SECTION TRANSIENT VOLTAGE SURGE SUPPRESSION

Transcription

1 SECTION TRANSIENT VOLTAGE SURGE SUPPRESSION PART 1 GENERAL 1.01 SUMMARY A. Section Includes: Transient Voltage Surge Suppression (TVSS) devices, also known as Surge Protective Devices (SPDs), for the protection of AC electrical circuits and electronic equipment from the effects of lightning induced transients, other externally generated transients, and internally generated transients REFERENCES A. ANSI/IEEE: 1. C (89) Standard Test Specifications for Varistor Surge-Protective Devices. 2. C Recommended Practice on Surge Voltages in Low-Voltage AC Power Circuits. 3. C Guide on Surge Testing for Equipment Connected to Low-Voltage AC Power Circuits Recommended Practice for Grounding of Industrial and Commercial Power Systems (IEEE Green Book). B. Underwriters Laboratories (UL): 1. UL 1449 Standard for Safety, Transient Voltage Surge Suppressors. 2. UL 1283 Electromagnetic Interference Filters. C. National Fire Protection Association (NFPA): 1. NFPA 70 National Electrical Code. 2. NFPA 75 Standard for the Protection of Electronic Computer/Data Producing Equipment. 3. NFPA 780 Lightning Protection Standard. D. Federal Information Processing Standards 94 (FIPS PUB 94). E. National Electrical Manufacturer s Association LS-1, 1992 (NEMA LS-1). Project No. SPECIFICATION GUIDELINES

2 1.03 QUALITY ASSURANCE A. The manufacturer shall submit a written statement indicating that a factory authorized representative inspected the installation. The installing contractor shall submit a checkout memorandum to the manufacturer indicating the date the equipment was placed into service and the actual method of installation. Submit three copies to the specifying engineer. B. All SPDs for service entrance, distribution, and branch circuit protection within a facility shall be provided by a single manufacturer WARRANTY A. The SPD and supporting components shall be guaranteed by the manufacturer to be free of defects in material and workmanship for a period of 5 years from the date of substantial completion of service and activation of the system to which the suppressor is attached. B. An SPD that shows evidence of failure or incorrect operation during the warranty period shall be repaired or replaced at no expense to the Board including labor and materials. Since "Acts of Nature" or similar statements typically include the threat of lightning to which the SPD shall be exposed, any such clause limiting warranty responsibility in the general conditions of this specification shall not apply to this section. The warranty shall cover the entire device, not just the modules. C. The installation of SPDs in or on electrical distribution equipment shall in no way compromise or violate equipment listing, labeling, or warranty of the distribution equipment SUBMITTALS A. The transient voltage surge suppression submittals shall include, but not be limited to, the following information: 1. Data for each suppressor type indicating conductor sizes, conductor types, and connection configuration and lead lengths. 2. Manufacturer s certified test data indicating the Project No. SPECIFICATION GUIDELINES

3 ability of the product to meet or exceed requirements of this specification. 3. Drawings, with dimensions, indicating SPD mounting arrangement and lead length configuration, and mounting arrangement of any optional remote diagnostic equipment and assemblies. 4. List and detail protection systems such as fuses, disconnecting means, and protective materials. 5. SPD wiring, bonding, and grounding connections shall be indicated on the wiring diagrams for each system. Include installation details demonstrating mechanical and electrical connections to equipment to be protected. 6. If requested, a sample of each suppressor type shall be submitted for use in testing and evaluation. PART 2 PRODUCTS 2.01 MANUFACTURERS A. Transient Voltage Surge Suppression: 1. Advanced Protection Technologies, Clearwater, FL. 2. Atlantic Scientific. 3. Diversified Technology Group (DITEK). 4. EDCO. 5. Hubbell-Kellems, Milford, CT. 6. Intermatic, Spring Grove, IL. 7. LEA International by Power Logics, Apollo Beach, FL. 8. Transtector, Hayden Lake, ID PERFORMANCE A. General: 1. SPDs shall be listed according to UL 1449 Standard for Safety, Transient Voltage Surge Suppressors, and UL 1283, Electromagnetic Interference Filters. 2. There shall be 7 modes of protection: 3-modes (Line-to- Ground), 3-modes (Line-to-Neutral), and 1-mode (Neutral-to-Ground) for a 3-phase, 4-Wire plus ground voltage system. (Line-to-Neutral-to-Ground is not an acceptable substitute for Line-to-Ground). 3. The UL 1449 Clamping Voltage for the following configurations shall not exceed the following: Project No. SPECIFICATION GUIDELINES

4 VOLTAGE CONFIGURATION L-G L-N N-G 120/208V 400V 400V 400V 277/480V 800V 800V 800V 4. The unit shall be UL 1283 listed as an electromagnetic interference filter. Standardized insertion loss data shall be obtained using MIL-STD E220A 50W insertion loss methodology. Minimum insertion loss shall be as follows: FREQUENCY[MHz] INSERTION LOSS[dB] SPDs shall use a separate path to building ground, the equipment safety ground is not to be used as a transient ground path. 6. SPDs shall be constructed using MOV based modules. The SPD shall have a response time of less than one nanosecond with 6 inches or less of connected lead length for any individual protection mode. 7. Each MOV contained within a current diversion module shall be individually fused (component level safety fusing). For the assurance of safety purposes, this feature shall be a standard design feature and not an optional feature of the product. The individual component level fusing shall allow a reduction of protection rather than an automatic complete loss of protection. 8. The maximum continuous operating voltage (MCOV) of all components shall not be less than 125 percent for a 120V system and 115 percent for 220, 240, 277, and 480V systems. B. Service Entrance Protection: 1. The SPD for this location shall be referred to as [TVSS Type 1] on project drawings. 2. The service entrance TVSS equipment shall meet or exceed the minimum performance criteria as follows: a. The SPD shall be by, model, or accepted equivalent. b. The single-impulse surge-current rating shall be a minimum of Amps/phase. Project No. SPECIFICATION GUIDELINES

5 c. SPD shall be provided with an integral fused disconnect. Switches shall have a fault withstand rating equal or greater than the AIC rating of the equipment being protected. The disconnect switch shall have an interlocking rotary type safety switch that turns power off to the device upon opening the enclosure for safe inspection and/or module replacement. d. Visual Indication of proper SPD connection and operation shall be provided both on the modules and redundant on the front door of the enclosure. The indicator lights shall indicate which phase as well as which module is operational. SPD that require a separate diagnostic test kit to determine proper module operation must be provided. e. SPD shall incorporate copper bus bars for the surge current path. Small round wiring or plug-in modules are not acceptable. Field-replaceable surge-current diversion modules shall be bolted to the bus bars for reliable low impedance connections. f. The enclosure type shall be rated NEMA 12. C. Distribution Panel Protection: 1. The SPD for this location shall be referred to as [TVSS Type 2] on project drawings. 2. The distribution panel TVSS equipment shall meet or exceed the minimum performance criteria as follows: a. The SPD shall be by, model, or accepted equivalent. b. The single-impulse surge-current rating shall be a minimum of Amps/phase. c. Visual indication of proper SPD connection and operation shall be provided both on the modules and redundant on the front door of the enclosure. The indicator lights shall indicate which phase as well as which module is operational. d. SPD shall incorporate copper bus bars for the surge current path. Small diameter round wiring and the use of plug-in modules is not acceptable. Surge current diversion modules shall use bolted connections to the bus bars for reliable low impedance connections. e. The enclosure type shall be rated NEMA 12. D. Subpanel Protection: Project No. SPECIFICATION GUIDELINES

6 1. The SPD for this location shall be referred to as [TVSS Type 3] on project drawings. 2. The subpanel TVSS equipment shall meet or exceed the minimum performance criteria as follows: a. The SPD shall be by, model, or accepted equivalent. b. SPD shall be of compact non-modular design. The mounting position of the SPD shall allow a straight and short lead-length connection between the SPD and the point of connection in the panelboard. c. The single-impulse surge-current rating shall be a minimum of Amps/phase. d. Visual indication of proper SPD connection and operation shall be easily viewed through the front door of the enclosure. The indicator lights shall indicate the presence of protection on each phase. e. The enclosure type shall have minimum rating of NEMA 12. PART 3 EXECUTION 3.01 INSTALLATION A. The installing contractor shall install the parallel SPD with short and straight conductors as practically possible. B. The contractor shall follow the SPD manufacturer s recommended installation practice as found in the equipment installation manual. C. The installation shall apply to all applicable codes. END OF SECTION Project No. SPECIFICATION GUIDELINES