power used, avoiding voltage fluctuations that lead to power variations or "flicker," and minimizing mechanical stress.
The four Teledyne devices offer numerous user settings. Initial torque can be set from 0 to 100 percent. A bypass option is available, as is a PNP or NPN control option. Users also can select a kick option of 0 to 100 milliseconds when choosing not to perform a soft start.
The EMC softstarters include a soft-stop capability that allows motors to switch off slowly, reducing the possibility of damage to both motors and equipment. The duration can be set manually up to 64 seconds.
The units also feature electrical and visual diagnostic and self-test functions to assist with machine maintenance as well as to help lower costs and to reduce delays of restarting equipment.
The EMC softstarters fit existing applications without any modification of the wiring field configuration. They can replace electromechanical star-delta starters without changing the motor coupling.
The devices may be implemented like standard three-phase electromechanical contactors for induction motors. Because they can be installed inside the delta wiring, they can drive 1.73 times more current than a standard online softstarter.
Each unit can be mounted on a DIN rail or attached with screws.
The EMC softstarters include a base model, two with heat sinks and one with a heat sink and fan:
- EMC48S50-01 - This model operates at 200 to 480 Vac, 2.2 kW (star) and 3.8 kW (delta). It measures 3.268 x 4.331 x 2.913 inches (83 x 110 x 74 mm) and weighs 21.16 ounces (600g).
- EMC48S50-02 - This model operates at 200 to 480 Vac, 7.5 kW (star) and 13 kW (delta). With heat sink, it measures 3.268 x 4.331 x 6.102 inches (83 x 110 x 155 mm) and weighs 52.9 ounces (1500g).
- EMC48S50-03 - This model operates at 200 to 480 Vac, 11 kW (star) and 19 kW (delta). With heat sink, it measures 4.331 x 4.331 x 6.102 inches (110 x 110 x 155 mm) and weighs 70.55 ounces (2000g).
- EMC48S50-04 - This model operates at 200 to 480 Vac, 15 kW (star) and 26 kW (delta). With heat sink and fan, it measures 4.331 x 5.551 x 6.102 inches (110 x 141 x 155 mm) and weighs 91.71 ounces (2600g).
Pricing ranges from $284 to $395 in quantities of 500 units. Lead time for delivery is stock to eight weeks.
For more information, call (800) 284-7007, visit www.teledynerelays.com or send e-mail to relays@teledyne.com.
Teledyne Relays, a unit of Teledyne Electronics and Communications, has been the world leader in manufacturing ultraminiature electromechanical and solid-state switching products for more than 40 years. The company's comprehensive product line - including 31 new products released in 2002 - meets a wide range of requirements for industrial, commercial, military and aerospace uses.
Teledyne Relays has introduced four three-phase induction motor softstarters that can be used as alternatives to costly and relatively large variable speed controllers. The solid-state Series EMC softstarters are designed for applications such as pumps, fans, compressors and conveyors. In addition to the base model (shown above), there are two with heat sinks and one with a heat sink and a fan.
