ABB-MNS iS design aspects MNS iS power modules MStart

ABB-MNS iS design aspects  MNS iS power modules MStart

Module options Available options for the selection of MStart  modules are: • Starter types: - Non-reversing Direct Online (NR-DOL) - Reversing Direct Online (REV-DOL) - Heavy Duty (HD) - Star-Delta (NR-S/D) - Contactor Feeder (CF) - Feeder (Energy distribution module) • Rated voltages: 400V, 500V, 690V • Short circuit protection device (SCPD):  fused, fuseless For more information on the available module  types, please refer to the module selection tables  in the Technical Data section. Withdrawable modules MStart The withdrawable design of MStart provides a  maximum of plant and operator safety. As per definition in IEC 61439 series,  withdrawable modules can be electrically  connected and disconnected (“withdrawn”).  This is applicable to the main incoming circuit,  the main outgoing circuit as well as the auxiliary  circuits. MStart modules can be withdrawn  without the help of a specific tool. MStart are  standardized components, ready-to-use and offered for a wide range of motor starter ranges  and applications leading to maximum flexibility. The high device packing density allows a  comparatively low footprint of the MCC. Main characteristics • Multi-functional operating handle connecting  to module interlocking mechanism • Ergonomic module handle to withdraw  the module • Motor status display (4 LED) integrated in  module front • Module rear wall with integrated contact  system and sensors • Control terminal block MStart comprises the power and control  circuit together with the measurement  functionality. Scalable control, protection  and monitoring functionality is taken over  by the allocated MControl located in the  control cable compartment. System highlights • Standardized motor starter and  feeder modules • MStart can be replaced while switchboard  is energized • Patented shunt sensor technology • Power loss reduction due to separation of  control components permits high-density  module arrangement in the switchboard • Halogen free cabling

MNS IS MOTOR CONTROL CENTER SYSTEM GUIDE Fixed Modules MStart Fixed modules are utilized for motor starting  solutions where a rating is in excess of 250 kW.  The motor starter components such as the  switching device, contactor and shunt modules  are mounted in the main compartment.  The MControl and field I/O connections are  located either in the upper compartment or lower  compartment, dependant upon the cable entry  requirements. For example, when cable entry is  from below the MControl is located in the upper  compartment and vice versa.

MNS iS design aspects  Module connection to  distribution bars Power contact Connection to the distribution bars is realized  using the precision-engineered MNS power  contacts. The power contact is characterized by a  turn-able bearing, thus decoupling cable stress  and electrical contact. Consequently any cable  bending forces cannot affect the stability of the  power contact. The mechanical stabilisation is taken over by  the supporting plate and the contact spring  where the contact fingers ensure positive  electrical contact. Contact fingers are silver  plated as standard. The contact has been subjected to several tests in  order to prove the sophisticated design and the  high quality: • Verification by testing acc. IEC 61439 series • Corrosion test acc. DIN 50017 and  IEC 60068-2-60 • Crimping quality check acc. IEC 61238-1 • Vibration and shock test acc. IEC 60068-2-6  and IEC 60068-2-27 A condaptor unit facilitates the horizontal  distribution of power from the vertical  distribution bars for 6E/4 and 6E/2 modules, see  illustration on page 35. The condaptor enables  the modules to be located adjacently within the  same horizontal position of the cubicle.  Modules of size 6E and above are connected  directly to the vertical distribution bars. System highlights • Although IEC 61439 series requires 200  connection cycles only, the MNS contact system  is tested, certified and proven for contact cycles  (plug in/unplug) up to 1.000 • The contacts are silver coated as standard • Full individual phase segregation assured prior  to the connection of the power contact.  See illustrations on the following page