Electrical Power & Protection


A soft starter leading product evolution

October 2016 Electrical Power & Protection

PSTX is designed to address some of the most common electrical problems associated with starting motors. It both reduces starting current at the same time as it keeps the motor protected from both load and network irregularities – a great component in any motor starting panel.

The built-in earth fault protection detects if there is an earth fault in the motor connection that may lead to damage. The current limiting function detects if the current has exceeded the set trip level and prevents heavy loads from creating unnecessary electrical stress during start. Reduced current allows OEMs to install the motor in more networks, since motor protection will prolong the equipment’s life.

Improving installation efficiency for panel builder and distributors

Installing and using the PSTX is made fast and easy, saving time for everyone involved in installation and commissioning. Initial design decisions made were done so as to consider all aspects of the purchasing, operating and servicing life-cycle of the product.

With PSTX, much of the functionality typically required for most applications is already built-in. The bypass will reduce both energy consumption and heat generation while running motors at full speed. Having it built-in saves both time on installation and space inside the panel.

The PSTX also has a detachable keypad that is easy to use, saving time during commissioning and operation. PSTX soft starter is a complete motor starter solution in a compact package.

Increasing application productivity for end-users

PSTX takes motor starting to the next level, making it possible to get more out of the process and through being more flexible. The PSTX also reduces the wear-and-tear on motor and equipment, saving time and money expended for service and maintenance.

With all its included functions such as torque control to avoid water-hammering, jog with slow speed to rotate the motor both slowly forward and in reverse, as well as the possibility to clean a pump by reversing the flow, PSTX is a complete motor starting solution. To increase reliability of the process, PSTX includes a limp mode that will allow the continuing of operation even when a thyristor has failed. As a result, the end-user enjoys improved productivity and full-potential motor usage.

ABB’s range of low-voltage soft starters has taken an enviable track record of motor reliability, installation efficiency and application productivity to a new level.

For more information contact Paul Louw, ABB South Africa, +27 (0)10 202 5916, paul.louw@za.abb.com, www.abb.com/za



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