Water and Wastewater Industry
Application Expertise
| Stop! Don't Use That Part Frightening trends in counterfeiting, cloning, and reconditioning can jeopardize a water or wastewater plant’s reliability, putting facilities’ personnel at risk of harm, or death. It’s important to be aware of these hazards when dealing with electrical suppliers. >Click here to view; right-click to download. |
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| Protective Relaying for Water and Wastewater Treatment Plants The effects of faults and abnormal conditions in electrical power systems can be severe. Hence, protective relay systems must be designed carefully with the ability to protect against the worst possible fault conditions. >Click here to view; right-click to download. |
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| Comparison of MV and LV Adjustable Speed Drive Retrofits for Water and Wastewater Facilities Traditional power system design suggests that the motor crossover from low voltage to medium voltage is in the 200 to 500 HP range. Adjustable speed drives may have increased the upper limit of the crossover. >Click here to view; right-click to download. |
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Protective Relaying for Water & Wastewater Treatment Plants
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| Planning for Automation System Upgrades: Total Replacement versus Phased Migration This WaterWorld front-page editorial explains how municipalities can choose between a complete, phased or partial migration. This flexibility allows municipalities to evaluate the scope and cost of their migration project and better manage it to fit their maintenance schedule, downtime and budget. >Click here to view; right-click to download. |
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| A Comparison of Circuit Breakers and Fuses for Low-Voltage Applications A feature-by-feature comparison of the merits of circuit breakers vs. fuses on low-voltage systems operating at 600 V or below. >Click here to view; right-click to download. |
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| Simple Mistakes Lead
To Harmonic Distortion Problems In Water Treatment Plant An overview of the causes of harmonic distortion and recommended solutions in ozone treatment applications. >Click here to view; right-click to download. |
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| Electrical Equipment and Components in Adverse/Corrosive Environments The information in this bulletin reminds users of environmental restrictions for the installation of electrical equipment and components in a corrosive environment. >Click here to view; right-click to download. |
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| Loading Considerations When Paralleling Transformers Loading considerations for paralleling transformers are simple unless kVA, percent impedances, or ratios are different. >Click here to view; right-click to download. |
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| Generator Loading, Harmonics Monitoring and Mitigating Analysis in a Water Treatment Plant The use of harmonic simulations to estimate the reduction in harmonic current that could be achieved byspecific modifications. >Click here to view; right-click to download. |
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| Simple Mistakes Lead to Harmonic Distortion Problems in
Water Treatment Plant This paper offers simple calculation methods to predict problems in advance and outlines solution options to reduce operating problems in a WWT facility. >Click here to view; right-click to download. |
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| Impact Of Instruments, Sensors,
& Switches On an Automation System An overview of proper control system interface and instrument selection. >Click here to view; right-click to download. |
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| VFDs can Help Reduce Aeration Basin Energy Costs This WATERWORLD editorial explains how a properly balanced aeration basin control scheme using variable frequency drives to control the blowers can help achieve considerable energy savings. >Click here to view; right-click to download. |
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| Well-conceived
Energy Action Plans Can Mean
Significant Savings in Cost and Energy Use Energy Action Plans facilitate optimum performance while controlling costs and maintaining production. >Click here to view; right-click to download. |
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| Power
System Harmonic Mitigation for Water and Wastewater Treatment
Plants This paper reviews the nature and sources of harmonics for water and wastewater treatment plants. >Click here to view; right-click to download. |
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| Arc
Flash in the Water/Wastewater Industry: No Longer
an Emerging Issue While water treatment and wastewater treatment facilities have sometimes been viewed as being outside the requirements of new arc flash standards, this perception is rapidly changing. >Click here to view; right-click to download. |
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| Soft-Start
Controller with Torque Control can Reduce Water Hammer, Maintenance
Costs This article outlines the use of a torque-controlled soft-start controller for pump motors to reduce the severity of water hammer during pump cycling. >Click here to view; right-click to download. |
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