DRY-TYPE DISTRIBUTION TRANSFORMERS (1500 …

1 DRY-TYPE DISTRIBUTION TRANSFORMERS (1500 KVA AND BELOW)SECTION 16461 16461-1 11/05/15 SECTION 16461 DRY-TYPE DISTRIBUTION TRANSFORMERS ( 1500 KVA AND BELOW)GENERALPART Contractor shall furnish and install single-phase and three-phase general purpose mounted DRY-TYPE TRANSFORMERS of the two-windings type, self-cooled as specified herein, and as shown on the contract TRANSFORMERS and all components shall be designed, manufactured and tested in with the latest applicable standards of ANSI, NEMA and shall meet the requirements of the most current version of federal law 10 CFR 431 "Energy Efficiency Program for Certain Commercial and Industrial Equipment".

2 SUBMITTALS FOR following information shall be submitted to the dimensions and ratings and secondary impulse level (BIL) for equipment over 600 class and temperature data FOR following information shall be submitted for record as-built drawings and information for items listed in Paragraph , and incorporate all changes made during the manufacturing processConnection certification and equipment anchorage details as DISTRIBUTION TRANSFORMERS (1500 KVA AND BELOW)SECTION 16461 16461-2 11/05/15* Note to Spec.

3 Writer - manufacturer of the DRY-TYPE DISTRIBUTION TRANSFORMERS shall be the same as the of the other major electrical DISTRIBUTION equipment on the the equipment specified herein, the manufacturer shall be ISO 9001 or 9002 manufacturer shall be a participant in the UL Data Acceptance Program (DAP) the Client Test Data Program (CTDP) certification to ensure UL test methodologies and record traceability complies with the requirements of ISO must bear the UL Energy Efficiency Verification Mark to confirm that the meets the requirements of 10 CFR Part manufacturer of this equipment shall have produced similar electrical equipment a minimum period of five (5) years.

4 *Provide*Seismic tested equipment as equipment and major components shall be suitable for and certified actual seismic testing to meet all applicable seismic requirements of the [latest International Building Code (IBC)] [latest California Building Code (CBC) with OSHPD Amendments]. [The equipment shall have OSHPD Special Seismic Certification (OSP) Pre-Approval.]The Project Structural Engineer will provide site specific ground motion for use by the manufacturer to establish SDS values IP rating of the equipment shall be Structural Engineer for the Site will evaluate the SDS values on the [Manufacturer s] [OSHPD] website to ascertain that they are "equal to" or "greater than" those required for the Project following minimum mounting and installation guidelines shall be met, specifically modified by the above referenced Contractor shall provide equipment anchorage details, coordinated with equipment mounting provision, prepared and stamped by a licensed civil engineer in the state.

5 Mounting recommendations shall be provided by the manufacturer based upon the above criteria to verify the seismic design of the equipment manufacturer shall certify that the equipment can withstand, is, function following the seismic event, including both vertical and lateral required response spectra as specified in above equipment manufacturer shall document the requirements necessary for seismic mounting of the equipment. Seismic qualification shall be considered achieved when the capability of the equipment, meets or exceeds the specified response DISTRIBUTION TRANSFORMERS (1500 KVA AND BELOW)SECTION 16461 16461-3 11/05/15* Note to Spec.

6 Writer Insert data in blanksAll TRANSFORMERS shall be UL listed and bear the UL , STORAGE AND shall be handled and stored in accordance with manufacturer s instructions. One A.(1) copy of these instructions shall be included with the equipment at time of AND MAINTENANCE operation and maintenance manuals shall be provided with each assembly , and shall include instruction leaflets and instruction bulletins for the complete assembly and each major *_____B.* listing of specific manufacturers above does not imply acceptance of their products that do not meet the specified ratings, features and functions. Manufacturers listed above are not relieved from meeting these specifications in their entirety.

7 Products in compliance with the specification and manufactured by others not named will be considered only if pre-approved by the Engineer ten (10) days prior to bid kVA and voltage ratings shall be as indicated on the shall be designed for continuous operation at rated kVA, for 24 hours a day, days a year operation, with normal life expectancy as defined in ANSI shall meet the requirements of the most current version of federal law 10 CFR 431 "Energy Efficiency Program for Certain Commercial and Industrial Equipment". TRANSFORMERS efficiency shall be measured according to federal law 10 CFR Part sound levels shall not exceed the following ANSI and NEMA levels for ratings: DRY-TYPE DISTRIBUTION TRANSFORMERS (1500 KVA AND BELOW)SECTION 16461 16461-4 11/05/15* Note to Spec.

8 Writer Select one* Note to Spec. Writer Select oneSelf Cooled VentilatedSelf Cooled SealedEquivalent Winding kVA RangeK-Factor=1K-Factor=4K-Factor=9K-Fac tor=13K-Factor= and to to to to to to to to to to to to than 100040404545455050505555606264 Consult Factory40404545485353535858636567 Consult Factory45455050505555555757596163 Consult FactoryF. Where K-factor TRANSFORMERS are indicated on the drawings, the TRANSFORMERS shall be specifically designed to supply circuits with a harmonic profile equal to or less than a K-factor of *[4] [9] [13] [20] without exceeding *[80] [115] [130] [150] degrees C temperature GENERAL PURPOSE insulation system shall be as than 15 kVA: 180 degrees C insulation system with *[80] [115] degree C , encapsulated design; 15 kVA and above: minimum of 200 degree C insulation system with *[80] [115] [130] [150] degree C rise, ventilated *OR--a.

9 1 75 kVA, three-phase ( kVA, single-phase): 180 degrees C insulation system with *[80][115] degree C rise, encapsulated design; 5-45 kVA minimum of 200 degrees C insulation system with * [80] [115] [130] [150] degree C rise; 50 kVA DRY-TYPE DISTRIBUTION TRANSFORMERS (1500 KVA AND BELOW)SECTION 16461 16461-5 11/05/15and above: minimum of 220 degrees C insulation system with *[80] [130] [115] [150] degree C rise, ventilated performance shall be obtained without exceeding the above indicated rise in a 40 degrees C maximum ambient, and a 24-hour average ambient of 30 degrees CAll insulation materials shall be flame-retardant and shall not support combustion defined in ASTM Standard Test Method D635 Core and Coil core shall be constructed with high-grade, non-aging, silicon steel high magnetic permeability, and low hysteresis and eddy current losses.

10 Maximum magnetic flux densities shall be substantially below the saturation point. The transformer core volume shall allow efficient transformer operation at 10% above the nominal tap voltage. The core laminations shall be tightly clamped and compressed. Coils shall be wound of electrical grade *[aluminum][copper] with continuous wound constructionOn three-phase units rated *[75 kVA and below] [45 kVA and below] [30 kVA and ] [15 kVA and below] [9 kVA and below] and single-phase units rated *[ kVA and below] [25 kVA and below] [15 kVA and below] [10 kVA and below] the core and coil assembly shall be completely encapsulated in a proportioned mixture of epoxy or resin and aggregate to provide a moisture proof, shock-resistant seal.