Plant Electrical Auxiliary Systems Sample Clauses

Plant Electrical Auxiliary Systems. The system shall be designed with the current technical equipment available and generally accepted good engineering practices. The system shall be high resistance grounded with ground indication. The facility shall be easily maintained and designed with an emphasis on high availability, high reliability for continuous operation as a base load station. The system shall be flexible to feed power to various buses within the facility from alternate sources, as needed, when an equipment problem arises. Built-in redundancies and duplicities in power feed arrangement within the plant power distribution shall be included by providing double ended substations, battery back-ups, and uninterruptible power supplies (UPS). Transformers shall be delta connected, except for the main transformer (GrY/Δ) and 120/208 (GrY) transformers All transformers shall be selected from standard commercially available kVA/MVA ratings for their nominal and force-cooled ratings. The transformers for double-ended substations shall be fan-cooled, identical to each other and shall be sized to support the loads as follows: During normal operation with the full-rated tie-breaker open, both transformers shall support the individual loads on the respective buses they feed, leaving capacity margins as specified below for future expansion and operate within the self-cooled rating. During one source operation with one main breaker open and the full-rated tie-breaker closed, either transformer shall support the combined loads on both buses without exceeding its highest fan cooled capacity, with a 10% spare ampacity margin. The new facility shall have an individual transformer connected to an individual generator. The plant auxiliary loads shall be divided in a logical fashion. Any multiple units (2-100% pumps, fans, battery chargers, etc.) shall be fed power from two different sources. The cables related to this type of redundancy shall be routed in two different power and control trays to preclude common mode failures. The design of the system shall include capacity for future load additions by Plant. After the Plant is fully operational, plant shall be left with the following spare capacity minimum. Power transformers – 10% of highest fan cooled ampacity MV and LV Switchgear bus ampacity - 10% MV and LV Switchgear breakers – two (2) spare cubicles per bus with a minimum of 1 CB of each frame size, per bus MCC bus – 20% ampacity MCC Units – spare units various ampacity with a minimum of 1 unit of ...
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Related to Plant Electrical Auxiliary Systems

  • Electrical appliance safety The Hirer shall ensure that any electrical appliances brought by them to the premises and used there shall be safe, in good working order, and used in a safe manner in accordance with the Electricity at Work Regulations 1989. Where a residual circuit breaker is provided the hirer must make use of it in the interests of public safety.

  • Electrical Equipment Residents must use only CSA, UL-approved or Canadian-certified electrical equipment; the rated wattage of light fixtures must never be exceeded; and only replacement bulbs supplied by Waterloo maintenance staff may be used. Do not leave any unattended electrical equipment turned on (i.e. hair straighteners, lights etc.)

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  • Drainage Systems (1) Clear culvert inlets, outlets, and sediment catching basins.

  • Electrical Provide drawings for the following systems:

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  • Network Resource Interconnection Service (check if selected)

  • Electrical Service Electrical service for new construction or a renovated existing building shall be 480/277-volt, 3-phase, 4-wire or approved equal. Service shall be sized for HVAC and other mechanical system(s) loads, lighting, general building services, and dedicated computer based office equipment loads. 5 xxxxx per square foot shall be provided for lighting and general service receptacles. Size of neutral conductor of 3- phase circuits shall be twice that of phase conductor to accommodate potential harmonic currents associated with computer system electronic power supplies and fluorescent lighting fixtures electronic ballasts. An adequately sized 3 phase “wye” wound step down transformer shall be provided to supply 208/120-volt, 3 phase power, for lighting, general service receptacles and dedicated computer based office equipment. Dedicated, isolated ground circuits shall be supplied from separate isolated ground power distribution panel(s). Lighting circuits shall be supplied from separate lighting panel(s). Panels shall have 20% spare capacity and be complete with 10% spare breakers of each size, but no less than 1 spare. No more than 4 duplex receptacles shall be connected to any single 20-amp dedicated isolated ground circuit or general service circuit.

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