JONES AIRWAYS LLC CLEVELAND REGIONAL AIRPORT MAA-12-11 ROBERDS P.E. 2012-224 16475-1 OVERCURRENT PROTECTION SECTION 16475 OVERCURRENT PROTECTION PART 1 - GENERAL 1.01 Summary: A. Provide fuses and circuit breakers of ampere rating and U.L. Classification as indicated on the drawings. B. Related Sections: 1. Section 16050: 2. Section 16430: 3. Section 16440: 4. Section 16170: 5. Section 16470: 1.02 Electrical General Main Distribution Panel Disconnect Switches Motors and Equipment Connections Panelboards Submittals: A. Product Data 1. Manufacturers: Product Data Sheets 2. Time - Current Characteristic Curves (Average Melt) 3. Current Limitation Curves PART 2 - PRODUCTS 2.01 Manufacturers: A. Acceptable Manufacturers - Fuses: 1. Products specified as standard of quality are manufactured by Cooper Industries, Bussmann Division, referred to as Bussmann. 2. Products of manufacturers listed below meeting indicated standards and specified manufacturer's product data characteristics, except as modified below, are acceptable for use, subject to prior approval of proposed product list. a. Gould Shawmut 3. All fuses shall be of the same manufacturer. B. Acceptable Manufacturers - Circuit Breakers 1. Products specified as standard of quality are manufactured by Square D Company, referred to as Square D. 2. Products of manufacturers listed below meeting indicated standards and specified manufacturer's product data characteristics, except as modified below, are acceptable for use, subject to prior approval of proposed product list. a. General Electric b. Siemens/ITE c. Westinghouse 3. Circuit breakers shall be of the same manufacturer as the panelboard or enclosure in which they are installed. JONES AIRWAYS LLC CLEVELAND REGIONAL AIRPORT MAA-12-11 ROBERDS P.E. 2012-224 2.02 16475-2 OVERCURRENT PROTECTION Fuses: A. Mains, Feeders and Branch Circuits: 1. Circuits 601 to 6000 amperes shall be protected by current limiting BUSSMANN LOW-PEAK time-delay fuses KRP-C(amp)SP. Fuses shall employ "0" rings as positive seals between the end bells and the glass melamine fuse barrel. Fuse links shall be pure silver (99.9% pure) to limit the short circuit current let-through values to low levels and comply with NEC Sections requiring component protection. The terminals shall be peened. Fuses shall be time-delay and shall hold 500% of rated current for a minimum of 4 seconds, clear 20 times rated current in .01 seconds or less and be listed by Underwriters Laboratories Inc. with an interrupting rating of 300,000 amperes RMS symmetrical. The fuses shall be UL Class L. Fuses shall be "LOW-PEAK YELLOW" in color. 2. Circuits 0 to 600 amperes shall be protected by current limiting BUSSMANN LOW-PEAK dual-element fuses LPN-RK, LPS-RK, or LPJ. All dual-element fuses shall have separate overload and short-circuit elements. Fuses shall incorporate a spring activated thermal overload element having a 284 degree Fahrenheit melting point alloy and shall be independent of the short-circuit clearing chamber. The fuse shall hold 500% of rated current for a minimum of 10 seconds (30A, 250V Class RK1 case size shall be a minimum of 8 seconds at 500% of rated current) and be listed by Underwriters Laboratories, Inc with an interrupting rating of 300,000 amperes RMS symmetrical. The fuses shall be Time-Delay UL Class RK1 or J to maintain the engineered protection of the system components. Fuses shall be "LOW-PEAK YELLOW" in color. B. Spares: 1. Upon completion of the building, the electrical contractor shall provide the Owner with spare fuses as shown below: a. 10% (minimum of 3) of each type and rating installed fuses shall be supplied as spares. 2. BUSSMANN spare fuse cabinet - Catalog No. SFC shall be provided to store the above spares. The spare fuse cabinet (SFC) shall include a supply of "LOW-PEAK YELLOW" NOTICE labels. 2.03 Molded Case Circuit Breakers: A. Description: 1. Circuit breakers shall be Square D FA, KA, LA, NH, PA and/or PC one, two or three pole molded case circuit breakers rated 15 through 3000 amperes, 120V.ac, 240V.ac, 277V.ac, 480V.ac, as specified on the drawings. Breakers shall have an interrupting rating to match the panel in which they are installed or as indicated on the drawings. All circuit breakers shall be UL and CSA listed, IEC 157-1 rated, meet NEMA Standard AB1-1975 and Federal Specification W-C-375B/GEN, when applicable. Breakers covered under this specification may be installed in panelboards, switchboards, individual enclosures, motor control centers, combination motor starters or 1-LINE busway plug-in units. B. Construction: 1. Molded case circuit breakers shall have overcenter toggle-type mechanisms, providing quick-make, quick-break action. Breakers shall be calibrated for operation in an ambient temperature of 40 degrees C. Each circuit breaker shall JONES AIRWAYS LLC CLEVELAND REGIONAL AIRPORT MAA-12-11 ROBERDS P.E. 2012-224 16475-3 OVERCURRENT PROTECTION have trip indication by handle position and shall be trip-free. Two and three pole breakers shall be common trip. Each circuit breaker shall have a permanent trip unit containing individual thermal and magnetic trip elements in each pole. Circuit breakers with frame sizes greater than 100 amperes shall have variable magnetic trip elements which are set by a single adjustment (to assure uniform tripping characteristics in each pole). A push-to-trip button shall be provided on the cover for mechanically tripping the circuit breaker. the circuit breaker shall have reverse connection capability and be suitable for mounting and operating in any position. C. Terminations: 1. Circuit breakers shall have removable lugs. Lugs shall be UL listed for copper and aluminum conductors. Breakers shall be UL listed for installation of mechanical type or compression type lugs. 2.04 Current Limiting Circuit Breakers: A. Description: 1. Current limiting circuit breakers from Square D shall be I-LIMITER IF (20-100 amperes), IK (110-250 amperes) and shall be rated at (240V.ac) (480V.ac) with an interrupting rating of 100,000 rms symmetrical amperes. IL current limiting circuit breakers (300-400 amperes) shall be rated (240V.ac) (480V.ac) with an interrupting rating of 200,000 rms symmetrical amperes. All I-LIMITER circuit breakers shall meet UL requirements as current limiting circuit breakers, be CSA listed, IEC 157-1 rated, meet NEMA Standard AB1-1975 and Federal Specification W-C-375B/GEN. B. Construction: 1. Current limiting circuit breakers shall be supplied in molded case construction. The circuit breaker section shall have an overcenter, trip-free toggle-type mechanism with quick-make, quick-break action. A push-to-trip button shall be provided on the cover for mechanically tripping the circuit breaker. The circuit breaker shall have permanent trip units containing individual thermal and magnetic trip elements in each pole. The thermal trip element shall be calibrated for 40 degrees C. ambient temperature. the breaker shall have reverse connection capability and be suitable for mounting and operating in any position. C. Terminals: 1. The current limiting circuit breakers shall have removable lugs. Lugs shall be UL listed for copper and aluminum conductors. Breakers shall be UL listed for installation of mechanical type or compression type lugs. D. Current and Energy Limitation: 1. On high level fault currents, the I-LIMITER circuit breaker shall peak current and let thru energy and provide a voltage transient-free interruption at near unity power factor. On fault currents below the threshold of limitation, the I-LIMITER circuit breaker shall provide conventional overload and short circuit protection. E. Series Connected Ratings: 1. Combinations for series connected interrupting ratings shall be recognized by Underwriters Laboratories and shall appear in the Recognized Component Directory under the "Circuit Breakers -Series Connected" product category DKSY2. Current limiting circuit breakers shall allow the use of branch circuit JONES AIRWAYS LLC CLEVELAND REGIONAL AIRPORT MAA-12-11 ROBERDS P.E. 2012-224 16475-4 OVERCURRENT PROTECTION breakers with lower interrupting capacities on systems capable of delivering fault currents up to 200,000 rms symmetrical amperes at 480V.ac and 100,000 rms symmetrical amperes at 600V.ac. PART 3 - EXECUTION 3.01 Installation: A. Install fuses in all switches shown on the plans which require fuses. B. Fuses shall not be installed in the switch until equipment is ready to be energized. C. Install "LOW-PEAK YELLOW" NOTICE labels to alert the end user of the engineered level of protection of the electrical equipment. They shall be marked with the proper fuse rating, per the drawings, and placed in a conspicuous location on the enclosure. These labels are available with the spare fuse cabinet (SFC) and are also available upon request from Bussmann. 3.02 Installation - Circuit Breakers A. Install circuit breakers in panelboards, switchboards, distribution panelboards, and enclosures as shown on the drawings. B. Terminate wiring into circuit breaker lug. Tighten lug to torque level as marked on the lug. END OF SECTION 16475