Comprehensive Soft Starting Solutions for Pump and Compressor Applications Cognito Quam Electrotechnologies Ltd
When compared to the alternatives, the cost and operational advantages are numerous:
* Very high efficiency and practically lossless motoring operation when combined with a bypass contactor,
* Smooth, noise-free, reduced load starting current ensures minimal plant wear and a quieter operating environment. Hydraulic shock (or “hammer”) is eliminated when accelerating or decelerating a pump load.
* Their simple and non-demanding installation requirements save time, money and effort. When upgrading an existing installation, typically a star/delta circuit, no additional rewiring from the line or to the load is needed.
* The bookcase style enclosure’s small footprint further saves cabinet space and real-estate.
* Protection is complete and user-programmable against all contingencies: overloads, underloads (typically caused by a broken transmission belt or a dry pump), disruptive phase sequence/line faults and internal overheating (typically caused by blockage in the cooling flow inlet or outlet). Faults from any phase to the ground are detected as load current is monitored in each phase line. As a result robust and dependable operation is ensured.
* The versatile and galvanically isolated control input and output interface allows for integration within any PLC-based system or simple two command start/stop operation.
* The provided 24 VDC supply can power local sensors or other small automation devices.
* Power to the soft starter control circuits can be separate from the three-phase power line enabling continued normal monitoring/control operation while the power circuit is down.
* Optional network connectivity is available for integration in distributed control systems.
21 November 2011
