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DocuSign Envelope ID:5A7B2937-A688-4E52-BA63-8DF750C7B5A4 <br /> 111111111111111 111111111r.. <br /> Powering(usurers Vlri�ridW* <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 /> f. 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 /> k. Update firmware as necessary with customer approval (parts if required are included at <br /> no charge under service agreements with full parts coverage, otherwise billable) <br /> I. Evaluate Field Service Bulletins (FSBs)for potential updates (parts if required are <br /> included at no charge under service agreements with full parts coverage, otherwise <br /> billable) <br /> 3. External Operating Parameters <br /> a. System Input Voltages (all phases) <br /> b. System Input Currents (all 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 /> Scope of Work Attachment R-2 <br /> Revision 10/14 <br /> Page 1 of 2 <br />