MODEL A-51 D.C. TO A.C. INVERTER SINE WAVE OUTPUT La Marche inverters use highly reliable, solid state, SCR circuitry    with    a    ferroresonant    transformer    that    has inherent    regulation.        Output    filtering,    and    overload protection (current limiting ) The inverter is self-protected for AC-DC shorts, reverse polarity, and over or under dc VOLTAGE  Battery  protection  is  provided  by  low  voltage shutdown and DC input fusing. TWO TYPES OF OPERATION CONTINUOUS INVERTER-During normal operation, the A-51 inverter draws power from the charger and supplies regulated since wave AC power to the load.  If AC power to the  load.    When  power  is  restored.  The  change  back to normal operation is automatic, including recharging of batteries. STANDBY INVERTER-During normal operation, the load is  supplied  power  directly  from  the  commercial  AC  line, wired  through  a  transfer  relay  or  static  switch  (optional accessory) in the inverter.  in the event of AC line failure, the load is disconnected from the line, the inverter begins drawing power from the batteries and supplies Ac power to   the   load.      Reversed   and   batteries   are   restored. (Manual retransfer optional.) FEATURINGOPTINAL ACCESSORIES • Reliable-simple, few components, field proven, SCR ferro resonant design. • State of Art Static Switch. • Inverter Star/Off Switch • Current limited and protected for AC- DC short, over/under voltages, and reverse polarity. • Class H Insulation. • Convection Cooled, Front Access Enclosure. • Available for 24 VDC 48 VDC, AND 120 VDC battery supplies. • 50 or 60 Hertz Operation. • Wide range of models and options. • Transfer Relay 100 to 1000 2 to 10 KVA 40 12-5 to 20 KKVA 50 msec. • Transfer from and retransfer to inverter Failure-DC Light Load on Line-AC Light • Manual Maintenance bypass Switch. • Concidental line synchronization. • ¼  cycle Static Switch require coincidental line sync) with coincidental line sync) with Manual or Delayed Automatic transfer Switch, Test Switch Fused Inverter and utility Branch Life  LED’s for: Utility Available Inverter Available Load Powered by Prime Source Load Powered by Alternate Source Sources Phase Locked The following adjustments are provide: Inverter Overvoltage Limit +10 Inverter Undervoltage Limit -10 Utility Overvoltage Limit    +10 Utility Undervoltage Limit -10 Load Overvoltage Limit    +15 Load Undervoltage Limit  -15 Delayed Retransfer sec    1-10 Phase Lock (degrees)   1-10 Prime source Selection Inverter or Utility • Alarm Contacts Utility Power Failure Inverter Failure Contacts for all status conditions (5) form C • Meters +2 DC ammeter DC voltmeter AC ammeter AC voltmeter Frequency meter • Low DC voltage alarm • High DC voltage alarm • AC and DC circuit breakers • Special Paint • Others: (see General Catalog)