Department of Public Works South Arroyo Boulevard Street Light Conversion Project October 23, 2019
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. 2
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. 3
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. 4
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. 5
HIGH VOLTAGE SERIES CIRCUITS PHASES MASTER PLAN Department of Public Works 6
HIGH VOLTAGE SERIES CIRCUITS PHASE I Department of Public Works 7
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. 8
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. 9
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 10
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 11
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Department of Public Works - New Radial Shape Light Fixture Test Location 460 South Arroyo Blvd 12
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Department of Public Works - Existing Cobra Head Light Fixture in High Voltage Series Circuit System 880 S Arroyo Blvd 13
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Department of Public Works - Proposed Cobra Head Light Fixture with LED Light in Secondary System 14
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 15
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 ($425,000) 16
SERIES CIRCUIT S-263 (Arroyo Blvd Area) Summary Department of Public Works Light fixtures to be replaced and/or new installed: • 111 Radial Shape LED • 19 Cobra Head LED Light fixtures to be modified: • 3 Pendant Shape LED New secondary power feed required: • 36 Overhead Feed Point by W&P 17
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 6 9 12 69 secondary circuit on existing power pole Install mast arm and radial LED fixture, and connect 2 7 2 1 6 5 4 6 4 35 to secondary circuit on existing power pole Remove existing mast arm and cobra head fixture, 3 2 2 3 7 replace with radial LED fixture and mast arm Remove existing fixture, replace with LED cobra 4 head fixture, and connect to secondary circuit from 3 4 4 5 1 17 existing power pole Install mast arm and LED cobra head fixture, and 5 1 1 2 connect to secondary circuit on existing power pole Modify existing pendant fixture, connect to 6 2 1 3 secondary circuit to existing power pole 7 provide secondary power feed on power pole 6 8 9 6 2 3 1 1 36 18
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. 19
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). 20
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 21
Recommend
More recommend
