1.0 General Description
This section contains the design standards, general equipment type and configuration, components, product description, warranty and installation requirements for harmonic mitigation, phase balancing, lightning protection and power factor correction. The equipment utilizes an active harmonic filter technology, enabling the electrical improvement of harmonic rich environments, along with power factor improvements in AC electrical power systems. The finished products are designed, assembled, tested and shipped as a complete system by the manufacturer. Equipment finished in any other manner is not acceptable.
2.0 System and Environment
EBU systems utilize an active filter technology, and shall be suitable for both indoor and outdoor environments, and are intended as either stand-alone units or integrated with other equipment such as motor control centers, switchboards, switchgear, static switches, UPS (Uninterruptible Power Supply) systems, or distributed power generation systems. Equipment is intended for use with voltage classifications ranging from 208 to 600 VAC. Equipment shall be used on 3 or 4-wire three phase wye systems (grounded or ungrounded), or delta systems operating at either 50 Hz or 60 Hz. Equipment is designed for reliable operation in ambient temperatures of 0 degrees C to 40 degrees C, up to 3250 feet (1000 meters) above sea level, with relative humidity of 95%. The finished DMI Manufacturing Inc. equipment shall be listed to UL508A, CSA C22.2 No. 14 File Number E212310.
3.0 Basic Equipment Type
The EBU systems active harmonic filter is an assembly, intended to monitor non-linear loads and dynamically correct a wide spectrum of harmonic problems. Each unit incorporates a unique active filter technology which shall utilize power electronics for their operation and includes functions for switching, injection noise cancellation, as well as the automatic monitoring and control of AC power within the location. When installed, the EBU’s active filter shall provide 5% THD or less at the load, where applicable, while not adversely affecting the load in the form of a resonance condition. Electrical current distortions shall be corrected on the 3rd through the 300th harmonic order. Each harmonic order shall maintain a consistent and maximum level of performance. A resonant condition occurring within the electrical power system between the active filter and load shall not cause the active filter to stop functioning properly.
A constant, proportional value of power factor correction compensation (.95 lagging), is inherent in the design of the active filter, along with the capability to allow for the use of additional power factor correction capacitor modules. Active harmonic filter apparatus allows for operation in a mode whereby either the harmonic mitigation or both the harmonic mitigation and power factor correction are not acceptable due to performance deterioration. The unique design of the EBU’s active filter allows for additional active filters to be installed in a parallel arrangement, as well as supporting the use of existing filters on the electrical system. The placement of the equipment is done in such a manner that it allows for the mitigation of single loads, multiple loads, or complete facility loads.
The power electronics implemented in the active filter is designed to operate well within the environmental tolerances at any type of location. Power fuses, rated at 6502 joules, are implemented for protection of the power electronic TVSS modules. When initially energized, the active filters AC capacitors charge with a soft start time of 4 seconds. Steady state is reached at 100% step load (the time required for the current to go from 0A to the rated compensation amperes), where TS<20ms. An iterative transformer controller with Discrete Iterative Transform (IT) algorithm topology and analysis are used to calculate the minimum performance response time, where TRmin<10ms. Multiple active EBU’s have the capability to be connected in parallel for additional load capacity, as well as providing additional individual rating of amperes. Equipment is upgradeable for “field” installations with existing active filters. Active filters operate in full compensation mode without shut-down, should additional loads be added (no overload). The active harmonic filter stages meet the following specific performance standards for harmonic mitigation, surge immunity, electromagnetic compatibility, design and safety:
IEEE519 / EN61000-3-4 Harmonic Mitigation Guidelines
IEEE587/ANSI C62.41/ EN61000-4-5 Surge Immunity
FCC Part 15 / EN55011 Electromagnetic compatibility
UL508, UL508A / EN50178, EN60146 Safety/Design
4.0 Equipment Specifications and References
Specifications:
A. American National Standards Institute (ANSI)
B. Institute of Electrical and Electronic Engineers (IEEE)
C. National Electrical Manufacturers Association (NEMA)
D. Underwriters Laboratories, Inc (UL)
E. Canadian Standards Association (CSA)
F. International Electromechanical Commission (IEC)
G. European Standards (EN)
References:
A. Low voltage power distribution equipment, motor control centers, switches, switchboards, switchgear, static switches, fixed motor load and switched power factor correction capacitors and harmonic mitigation systems
B. Medium voltage switchgear, switches and static transfer switches
C. Medium voltage metal enclosed capacitors and harmonic filters
D. Engine-generator control, distributed generation systems, paralleling switchgear
E. Energy management and other power quality equipment and components
5.0 Submittals
Common information, where applicable, include equipment plan view, outline, dimensions, active filter sections, incoming locations, cable entry, main bus, fuse and active filter ratings (if installed), as well as capacitor ratings, mounting locations, and component technical descriptions. Any other equipment for power quality, and components installed, need to be added to our specification sheet for questions.
6.0 Construction Guidelines
Equipment design follows the most recent applicable UL standards and guidelines, and meets the intended application requirements in your state. Installation and operation of equipment is for residential, business, commercial, industrial, government and energy or utility service providers. Enclosures shall be rated as NEMA 12 (indoor) and NEMA 4 (outdoor). The design and construction integrity of the finished assembly shall allow for the equipment to be lifted, or slid into place. The “ready to ship” equipment shall meet stringent, applicable engineering and design standards and is neatly constructed and finished; meeting all DMI Manufacturing Inc. quality and production control standards, prior to shipment.
7.0 Systems Integration
The EBU system easily integrates with other companies’ power quality related components and devices, allowing for maximum equipment provisions. Where applicable, the equipment has been designed for system and physical integration with new or existing power distribution equipment.
8.0 Testing and Safety
The equipment is production tested, prior to shipment. This includes testing of its mechanical and electrical operation, control wiring, circuit continuity, and polarity verification. Major electrical, electronic, and mechanical components and devices integral to the equipment include testing reports and technical information and other such data, where applicable. The finished equipment includes nameplates, labels, and various other decals, providing applicable safety and general operating instruction. Such markings are visually accessible and conveniently located both internally and externally.
9.0 Equipment Documentation
The finished equipment is provided under Operations and Maintenance Instructions.
10.0 Equipment Installation
Professional installation is required for proper performance and function of the EBU Units. Physical inspection of equipment for damage is recommended prior to any installation. Indoor storage for both indoor and outdoor rated equipment should be done in a clean, dry environment, and where recommended, may require the removal of packaging materials. Outdoor storage of outdoor equipment shall require installation of any materials shipped for site assembly, such as the mating of equipment shipping splits. Where recommended, packaging materials may be required to be removed. Equipment includes removable lifting lugs, for transport site installation handling.
As a cautionary note, the placement of the EBU shall be at both a level and solid location for correct operation. National Electrical Code (NEC), electric utility company or service provider codes shall be adhered to during the installation. Electrical connections shall also be in compliance with required codes.
11.0 Installer/Contractor shall inspect and verify proper alignment, anchorage and grounding, proper connections and tightness of connections, prior to any start-up functions. It is also recommended that the electrical lugs are checked for tightness after the shipment arrives to the location, to ensure that no wires are loose.
DMI Manufacturing, Inc.., guarantees that the Energy Bank Unit will reduce energy consumption by at least 11%. This guarantee will be determined by measuring kilowatt hours with and without the EBU connected to the electrical system. The period of time shall be 60 days from date of installation. Measurement shall be determined by use of ASTM approved methods and devices. Twelve months of prior electric bills shall be furnished to establish useage. Any change in electrical equipment in the building will be factored into this comparison. If this comparison does not confirm at least an 11% savings and the EBU is in satisfactory condition, EBU will return all monies paid out and remove the EBU at the expense of
DMI Manufacturing, Inc.
DMI Manufacturing, Inc. warrants that the EBU will perform in accordance with the representations made in the accompanying literature and further warrants that it will replace any product which is defective as a result of defective materials or construction for a period of twenty(20) years from the date of installation. This warranty is voided if the EBU has been tampered with or modified in any manner or has been reinstalled at a different location from it’s original intent or the user has significantly increased the electrical load on the device without replacement or confirmation of applicability from
DMI Manufacturing, Inc. |
