Electrical Studies Basis of Proposals

ELECTRICAL STUDIES – BASIS OF PROPOSALS

PART 1 - GENERAL

0.1 SUMMARY

A. Utilizing a contracted, Registered Professional Engineer, Enertech Electrical will provide for the owner a Short Circuit Study, Protective Device Evaluation Study, Protective Device Coordination Study and Arc Flash Hazard Analysis to determine hazards that exist at all three phase pieces of equipment. (Refer to section 2.1 (C) for more detailed description.

1. The System Analysis (as described above) shall assist the owner in becoming compliant with the applicable electrical standards for worker safety in operating facilities (OSHA 29 CFR 1910 and NFPA 70E, latest edition)

2. The System Analysis must follow IEEE 1584 guidelines through the entire power distribution system. No abridged (short cut) methods of Hazard assessment method shall be used in determining Hazards, ratings or values for the study. All overcurrent devices and cable sizes shall be visually verified by a qualified individual. No overcurrent device or cable size assumptions shall be permitted unless markings are not present or due to inaccessibility. The use of old one-line drawings is prohibited, as this could cause the study accuracy to be compromised and present a hazard by mismarking devices.

3. Included in the cost shall be an on-site, sit down explanation of the report with the appropriate personnel.

4. Upon request of the owner, a minimum of three past Arc Flash Assessments with contact information shall be provided.

5. The Analysis shall be provided using the latest version of SKM Power Tools electrical engineering software or equivalent.

6. Prior to the start of data collection, the engineer shall aid the owner in a system wide naming convention if one is not present.

7. The proposal shall include assistance to the owner in becoming fully compliant with OSHA standards and regulations on Electrical Safety Work Practices. If required, the owner can request, as a separate break out cost, a proposal to provide an Electrical Safe Work Practice Program.

8. Electrical Safe Work Practice Training shall be provided as an alternate cost, at the request of the owner. OSHA 1910.399: “Qualified Person” One who has received training in and has demonstrated skills and knowledge in the operation of electrical equipment and installations and hazards involved. A training course synopsis and sample training certificate shall also be supplied. A list of three companies with contact names and numbers shall be supplied as reference upon request.

a. Training shall be identified for employees deemed as qualified employees and include task training. The second training shall be for the employees deemed as unqualified. Unqualified employees Training per OSHA 1910.332(b)(2): Employees who are covered by paragraph (1) of section 1010.332 (Scope) who are not qualified shall also be trained in and with any electrically related practices which are necessary for their safety.

PART 2 - SCOPE OF WORK

0.1 DATA COLLECTION

A. Enertech Electrical will be responsible for the survey of the owners power distribution system for the purposes of recording and documenting all data required to complete the engineering studies and electrical one-line diagrams.

B. The survey shall record data such as: utility information, equipment nameplate/ratings, cable sizes/lengths, overcurrent device nameplates, settings, etc.

C. A device point is primarily described as the following:

1. A three phase overcurrent protective device a. MCC Bucket: Count each bucket with a load connected as one point. b. Bus Plugs: Count each plug connected with a load connected as one point. 2. Fused and Non Fused Disconnect Switches 3. Panelboards 4. Three Phase Transformers 5. All motors, 40 HP and above. 6. Utility services 7. Engine Generators 8. All Medium and High voltage equipment, relays, reclosures, etc.

D. Enertech Electrical uses qualified journeyman electrician(s) to assist with data collection which may require removal of barriers, openings of front panels, etc., while equipment is energized. Enertech Electrical will supply all PPE that may be required to gather the data.

0.2 SYSTEM ANALYSIS

A. Using the latest version of SKM Power Tools for Windows software or approved equal, Enertech Electrical will perform a comprehensive analysis of the electrical system for all three phase equipment as noted above. The studies shall consider operation during normal conditions, alternate and emergency conditions which could result in a maximum arc flash hazard. All recommended overcurrent device settings shall be made in an effort to meet selective coordination. Enertech Electrical, utilizing their contracted, Registered Professional Engineer, will complete the following studies:

1. Short Circuit Study – A short circuit fault current analysis (three phase bolted fault and single line to ground fault) shall be performed in accordance with ANSI standard C37 and IEEE Standard 141 (Red Book) for each bus location that will be receiving an Arc Flash Label.

2. Protective Device Evaluation Study – The study shall be performed to determine whether circuit breakers or fuses have an adequate kAIC rating for the available fault current they must withstand. Appropriate multiplying factors based on system X/R ratios and protective device rating standards shall be applied. Any problem areas or inadequacies in equipment ratings found shall be listed in table format comparing existing kAIC rating to the available fault current.

3. Coordination Study – A coordination study for devices flagged as mis-coordinated by the SKM software shall be performed in accordance with IEEE 242 (Buff Book) to determine the proper overcurrent device settings that will provide system reliability through selective coordination while minimizing the magnitude of an electrical arc flash hazard incident. Provide time current curves which graphically indicate the coordination of devices. Any devices that are identified as mis-coordinated shall be noted in the study report, and where possible, recommendations shall be made to obtain the required coordination. All settings for relays and circuit breakers or fuse sizes (including manufacturer and type) shall be listed in tabular format or on the TCC plot. Any recommendations given shall include existing and final settings.

4. Arc Flash Study – An arc flash study shall be done for each bus location (calculation point) as identified in the short circuit study. It shall be done in accordance with the applicable standards IEEE 1584-2004a “IEEE Guide for Performing Arc Flash Hazard Calculations” as referenced in NFPA 70E, “Standard for Electrical Safety in the Workplace”, latest revision, in order to quantify the hazard for selection of personal protective equipment (PPE). Tables that assume fault current levels and clearing time for proper PPE selection are not acceptable. Pertinent data, rationale employed and assumptions shall be provided with calculations. Enertech Electrical will assist the owner in selecting appropriate combinations of PPE prior to the final analysis and preparation of equipment labels.

0.3 DESIGN REVIEW

A. Enertech Electrical will provide recommendations ahead of delivering the Study Report that will give the owner a chance to fix problem areas before printing labels. The recommendations shall be broken down into three areas:

1. Arc Flash Analysis: These recommendations shall list all areas where the existing hazards are 8.1 cal/cm2 and higher whether they can be lowered or not, with the goal of mitigating hazards to a lesser incident energy. These recommendations shall include the following: a. Adjustments to existing current limiting devices (e.g. relays, substation breaker electronic trip settings, molded case breaker inst. adjustment.) The recommendation should include existing and new settings. b. Replacement of current limiting devices (ex. Fuse replacement) c. Replacement of obsolete substation breaker (ex. Solenoid style trip units) or molded case breakers.

2. Coordination study: These recommendations shall list area where a mis-coordination exists and shall indicate if the mis-coordination is acceptable, cannot be fixed or if can be fixed then include existing and new settings of protective devices.

3. Protective Device Evaluation Study: These recommendations shall list (can be in table format) all protective devices which have an inadequate AIC Rating. Include as-is rating and as-recommended.

B. Where hazard levels of “Danger!” could not be lowered by the above means, then an attempt shall be made where possible to relocate the hazard away from the bus location to allow worker access to verify equipment is de-energized prior to opening or work begins.

0.4 STUDY REPORT

A. Enertech Electrical will supply a comprehensive report with all engineering materials for review that includes:

1. Report summary with analysis method, findings and recommendations.

2. A summary of all input data for utility source, equipment, protective devices, transformers and cables in spreadsheet format.

3. A summary of Arc Flash Analysis in spreadsheet format which gives at a minimum, the available fault current, incident energy level (calories/cm2), hazard category, at each equipment (bus) location, and its protective device.

4. Overcurrent device coordination curves (TCC) including related section of the electrical one-line diagram for any mis-coordination issues or recommendations.

5. The one-line diagram created from the data collected shall be separated to fit onto E-size drawings and exported to AutoCAD format. These one-lines will be included in the final study report on 11x17 sheets. (All information shall be legible on 11x17 sheets) The following information including the component or bus name shall be shown on the one- line diagram.

a. Data values inputted into the SKM Program which include: 1) Protective Device (Manufacturer, type, size, setting, CT Ratio) 2) Cable (# of conductors/phase, size, length) 3) Transformer (primary and secondary voltage, KVA Rating, % impedance) 4) Motor (Name, Voltage, FLA) b. Equipment bus locations: 1) The available fault current at each bus location which will receive an arc flash label. 2) The incident energy (cal/cm2) at each bus location which will receive an Arc Flash label. 3) The voltage level.

6. Enertech Electrical will supply (1) CD which include all the SKM Power Tools electrical engineering software files of the analysis and in addition supply all information listed (in 1-5 above) in .PDF format.

7. Enertech Electrical will supply a copy of all original data collection sheets with all information required to perform the engineering analysis.

B. LABELS

1. Based on the results of the Arc Flash Study, Enertech Electrical will produce and install warning labels with adhesive backing for each piece of equipment (bus) in accordance with NEC 110.16, NFPA 70E and ANSI Z535.4-2002. The labels must be 4x4 in size and readable in both indoor and outdoor environments for at least 3 years and contain the following information:

a. Arc Flash Hazard Boundary (inches) b. Working Distance (Inches) c. Arc Flash Incident Energy (calories/cm^2) at the working distance of 18 inches d. Voltage rating of the equipment e. Limited Approach Distance (inches) f. Restricted Approach Distance (inches)

g. Equipment Bus Name h. Date prepared i. Contractor’s address and phone number

2. Label Color: Enertech Electrical will have the above information and a color code bar inserted on the label with colors as follows:

a. Orange – Warning (40 calories/cm2) *Note: Arc Flash Labels can be modified per customer’s written electrical safety plan.

PART 3 - FINAL DOCUMENTATION

0.1 FINAL DOCUMENTATION

A. At the label installation, Enertech Electrical will supply (1) copy of the Study Report to the owner.

B. Two sets of E-size drawings of electrical one-lines exported to AutoCAD. These will be used by the owner to track all future changes.

C. Enertech Electrical will deliver in person, and review with the owner, all sections of the study report.

PART 4 - QUALITY ASSURANCE

0.1 QUALITY ASSURANCE

A. Enertech Electrical will provide all necessary material, equipment, labor and technical supervision to perform the arc flash hazard analysis as described herein.

B. Enertech Electrical will utilize engineers or electricians that are experienced and regularly perform electrical power system testing and studies.

C. Personnel performing the arc flash analysis shall be trained and experienced with apparatus and systems being evaluated. These individuals shall be capable of conducting the tasks on the analysis in a safe manner and with complete knowledge of the hazards involved.

PART 5 - SAFETY

0.1 PROCEDURAL REQUIREMENTS

A. Enertech Electrical will provide proof that its employees working on the data collection are qualified and have been properly trained in the use and application of personal protective equipment (PPE) and the hazards of working on or near energized equipment. Enertech Electrical will provide its own PPE protection and is responsible for health and safety of their employees.

B. A certificate of insurance will be provided to the owner.