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. 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 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. Regulating Apparatus.
Protective Relays. Xxxxxxxx Electric Model M3420 2ea
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. 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.
