Pricing Guide for Horizontal Above NEMA Motors - Siemens Industry ...

Pricing Guide for Horizontal Above NEMA Motors ANSP-60000-1112Section 2Part 1Page 1Date 11/12Modifications & AccessoriesAdjustable Speed Drives (Except any TEFC Enclosure or any 2-pole in a6813 frame*)The MRPD designation for motors used with ASDs is indicated in the motor’s basic MRPD structure.Refer to the Section 1, Part MRPD for more details. Motors to be used with filtered VFDs and are 4:1 VT orare 2:1 CT have a minimum base Category 1.*Any rating in a TEFC enclosure or any 2-pole ratings in any enclosure in a 6813 frameare not suitable for use with an ASD application. Refer to your local Siemens Salesrepresentative for price and availability.Motors driven from an adjustable frequency control power source are subject to harmonicscaused by non-sinusoidal wave shapes and voltage spikes. These may result in increasedheating, decreased torque capability, and excessive shaft voltages; therefore, standard motordesigns may not be suitable. Refer exact requirements including application (variable orconstant torque), details of speed range, and type of inverter being used to your local SiemensSales representative for price and availability.Policy Statement IGBT/BRGSiemens Norwood AC Induction MotorsIGBT Control Induced Bearing CurrentsSiemens has had considerable, successful experience operating motors in the field inapplications that utilize IGBT-type adjustable frequency controls. Throughout the industry,however, a few variable frequency control applications and installations have been shown toproduce currents in the bearings of motors they control. Siemens Drives and Siemens Systemsgroups have the expertise and experience necessary to ensure the your installation isconfigured such that problem-free operation is attained. However, when Siemens motors are tobe used with controls manufactured other companies, we defer system configuration details tothat control manufacturer. If the application is such that a problem due to bearing currentscould potentially occur then one of the following solutions should be implemented with themotor and control system;a) Use of a control output filter that reduces common mode voltage and the motor non-driveend bearing should be insulated.b) For 500 frame and larger motors in non-hazardous locations, insulate the drive end andnon-drive end bearing and add a shaft grounding brush. Unless the grounding brush isprovided on the motor drive end, an insulated coupling must be utilized to protect noninsulatedbearings in the load equipment.Motors constructed in accordance with (b) are available. Consult your local Siemens Salesrepresentative for price and availability.