AERS Automatic Energy Reduction System HID lamp control systems for maximum energy savings Holophane has been a leader in energy efficient luminaires and systems for over 100 years. In the late 1960 s, Holophane developed a Hi-Lo system for mercury vapor fixtures. We have now developed a new Hi-Lo system designed to take even greater advantage of today s energy efficient MH and HPS lamps and high efficiency borosilicate glass reflectors and refractors. HL-1161 4/03
AERS Operates either metal halide or high pressure sodium lamps HPS: Full input, 100%, and either 35% or 50% input wattage MH: Full input, 100%, and 50% input wattage C/UL/US listed for damp location Normal level System overview With a lighting system operating at normal output, all production activities can be conducted safely and efficiently. When an activity is reduced or terminated, selected areas may be automatically switched to a preselected lower output to save energy. Lighting distribution remains the same but the system is operating in the energy conservation mode by reducing input watts to the fixture. When AERS senses activity in an area, the lighting system smoothly returns to normal output. This system is a combination of luminaires and sensors connected to a control module. Each control module circuit operates a sensor/luminaire combination. Occupancy sensors/contact closures An occupancy sensor or other contact closure (photosensor, pressure pad, etc.) detects when someone is present in a zone and HOLOPHANE 2
SCHOOLS DISTRIBUTION CENTERS WAREHOUSES PARKING GARAGES ASSEMBLY AREAS LOADING DOCKS BULK MAIL FACILITIES POST OFFICES STORAGE AREAS CARGO HANDLING AREAS CONTAINER YARDS MALLS RETAIL AREAS Low level signals the luminaires in that zone to switch from low mode to normal mode. When the sensors no longer sense motion in a zone, the sensor signal stops and the luminaires switch back to low mode after a preset time delay. A control module can operate up to six zones with a maximum of twenty luminaires (600 ma load) per zone (DC-low voltage). AERS luminaire The standard Holophane luminaire is designed with a modified ballast and relay to operate with AERS. The modified ballast is designed to operate the lamp at two input wattages: HPS, normal input like a standard luminaire, and a reduced input, either 35% or 50% of full input. Metal halide, normal input and a reduced input of 50%. The relay is wired to an occupancy sensor (or some type of contact closure) through a control module allowing the luminaire to switch between the two input wattages. The relay signals the ballast which input wattage to supply the lamp at any time. AERS 3 HOLOPHANE
AERS The control module has three primary functions: 1 When the luminaires are first turned on, the control module overrides the sensors and leaves the luminaires on normal mode for 15 minutes,* until the lamps are operating at steady state. After the 15 minute warm-up, the control module allows the sensors to control the luminaire switching. 2 The control module links the luminaires and the sensors in a zone. In a flex wiring system, the control module links the hard-wiring system to the flex system. 3 The control module allows override switching of individual zones or the entire system through low power, low voltage contact closures, such as a manual switch (DC-low voltage). *Lamp manufacturers suggest a stabilization time at normal lamp output. AERS AC Power control wiring Holoflex Power Distribution with AERS Control AERS AC Holoflex Control Module Conduit Distribution Panel Three circuit power distribution Distribution Box Cable Extender Cable Lighting Fixture Drop Sensor Locations Low voltage control The AERS system can be installed separately from the main power distribution using low voltage DC control wiring. Each control module is designed to handle up to six zones. This system is ideal for adding AERS control to installations with existing power distribution. High voltage control AERS is also available using high voltage control wiring. Line power and control wiring can run together through the same conduit. (Not available in Canada) High voltage/holoflex control Holophane has incorporated AERS into its Holoflex flexible wiring system. Line power and control wiring are fed through a single cable. The AERS control module is designed to handle up to three zones. This system is ideal for installing AERS into new installations. (Not available in Canada) Distribution Box Cable Home Run Cable Lighting Panel Control Module HOLOPHANE 4
Energy Savings Wattage consumption by lamp type Average input wattage over life Lamp source Nominal Input wattage 1 Average input wattage over life 2 Full 50% Low 35% Low Full 50% Low 35% Low 250 watt HPS286 138 101 294 171 127 400 watt HPS441 225 159 445 274 199 250 watt MH 280 139 NA NA 400 watt MH 438 221 NA NA 120 100 400 watt HPS, 120 volt Relative Lumen Output (%) 80 60 40 20 0 0 1 2 3 4 5 Transition Time (min.) S 100% > 35% 100% > 400 watt MH, 120 volt Relative Lumen Output (%) 120 100 80 60 40 20 1 120V line, 100V lamp, HPS only 2 120V line, 90-150V lamp volts, HPS only Transition time vs. relative lumen output 0 0 1 2 3 Transition Time (min.) 50% > 100% 100% > 50% 400 watt HPS, 120 volt Relative Lumen Output (%) 120 100 80 60 40 20 0 0 1 2 3 4 5 Transition Time (min.) 50% > 100% 100% > 50% 250 watt MH, 120 volt Relative Lumen Output (%) 120 100 80 60 40 20 0 0 1 2 3 Transition Time (min.) 50% > 100% 100% > 50% Wattage consumption For HPS, average input wattage over life provides information to determine energy savings. As indicated by the table, HPS input wattage increases over life. Therefore, the average input over life is higher than the initial or nominal input, resulting in more accurate savings. Ideally, a group relamping program would maximize energy savings. In normal operation, a 400 watt HPS lamp is consuming 445 watts on average to provide normal lamp output. At the 35% level it will consume an average of 199 watts. This can be a significant savings where large facilities with frequent low occupancy or activity levels are concerned. For metal halide, the nominal input wattage may be used to calculate energy savings over life. Transition time The tables show actual illumination response time to switched operation. Example: For 400W HPS transition response to 35% low. Energy reduction is instantaneous. Lamp output drops initially to 55% and continues downward as lamp cools to approximately 22% output. Reversing the procedure, input wattage returns to normal and illumination immediately increases to 44% output and continues upward as lamp warms. Normal operation is resumed in approximately 3 minutes (250 watt operation is similar). Metal halide s response is similar, however, the return to normal output is almost instantaneous. The lamps are virtually at full output in 40 seconds. AERS 5 HOLOPHANE
AERS Let s look at a simple example. A manager of a small distribution center is trying to decided between a standard HID lighting system and an HID system with AERS. How much energy can be saved with AERS? (see chart on right) Annual operating cost per luminaire 400 watt High Pressure Sodium Annual Operating Cost Per Luminaire 500 400 250 watt High Pressure Sodium Annual Operating Cost Per Luminaire 300 250 Characteristics: Hours of operation: 16 hrs/day, 365 days/year Cost per KWH: $0.09 Number of luminaires: 100 Type of luminaire: 400 watt HPS Level of AERS control: 35% low level Occupancy rate: 25% Example: 1. 400W HPS 0.246 kw 2. Hrs/day 16 Days/year 365 Low level time x 0.75 4,380 4,380 hrs 3. Cost/kwh.09 4. Number of luminaires x 100 Annual saving $9,697.32 Calculation worksheet Estimate your own energy savings with AERS: 1. Select the wattage savings with AERS based on normal vs low level input wattage: High pressure sodium: 250 watt with a 35% low level = 0.167 kw 250 watt with a 50% low level = 0.123 kw 400 watt with a 35% low level = 0.246 kw 400 watt with a 50% low level = 0.171 kw Metal halide: 250 watt with a 50% low level = 0.141 kw 400 watt with a 50% low level = 0.217 kw 1. 300 200 100 0.04.05.06.07.08.09.10.11.12.13.14.15 Cost per KWH ($) 200 150 100 50 0.04.05.06.07.08.09.10.11.12.13.14.15 Cost per KWH ($) AERS - 35% Low Level AERS - 50% Low Level Standard Luminaire 400 watt Metal Halide 250 watt Metal Halide Annual Operating Cost Per Luminaire Annual Operating Cost Per Luminaire 500 250 400 200 300 150 200 100 100 50 0 0.04.05.06.07.08.09.10.11.12.13.14.15.04.05.06.07.08.09.10.11.12.13.14.15 Cost per KWH ($) Cost per KWH ($) AERS - 50% Low Level Standard Luminaire 2. Calculate the hours of low level operation: Hours of operation per day Days of operation per year Time on low energy level (%) x 2. 3. Cost per KWH 3. 4. Number of luminaires x 4. Annual savings with AERS $ Calculation Worksheet HOLOPHANE 6
Ordering Data How to construct a catalog number for AERS EXAMPLE: SEN IR LV WH 1 2 3 4 Catalog no. Description 1 Sensor SEN AERS sensor 2 Technology IR Infrared CR Cold temperature infrared DT Dual technology infrared and ultra sonic LS Light level sensor (10-200 fc) LT Light level sensor (50-1000 fc) US Ultrasonic detection 3 Voltage C1 120V AC Conduit system C2 277V AC Conduit system H2 277V AC Holoflex modular wiring system LV 24V DC Low voltage class II wiring system 4 Lens Coverage WH Warehouse aisle lens (Not available LS, LT, US) GW General wide area lens (Not available LS, LT, US) GN General narrow area lens (Not available LS, LT, US) Fixture type Consult appropriate data sheet for specific ordering information. To add AERS control to the luminaire catalog number, add the option below. HPS AERS-35 AERS-50 MH AERS-50 35% low level 50% low level 50% low level Automatic Energy Reduction Sys-tem. 250W, 400W HPS and 250W and 400W MH. Handled through Holophane Technical Service Group (TSG). Control Modules, Sensors and Holoflex (HFW) must be specified through TSG. AERS Control Module How to construct a catalog number type Fixture EXAMPLE: CM D 1 120 1 2 3 4 Catalog no. Description 1 Sensor CM AERS Control Module 2 System type C High voltage conduit system H Holoflex modular wiring system for 277/480 volt AC D Low voltage DC Class II wiring system F Holoflex modular wiring system for 120/208 volt AC 3 Output voltage 1 12 volts. Available with D only 2 24 volts. Available with D only 4 Input voltage 120 120 volt AC (C,D2 only) 208 208 volt AC (C, D2 only) 240 240 volt AC (D2 only) 277 277 volt AC 480 480 volt AC, (C, H only) Order number Job name AERS 7 HOLOPHANE
Performance Specification System shall be composed of Holophane luminaire, occupancy sensor (contact closure), and control module. For performance specifications of selected luminaire, please refer to the appropriate product brochure, i.e., Prismpack V, HL-1003. The 250 or 400 watt high pressure sodium ballast should offer two low energy level choices, 50% or 35%. Average input wattage over life for a watt lamp at normal level should not exceed watts, watts at 50% level, or watts at 35% level. Average life measured between 100-150 lamp volts. The 250 or 400 watt metal halide ballast should provide a 50% energy level. Average input wattage over life for a watt lamp at normal level should not exceed watts, or watts at 50% level. Control module must: 1. Override sensors and keep luminaires on normal mode for 15 minutes allowing lamp stabilization. 2. Link luminaires and sensors in a zone. 3. Allow zone and system override capabilities to both normal and low level operation. System must operate on all available voltages. Control system to be either low voltage DC, high voltage, or high voltage with Holophane Holoflex flexible wiring system. System to be C/UL/US listed. Acuity Lighting Group, Inc. 214 Oakwood Ave., Newark, OH 43055 / Holophane Canada, Inc. 9040 Leslie Street, Suite 208, Richmond Hill, ON L4B 3M4 / Holophane Europe Limited, Bond Ave., Milton Keynes MK1 1JG, England / Holophane, S.A. de C.V., Apartado Postal No. 986, Naucalpan de Juarez, 53000 Edo. de Mexico Contact your local Holophane factory sales representative for application assistance, and computer-aided design and cost studies. For information on other Holophane products and systems, call the Inside Sales Service Department at 740-345-9631. In Canada call 905-707- 5830 or fax 905-707-5695. Limited Warranty and Limitation of Liability Refer to the Holophane limited material warranty and limitation of liability on this product, which are published in the Terms and Conditions section of the current product digest, and is available from our local Holophane sales representative. Visit our web site at www.holophane.com HL-1161 4/03 2003 Acuity Lighting Group, Inc Printed in USA