ATRs definition
ATRs as used herein refers to the acceleration trend relays, which include equipment and computer systems used to detect acceleration in the generation shafts of Colstrip Units 1&2 and Colstrip Units 3&4, and selectively trips the appropriate Colstrip Exhibit A - 4 - units(s) and the generation at the Montana One project, so that the electrically connected system meets the stability requirements of WSCC. BROADVIEW-▇▇▇▇▇▇▇▇ SEGMENT 500 kV Transmission Line Sections 1. Two overhead 500 kV lines, each approximately 133 miles long, extending from the Broadview 500 kV switchyard to the interconnection point with Bonneville Power Administration’s 500 kV double-circuit line near Townsend, Montana. 500 kV Switchyards and Substations 2. A portion of the Broadview 500 kV switchyard immediately north of Montana’s existing Broadview 230 kV switchyard and substation including the following major equipment and associated structures and facilities related to the Broadview- ▇▇▇▇▇▇▇▇ 500 kV lines: All 500 kV Transmission Line Relays 2 Banks – 500 kV Shunt Line Reactors (approx. 225 Mvar. (each)) including relays 2 – Neutral Reactors for Single Pole Switching, including relays 1 Bank – 34.5 kV Switchable Shunt Reactors for System Voltage Control (approx. 90 Mvar.), including relays ** 7/18 of the following Common Facilities: **** 7 – 500 kV Power Circuit Breakers and 500 kV Buswork 230 kV Buswork to Interconnect at Two Existing Disconnect Switches in Montana’s 230 kV Bus 2 – 34.5 kV Station Power Transformers Fencing, Except Immediately Adjacent to Montana’s Existing 230 kV Switchyard 1 – Switchyard Control House 1 – Warehouse 1 – Emergency Internal Combustion Generation Set Supervisory Control, Telemetering, Relaying and Other Equipment and Devices in the Control House which are Directly Related to the Common Facilities Listed Herein ** Not including 2/9 owned exclusively by Montana **** Allocations of Common Facilities are based on the following: 1 st level – between line positions and transformer positions: 2/6 to transformers and 4/6 to lines 2 nd level – between Transmission System and Montana: Exhibit A - 5 - Transformers: 1/3 to Transmission System and 2/3 to Montana Lines: 100% to Transmission System and 0% to Montana 3 rd level – between Segments: Transmission System: ½ to Colstrip-Broadview Segment and ½ to Broadview-▇▇▇▇▇▇▇▇ Segment Allocation to Broadview-▇▇▇▇▇▇▇▇ Segment of Transmission System is therefore: 1/2 (1 x 4/6 + 1/3 x 2/6) = 7/18 Allocation Computer and AT...
ATRs as used herein refers to the acceleration trend relays, which include equipment and computer systems used to detect acceleration in the generation shafts of Colstrip Units 1&2 and Colstrip Units 3&4, and selectively trips the appropriate Colstrip units(s) and the generation at the Montana One project, so that the electrically connected system meets the stability requirements of WSCC. OTHER The SSR Protection Systems are not included in the Transmission System. The term “SSR Protection Systems” as used herein refers to the plant protection relay equipment that protects Colstrip Units 1&2 and Colstrip Units 3&4 against subsynchronous resonance.
ATRs means Arkansas Teacher Retirement System.