Protective Relays o Battery and Uninterruptible Power Supply Systems -------------------------------------------------------------------------------- Proprietary Information Page 1 AES IRONWOOD CONTRACT FINAL ISSUE - OCTOBER 30, 1998 -------------------------------------------------------------------------------- GENERAL REQUIREMENTS
Protective Relays. Metering and protection of the balance of plant electrical equipment against over loads, short circuits and abnormal operating conditions is provided by the plant protective relay panelboards. These panelboards incorporate the protection of the generator step-up transformer, the steam turbine-generator, and the station auxiliary transformer. 6.9 kV and 480 V feeder protection is provided by the switchgear that serves those circuits. The plant protective relay panelboards include the following relays, meters and transducers/outputs:
Protective Relays. General. Century shall perform, or cause to be performed, all work and services necessary or appropriate to engineer, design, develop, procure, install, own, operate and maintain the Protective Relays (the "Work") in accordance with this Agreement and subject to the rights and obligations of Big Rivers and Kenergy set forth herein.
Protective Relays. All protective relays shall be digital-type with industry standard communications port provided with external targets to show relay operation to assist operator in determining which relays have operated.
Protective Relays. Protective relays shall be provided as shown on the design one line diagram and shall be mounted semi flush on the switchgear door. All relays shall be drawing out utility grade switchgear relays suitable for the indicated application and 125V DC control power. Spare contacts shall be wired to terminal blocks. Lockout relays shall annunciate to the DCS SOE whenever a relay target effects a lockout event.
Protective Relays. Each Party shall provide and maintain mutually beneficial protective relay schemes on its side of the Point of Receipt. Generator agrees to have all such protective relay scheme settings reviewed and approved by Transmission Owner, which approval shall not be unreasonably withheld or delayed, in order to ensure proper coordination with existing Transmission Owner protective relay schemes, and further agrees to operate such schemes in compliance with Transmission Owner-approved settings. Each Party agrees to test such schemes at intervals determined by Transmission Provider consistent with Good Utility Practice. Upon completion of each test, the results of the test shall be provided to the other Party. Each Party will notify the other in writing as soon as practicable of any failures in, or any setting or design changes to, such protective relay schemes.
Protective Relays. Electromechanical
Protective Relays. Solid-State
Protective Relays. The Operator shall operate the Power Station with all of its protective relays in service whenever the Power Station is connected to or is in parallel with the PLN grid system. Any deviation shall only be for brief periods of emergency or maintenance and repair.
Protective Relays. 12.1 Relays shall be Microprocessor based and suitable for flush or semi flush mounting with connections from rear. Protective relays shall be in draw out cases. Load Analyzer / Load manager shall have Communication port to interface with the Plant DCS / Control room.
