ABB launches compact softstarter range for small to medium sized motors 
(08/11/2006)
ABB has expanded its softstarter range with the launch of a compact version for small to medium sized motors. Designed for motor currents from 3 to 45A, and motor voltages of up to 600V, the PSR compact softstarter complements ABB’s existing PSS and PST ranges for applications from 3A to 1050A.
The PSR softstarter is available in three physical sizes and nine current ratings, with widths ranging from 45mm to 54mm, making it suitable for installation in confined spaces. To help simplify installation, the PSR can be either screw-fitted or mounted onto DIN rails.
Ideal for pump, fan, mixer and conveyor applications, the PSR Softstarter range is designed to minimise starting currents and reduce the risk of current spikes in small to medium-sized motors. This helps to minimise the impact of motor starting on the electrical network and also prolongs the life of mechanical components.
As well as standard indicator lights showing operational status, PSR softstarters also offer several indicator and control possibilities. Three potentiometers located on the front of the PSR, provide users with control over motor starting and stopping.
Two of the potentiometers can each be set to control motor ramp up and ramp down times. This is particularly helpful for pump applications, where the gradual slow-down of the motor is required to prevent ‘hammering’. A third potentiometer enables the user to set the initial voltage of the PSR softstarter required to start a motor.
Two types of signal relays are also supplied with the PSR softstarter. All three frame sizes have a run relay, which indicates that the PSR is running. In addition, the two larger-sized PSRs have a Top of Ramp (ToR) relay. The ToR indicates when a top speed has been reached so that the load can be switched on, useful for applications such as compressors where a motor needs to be up to speed before the load is applied. The PSR also benefits from having built in bypass contacts, which leads to reduced power losses whilst the motor is running at speed, and reduced heat build up.
The PSR range can manage ten starts per hour. If greater starting capacities are required, an auxiliary cooling fan is available, enabling starting capacity to be increased to 20 starts per hour.
The PSRs can also be controlled remotely with the addition of ABB’s fieldbus plug, which enables simple and fast connection to any existing protocol in the FieldBusPlug range through an optional ‘neutral’ fieldbus-independent interface.
Available through ABB’s Strategic Industrial Partner network, as well as existing softstarter alliance partners, the PSR provides a compact device for OEMs and panelbuilders serving the food and beverage, process and automation and water treatment industries.
Related categories: Contactors and Starters Industrial
