Saving the Best for Last! - Download PDF
Softstarters or variable-speed drives, or both? Energy efficiency is a very important aspect that customers seek in products and systems and something that suppliers work hard at improving in their product offering. In fact, the general view held is that the investment linked to the purchase of electrical equipment, as well as the downtime cost incurred from installation and commissioning is offset by a decrease in electricity consumption due to energy efficient operation.
Like in water applications, centrifugal pumps are driven by an induction motor directly fed from the network. Flow regulation is accomplished by a few different means, namely throttling, a highly inefficient method as hydraulic losses increase dramatically when the flow is strangled by a valve; variable-frequency drives (VFD), recommended as an effective means of saving energy, ensure flow regulation by controlling the rotational speed of the motor shaft; and alternatively, on and off pump operation following a precise duty cycle – the pump is not operated continuously, but switched on for the time needed for pumping the target water volume and disconnected for the rest of the time. Given that many different hydraulic systems recommend the use of frequency converters or cyclic control (ie, softstarter technologies), which one of these two solutions is the most cost-effective in reducing energy consumption and providing the most satisfactory payback time?
- Juan Sagarduy, Jesper Kristensson, Sören Kling, Johan Rees (ABB Corporate Research)
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Choosing The Right Motor Control and Protection Components – Download PDF
SCHNEIDER ELECTRIC WHITEPAPER
Amid mushrooming global demand for energy and increasing concern for the environment, countries around the world are implementing tighter environmental restrictions. Industrial motors, a major global consumer of electricity, are one of the prime targets of the new regulations and standards.
The transition to IE3 premium efficiency motors and IE4 super premiumefficiency motors is underway, raising challenges for businesses. However, these challenges also bring opportunities for businesses to reduce energy costs and increase efficiency while lightening their impact on the environment.
To make the right motor starter choices and ensure maximum energy efficiency, it is important to be aware of how IE3 premium efficiency motors behave during starting and the impact this behavior can have on protective devices. Schneider Electric TeSys motor starter products (motor circuit breakers, overload thermal relays, and contactors) have undergoneextensive laboratory testing with different motor brands to confirm their compatibility with IE3 and IE4 motors.
The guidelines in this white paper are designed to help you make the right choices according to your electrical installation and motor.
All information and documents are owned by Schneider Electric