Common use of Re-verification Schedules for Protection and Control Clause in Contracts

Re-verification Schedules for Protection and Control. 11.1. Station protection and control systems that can impact on the Distribution System shall be re- verified regularly. The maintenance cycle can be site specific, however, testing intervals for protection systems should not exceed four (4) years for microprocessor-based systems and two (2) years for electro-mechanical based systems or as required by a Transmission Controlling Authority. 11.2. The Customer shall provide Horizon Utilities with at least fourteen (14) Business Days‟ notice of its intention to conduct a re-verification test, so that Horizon Utilities‟ protection and control staff and system performance staff (if required) can observe:  re-verification of protection equipment settings specified in this Agreement  relay re-calibration  test tripping of station breakers that impact on Horizon Utilities/Customer interface  measurement and analysis of secondary AC voltages and currents to confirm measuring circuit integrity 11.3. All tests are required to be coordinated and approved ahead of time through the normal outage planning process. 11.4. The following specific actions are required: 11.4.1. Observe all station protections that trip and open the following devices for proper operation.