245 KV CIRCUIT SWITCHER

2026-11-03

1 . 1 The Town of Apex ( Owner ) intends to procure an outdoor 245 kV circuit switcher for protection of a substation power transformer . The primary function of the circuit switcher will be switching and protection of a 230 kV - 23 kV twowinding delta - wye power transformer . The unit shall be complete and ready for operation upon completion of erection and the application of the Owner ’ s supply voltage and relaying package . The Seller ’ s work consists of providing all labor , materials , equipment , tools and supplies required to design , manufacture , test and deliver the outdoor circuit switcher and associated components as described herein . This specification is written based upon SF6 insulation / interruption . Alternatives will be considered . 1 . 2 The unit shall be designed to accommodate the automatic interruption of faults occurring on the load side of the unit . The unit shall initiate an automatic trip operation when such fault conditions are detected by an appropriate external relay system . Using a shunt trip mechanism , the unit shall provide safe interruption of service to the faulted bus and transmission facilities when applied within the guidelines of ANSI C37 and other applicable standards . 1 . 3 The unit shall utilize a motor - compressed spring - operated mechanism which can provide an open - close - open operation at rated short - circuit current or at other required capabilities after loss of control power to the mechanism and thereafter recharge the spring mechanism within 15 seconds following application of control power . 1 . 4 The Owner will supply control / utilization voltages as listed herein . The Seller shall not provide equipment that does not operate at the voltages provided unless prior approval is obtained from the Owner . If the Owner approves , the manufacturer is responsible for providing all transformation necessary to convert the Owner ’ s supplied voltage to the required utilization voltage . 1 . 5 The Seller shall assume all costs and risks for delivery of the products to the designated site . 1 . 6 All components incorporated into the manufactured product shall be new and of high quality . All workmanship shall be of good quality and free from defects . The Seller shall , if required by the Engineer , furnish satisfactory evidence as to the source , kind and quality of the components incorporated into the system configuration . 1 . 7 The Seller ’ s products shall include the major material items as required in the technical specifications for each enclosure or assembly . Incidental materials , tools and fabrications not included herein , but required for construction of a completely assembled and functional product shall be furnished by the Seller . 1 . 8 All services provided by the Seller during the course of assembly , testing and training shall be performed by competent personnel technically qualified for the service to be performed . 1 . 9 All components and services furnished in the manufacture of the product shall be subject to inspection , tests and approval by the Owner . The Seller shall provide adequate facilities for inspecting and testing the system prior to shipment . 1 . 10 The Owner reserves the right to reject any or all components failing to comply with the technical specifications or failing to comply with the characteristics represented by the Seller ’ s proposal , and as mutually agreed upon by the terms of the contract . The elapsed time for discovery of such noncompliance and subsequent rejection shall , at a minimum , include factory test dates and extend to one year following delivery of the manufactured product . 1 . 11 On behalf of the Owner , the Engineer will have authority to disapprove or reject materials or services that are defective or lack compliance with the Technical Specifications . 1 . 12 Upon discovery of noncompliance , the Owner shall notify the Seller in writing as to the nature of the defect within 60 days after such discovery . Upon receipt of notice , the Bidder shall replace the rejected components to the extent necessary to comply with the specifications and contract . In doing so , the Seller shall bear all costs for shipment of rejected components and replacement components . Should the Seller fail to replace rejected components , the Owner may elect to replace such components directly and deduct the cost of replacement from final payments due the Seller . 2 . 0 STANDARDS Circuit switcher furnished in accordance with these technical specifications shall conform to the latest revision of ANSI C37 and all other applicable standards 3 . 0 UNIT RATINGS AND CHARACTERISTICS 3 . 1 Model type : Vertical interrupter , no disconnect , “ candlestick ”. 3 . 2 120 ” phase spacing . 3 . 3 Circuit switcher shall deliver the full ratings of performance in ambient temperatures ranging from - 30 ° C to + 40 ° C , and at altitudes up to 1000 meters ( 3300 feet ). Operating altitude shall not adversely affect the fault current interrupting rating of the circuit breaker or the rated interrupting time of the circuit breaker . 3 . 4 When installed in accordance with manufacturer ’ s structural design , circuit breakers shall withstand seismic loadings for Apex , NC .

North Carolina

2026-05-08