Baldor MN735 manual Ungrounded Distribution System, Input Power Conditioning

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Cover Removal To connect power and signal wires, the cover must be removed. This procedure describes how to access all terminal connections inside the control.

Using your thumbs, press in and slide the cover down as shown in Figure 3-2.

Figure 3-2 Top Cover Removal

1. Press in to release cover

2. Slide cover down and remove.

Power Conditioning

System Grounding Baldor Controls are designed to be powered from standard three phase power lines that are electrically symmetrical with respect to ground. System grounding is an important step in the overall installation to prevent problems.

Ungrounded Distribution System

With an ungrounded power distribution system it is possible to have a continuous current path to ground through the MOV devices. To avoid equipment damage, an isolation transformer with a grounded secondary is recommended. This provides three phase AC power that is symmetrical with respect to ground.

Input Power Conditioning

Baldor controls are designed for direct connection to standard three phase lines that are electrically symmetrical with respect to ground. Certain power line conditions must be avoided. An AC line reactor or an isolation transformer may be required for some power conditions.

SIf the feeder or branch circuit that provides power to the control has permanently connected power factor correction capacitors, an input AC line reactor or an isolation transformer must be connected between the power factor correction capacitors and the control.

SIf the feeder or branch circuit that provides power to the control has power factor correction capacitors that are switched on line and off line, the capacitors must not be switched while the control is connected to the AC power line. If the capacitors are switched on line while the control is still connected to the AC power line, additional protection is required. TVSS (Transient Voltage Surge Suppressor) of the proper rating must be installed between the AC line reactor or an isolation transformer and the AC input to the control.

MN735

Receiving & Installation 3–3

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Contents Series 35D Inverter Control MN735Table of Contents Appendix a Appendix BPower and Motor Connections Section Quick StartRemote Mode Size 1 and 3 Terminal StripsPower Connection Descriptions Thermistor Connection to motor thermistorAnalog/Digital Signal Descriptions Terminal Signal Name Description RangeLimited Warranty Section General InformationOn next Product Notice Intended useCould result in damage to property Precautions To prevent equipment damage, be certain that the input power Location and Mounting Section Receiving & InstallationReceiving & Inspection Watts Loss Ratings Catalog No Output Current Inverter SizesUngrounded Distribution System Power ConditioningInput Power Conditioning Impedance + Unshielded and Shielded Couplings Clamp TerminalWire Size AWG MM2Power Connection Descriptions Power and Ground Connections Size 2 Shown Resistance thresholds are Rising temperature trip resistance One control to PE Receiving & Installation MN735 External Brake Resistor Keypad Mode Keypad Connection DiagramStandard Run 3 Wire Mode Standard Run Connection DiagramSpeed 2 Wire Mode Related Parameters10 Epot Connection Diagram 11 Epot Connection Diagram PID 2 Wire Mode 12 PID Connection DiagramReceiving & Installation MN735 Section Start-Up and Operation Keypad DescriptionDrive Status Indications shown on keypad Diagnostics MenuDisplay Menu Level Remote to Local Reset to Factory Settings 2 button ResetSelect Local or Remote Password Protection Quick Application SelectionDisplay Parameter Description Range Factory Setting Parameter DefinitionsDisplay Parameter Description Range PI P Gain Analog Output Relay Invert =FALSE =TRUE Integral P502 Method for Setting-up the PI GainsProportional Gain P501 Power Dependent Parameters Inverter Size Factory Setting CurrentMaterial Recycle Disposal Routine MaintenanceSaving Your Application Data PackagingTrips Section TroubleshootingReset a Trip General Failures DC Link RippleSection Specifications & Product Data General SpecificationsAnalog Inputs Control SpecificationsKeypad Display Relay Output Analog OutputsDigital Inputs Ratings CatalogDimensions 460VAC 3 Phase Controls Size 2 and 3 460VAC Size 1 and 2 230VAC 1 PhaseSize 3 230VAC 3 Phase Appendix a Dynamic BrakeTable A-1 External Brake Resistor Selection CE Declaration of Conformity Wiring of Shielded Screened CablesAppendix B CE Guidelines EMC Conformity and CE MarkingEMC Wiring Technique CabinetEMC Installation Instructions Cable Screens GroundingInput Signal Cable Grounding Tion Date 1/5/02 EC Declarations of ConformityStandard EMC Directive CE Guidelines MN735 Box Ft. Smith, AR 479 Fax 479  Baldor Electric Company MN735 02 C&J