Orange County NC Website
Browse       Search
Fm,T*N <br /> Powering Business Worldwide <br /> Electronics (UPS Power Module, DC, PDU, Flywheel) Preventive <br /> Maintenance <br /> Scope of Work <br /> Attachment R-2 <br /> This scope of work is shared by the following power quality equipment types: Eaton UPS, Eaton <br /> PDU/PDR/RPP/STS, Eaton DC,Vycon Flywheel and Non Eaton equipment(MVS). Note the <br /> applicable features vary by type of equipment being contracted and additional scopes of work may be <br /> required. <br /> The following is an outline of general checks performed during an Eaton®Preventive Maintenance of the <br /> Eaton UPS Power Module normally performed by Eaton field service personnel. All checks are designed <br /> to be performed during off line operation, in the bypass mode. All checks or processes may not be <br /> applicable to all equipment types or models. <br /> 1. Visual Inspection <br /> a. Inspect all printed circuit board connections for cleanliness, swab contacts if necessary. <br /> b. Inspect all power connections for signs of overheating <br /> c. Inspect all subassemblies, bridges and legs for signs of component defects or stress <br /> d. Inspect all DC capacitors for signs of leakage <br /> e. Inspect all AC capacitors for signs of leakage <br /> If. Inspect and inventory all customer-owned spare parts <br /> g. Inspect for,and perform as required,any open engineering changes <br /> h. If work is completed under a PowerTrustTM Ultra contract, inspect battery monitoring <br /> system <br /> 2. Internal Operating Parameters <br /> a. DC Ground Detection Offset(if applicable) <br /> b. Inverter leg current average balance(if applicable) <br /> c. Output filter current average phase balance <br /> d. Rectifier bridge current average leg balance <br /> e. AC Protection settings are checked <br /> f. DC Protection settings are checked <br /> g. Input and Output Frequency and Voltage Bandwidth settings are checked <br /> h. Verify DC filter capacitance <br /> I. Verify AC tank and trap filter capacitance <br /> j. Power Supply voltages and waveforms <br /> 3. External Operating Parameters <br /> a. System Input Voltages(all phases) <br /> b. System Input Currents(ail phases) <br /> c. DC Charging Voltages(float and equalize),record settings,adjust to nominal <br /> d. Rectifier phase on and walk up <br /> e. Inverter phase on and walk up <br /> If. Adjust all panel meters to measured values <br /> g. System Bypass Voltages(all phases) <br /> h. Manual and UV Transfer Testing,verify uninterrupted transfer waveform (if applicable) <br /> I. Outage simulation, and battery capability testing,and verify charger current limit <br /> j. Generator operation and interface verification(if applicable) <br /> Scope of Work Attachment R-2 <br /> Revision 4/10 <br /> Page 1 of 2 <br />