Table of Contents
Related Manuals for Siemens SITRANS
Summary of Contents for Siemens SITRANS
- Page 1 Introduction Overview Variable Frequency Drive SITRANS Procedure Variable Frequency Drives and Instrumentation Using Variable Frequency Drives and Instrumentation Without Interference Application examples 09/2020 AG080819...
- Page 2 Note the following: WARNING Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensure that the products operate safely and without any problems.
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Page 3: Table Of Contents
Table of contents Introduction ............................4 Objective ..........................4 Equipment ........................... 4 Disclaimer..........................4 Overview ..............................5 Variable Frequency Drive ........................6 What is a Variable Frequency Drive? ..................6 How does a VFD Work? ......................6 Procedure ............................... 7 What are the steps to minimize EMC issues from VFDs? ............ -
Page 4: Introduction
Introduction Objective The objective of this application guide is to help the user become familiar with the steps required to prevent EMC interference between VFDs and instrumentation. Equipment Equipment Description MLFB/A5E Number VFD drive and Process Instrumentation Disclaimer Note While every effort is made to verify the following information, no warranty of accuracy or usability is expressed or implied. -
Page 5: Overview
Overview This application guide describes the function of Variable Frequency Drive (VFD) and provides tips on how to prevent interference issues when VFDs are used with process instrumentation. Using Variable Frequency Drives and Instrumentation Without Interference Application examples, 09/2020, AG080819... -
Page 6: Variable Frequency Drive
Variable Frequency Drive What is a Variable Frequency Drive? A Variable Frequency Drive or VFD controls the rotation of an alternating current motor by varying the frequency of the electrical power supplied to the motor. These flexible systems provide accurate speed control and minimize energy usage by matching motor output to a required load. -
Page 7: Procedure
Procedure What are the steps to minimize EMC issues from VFDs? The operating function of VFDs causes electromagnetic noise. The high-speed switching of the inverter stage can emit significant radio frequency energy. Without mitigation, this energy can interfere with other nearby electrical equipment. Process control and sensor instrumentation is often found in the same area of a factory or process as VFDs. -
Page 8: Standards Governing Electromagnetic Compatibility (Emc) Of Vfds
Procedure 4.2 Standards Governing Electromagnetic Compatibility (EMC) of VFDs • Keep signal cables away from motors and transformers, as they can generate large magnetic fields. Magnetic fields can induce currents into nearby cables. • Follow all grounding recommendations from the VFD and instrumentation supplier. Grounding is important for both safety and noise suppression.