Automatic Reclosing. The customer is not allowed to automatically reclose parallel to SPPCo's system if any of the protective devices operate. However, if the customer ceases parallel operation with SPPCo because of an anti-motoring operation or lack of applicable power source (wind, water, etc.), the customer is allowed to automatically reclose parallel to SPPCo system when the energy source resumes to sufficient amounts. The distinctions between disallowing or allowing automatic reclosing are:
Automatic Reclosing. The need for automatic reclosing modifications is directed towards protection of the GPU System and the equipment of GPU Energy customers from potential damage. It is the Power Producer's responsibility to evaluate the potential effect of GPU Energy's reclosing practices on its generator and to provide suitable protection. GPU Energy normally provides automatic multiple shot reclosing with no intentional time delay on the first shot on all distribution line circuit breakers. Additionally, automatic sectionalizing for faults is provided on the distribution system with electronic and hydraulic reclosers that reclose in approximately 2 seconds following a trip operation. To protect both GPU Energy and GPU Energy customers' equipment from possible damage due to out-of-phase reclosing, the substation distribution line circuit breaker and the line reclosers may have to be modified, at the expense of the Power Producer, with voltage check relays unless the size and characteristics of the generator indicate that immediate reclosing would not be hazardous to the GPU System. These relays will block reclosing until the parallel generation on a line or line section is de-energized. Lines operated at 34.5 kV Delta and above also utilize multi-shot automatic reclosing with the first shot delayed approximately 20 cycles. Reclosing logic for these lines must be modified, at the expense of the Power Producer, to include synchronism checking.
Automatic Reclosing. The Utility employs automatic multiple-shot reclosing on most of the Utility’s circuit breakers and circuit reclosers to increase the reliability of service to its customers. Automatic single-phase and three phase overhead reclosers may be installed on distribution circuits to isolate faulted segments of these circuits. The Customer-Generator is advised to consider the effects of Automatic Reclosing (both single-phase and three- phase) to assure that the Generating Facility’s internal equipment will not be damaged. In addition to the risk of damage to the Generating Facility, an out-of-phase reclosing operation may also present a hazard to Utility’s electric system equipment since this equipment may not be rated or built to withstand this type of reclosing. Should the Utility determine relaying and control equipment that needs to be installed to protect its own equipment from out-of-phase reclosing. Installation of this protection will be undertaken by the Utility at the Customer-Generator’s expense.
Automatic Reclosing. Operator shall be solely responsible for the protection of its equipment from automatic reclosing operations by Company unless the generator breaker at the Plant is part of or integral to a breaker and a half or ring bus arrangement owned and operated by Company, in which case the Company will assume the responsibility for properly coordinating the reclosing operations on such generator breaker. Except as otherwise provided herein, Company shall have no responsibility for or liability in connection with damages caused by automatic reclosing operations by Company out-of-phase with Operators generators, all of the foregoing being the responsibility of Operator.
