Equipment Sizing Sample Clauses

Equipment Sizing. 3.2.1.1 Contractor shall be responsible for sizing the unit auxiliary transformers, the station service transformers and all other distribution equipment, cables and components. Simultaneous starting of all three CTG units is not a requirement. Contractor shall become familiar with the start-up operations of LM6000 units and determine the starting currents required by the cranking motors, air purge fans, pumps and compressor loads to size the auxiliaries. 3.2.1.2 It is preferred due to noise considerations that auxiliary transformer be self-cooled (ONAN) only. Station auxiliary and service transformers shall be sized such that the calculated maximum operating load does not exceed 100% of the transformer rating. ‘Load’ is defined as carrying its primary load plus closing the tie breaker to pick up the other transformer’s load. Switchgear buses, MCC buses and distribution panels shall not be loaded greater than 80% of their rated capacity. Cables shall be sized in accordance with the requirements of Section 7.5.14. An appropriate amount of spare motor starters and feeder circuit breakers (up to a maximum of 10%) representative of the sizes utilized in MCCs and distribution panel boards shall be installed and available to Company for future use (this does not include the space and capacity allowance required for the addition of the future unit). 3.2.1.3 Capability curves for the generator(s) will be provided by Company to Contractor for use in demonstrating that the generator, the generator main interconnection buses, generator step-up transformer and the associated cooling systems are adequately rated to transfer the output of the prime mover under the complete range of loading conditions, operating modes and ambient conditions. “Adequately rated” means that the generator insulation temperature rise is Class F and the generator operating temperature rise is Class B, which shall not be exceeded; and the generator step-up transformer hot spot temperature shall not exceed 95°C.