Baldor Baldor, MN850 manual AC Main Circuit

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AC Main Circuit

Power Disconnect A power disconnect should be installed between the input power service and the control for a fail safe method to disconnect power.

Protective Devices Recommended fuse sizes are based on the following: 175% of maximum continuous current for time delay.

300% of maximum continuous current for Fast or Very Fast action.

Note: These general size recommendations do not consider harmonic currents or ambient temperatures greater than 40° C.

Be sure a suitable input power protection device is installed. Use the recommended circuit breaker or fuses listed in Table 2-5 (Wire Size and Protection Devices). Input and output wire size is based on the use of copper conductor wire rated at 75 ° C. The table is specified for NEMA B motors.

Circuit Breaker:	3 phase, thermal magnetic.
	Equal to GE type THQ or TEB for 230VAC or
	Equal to GE type TED for 460VAC and 575VAC.
Fast Action Fuses:	230VAC, Buss KTN
	460VAC, Buss KTS to 600A (KTU for 601 to 1200A)
Very Fast Action:	230VAC, Buss JJN
	460VAC, Buss JJS
Time Delay Fuses:	230VAC, Buss FRN
	460VAC, Buss FRS to 600A (KLU for 601 to 1200A)

2-4 Installation

MN850

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Contents Digital Soft-Start Table of Contents Appendix B Appendix aAppendix C Appendix DLimited Warranty Section General InformationIntroduction Precautions Safety NoticeReceiving, Inspection and Storage Section InstallationPhysical Location Air Flow Clearance RequirementsCover Removal Tools Required Mounting Instruction For tapped mounting holesMounting Instructions For clearance mounting holes AC Main Circuit Connection Descriptions UL Required Fuses for Short Circuit RatingCatalog Number Motor Overload and Thermal Protection Control SupplyBaldor Digital Soft-StartBaldor Digital In-Delta Soft-Start Connections45x20 NEC Wire Size and Protection DevicesThree Wire Control Two Wire Control115 / 230VAC 115/230VAC Top of Ramp Bypass ConnectionTo AC Input Motor Reversing ConnectionShock Mounting InstallationSection Operation Pre-Start ChecklistOverview Sure to check the following itemsKeypad Mode Switch System Program Menu Data Status Entry Start-Up ProcedureKeypad Operation Action Description Display CommentsMenu Mode System Status Mode Description Display CommentsData Entry Mode Operating ModesMenu Structure Menu Structure DiagramMenu Navigation Menu Navigation ExamplesSave Param Motor Starting Definitions Term Motor Starting Key TermsApplications Auto Features Remote Start and Running the Motor Optimising CurrentStopping the Motor Motor Stopping Definitions TermMenu Descriptions Section Parameter IndexBasic Menu Applications MenuParameter Index MN850 Advanced Menu Auto Features Menu Password Menu Permanent Store MenuInputs Menu Outputs Menu Parameters MenuTrips Menu Parameter Description Title Parameter Description Parameter DescriptionsRatedCurrent x Example P52 User Flags Definition Preset ValueK3 BIT Mask Missing. Check fuses etc Second of a start request is forced to 0 stop time Thermal Switch 2 Over temp . Prevents re-start if set , Off Fault Trip Messages Section TroubleshootingPower Off Checks Preliminary ChecksIndication Corrective Action Troubleshooting Guide230/460VAC 3 Phase Electrical Noise Considerations Analog SignalsRelay and Contactor Coils Special Motor ConsiderationsIdentification Section Specifications and Product DataInput Ratings Storage ConditionsOperating Conditions 230V 460V 575V Size Mounting Dimensions10.43 265 Mounting Dimensions 151 200 100 105 12.68 24.45 10.87 Specifications and Product Data MN850 Appendix a CE Guidelines Wiring of Shielded Screened CablesCE Declaration of Conformity EMC Conformity and CE MarkingControl Cable Screens Grounding EMC Installation InstructionsAppendix MN850 Appendix B Parameter Values Title Parameter Adjustable Range Factory User SettingApplications MN850 MN850 Applications B-3 Section General Information Voltage Independent Parts Description Appendix C Replacement Parts575VAC Parts Description Grounding Appendix D Voltage Surge ProtectionVoltage Surge Protection MN850 Grounded or Symbol High Resistance Ground Control EnclosureTable D-1 Baldor MOV Specifications Corner or Center-Tap Symbol Grounded Control EnclosureVoltage Surge Protection MN850 Appendix E Remote Keypad Mounting Template 500340 810 500 250  Baldor Electric Company MN850 03 C&J1500 Baldor Electric Company