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Ensure Top Performance with Preventive Maintenance

You’ve purchased your Uninterruptible Power Supply (UPS) system and everything is running smoothly, but do you have a plan for how to maintain your assets as they begin to age? Just like your car, your UPS requires Preventive Maintenance (PM) to ensure it continues to run at peak performance.

We recommend having your assets checked yearly beginning the first anniversary date following the manufacture date of the equipment and repeating until the equipment is removed from service. Schedules may require adjustment to provide increased levels of service based on the equipment age, service history, environment and operational parameters.    
  
You will want to make sure the people working on your system know it well. Our trained Field Technical Engineers are employed and trained by us to perform maintenance on our UPS systems, Inverters, Battery Chargers, Isolation Transformers, Voltage Regulators and Battery Systems. No one knows your system better than us.

We recommend having your assets checked yearly beginning the first anniversary date following the manufacture date of the equipment and repeating until the equipment is removed from service. Schedules may require adjustment to provide increased levels of service based on the equipment age, service history, environment and operational parameters.   
   
During our Preventive Maintenance we measure and record all critical system parameters including input/output voltages, currents for control circuits, alternate and primary power sources and charger, inverter and static switch outputs. Abnormal conditions will either be repaired during the PM or noted for remedial action and scheduled for repair after review with the client. See the list below for details on what our maintenance includes but is not limited to.

Tested Annually (PM1)

  • Pre and Post inspection interview with plant personnel

  • System cleaning to prevent malfunction and improve heat dissipation to improve reliability

  • Test Aux contract and shunt trip circuit in the DC input breaker by simulating low DC voltage disconnect

  • Sinewave capture of seamless Static Switch transfer from Inverter to Bypass and Bypass to Inverter

  • Sinewave capture of Inverter outputs

  • Infrared scan of all system hardware and PC boards

  • Calibrate all voltage and current reading on UPS with true RMS meter

  • Verify free running frequency of Inverter and ensure it is within +/- 2% of 60HZ to ensure proper sync reference to bypass source feed, if not adjust frequency

  • Simulate full loss of power to the UPS (Black Plant) and make certain UPS does not transfer and maintains the load

  • Test over temperature thermal couples to make certain Inverter shuts down, seamlessly transfer to bypass and opens DC input breaker

  • Check 480 input voltage for balanced currents into charger bridge

  • Verify all AC caps are functioning by taking voltage reading across cap bank

  • Test ripple current on battery to insure less than 5% amp hour rating of battery

  • Scheduled parts replacement to assure optimum performance

  • Annual battery inspection and continuity test

  • Any other functional test deemed necessary by the service engineer to verify proper operation

  • Battery Chargers - Float/Equalize functions, load share function and alarm functions.

  • Inverter/Static Switches - Static Switch automatic transfer function, alarm function, manual bypass transfer function. Verify the proper transfer of the static switch to bypass (no interruption) via the control push buttons and as a simulated Inverter Failure, capture transfer on Oscilloscope to review.

Tested Every Five Years (PM5)

  • Includes everything in PM1

  • Scheduled Parts Replacement - To assure the optimum performance and reliability of the UPS system, we recommend replacement of critical components, including pilot lights fuses, fans, alarms and relays.

Tested Every 10 Years (PM10)

  • Includes everything in PM1

  • Scheduled Parts Replacement - To assure the optimum performance and reliability of the UPS system, we recommend replacement of critical components, including pilot lights fuses, fans, alarms and relays

Additional optional services are available and can be added to preventive maintenance checks:

  • Battery Service Test (Cap Test)

  • System AC Load Testing (ACL)

  • Transformer Replacement (CVT)

  • Printed Circuit Board Replacement (PCBR) – Recommended during PM10

Keeping up with your Preventive Maintenance will provide peace of mind that your assets will be ready to pick up your load during any type of outage. Contact us to schedule a PM for your assets.

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