Baldor DBSC105-AAA-1 Installation And Operating Manual

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Baldor DBSC105-AAA-1 Installation And Operating Manual Manual pdf 14 page image

Section3–2 MN1229Overload ProtectionBaldor Controls feature UL approved motor overload protection suitable formotors that consume at least 50% of the output rating of the control. Othergoverning agencies such as NEC (National Electric Code) may require separateover current protection. The installer of this equipment is responsible forcomplying with NEC guidelines and CE directives (Conformite Europeene) andapplicable local codes that govern wiring protection, grounding, disconnects andother current protection.Wiring ConsiderationAll logic and control connections are made at the connectors shown in Figure3-1. All external wires for the control should be run in a conduit that is separatefrom power wiring. The use of shielded wire is recommended for all controlwiring.Protective DevicesBe sure a suitable input power protection device is installed.Slow Blow Fuse: Each DBSC must be fused separately. Recommended fuserating is determined as follows:Ifuse = 1.25 X InominalPower DisconnectA power disconnect should be installed between the input power source and theDBSC for a fail safe method to disconnect power. The control will remain in apowered-up condition until all input power is removed from the control and theinternal bus voltage has depleted.AC Power ConnectionsFigure 3-1 shows the connector locations.1. Connect the incoming AC power wires from the protection devices asfollows:Line 1 to connector X1 pin 2 (label “L”).Line 2 to connector X1 pin 3 (label “N”).2. Connect earth ground to X1 pin 1 (labeled “PE”) of the control. Be sure tocomply with local codes.