Conversion Project October 23, 2019 Typical HV Series Circuits - - PowerPoint PPT Presentation

Department of Public Works

South Arroyo Boulevard Street Light Conversion Project

October 23, 2019

Department of Public Works

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.

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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.

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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.

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Reliability Factor

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 Availability of Obsolete Equipment – Difficulty Servicing the System

• Transformers are difficult to procure due to
• bsolescence 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.

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HIGH VOLTAGE SERIES CIRCUITS PHASES MASTER PLAN

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HIGH VOLTAGE SERIES CIRCUITS PHASE I

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Department of Public Works

HIGH VOLTAGE SERIES CIRCUITS PHASE I

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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
• thers.
• S-263 Arroyo Blvd from South City Limits to

Westminster Dr. and others.

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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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SERIES CIRCUIT S-263 (Arroyo Blvd Area)

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• Existing Radial Shape Light

Fixture in High Voltage Series Circuit System Arroyo Blvd / Westminster Dr

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SERIES CIRCUIT S-263 (Arroyo Blvd Area)

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• Proposed Radial Shape Light

Fixture & Mast Arm in Secondary System Arroyo Blvd / Westminster Dr

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SERIES CIRCUIT S-263 (Arroyo Blvd Area)

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• New Radial Shape

Light Fixture Test Location 460 South Arroyo Blvd

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SERIES CIRCUIT S-263 (Arroyo Blvd Area)

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• Existing Cobra Head Light

Fixture in High Voltage Series Circuit System 880 S Arroyo Blvd

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SERIES CIRCUIT S-263 (Arroyo Blvd Area)

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• Proposed Cobra Head Light

Fixture with LED Light in Secondary System

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SERIES CIRCUIT S-263 (Arroyo Blvd Area)

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• Modify Existing Pendent Light

Fixture in High Voltage Series Circuit System to LED Light in Secondary System. S Arroyo Blvd / La Loma Rd

Department of Public Works

SERIES CIRCUIT S-263 (Arroyo Blvd Area)

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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 ($425,000)

Department of Public Works

SERIES CIRCUIT S-263 (Arroyo Blvd Area) Summary

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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

Department of Public Works

SERIES CIRCUIT S-263 (Arroyo Blvd Area) Summary

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Description Sheet 4 Sheet 5 Sheet 6 Sheet 7 Sheet 8 Sheet 9 Sheet 10 Sheet 11 Total 1 Remove 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 6 9 12 69 2 Install mast arm and radial LED fixture, and connect to secondary circuit on existing power pole 7 2 1 6 5 4 6 4 35 3 Remove existing mast arm and cobra head fixture, replace with radial LED fixture and mast arm 2 2 3 7 4 Remove existing fixture, replace with LED cobra head fixture, and connect to secondary circuit from existing power pole 3 4 4 5 1 17 5 Install mast arm and LED cobra head fixture, and connect to secondary circuit on existing power pole 1 1 2 6 Modify existing pendant fixture, connect to secondary circuit to existing power pole 2 1 3 7 provide secondary power feed on power pole 6 8 9 6 2 3 1 1 36

Department of Public Works

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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Department of Public Works

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 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