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Protective Relays Sample Clauses

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.
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. Electromechanical 1. Inspect relays for dust and foreign material. Clean accordingly. 2. Remove any rust or metal particles from disk or magnet poles with a magnet cleaner. 3. Inspect relay to make sure that disk does not rub and has good clearance between magnet poles. 4. Inspect relay connections, case connections, taps, screws, nuts, and bolts that are not pivotal joints for tightness. 5. Inspect relay for proper mechanical operation and damage to relay coils. 6. Clean all components of relay that touch when the relay is in normal position and part as the relay operates. 7. Test relay disconnected from the power and trip circuits, across the secondary of the CTs with primary de-energized, and complete a primary circuit test (includes CTs). 8. Test Overcurrent Relay for insulation resistance (do not perform on solid- state relays), zero check, induction disk pickup, time-current characteristics, target and seal-in operation and instantaneous. 9. Verify relay setting for conformance with the recommendations of the protective device coordination study. Calibrate and test for accuracy in accordance with the manufacturers’ recommendation.
Protective Relays. Regulating Apparatus.
Protective Relays. Solid-State 1. Inspect active alarm, relay display messages, self-test alarm messages, and LED indications. 2. Inspect relay physical condition, noting any damage, corrosion, excessive dust, or loose wires. 3. Inspect event recorder file download with further events analysis to compare and verify recorded data corresponds with other independently verified information. 4. Inspect wiring connections for firmness and inspect relay guide clips, shorting clips for wear and damage. 5. Perform analog values injection test (currents, voltages, RTDs, analog inputs) and metering accuracy verification. 6. Test CT inputs, ground inputs, low pass filters, sample and buffers, zero- crossing circuitry and multiplexer with proper certified test equipment. 7. Test each communication port using the UR Setup program (or equivalent) and verify functionality of RS232, RS485, and if applicable Ethernet transceivers. 8. Check setting change history using Viewpoint Maintenance software (or equivalent), noting any unexpected changes. 9. Test trip and close coil monitors, logic inputs, solid-state outputs, output relays, analog outputs and D/A converter. Verify contact inputs and outputs. 10. Perform LED test and pushbutton continuity check. 11. Test battery backup system.
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. 12.2 All protective and tripping relays and timers shall be provided with fault display LEDs.
Protective RelaysThe Contractor shall, in accordance with the Minimum Functional Specifications, install protective relays in the Works having r atings and characteristics approved by the Employer and, until the issuance of the associated Taking-Over Certificate, shall maintain the settings of all such relays at the levels agreed by the Employer and in accordance with the Technical Limits and the Contractor shall not change such settings without the prior written consent of the Employer.
Protective RelaysThe 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.