Department of Public Works South Arroyo Boulevard Street Light Conversion Project February 4, 2020
HIGH VOLTAGE SERIES CIRCUITS PHASE I Department of Public Works 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. 2
Typical HV Series Circuits Diagram Department of Public Works • 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. 3
Low Voltage Multiple Circuits Diagram Department of Public Works • 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. 4
Safety Factor Department of Public Works 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. 5
Reliability Factor Department of Public Works 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. 6
HIGH VOLTAGE SERIES CIRCUITS PHASES MASTER PLAN Department of Public Works 7
HIGH VOLTAGE SERIES CIRCUITS PHASE I Department of Public Works 8
HIGH VOLTAGE SERIES CIRCUITS PHASE I Department of Public Works 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. 9
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Department of Public Works 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. 10
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Department of Public Works - Existing Radial Shape Light Fixture in High Voltage Series Circuit System Arroyo Blvd / Westminster Dr 11
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Department of Public Works - Old Aluminum Radial Shape - Existing Original Metal Radial Light Fixture Replacement Shape Light Fixture (20%) 12
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Department of Public Works - Proposed Radial Shape Light Fixture & Mast Arm in Secondary System Arroyo Blvd / Westminster Dr 13
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Department of Public Works - Another New Radial Shape Light Fixture Test Location. 460 South Arroyo Blvd 14
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Department of Public Works - New Radial Shape Light Fixture 15
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Department of Public Works - Existing Cobra Head Light Fixture in High Voltage Series Circuit System - Replaced with New Cobra Head or Radial Shape Fixture 880 S Arroyo Blvd 16
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Department of Public Works - Proposed Cobra Head Fixture with LED Light Connecting to Secondary System 1265 Grand Ave 17
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Department of Public Works - Modify Existing Pendent Light Fixture in High Voltage Series Circuit System to LED Light in Secondary System. S Arroyo Blvd / La Loma Rd 18
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Department of Public Works 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) 19
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Summary Department of Public Works 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 20
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Summary Department of Public Works Description Sheet 4 Sheet 5 Sheet 6 Sheet 7 Sheet 8 Sheet 9 Sheet 10 Sheet 11 Total Remove luminaire from existing circuit, replace with 1 radial LED fixture and mast arm, and connect to 13 9 11 4 5 7 9 12 70 secondary circuit on existing power pole Remove existing mast arm and cobra head fixture, 2 2 2 3 7 replace with radial LED fixture and mast arm Remove existing cobra head fixture, replace with 3 LED cobra head fixture, and connect to secondary 4 5 9 circuit from existing power pole Modify existing pendant fixture, connect to 4 2 1 3 secondary circuit to existing power pole 5 provide secondary power feed on power pole 6 8 9 6 2 3 1 35 21
SERIES CIRCUIT S-263 (Arroyo Blvd Area) ADDITIONAL LIGHTING PETITION Department of Public Works 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.) 22
SERIES CIRCUIT S-263 (Arroyo Blvd Area) ADDITIONAL LIGHTING PETITION Department of Public Works Want a new light on power pole #19907MP ? - Signatures are required from #156, 157, 160 and 165 California Terrace. 23
SERIES CIRCUIT S-263 (Arroyo Blvd Area) ADDITIONAL LIGHTING PETITION Department of Public Works Field check: - Power pole number; - Availability of secondary power - Number of affective residents - Light type and wattage 24
SERIES CIRCUIT S-263 (Arroyo Blvd Area) ADDITIONAL LIGHTING PETITION Department of Public Works PETITION FORM AND LETTER: 25
SERIES CIRCUIT S-263 (Arroyo Blvd Area) ADDITIONAL LIGHTING PETITION Department of Public Works PETITION FORM AND LETTER SAMPLE: 26
SERIES CIRCUIT S-263 (Arroyo Blvd Area) PROJECT SCHEDULE Department of Public Works • 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. 27
Color Temperature…What is it? Department of Public Works All lighting sources emit a range of wavelengths, which, when combined, produce the color of light perceived by the human eye. 28
Color Temperature Department of Public Works 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). 29
Questions Department of Public Works Richard Yee, PE, PTOE Principal Engineer Department of Public Works (626) 744-4643 ryee@cityofpasadena.net Elvin Jiang, PE Project Engineer Department of Public Works (626) 744-7103 ejiang@cityofpasadena.net 100 North Garfield Ave Room N306, Pasadena, CA 91101 30
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