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3.2.9Control Logic:  The entire inverter operation shall be performed by microprocessor controlled logic. All operations, parameters, diagnostics, test and protection routines are firmware controlled. The firmware also compensates for component drift and changes in operating environment to ensure stable and consistent performance. A self-test and diagnostics subroutine shall assist in troubleshooting the unit. The Control PCB shall be located on the front door to isolate it from power wiring and switching devices. This arrangement shall minimize EMI and allow hot board swaps, in the manual bypass mode.

2.3.10Manual Maintenance Bypass Switch:  An auto-manual MBS (Maintenance Bypass Switch) shall be provided in the Inverter cabinet for connecting power to the critical load through the external maintenance bypass line. It shall be used when the unit needs to be de-energized for maintenance, without disrupting power to the load. Operating the switch must be strictly restricted to authorized personnel who have cabinet access via the key. The MBS shall be operated in conjunction with the S-1 synchronization switch, ensuring full synchronization without inrush current during transfer.

2.3.11Output Transformer:  An isolation output transformer shall be utilized to provide specified output voltage and separate the inverter rectifier/inverter section from the load disturbances and conducted noise.  

2.3.12Manual Inverter Test Switch:  The unit shall have a momentary test switch to allow the user a manual system test without the need to operate any breakers or shutting down the system. The test switch shall be in compliance with UL924 rules, well marked, accessible only after opening a locked front cabinet door and further protected from accidental activation. The Power Wave 3 shall resume normal operation after the test switch is release.

2.3.13Battery Subsystem: Sealed, maintenance free VRLA (Valve-Regulated Lead–Acid battery) batteries shall be provided. The batteries shall have an expected life of 10 years. The batteries shall be contained in a separate battery cabinet with a dedicated circuit breaker for battery protection, convenient power cut-off, and servicing.

Battery run time (based on 100% full load) shall be no less than the specified time.

Runtime shall comply with UL924 providing a minimum of 90 minutes at full load.

Specified extended runtimes shall be provided only as an option.


2.4.1Front Panel LCD Display  –  Standard:  The backlit LCD shall have a four line by 20 character display for instant indication of the unit’s status, metering, alarms and battery condition. The display provides easy read-out on two standard and two optional screens, providing continuous information with scrolling updates.

2.4.2Status display Status

Standby:  System is performing self-diagnostic

Start up:  Inverter is being started

Normal:  All parameter are acceptable

Problem:  Loss of utility power over load

Failure:  System requires service Rating in KVA Buss Voltage Status

6005-033 Rev. B                                                        Page 5 of 12

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