PWS ESL20-006 Switchboard Cleaning.doc

USS Land

( AS 39 )

1.0 ABSTRACT

1.1 This item provides for the cleaning and maintenance of the Main, Ships Service and Emergency Switchboards.

2.0 REFERENCE/ENCLOSURE

2.1 Reference:

2.1.1 NAVSEA Technical Manual, 0910-LP-005-7200, Main Switchboard.

2.1.2 MSFSC Standard Item No. 020, Revised 22 March 2010 "Switchboard and Electrical Control Cabinet Survey, Cleaning and Repairs."

2.2 Enclosure:

2.2.1 ANSI-National Electrical Testing Association 2011, Table 100.12.1 thru 4

3.0 ITEM LOCATION/DESCRIPTION/QUANTITY

3.1 Location:

3.1.1 Main Switchboard (5-110-0-E)

3.1.2 SS Switchboard (5-110-0-E)

3.1.3 Emergency Switchboard (1-51-0-E)

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICE: None

5.0 NOTES:

5.1 The contractor shall submit SECNAV 5512 to PPE along with color copy of Passport three weeks prior to start of POP. Contractor will report to VCC Guam for base access pass upon received of the control number from PPE.

5.2 Do not apply insulation test voltage to electronic devices or equipment with solid state components.

5.3 Do not defeat any safety interlocks.

5.4 Always remove the breakers/contactor from the enclosure before performing any maintenance. Failure to do so could result in electrical shock leading to death, sever personal injury or property damage.

5.5 This work item is not applicable to High Voltage switchboards.

6.0 NOT USED

7.0 STATEMENT OF WORK REQUIRED

7.1 Provide all labor, materials, tools and equipment as required to clean and inspect renew the switchboards using references 2.1.1 and 2.1.2 for guidance.

7.2 Coordinate all work contained in this item with the Chief Engineer and Chief Electrician. Switchboard work shall only be done after hours between 1800 and 0400 to reduce interference and impact with the day shift work.

7.3 Before starting work, all equipment shall be locked out and tagged out using the ship’s lock out procedures. Switchboards shall be proven dead prior to beginning any work. Wear all required personal protective equipment (PPEs) when working on switchboard. Both Switchboard busses are to be de-energized, isolated, and proven dead for this work. Keeping half the switchboard energized is not authorized. Install barricades and signs to prevent entry of personnel into the work area that is not associated with the cleaning and inspection.

7.4 The Contractor is to utilize a tool check-in/check-out log during switchboard work to account for all items used in the cleaning, torqueing, repair & inspections. The Shipyard Rep is to positively confirm to the MSCREP & Chief Engineer, prior to re-energizing the switchboards, that they are safe and ready to energize at the end of each nights work.

7.5 Provide all temporary services such as lighting and ventilation fed from shore power during the switchboard work and inspections.

7.6 Install filter media onto the switchboard openings to prevent dust and debris from entering switchboard internals. Remove filters prior to dock trials.

7.7 Temporarily remove all front and rear access covers to allow for full inspection.

At a minimum the inspection shall include;

a) enclosures for moisture, damage, missing or incorrect hardware, etc…

b) fuse holders for corrosion or breaks and tighten all hardware

c) for blown fuses

d) ground detection system ensuring lights are illuminated to half brilliance

e) switch handles for damage, misalignment, etc…

f) cables for worn, frayed or chafing insulation

g) cable and wiring for corrosion, loose connections, terminals, lugs, fittings and any discoloration due to overheating

h) switches, relays & components for dirty contacts, cracked or broken insulation and loose hardware

i) meters for damage

j) molded case circuit breakers for dirt, damage and discoloration due to overheating

k) bus bars for loose connections and discoloration due to overheating Submit a condition report of all findings and recommended repairs to the MSCREP.

7.8 Thoroughly clean all dust, dirt, carbon, film, etc…. from all electrical/electronic components from the switchboards including breaker enclosures using vacuum, soft bristle brush and clean lint free rags. Clean the open deck area below the switchboards and examine all varnish-insulated surfaces, cable penetrations and fire stop.

NOTE: An IEEE approved fast evaporating solvent and a clean, dry, lint-free rag may be utilized to clean any hardened carbon, oil, or grit deposits. Solvents utilized shall not contain Acetone or Acetone compounds.

7.9 Using the torque tables in the equipment tech manuals as guidance, tighten all switchboard fasteners, bus bar fasteners, lug connections, terminal screws, relays, trips and all contact points. In the absence of manufacturer’s published data, use Enclosure 2.2.1.

7.10 Lubricate all operating mechanisms with a grade of lubricant as recommended by IEEE for electrical switching mechanisms.

7.11 Post Switchboard cleaning, prior to closing all panels conduct a visual inspection of each Switchboard in the presence of the MSCREP, Chief Engineer and Chief Electrician. Check each for cleanliness ensuring they are free of dirt, dust, debris and other foreign matter.

7.12 Upon completion of all work, replace equipment covers and close the Switchboards leaving them in a ready for service condition.

7.13 In conjunction with the Dock Trial:

7.13.1 With assistance of ships force perform an operational test of all the switchboard functions. Testing shall include the following:

a) Opening & closing of Generator & Shore Power breakers

b) Manual and automatic startup of generators, paralleling and bus transfer functions.

c) Reverse power, reverse current and under voltage function for each generator.

7.14 Manufacturer’s Representative: None

7.15 Preparation of Drawings: None.

8.0 GENERAL REQUIREMENTS:

8.1 Period of Performance: 20-30 MAY 2020

8.2 Location: Polaris Point, Guam

Enclosure 2.2.1

Enclosure 2.2.1

RISK

Frequency of Occurrence Over Time

A

Likely B

Probable C

May D

Unlikely

Risk Assessment Codes

1 – Critical 2 – Serious 3 – Moderate 4 – Minor 5 - Negligible

RAC SCORE:

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