south arroyo boulevard street light conversion project€¦ · shape light fixture. department of...

Department of Public Works

South Arroyo Boulevard Street Light

Conversion Project

February 4, 2020


HIGH VOLTAGE SERIES CIRCUITS PHASE I

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Why are we here again?

• Replacement fixture color.

• Proposed new light locations from original plans.

• Petition for additional lights.

• Construction schedule including Public Works and Water & Power Departments.


Typical HV Series Circuits Diagram

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• Open loop series circuit requires 6.6 amps and

variable high voltage dependent on the number of

lights on system.

• Since the lights are daisy-chained together, if one

lamp fails, the whole circuit would go dark.


Low Voltage Multiple Circuits Diagram

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• 110/220 volt system that utilizes multiple circuits in parallel with

separate lighting controls.

• Smaller circuits equals easier troubleshooting and less affected

lights when circuit is under repair.


Safety Factor

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Public Safety

Due to their aged infrastructure, HV series systems

experience intermittent service outages affecting entire

neighborhoods.

Worker Safety

Lower voltage (120/240 volts) systems are safer to

work on than high voltage (1,000 plus volts) systems.

Frequent grounding problems and lead shielded

conductors are prone to electrical shorts that can yield

greater risk of electrocution. Use of thermoplastic

insulated conductors instead of lead shielded

conductors reduces the risk.


Reliability Factor

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Availability of Obsolete Equipment – Difficulty Servicing the System

Transformers are difficult to procure due to

obsolescence and typically cost 10 times

more than (low volt) counterparts.

Heavy duty incandescent bulbs are no

longer produced and City has limited

supply of replacement stock.


HIGH VOLTAGE SERIES CIRCUITS

PHASES MASTER PLAN

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Phase I consists of:• S-048 San Rafael Ave from La Loma Rd to Colorado

Blvd and others.

• S-155 Marianna Rd from Cul-de-sac to Ave 64 and others.

• S-263 Arroyo Blvd from South City Limits to Westminster Dr. and others.


SERIES CIRCUIT S-263 (Arroyo Blvd Area)

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Existing South Arroyo Boulevard system consists of various light fixtures:• Radial shape light fixture with incandescent lamp on

wooden luminaire arm.

• Old cobra head light fixture with high pressure sodium lamp.

• Pendant light fixture with incandescent lamp.



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- Existing Radial Shape Light

Fixture in High Voltage Series

Circuit System

Arroyo Blvd / Westminster Dr



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- Old Aluminum Radial Shape

Light Fixture Replacement

(20%)

- Existing Original Metal Radial

Shape Light Fixture



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- Proposed Radial Shape Light

Fixture & Mast Arm in Secondary

System

Arroyo Blvd / Westminster Dr



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- Another New Radial

Shape Light Fixture

Test Location.

460 South Arroyo Blvd



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- New Radial Shape Light Fixture



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- Existing Cobra Head Light


Circuit System

- Replaced with New Cobra

Head or Radial Shape Fixture

880 S Arroyo Blvd



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- Proposed Cobra Head Fixture

with LED Light Connecting to

Secondary System

1265 Grand Ave



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- Modify Existing Pendent Light


Circuit System to LED Light

in Secondary System.

S Arroyo Blvd / La Loma Rd



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Scope of Work & Engineering Estimate:

• Remove existing luminaire and arm from existing series circuit.

• Install new radial LED fixture and mast arm.

• Connect all new replacement fixture to secondary circuit on existing power pole.

• Provide all secondary overhead circuit by W&P.

• Remove existing series circuit transformer by W&P.

• Construction Cost ($450,000)



Summary

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Light fixtures to be replaced and/or new installed:• 77 Radial Shape LED

• 9 Cobra Head LED

Light fixtures to be modified: • 3 Pendant Shape LED

New light fixtures to be installed :• To be Determined by Petitions

New secondary power feed required:• 35 Overhead Feed Point by W&P



Summary

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Description Sheet 4 Sheet 5 Sheet 6 Sheet 7 Sheet 8 Sheet 9 Sheet 10 Sheet 11 Total

1Remove luminaire from existing circuit, replace with radial LED fixture and mast arm, and connect to secondary circuit on existing power pole

13 9 11 4 5 7 9 12 70

2Remove existing mast arm and cobra head fixture, replace with radial LED fixture and mast arm

2 2 3 7

3Remove existing cobra head fixture, replace with LED cobra head fixture, and connect to secondary circuit from existing power pole

4 5 9

4Modify existing pendant fixture, connect to secondary circuit to existing power pole

2 1 3

5 provide secondary power feed on power pole 6 8 9 6 2 3 1 35



ADDITIONAL LIGHTING PETITION

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REQUEST FOR ADDITIONAL LIGHTING:

• Secondary power feed on utility pole will be ready per design, new luminaire and arm can be added to the existing utility pole(s).

• Resident may request the additional lighting near their residence.

• Request will be evaluated, petition form will be provided by staff.

• Petition form shall be signed by the neighbors who may be affected.

• Additional light may be installed as part of the project (normally work order will be sent to Operations.)




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Want a new light on power pole #19907MP ?

- Signatures are required from #156, 157, 160 and 165 California Terrace.




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Field check:

- Power pole number;

- Availability of secondary power

- Number of affective residents

- Light type and wattage




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PETITION FORM AND LETTER:




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PETITION FORM AND LETTER SAMPLE:



PROJECT SCHEDULE

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• End of February 2020 – Additional lighting petition forms need to be submitted.

• March 2020 – Finalize design of lighting sytem.

• March to September 2020 – Material procurement including arms and fixtures.

• May 2020 – PWP begins utility pole replacements and installation of secondary power.

• September 2020 - Public Work begins replacement of luminaire arms and fixtures, and installing new luminaires per petition.

• Post project – PWP starts to remove existing high voltage (primary overhead) circuit.


Color Temperature…What is it?

All lighting sources emit a range of wavelengths, which, when combined, produce the color of light perceived by the human eye.

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Color Temperature

Corrected Color Temperature (CCT) is a shorthand way to describe the light’s color, in terms of its apparent “warmth” or “coolness”. CCT is measured in kelvin (K).

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Questions

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Richard Yee, PE, PTOE

Principal Engineer


(626) 744-4643

[email protected]

Elvin Jiang, PE

Project Engineer


(626) 744-7103

[email protected]

100 North Garfield Ave Room N306, Pasadena, CA 91101

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