LSA 49.1 IC6 / LSA 49.1 IC8

Enclosed air/air or water-cooled alternators for special applications

LSA 49.1 IC6 / LSA 49.1 IC8

The best of performance
The LSA 49.1 IC6 / LSA 49.1 IC8 Nidec Leroy-Somer are totally enclosed air or water-cooled alternators for special applications.

LSA 491 IC6 / IC8

LSA 49.1 IC6 cooling is performed by an air/air exchanger
(cooling index: IC6A1A1 in accordance with standard IEC 60034-6).

LSA 49.1 IC8 cooling is performed by an air/water exchanger
(cooling index: IC8A1W7 in accordance with standard IEC 60034-6).

As an option, they can be ATEX (Explosive Atmosphere) certified in accordance with EEXem II T3 protection.

Standards
Nidec Leroy-Somer LSA 49.1 IC6 / LSA 49.1 IC8 alternators meet all key international standards and regulations, including IEC 60034, NEMA MG 1.32-33, ISO 8528-3, CSA C22.2 n°100-14 and UL 1446 (UL 1004 on request). Also compliant with IEC 61000-6-2, IEC 61000-6-3, IEC 61000-6-4, VDE 0875G, VDE 0875N and EN 55011, group 1 class A for European zone.
Nidec Leroy-Somer LSA 49.1 IC6 / LSA 49.1 IC8 alternators can be integrated in EC marked generator sets, and they bear EC, EAC and CMIM markings.
They are designed, manufactured and marketed in an ISO 9001 and ISO 14001 quality assurance environment.

Electrical characteristics and performances

  • Class H insulation
  • 2/3 pitch winding (3 wires + neutral), standard 6-wire (6S)
  • Voltage range:
    - 50 Hz : 380V - 400V - 415V
    - 60 Hz : 440V - 480V
    Other voltages: consult us
  • High efficiency and motor starting capacity

Mechanical construction

  • Compact and rigid assembly to better withstand generator vibrations
  • Steel frame
  • Steel endshields and cast iron spacers for air intake and outlet
  • Two-bearing configuration
  • Half-key balancing
  • Regreasable bearings
  • Standard direction of rotation: clockwise when looking at the drive end view

Protection system and options:

  • The LSA 49.1 IC6 / LSA 49.1 IC8 are enclosed alternators IP 55
  • Space heater and stator thermal protection (PT100)
  • Steel frame of LSA 49.1 IC6 / LSA 49.1 IC8 exchangers

Depending on environments, several protection systems are available:

For the range LSA 49.1 IC6 (Air-cooled) in standard:

  • Exchanger with steel or aluminium tube
    Options:
  • Exchanger with stainless steel tube
  • Exchanger with stainless steel tube and stainless steel end plates
  • A complete stainless steel exchanger

For the range LSA 49.1 IC8 (Hydro-refrigerated):

  • Land application / freshwater, non-saline atmosphere:
    Exchanger with single tube Cu (SF Cu F25)
  • Marine application / seawater, saline atmosphere:
    Exchanger with double tube: Cu (SF Cu F25) outside tube and Cupronickel for inside tube

Terminal box design

  • AVR and accessories to be mounted outside the terminal box by the installer
  • 1 terminal box on the left-hand side as seen from the shaft end and cables exiting downwards as standard
  • Separation between the power and auxiliary circuits (space heaters + thermal protection)

“ATEX” certification for explosive atmospheres

LSA 49.1 IC6 alternators are also available in an ATEX version for zone 2 in accordance with Ex II 3G marking in EEx em II T3 protection mode.
The alternators need to be certified by an external body, consult us for this certification.

 

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