Siemens G85139 Installation, Wiring Guidelines to Minimise the Effects of EMI

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2. INSTALLATION

2. INSTALLATION

2.1 Wiring Guidelines to Minimise the Effects of EMI

The inverters are designed to operate in an industrial environment where a high level of Electro-Magnetic Interference (EMI) can be expected. Usually, good installation practices will ensure safe and trouble-free operation. However, if problems are encountered, the following guidelines may prove useful. In particular, grounding of the system 0V at the inverter, as described below, may prove effective. Figure 1 illustrates how an RFI suppression filter should be installed.

(1)Ensure that all equipment in the cubicle is well earthed using short, thick earthing cable connected to a common star point or busbar. It is particularly important that any control equipment that is connected to the inverter (such as a PLC) is connected to the same earth or star point as the inverter via a short, thick link. Flat conductors (e.g. braids or metal brackets) are preferred as they have lower impedance at high frequencies.

The return earth from motors controlled by the inverters should be connected directly to the earth connection (PE) on the associated inverter.

(2)Wherever possible, use screened leads for connections to the control circuitry. Terminate the ends of the cable neatly, ensuring that unscreened wires are as short as possible. Use cable glands whenever possible.

(3)Separate the control cables from the power connections as much as possible, using separate trunking, etc. If control and power cables cross, arrange the cables so that they cross at 90° if possible.

(4)Ensure that contactors in the cubicle are suppressed, either with R-C suppressors for AC contactors or ‘flywheel’ diodes for DC contactors,fitted to the coils. Varistor suppressors are also effective. This is particularly important if the contactors are controlled from the relay on the inverter.

(5)Use screened or armoured cables for the motor connections and ground the screen at both ends via the cable glands.

(6)If the drive is to be operated in an Electro-magnetic noise-sensitive environment, the RFI footprint filter kit should be used to reduce the conducted and radiated interference from the inverter. For optimum performance, there should be a good conductive bond between filter and metal mounting plate.

On no account must safety regulations be compromised when installing inverters!

G85139-H1750-U049-B

© Siemens plc 1997

26/09/97

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Contents Micromaster Safety Instructions Overview Installation Wiring Guidelines to Minimise the Effects of EMIExample of an RFI Suppression Filter Installation Ideal Installation Mechanical InstallationHazard MMxxx MMxxx/2 Model MMxxx/3 500Frame Sizes All measurements in mm 141 160 175 184 149 172 174 138 215 185 195 204 232Electrical Installation Power and Motor Connections Frame Size aSingle Phase Power ConnectionsPower and Motor Connections Frame Size B Power Connections Access Diagram Frame Size BPower and Motor Connections Frame Size C Power Connections Access Diagram Frame Size CFront Panel RS485 D-type Control ConnectionsControl Terminal Block Block Diagram Motor Overload ProtectionFront Panel Controls & Basic Operation Front Panel ControlsInitial Testing Basic OperationGeneral Refer to for a full description of each parameterStep /Action Basic Operation 10 Step GuideButton Display Operating Modes 4.1 Digital Control Analogue ControlStopping the Motor Local and Remote ControlIf the Motor Does Not Start Up Hardware Setup Parameter SettingsClosed Loop Control General DescriptionSystem Parameters P000 Function RangeOperating display Description / NotesP004 ∙ P005 ∙ P006 P007P009 ∙ FunctionP011 P012 ∙ P013 ∙ P014 ∙ P015 ∙P016 ∙ P017 ∙ P018 ∙P022 ∙ P023 ∙ P024 ∙P027 ∙ P028 ∙ P029 ∙ P031 ∙ P032 ∙ See P014P046 ∙ P047 ∙ P048 ∙ P050 P041 ∙ P042 ∙ P043 ∙ P044 ∙ P045P050 = P050 = 6 or P051 P052P053 P056P061 P062P063 P064P073 ∙ P066P074 ∙ P076 ∙ P077 Inverter output terminals with power offP079 ∙ P081 P082 P083 P084 P085 P089 ∙ P091 ∙ P112 P111P113 P121 P122P123 P124P944 P947 P958 P963 P967 P968 P970 P971 ∙ Eeprom storage controlFault Codes Fault CodeF151 F153 CauseSpecifications 16-8BB40 21-0BC40Options / Accessories Appropriate manner see .1Please contact your local Siemens sales office forSetup procedure for a simple application Supplementary InformationApplication Example USS Status CodesElectro-Magnetic Compatibility EMC Class 1 General IndustrialEMC Phenomenon StandardIEC 1000-2-4 ENV 50 Class 2 Filtered IndustrialStandard Level Environmental Aspects Model NoEMC Class Filter Class Filter Part NoUser’s Parameter Settings P702 P880P910 P918 P922 P923 P927 P928 P930 P931 P944 P947 P958 P963 P967 P968 P970 P971Bestell-Nr SE9286-4AA86
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